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This is the prerequisite modification to the ipoib ulp to allow a rdma netdev to obtain the default ndo ops for init/uninit/open/close. This is accomplished by setting the netdev ops field within the callback function passed to the netdev allocation routine which in turn was passed into the rdma netdev allocation routine. This allows the rdma netdev to call back into the ulp to create the resources required for connected mode operation. Additionally as the ulp is not re-entrant, when switching modes, the number of real tx queues is set to 1 for the connected mode. For datagram mode the number of real tx queues is set to the actual number of tx queues specified at the netdev's allocation. For the internal ulp netdev the number of tx queues defaults to 1. It is up to the rdma netdev to specify the actual number it can support. When the driver does not support a rdma netdev for acceleration, (-ENOTSUPPORTED return code or the verbs function for allocation is NULL) the ipoib ulp functions are unaffected by using the internal netdev allocated by the ipoib ulp. Link: https://lore.kernel.org/r/20200511160706.173205.19086.stgit@awfm-01.aw.intel.com Reviewed-by: Mike Marciniszyn <mike.marciniszyn@intel.com> Reviewed-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Gary Leshner <Gary.S.Leshner@intel.com> Signed-off-by: Kaike Wan <kaike.wan@intel.com> Signed-off-by: Dennis Dalessandro <dennis.dalessandro@intel.com> Signed-off-by: Jason Gunthorpe <jgg@mellanox.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.