Re: [PATCH next-queue v4 2/4] PCI: Add pcie_ptm_enabled()
From: Bjorn Helgaas <helgaas@kernel.org>
Date: 2021-06-04 22:27:16
Also in:
intel-wired-lan, linux-pci
On Fri, Jun 04, 2021 at 03:09:31PM -0700, Vinicius Costa Gomes wrote:
Adds a predicate that returns if PCIe PTM (Precision Time Measurement) is enabled.
Ideally, "Add a predicate ..."
It will only return true if it's enabled in all the ports in the path from the device to the root. Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
But either way, Acked-by: Bjorn Helgaas <bhelgaas@google.com>
quoted hunk ↗ jump to hunk
--- drivers/pci/pcie/ptm.c | 9 +++++++++ include/linux/pci.h | 3 +++ 2 files changed, 12 insertions(+)diff --git a/drivers/pci/pcie/ptm.c b/drivers/pci/pcie/ptm.c index 95d4eef2c9e8..8a4ad974c5ac 100644 --- a/drivers/pci/pcie/ptm.c +++ b/drivers/pci/pcie/ptm.c@@ -204,3 +204,12 @@ int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) return 0; } EXPORT_SYMBOL(pci_enable_ptm); + +bool pcie_ptm_enabled(struct pci_dev *dev) +{ + if (!dev) + return false; + + return dev->ptm_enabled; +} +EXPORT_SYMBOL(pcie_ptm_enabled);diff --git a/include/linux/pci.h b/include/linux/pci.h index a687dda262dd..fe7f264b2b15 100644 --- a/include/linux/pci.h +++ b/include/linux/pci.h@@ -1619,9 +1619,12 @@ bool pci_ats_disabled(void); #ifdef CONFIG_PCIE_PTM int pci_enable_ptm(struct pci_dev *dev, u8 *granularity); +bool pcie_ptm_enabled(struct pci_dev *dev); #else static inline int pci_enable_ptm(struct pci_dev *dev, u8 *granularity) { return -EINVAL; } +static inline bool pcie_ptm_enabled(struct pci_dev *dev) +{ return false; } #endif void pci_cfg_access_lock(struct pci_dev *dev);-- 2.31.1