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From: Jonathan Cameron <Jonathan.Cameron@huawei.com>
To: <linux-cxl@vger.kernel.org>, <linux-pci@vger.kernel.org>,
	Ben Widawsky <ben.widawsky@intel.com>,
	Bjorn Helgaas <helgaas@kernel.org>
Cc: Chris Browy <cbrowy@avery-design.com>,
	Dan Williams <dan.j.williams@intel.com>,
	<linux-acpi@vger.kernel.org>, <alison.schofield@intel.com>,
	<vishal.l.verma@intel.com>, <ira.weiny@intel.com>,
	Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
	<linuxarm@huawei.com>, Fangjian <f.fangjian@huawei.com>,
	Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: [RFC PATCH 0/2] PCI Data Object Exchange support + CXL CDAT
Date: Thu, 11 Mar 2021 02:03:04 +0800
Message-ID: <20210310180306.1588376-1-Jonathan.Cameron@huawei.com> (raw)

Series first introduces generic support for DOE mailboxes as defined
in the ECN to the PCI 5.0 specification available from the PCI SIG [0]

A user is then introduced in the form of the table access protocol defined
in the CXL 2.0 specification [1] used to access the
Coherent Device Attribtue Table (CDAT) defined in [2]

Various open questions in the individual patches.

All testing conducted against QEMU emulation of a CXL type 3 device
in conjunction with DOE mailbox patches [3, 4]

[0] https://pcisig.com/specifications
[1] https://www.computeexpresslink.org/download-the-specification
[2] https://uefi.org/node/4093
[3] https://lore.kernel.org/qemu-devel/20210202005948.241655-1-ben.widawsky@intel.com/
[4] https://lore.kernel.org/qemu-devel/1612900760-7361-1-git-send-email-cbrowy@avery-design.com/

Jonathan Cameron (2):
  PCI/doe: Initial support PCI Data Object Exchange
  cxl/mem: Add CDAT table reading from DOE

 drivers/cxl/cdat.h            |  79 ++++++++++
 drivers/cxl/cxl.h             |  13 ++
 drivers/cxl/mem.c             | 253 +++++++++++++++++++++++++++++-
 drivers/pci/pcie/Kconfig      |   8 +
 drivers/pci/pcie/Makefile     |   1 +
 drivers/pci/pcie/doe.c        | 284 ++++++++++++++++++++++++++++++++++
 include/linux/pcie-doe.h      |  35 +++++
 include/uapi/linux/pci_regs.h |  29 +++-
 8 files changed, 700 insertions(+), 2 deletions(-)
 create mode 100644 drivers/cxl/cdat.h
 create mode 100644 drivers/pci/pcie/doe.c
 create mode 100644 include/linux/pcie-doe.h

-- 
2.19.1


             reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-03-10 18:03 Jonathan Cameron [this message]
2021-03-10 18:03 ` [RFC PATCH 1/2] PCI/doe: Initial support PCI Data Object Exchange Jonathan Cameron
2021-03-15 19:45   ` Dan Williams
2021-03-16 16:29     ` Jonathan Cameron
2021-03-16 16:57       ` Jonathan Cameron
2021-03-16 18:14       ` Dan Williams
2021-03-16 23:26         ` Chris Browy
2021-03-18  1:30           ` Dan Williams
2021-03-18 14:25             ` Jonathan Cameron
2021-06-17 17:12               ` Jonathan Cameron
2021-06-17 19:48                 ` Chris Browy
2021-03-23 18:22         ` Jonathan Cameron
2021-03-23 18:57           ` Dan Williams
2021-03-10 18:03 ` [RFC PATCH 2/2] cxl/mem: Add CDAT table reading from DOE Jonathan Cameron
2021-03-10 18:14   ` Jonathan Cameron
2021-03-10 22:59     ` Chris Browy
2021-03-15 22:00     ` Dan Williams
2021-03-16 10:36       ` Jonathan Cameron
2021-03-17  1:42         ` Dan Williams
2021-03-17  1:55   ` Dan Williams

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