From: Yishai Hadas Date: Mon, 27 Oct 2025 09:34:01 +0000 (+0200) Subject: PCI/TPH: Expose pcie_tph_get_st_table_loc() X-Git-Tag: v6.19-rc1~130^2~48^2~4 X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=7b8a8ec20cfce2298f6737089f5d17407ea346b4;p=thirdparty%2Fkernel%2Flinux.git PCI/TPH: Expose pcie_tph_get_st_table_loc() Expose pcie_tph_get_st_table_loc() to be used by drivers as will be done in the next patch from the series. Signed-off-by: Yishai Hadas Signed-off-by: Edward Srouji Link: https://patch.msgid.link/20251027-st-direct-mode-v1-1-e0ad953866b6@nvidia.com Acked-by: Bjorn Helgaas Signed-off-by: Leon Romanovsky --- diff --git a/drivers/pci/tph.c b/drivers/pci/tph.c index cc64f93709a4f..ca4f97be75389 100644 --- a/drivers/pci/tph.c +++ b/drivers/pci/tph.c @@ -155,7 +155,16 @@ static u8 get_st_modes(struct pci_dev *pdev) return reg; } -static u32 get_st_table_loc(struct pci_dev *pdev) +/** + * pcie_tph_get_st_table_loc - Return the device's ST table location + * @pdev: PCI device to query + * + * Return: + * PCI_TPH_LOC_NONE - Not present + * PCI_TPH_LOC_CAP - Located in the TPH Requester Extended Capability + * PCI_TPH_LOC_MSIX - Located in the MSI-X Table + */ +u32 pcie_tph_get_st_table_loc(struct pci_dev *pdev) { u32 reg; @@ -163,6 +172,7 @@ static u32 get_st_table_loc(struct pci_dev *pdev) return FIELD_GET(PCI_TPH_CAP_LOC_MASK, reg); } +EXPORT_SYMBOL(pcie_tph_get_st_table_loc); /* * Return the size of ST table. If ST table is not in TPH Requester Extended @@ -174,7 +184,7 @@ u16 pcie_tph_get_st_table_size(struct pci_dev *pdev) u32 loc; /* Check ST table location first */ - loc = get_st_table_loc(pdev); + loc = pcie_tph_get_st_table_loc(pdev); /* Convert loc to match with PCI_TPH_LOC_* defined in pci_regs.h */ loc = FIELD_PREP(PCI_TPH_CAP_LOC_MASK, loc); @@ -299,7 +309,7 @@ int pcie_tph_set_st_entry(struct pci_dev *pdev, unsigned int index, u16 tag) */ set_ctrl_reg_req_en(pdev, PCI_TPH_REQ_DISABLE); - loc = get_st_table_loc(pdev); + loc = pcie_tph_get_st_table_loc(pdev); /* Convert loc to match with PCI_TPH_LOC_* */ loc = FIELD_PREP(PCI_TPH_CAP_LOC_MASK, loc); diff --git a/include/linux/pci-tph.h b/include/linux/pci-tph.h index 9e4e331b16033..ba28140ce6707 100644 --- a/include/linux/pci-tph.h +++ b/include/linux/pci-tph.h @@ -29,6 +29,7 @@ int pcie_tph_get_cpu_st(struct pci_dev *dev, 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); #else static inline int pcie_tph_set_st_entry(struct pci_dev *pdev, unsigned int index, u16 tag)