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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 22 Aug 2024 20:42:37.2550 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 592de166-6ff1-40dd-d62e-08dcc2eaf54e X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000075ED.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SJ0PR12MB6967 Check if TPH has been enabled on a device. Co-developed-by: Eric Van Tassell Signed-off-by: Eric Van Tassell Signed-off-by: Wei Huang Reviewed-by: Ajit Khaparde Reviewed-by: Somnath Kotur Reviewed-by: Andy Gospodarek --- 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; }