I guess the obvious questions is: why is a driver for a PCI switch necessary? The core works with all compliant switches today and there are no specifics for a particular design or such. So I guess I'd like to hear the reasoning and justifications for why a driver for a common device that should conform to the specifications and not seem to need any special considerations is required or desired here. On Sat, Dec 17, 2016 at 10:09 AM, Logan Gunthorpe <logang@xxxxxxxxxxxx> wrote: > Hi, > > [Appologies: this is a resend for some people. Due to a configuration > error the original email was rejected by the mailing lists. I hope > this one makes it!] > > We're looking to get some initial feedback on a new driver for > a line of PCIe switches produced and produced and sold by Microsemi. > The goal is to get the process moving to get this code included in > upstream hopefully for 4.11. Facebook is currently gearing up to > use this hardware in its Open Compute Platform and is pushing to > have this driver in the upstream kernel. > > The following patch briefly describes the hardware and provides > the first draft of driver code. Currently, the driver works and > has been tested but is not feature complete. Thus, we are not looking > to get it merged immediately. However we would like some early review, > specifically on the interfaces and core concepts so that we don't > do a lot of work down a path the community would reject. Barring any > objections to this RFC, we will flesh out all the features > and provide a completed patch for inclusion in the coming weeks. > > Work on a userspace tool, that utilizes this driver, is also being > done at [1]. The tool is currently also a bit of a skeleton and > will be fleshed out assuming there are no serious objections to our > userspace interface. In the end, the tool will be released with a > GPL license. > > The patch is based off of the v4.9 release. > > Thanks for your review, > > Logan > > [1] https://github.com/sbates130272/switchtec-user > > Logan Gunthorpe (1): > MicroSemi Switchtec management interface driver > > Documentation/switchtec.txt | 54 +++ > MAINTAINERS | 9 + > drivers/pci/Kconfig | 1 + > drivers/pci/Makefile | 1 + > drivers/pci/switch/Kconfig | 13 + > drivers/pci/switch/Makefile | 1 + > drivers/pci/switch/switchtec.c | 824 +++++++++++++++++++++++++++++++++++++++++ > drivers/pci/switch/switchtec.h | 119 ++++++ > 8 files changed, 1022 insertions(+) > create mode 100644 Documentation/switchtec.txt > create mode 100644 drivers/pci/switch/Kconfig > create mode 100644 drivers/pci/switch/Makefile > create mode 100644 drivers/pci/switch/switchtec.c > create mode 100644 drivers/pci/switch/switchtec.h > > -- > 2.1.4 > -- > To unsubscribe from this list: send the line "unsubscribe linux-pci" in > the body of a message to majordomo@xxxxxxxxxxxxxxx > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-pci" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
