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From: Dongdong Liu <liudongdong3@huawei.com>
To: <helgaas@kernel.org>, <linux-pci@vger.kernel.org>
Subject: [RFC PATCH 0/3] PCI: Enable 10-bit tags support for PCIe devices
Date: Sat, 9 Jan 2021 17:11:20 +0800	[thread overview]
Message-ID: <1610183483-2061-1-git-send-email-liudongdong3@huawei.com> (raw)

10-Bit Tag capability, introduced in PCIe-4.0 increases the total Tag
field size from 8 bits to 10 bits.

For platforms where the RC supports 10-Bit Tag Completer capability,
it is highly recommended for platform firmware or operating software
that configures PCIe hierarchies to Set the 10-Bit Tag Requester Enable
bit automatically in Endpoints with 10-Bit Tag Requester capability. This
enables the important class of 10-Bit Tag capable adapters that send
Memory Read Requests only to host memory.

This patchset is to enable 10-bits for PCIe EP devices.

Dongdong Liu (3):
  PCI: Add 10-Bit Tag register definitions
  PCI: Enable 10-bit tags support for PCIe devices
  PCI/IOV: Enable 10-bit tags support for PCIe VF devices

 drivers/pci/iov.c             |  8 ++++++++
 drivers/pci/probe.c           | 39 +++++++++++++++++++++++++++++++++++++++
 include/linux/pci.h           |  1 +
 include/uapi/linux/pci_regs.h |  5 +++++
 4 files changed, 53 insertions(+)

--
1.9.1


             reply	other threads:[~2021-01-09  9:40 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-09  9:11 Dongdong Liu [this message]
2021-01-09  9:11 ` [RFC PATCH 1/3] PCI: Add 10-Bit Tag register definitions Dongdong Liu
2021-01-09  9:11 ` [RFC PATCH 2/3] PCI: Enable 10-bit tags support for PCIe devices Dongdong Liu
2021-01-09  9:11 ` [RFC PATCH 3/3] PCI/IOV: Enable 10-bit tags support for PCIe VF devices Dongdong Liu
2021-02-09 13:18 ` [RFC PATCH 0/3] PCI: Enable 10-bit tags support for PCIe devices Dongdong Liu

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