[PATCH V4 06/12] PCI/TPH: Add pcie_tph_enabled() to check TPH state
From: Wei Huang <hidden>
Date: 2024-08-22 20:42:43
Also in:
linux-doc, linux-pci, lkml
Subsystem:
pci subsystem, the rest · Maintainers:
Bjorn Helgaas, Linus Torvalds
Check if TPH has been enabled on a device. Co-developed-by: Eric Van Tassell <redacted> Signed-off-by: Eric Van Tassell <redacted> Signed-off-by: Wei Huang <redacted> Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com> Reviewed-by: Somnath Kotur <redacted> Reviewed-by: Andy Gospodarek <redacted> --- drivers/pci/pcie/tph.c | 12 ++++++++++++ include/linux/pci-tph.h | 2 ++ 2 files changed, 14 insertions(+)
diff --git a/drivers/pci/pcie/tph.c b/drivers/pci/pcie/tph.c
index 08ce4fdeb160..d949930e7e78 100644
--- a/drivers/pci/pcie/tph.c
+++ b/drivers/pci/pcie/tph.c@@ -40,6 +40,18 @@ static u8 get_rp_completer_type(struct pci_dev *pdev) return FIELD_GET(PCI_EXP_DEVCAP2_TPH_COMP_MASK, reg); } +/** + * pcie_tph_enabled - Check whether TPH is enabled in device + * @pdev: PCI device + * + * Return: true if TPH is enabled, otherwise false + */ +bool pcie_tph_enabled(struct pci_dev *pdev) +{ + return pdev->tph_enabled; +} +EXPORT_SYMBOL(pcie_tph_enabled); + /** * pcie_disable_tph - Turn off TPH support for device * @pdev: PCI device
diff --git a/include/linux/pci-tph.h b/include/linux/pci-tph.h
index 422d395ade68..50e05cdfbc43 100644
--- a/include/linux/pci-tph.h
+++ b/include/linux/pci-tph.h@@ -10,10 +10,12 @@ #define LINUX_PCI_TPH_H #ifdef CONFIG_PCIE_TPH +bool pcie_tph_enabled(struct pci_dev *pdev); void pcie_disable_tph(struct pci_dev *pdev); int pcie_enable_tph(struct pci_dev *pdev, int mode); int pcie_tph_modes(struct pci_dev *pdev); #else +static inline bool pcie_tph_enabled(struct pci_dev *pdev) { return false; } static inline void pcie_disable_tph(struct pci_dev *pdev) { } static inline int pcie_enable_tph(struct pci_dev *pdev, int mode) { return -EINVAL; }
--
2.45.1