Add pcie_tph_enabled_req_type() so drivers can query the enabled TPH requester mode without reaching into pci_dev internals.
This keeps pci_dev::tph_req_type inside the PCI/TPH code and provides a !CONFIG_PCIE_TPH stub for callers. Signed-off-by: Zhiping Zhang <[email protected]> --- drivers/pci/tph.c | 12 ++++++++++++ include/linux/pci-tph.h | 2 ++ 2 files changed, 14 insertions(+) diff --git a/drivers/pci/tph.c b/drivers/pci/tph.c index 91145e8d9d95..6c4492075ae9 100644 --- a/drivers/pci/tph.c +++ b/drivers/pci/tph.c @@ -174,6 +174,18 @@ u32 pcie_tph_get_st_table_loc(struct pci_dev *pdev) } EXPORT_SYMBOL(pcie_tph_get_st_table_loc); +/** + * pcie_tph_enabled_req_type - Return the device's enabled TPH requester type + * @pdev: PCI device to query + * + * Return: PCI_TPH_REQ_DISABLE, PCI_TPH_REQ_TPH_ONLY or PCI_TPH_REQ_EXT_TPH. + */ +u8 pcie_tph_enabled_req_type(struct pci_dev *pdev) +{ + return pdev->tph_req_type; +} +EXPORT_SYMBOL(pcie_tph_enabled_req_type); + /* * Return the size of ST table. If ST table is not in TPH Requester Extended * Capability space, return 0. Otherwise return the ST Table Size + 1. diff --git a/include/linux/pci-tph.h b/include/linux/pci-tph.h index be68cd17f2f8..fe572737b409 100644 --- a/include/linux/pci-tph.h +++ b/include/linux/pci-tph.h @@ -30,6 +30,7 @@ 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); +u8 pcie_tph_enabled_req_type(struct pci_dev *pdev); #else static inline int pcie_tph_set_st_entry(struct pci_dev *pdev, unsigned int index, u16 tag) @@ -41,6 +42,7 @@ static inline int pcie_tph_get_cpu_st(struct pci_dev *dev, static inline void pcie_disable_tph(struct pci_dev *pdev) { } static inline int pcie_enable_tph(struct pci_dev *pdev, int mode) { return -EINVAL; } +static inline u8 pcie_tph_enabled_req_type(struct pci_dev *pdev) { return 0; } #endif #endif /* LINUX_PCI_TPH_H */ -- 2.53.0-Meta
