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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960/* SPDX-License-Identifier: GPL-2.0 *//* * AMD Node helper functions and common defines * * Copyright (c) 2024, Advanced Micro Devices, Inc. * All Rights Reserved. * * Author: Yazen Ghannam <Yazen.Ghannam@amd.com> * * Note: * Items in this file may only be used in a single place. * However, it's prudent to keep all AMD Node functionality * in a unified place rather than spreading throughout the * kernel. */
#ifndef _ASM_X86_AMD_NODE_H_#define _ASM_X86_AMD_NODE_H_
#include <linux/pci.h>
#define MAX_AMD_NUM_NODES 8#define AMD_NODE0_PCI_SLOT 0x18
struct pci_dev *amd_node_get_func(u16 node, u8 func);
static inline u16 amd_num_nodes(void){ return topology_amd_nodes_per_pkg() * topology_max_packages();}
#ifdef CONFIG_AMD_NODEint __must_check amd_smn_read(u16 node, u32 address, u32 *value);int __must_check amd_smn_write(u16 node, u32 address, u32 value);
/* Should only be used by the HSMP driver. */int __must_check amd_smn_hsmp_rdwr(u16 node, u32 address, u32 *value, bool write);#elsestatic inline int __must_check amd_smn_read(u16 node, u32 address, u32 *value) { return -ENODEV; }static inline int __must_check amd_smn_write(u16 node, u32 address, u32 value) { return -ENODEV; }
static inline int __must_check amd_smn_hsmp_rdwr(u16 node, u32 address, u32 *value, bool write){ return -ENODEV;}#endif /* CONFIG_AMD_NODE */
/* helper for use with read_poll_timeout */static inline int smn_read_register(u32 reg){ int data, rc;
rc = amd_smn_read(0, reg, &data); if (rc) return rc;
return data;}#endif /*_ASM_X86_AMD_NODE_H_*/