1e6e6e5e8SYazen Ghannam /* SPDX-License-Identifier: GPL-2.0 */ 2e6e6e5e8SYazen Ghannam /* 3e6e6e5e8SYazen Ghannam * AMD Node helper functions and common defines 4e6e6e5e8SYazen Ghannam * 5e6e6e5e8SYazen Ghannam * Copyright (c) 2024, Advanced Micro Devices, Inc. 6e6e6e5e8SYazen Ghannam * All Rights Reserved. 7e6e6e5e8SYazen Ghannam * 8e6e6e5e8SYazen Ghannam * Author: Yazen Ghannam <Yazen.Ghannam@amd.com> 9e6e6e5e8SYazen Ghannam * 10e6e6e5e8SYazen Ghannam * Note: 11e6e6e5e8SYazen Ghannam * Items in this file may only be used in a single place. 12e6e6e5e8SYazen Ghannam * However, it's prudent to keep all AMD Node functionality 13e6e6e5e8SYazen Ghannam * in a unified place rather than spreading throughout the 14e6e6e5e8SYazen Ghannam * kernel. 15e6e6e5e8SYazen Ghannam */ 16e6e6e5e8SYazen Ghannam 17e6e6e5e8SYazen Ghannam #ifndef _ASM_X86_AMD_NODE_H_ 18e6e6e5e8SYazen Ghannam #define _ASM_X86_AMD_NODE_H_ 19e6e6e5e8SYazen Ghannam 20e6e6e5e8SYazen Ghannam #include <linux/pci.h> 21e6e6e5e8SYazen Ghannam 22e6e6e5e8SYazen Ghannam #define MAX_AMD_NUM_NODES 8 23e6e6e5e8SYazen Ghannam #define AMD_NODE0_PCI_SLOT 0x18 24e6e6e5e8SYazen Ghannam 25e6e6e5e8SYazen Ghannam struct pci_dev *amd_node_get_func(u16 node, u8 func); 2640a5f6ffSYazen Ghannam struct pci_dev *amd_node_get_root(u16 node); 27e6e6e5e8SYazen Ghannam 28bc7b2e62SYazen Ghannam static inline u16 amd_num_nodes(void) 29bc7b2e62SYazen Ghannam { 30bc7b2e62SYazen Ghannam return topology_amd_nodes_per_pkg() * topology_max_packages(); 31bc7b2e62SYazen Ghannam } 32bc7b2e62SYazen Ghannam 33*d6caeafaSMario Limonciello int __must_check amd_smn_read(u16 node, u32 address, u32 *value); 34*d6caeafaSMario Limonciello int __must_check amd_smn_write(u16 node, u32 address, u32 value); 35*d6caeafaSMario Limonciello 36e6e6e5e8SYazen Ghannam #endif /*_ASM_X86_AMD_NODE_H_*/ 37