archive mirror
 help / color / mirror / Atom feed
From: Thierry Reding <>
To: Bjorn Helgaas <>
Cc: Arnd Bergmann <>,,
Subject: [RFC 0/2] PCI: Introduce MSI chip infrastructure
Date: Fri, 22 Mar 2013 09:51:45 +0100	[thread overview]
Message-ID: <> (raw)

This pair of patches introduces a new MSI chip infrastructure aimed at
replacing the current per-architecture implementation of the MSI support
functions. The rationale being that for multi-platform support on ARM
(and of course other architectures as well) per-architecture hooks no
longer work, given that more than one implementation will be provided.

The approach chosen in this patch series is to introduce a new structure
called struct msi_chip that contains pointers to the functions that have
previously been implemented on a per-architecture basis. A pointer to
this structure is embedded with each struct pci_bus, similar to struct
pci_ops, and automatically passed to child busses during enumeration. It
is the responsibility of the PCI host bridge driver to setup the MSI
chip for the root bus.

An example for the usage of this new infrastructure is provided in the
second patch, which implements this for the Tegra PCIe controller
driver. Note that this driver has not been merged yet because this MSI
infrastructure is a prerequisite. Nevertheless it should serve as a
reference for implementors on how to use the MSI chip.


Thierry Reding (2):
  PCI: Introduce new MSI chip infrastructure
  PCI: tegra: Use new MSI chip infrastructure

 drivers/pci/host/pci-tegra.c | 105 ++++++++++++++++++++++++-------------------
 drivers/pci/msi.c            |  35 +++++++++++++--
 drivers/pci/probe.c          |   1 +
 include/linux/msi.h          |  10 +++++
 include/linux/pci.h          |   1 +
 5 files changed, 103 insertions(+), 49 deletions(-)


             reply	other threads:[~2013-03-22  8:51 UTC|newest]

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-22  8:51 Thierry Reding [this message]
2013-03-22  8:51 ` [RFC 1/2] PCI: Introduce new MSI chip infrastructure Thierry Reding
2013-03-22  9:37   ` Andrew Murray
2013-03-22 10:00     ` Thierry Reding
2013-03-22  8:51 ` [RFC 2/2] PCI: tegra: Use " Thierry Reding
2013-03-25 17:01   ` Stephen Warren
2013-03-25 20:02     ` Thierry Reding
2013-03-22  9:30 ` [RFC 0/2] PCI: Introduce " Andrew Murray
2013-03-24 11:06   ` Thomas Petazzoni
2013-03-25  7:58     ` Thierry Reding
2013-03-25  8:38       ` Thomas Petazzoni
2013-03-25  9:15         ` Thierry Reding
2013-03-25  9:29           ` Arnd Bergmann

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:

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

  git send-email \ \ \ \ \ \ \

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).