On Thu, 1 Oct 2020 15:55:08 -0700, Narcisa Ana Maria Vasile wrote: > From: Narcisa Vasile <navas...@microsoft.com> > > The Windows netuio kernel driver provides the DPDK userspace application > with direct access to hardware, by mapping the HW registers in userspace > and allowing read/write operations from/to the device > configuration space. > > Two IOCTLs are defined by the netuio interface: > * IOCTL_NETUIO_MAP_HW_INTO_USERSPACE > - used for mapping the device registers into userspace > * IOCTL_NETUIO_PCI_CONFIG_IO > - used to read/write from/into the device configuration space > > Note: > Requests to map the device BARs into userspace need to be processed > in the thread context of the process that initiated the mapping request. > Otherwise, the BARs might end up mapped into an arbitrary process > address space. > EvtIoInCallerContext is used to ensure the requests are handled > in the right user thread context. Other requests (PCI config) > are sent back to the framework and processed by the EvtIoDeviceControl > callback. > > Cc: Harini Ramakrishnan <harini.ramakrish...@microsoft.com> > Cc: Omar Cardona <ocard...@microsoft.com> > Cc: Dmitry Malloy <dmit...@microsoft.com> > Signed-off-by: Narcisa Vasile <navas...@microsoft.com>
Reviewed-by: Dmitry Kozlyuk <dmitry.kozl...@gmail.com>
