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(I'm so sorry!) Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel os linux
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1234567891011121314151617181920212223242526272829303132333435363738394041424344454647/* SPDX-License-Identifier: GPL-2.0 *//* * TPH (TLP Processing Hints) * * Copyright (C) 2024 Advanced Micro Devices, Inc. * Eric Van Tassell <Eric.VanTassell@amd.com> * Wei Huang <wei.huang2@amd.com> */#ifndef LINUX_PCI_TPH_H#define LINUX_PCI_TPH_H
/* * According to the ECN for PCI Firmware Spec, Steering Tag can be different * depending on the memory type: Volatile Memory or Persistent Memory. When a * caller query about a target's Steering Tag, it must provide the target's * tph_mem_type. ECN link: https://members.pcisig.com/wg/PCI-SIG/document/15470. */enum tph_mem_type { TPH_MEM_TYPE_VM, /* volatile memory */ TPH_MEM_TYPE_PM /* persistent memory */};
#ifdef CONFIG_PCIE_TPHint pcie_tph_set_st_entry(struct pci_dev *pdev, unsigned int index, u16 tag);int pcie_tph_get_cpu_st(struct pci_dev *dev, enum tph_mem_type mem_type, unsigned int cpu, u16 *tag);void pcie_disable_tph(struct pci_dev *pdev);int pcie_enable_tph(struct pci_dev *pdev, int mode);u16 pcie_tph_get_st_table_size(struct pci_dev *pdev);u32 pcie_tph_get_st_table_loc(struct pci_dev *pdev);#elsestatic inline int pcie_tph_set_st_entry(struct pci_dev *pdev, unsigned int index, u16 tag){ return -EINVAL; }static inline int pcie_tph_get_cpu_st(struct pci_dev *dev, enum tph_mem_type mem_type, unsigned int cpu, u16 *tag){ return -EINVAL; }static inline void pcie_disable_tph(struct pci_dev *pdev) { }static inline int pcie_enable_tph(struct pci_dev *pdev, int mode){ return -EINVAL; }#endif
#endif /* LINUX_PCI_TPH_H */