Linux-PCI Archive on lore.kernel.org
 help / color / Atom feed
From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
To: linux-pci@vger.kernel.org
Cc: devicetree@vger.kernel.org, mw@semihalf.com,
	Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Leif Lindholm <leif.lindholm@linaro.org>,
	Graeme Gregory <graeme.gregory@linaro.org>,
	Bjorn Helgaas <bhelgaas@google.com>,
	Jingoo Han <jingoohan1@gmail.com>,
	Joao Pinto <Joao.Pinto@synopsys.com>,
	Rob Herring <robh@kernel.org>
Subject: [PATCH v3 0/2] pci: add support for firmware initialized designware RCs
Date: Mon, 28 Aug 2017 19:04:35 +0100
Message-ID: <20170828180437.2646-1-ard.biesheuvel@linaro.org> (raw)

UEFI based systems incorporating a Synopsys Designware PCIe controller
in RC mode will typically configure it before entering the OS. If this
configuration is fully static and ECAM compliant, there is no need to
expose particulars of the device to the OS, and we can simply describe
it as "pci-host-ecam-generic".

However, the Synopsys IP may be synthesized in a way where a quirk is
needed for config space accesses to the first bus. It makes little sense
to instantiate yet another pcie-designware driver that contains all the
low level setup code, but it is also not justified to add quirks handling
to the generic ECAM driver.

So instead, create a variant of the generic ECAM driver that filters config
space accesses directed at device #1 and up on the first bus.

v3: - use SoC specific compatible strings
    - drop MSI patch [for now], since it turns out we may not need it

v2: - use dev->fwnode directly
    - replace an instance of pr_err with dev_err, and clarify the error message
    - fix Kconfig/Makefile dependency errors reported by kbuild

Cc: Leif Lindholm <leif.lindholm@linaro.org>
Cc: Graeme Gregory <graeme.gregory@linaro.org>
Cc: Bjorn Helgaas <bhelgaas@google.com>
Cc: Jingoo Han <jingoohan1@gmail.com>
Cc: Joao Pinto <Joao.Pinto@synopsys.com>
Cc: Rob Herring <robh@kernel.org>

Ard Biesheuvel (2):
  pci: designware: add driver for DWC controller in ECAM shift mode
  dt-bindings: designware: add binding for Designware PCIe in ECAM mode

 Documentation/devicetree/bindings/pci/designware-pcie-ecam.txt | 42 +++++++++++
 drivers/pci/dwc/Kconfig                                        | 11 +++
 drivers/pci/dwc/Makefile                                       |  1 +
 drivers/pci/dwc/pcie-designware-ecam.c                         | 77 ++++++++++++++++++++
 4 files changed, 131 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pci/designware-pcie-ecam.txt
 create mode 100644 drivers/pci/dwc/pcie-designware-ecam.c

-- 
2.11.0

             reply index

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-08-28 18:04 Ard Biesheuvel [this message]
2017-08-28 18:04 ` [PATCH v3 1/2] pci: designware: add driver for DWC controller in ECAM shift mode Ard Biesheuvel
2017-09-26 17:32   ` Bjorn Helgaas
2017-09-28  9:03     ` Will Deacon
2017-09-28 15:57       ` Ard Biesheuvel
2017-09-28 16:00         ` Will Deacon
2017-09-28 16:04           ` Ard Biesheuvel
2017-09-28 15:51     ` Ard Biesheuvel
2017-09-28 17:48       ` Bjorn Helgaas
2017-09-28 18:33         ` Ard Biesheuvel
2017-09-29  3:29         ` Jingoo Han
2017-10-06 14:52       ` Ard Biesheuvel
2017-10-06 22:45         ` Bjorn Helgaas
2017-10-06 23:10           ` Ard Biesheuvel
2017-08-28 18:04 ` [PATCH v3 2/2] dt-bindings: designware: add binding for Designware PCIe in ECAM mode Ard Biesheuvel
2017-08-31 14:23   ` Rob Herring
2017-08-29 15:40 ` [PATCH v3 0/2] pci: add support for firmware initialized designware RCs Marcin Wojtas

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20170828180437.2646-1-ard.biesheuvel@linaro.org \
    --to=ard.biesheuvel@linaro.org \
    --cc=Joao.Pinto@synopsys.com \
    --cc=bhelgaas@google.com \
    --cc=devicetree@vger.kernel.org \
    --cc=graeme.gregory@linaro.org \
    --cc=jingoohan1@gmail.com \
    --cc=leif.lindholm@linaro.org \
    --cc=linux-pci@vger.kernel.org \
    --cc=mw@semihalf.com \
    --cc=robh@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Linux-PCI Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/linux-pci/0 linux-pci/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 linux-pci linux-pci/ https://lore.kernel.org/linux-pci \
		linux-pci@vger.kernel.org
	public-inbox-index linux-pci

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.kernel.vger.linux-pci


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git