diff options
Diffstat (limited to 'arch/x86/include/asm/amd_node.h')
| -rw-r--r-- | arch/x86/include/asm/amd_node.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/x86/include/asm/amd_node.h b/arch/x86/include/asm/amd_node.h new file mode 100644 index 000000000000..113ad3e8ee40 --- /dev/null +++ b/arch/x86/include/asm/amd_node.h @@ -0,0 +1,36 @@ +/* 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); +struct pci_dev *amd_node_get_root(u16 node); + +static inline u16 amd_num_nodes(void) +{ + return topology_amd_nodes_per_pkg() * topology_max_packages(); +} + +int __must_check amd_smn_read(u16 node, u32 address, u32 *value); +int __must_check amd_smn_write(u16 node, u32 address, u32 value); + +#endif /*_ASM_X86_AMD_NODE_H_*/ |