From f146c7bc85a51f95c05e0f8173d484eb301ece78 Mon Sep 17 00:00:00 2001 From: Danilo Krummrich Date: Thu, 13 Aug 2026 18:52:04 +0200 Subject: PCI: Add pci_irq_type() to query the allocated interrupt type Add a helper that returns PCI_IRQ_MSIX, PCI_IRQ_MSI, or PCI_IRQ_INTX based on the interrupt type the PCI core selected after pci_alloc_irq_vectors(). Several drivers already open-code this check against pdev->msix_enabled and pdev->msi_enabled, or even open code this helper [1]. A common helper avoids the duplication and keeps drivers from accessing the bitfield directly (see also [2]). Acked-by: Bjorn Helgaas Tested-by: John Hubbard Link: https://elixir.bootlin.com/linux/v7.1/source/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c#L196 [1] Inspired-by: John Hubbard Link: https://lore.kernel.org/all/DKKG2QM3YJYB.Z2H2B2UXJ75N@kernel.org/ [2] Reviewed-by: Gary Guo Link: https://patch.msgid.link/20260813165234.620555-5-dakr@kernel.org [ Add missing pci_irq_type() stub for CONFIG_PCI=n. ] Signed-off-by: Danilo Krummrich --- Documentation/ABI/testing/debugfs-pcie-ptm | 70 ++++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 Documentation/ABI/testing/debugfs-pcie-ptm (limited to 'Documentation/ABI/testing/debugfs-pcie-ptm') diff --git a/Documentation/ABI/testing/debugfs-pcie-ptm b/Documentation/ABI/testing/debugfs-pcie-ptm new file mode 100644 index 000000000..602d41363 --- /dev/null +++ b/Documentation/ABI/testing/debugfs-pcie-ptm @@ -0,0 +1,70 @@ +What: /sys/kernel/debug/pcie_ptm_*/local_clock +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM local clock in nanoseconds. Applicable for both Root + Complex and Endpoint controllers. + +What: /sys/kernel/debug/pcie_ptm_*/master_clock +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM master clock in nanoseconds. Applicable only for + Endpoint controllers. + +What: /sys/kernel/debug/pcie_ptm_*/t1 +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM T1 timestamp in nanoseconds. Applicable only for + Endpoint controllers. + +What: /sys/kernel/debug/pcie_ptm_*/t2 +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM T2 timestamp in nanoseconds. Applicable only for + Root Complex controllers. + +What: /sys/kernel/debug/pcie_ptm_*/t3 +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM T3 timestamp in nanoseconds. Applicable only for + Root Complex controllers. + +What: /sys/kernel/debug/pcie_ptm_*/t4 +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RO) PTM T4 timestamp in nanoseconds. Applicable only for + Endpoint controllers. + +What: /sys/kernel/debug/pcie_ptm_*/context_update +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RW) Control the PTM context update mode. Applicable only for + Endpoint controllers. + + Following values are supported: + + * auto = PTM context auto update trigger for every 10ms + + * manual = PTM context manual update. Writing 'manual' to this + file triggers PTM context update (default) + +What: /sys/kernel/debug/pcie_ptm_*/context_valid +Date: May 2025 +Contact: Manivannan Sadhasivam +Description: + (RW) Control the PTM context validity (local clock timing). + Applicable only for Root Complex controllers. PTM context is + invalidated by hardware if the Root Complex enters low power + mode or changes link frequency. + + Following values are supported: + + * 0 = PTM context invalid (default) + + * 1 = PTM context valid -- cgit v1.3.1