linux-kernel - [PATCH v6 0/3] PCI: Precision Time Measurement support

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Date:	Mon, 13 Jun 2016 14:05:26 -0500
From:	Bjorn Helgaas <bhelgaas@...gle.com>
To:	Jonathan Yong <jonathan.yong@...el.com>
Cc:	linux-pci@...r.kernel.org, intel-wired-lan@...ts.osuosl.org,
	Jeff Kirsher <jeffrey.t.kirsher@...el.com>,
	linux-kernel@...r.kernel.org
Subject: [PATCH v6 0/3] PCI: Precision Time Measurement support

This is a slightly different proposal for the PTM support Jonathan
proposed here:

  http://lkml.kernel.org/r/1462956446-27361-2-git-send-email-jonathan.yong@intel.com

I split this into three pieces mostly for ease in reviewing.  They
could all be squashed:

  - Enable PTM in root ports and switches automatically at boot
  - Enable PTM in endpoints when requested by driver
  - Add clock granularity information

I have some open questions about how PTM works on Root Complex
Integrated Endpoints and whether we should enable it automatically
even without a driver request.  And I probably left out some details
of the clock granularity computation, so treat this as more of an RFC
than anything.

Bjorn

---

Bjorn Helgaas (2):
      PCI: Add pci_enable_ptm() for drivers to enable PTM on endpoints
      PCI: Add PTM clock granularity information

Jonathan Yong (1):
      PCI: Add Precision Time Measurement (PTM) support


 drivers/pci/pci.h             |    6 ++
 drivers/pci/pcie/Kconfig      |   12 ++++
 drivers/pci/pcie/Makefile     |    1 
 drivers/pci/pcie/ptm.c        |  140 +++++++++++++++++++++++++++++++++++++++++
 drivers/pci/probe.c           |    3 +
 include/linux/pci.h           |   13 ++++
 include/uapi/linux/pci_regs.h |   12 +++-
 7 files changed, 186 insertions(+), 1 deletion(-)
 create mode 100644 drivers/pci/pcie/ptm.c