netdev - [PATCH mlx5-next 1/2] PCI/TPH: Expose pcie_tph_get_st_table

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Message-ID: <20251027-st-direct-mode-v1-1-e0ad953866b6@nvidia.com>
Date: Mon, 27 Oct 2025 11:34:01 +0200
From: Leon Romanovsky <leon@...nel.org>
To: Bjorn Helgaas <bhelgaas@...gle.com>,
	Saeed Mahameed <saeedm@...dia.com>,
	Leon Romanovsky <leon@...nel.org>,
	Tariq Toukan <tariqt@...dia.com>,
	Mark Bloch <mbloch@...dia.com>,
	Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>,
	Paolo Abeni <pabeni@...hat.com>
Cc: linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	linux-rdma@...r.kernel.org,
	Yishai Hadas <yishaih@...dia.com>,
	Edward Srouji <edwards@...dia.com>
Subject: [PATCH mlx5-next 1/2] PCI/TPH: Expose pcie_tph_get_st_table_loc()

From: Yishai Hadas <yishaih@...dia.com>

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 <yishaih@...dia.com>
Signed-off-by: Edward Srouji <edwards@...dia.com>
Signed-off-by: Leon Romanovsky <leonro@...dia.com>
---
 drivers/pci/tph.c       | 7 ++++---
 include/linux/pci-tph.h | 1 +
 2 files changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/pci/tph.c b/drivers/pci/tph.c
index cc64f93709a4..8f8457ec9adb 100644
--- a/drivers/pci/tph.c
+++ b/drivers/pci/tph.c
@@ -155,7 +155,7 @@ static u8 get_st_modes(struct pci_dev *pdev)
 	return reg;
 }
 
-static u32 get_st_table_loc(struct pci_dev *pdev)
+u32 pcie_tph_get_st_table_loc(struct pci_dev *pdev)
 {
 	u32 reg;
 
@@ -163,6 +163,7 @@ 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 +175,7 @@ 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 +300,7 @@ 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 9e4e331b1603..ba28140ce670 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)

-- 
2.51.0