/* 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_*/