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 <[e-mail]>
Signed-off-by: Edward Srouji <[e-mail]>
Link: https://patch.msgid.link/[e-mail]
Acked-by: Bjorn Helgaas <[e-mail]>
Signed-off-by: Leon Romanovsky <[e-mail]>

drivers/pci/tph.c

···
 	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;
 
···
 
 	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
···
 	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);
···
 	 */
 	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);
 

include/linux/pci-tph.h

···
 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)