Add the ability for the NVMe model to support both the RDS and WDS
modes in the Controller Memory Buffer.
Although not currently supported in the upstreamed Linux kernel a fork
with support exists [1] and user-space test programs that build on
this also exist [2].
Useful for testing CMB functionality in preperation for real CMB
enabled NVMe devices (coming soon).
[1] https://github.com/sbates130272/linux-p2pmem
[2] https://github.com/sbates130272/p2pmem-test
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Reviewed-by: Logan Gunthorpe <logang@deltatee.com>
Reviewed-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Implement NVMe Controller Memory Buffers (CMBs) which were added in
version 1.2 of the NVMe Specification. This patch adds an optional
argument (cmb_size_mb) which indicates the size of the CMB (in
MB). Currently only the Submission Queue Support (SQS) is enabled
which aligns with the current Linux driver for NVMe.
Signed-off-by: Stephen Bates <sbates@raithlin.com>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
[hch: ported over from qemu-nvme.git to mainline]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Move declarations out of qemu-common.h for functions declared in
utils/ files: e.g. include/qemu/path.h for utils/path.c.
Move inline functions out of qemu-common.h and into new files (e.g.
include/qemu/bcd.h)
Signed-off-by: Veronia Bahaa <veroniabahaa@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Implement a real flush instead of faking it. This is especially important
as Qemu assume Write back cashing by default and thus requires a working
cache flush operation for data integrity.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Keith Busch <keith.busch@intel.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Initialise our maximum page size capability to 64kB and increase
the page_size variable from 16 to 32 bits.
Signed-off-by: Anton Blanchard <anton@samba.org>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
I'll use BlockDriverAIOCB with block backends shortly, and the name is
going to fit badly there. It's a block layer thing anyway, not just a
block driver thing.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Max Reitz <mreitz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Initial commit for emulated Non-Volatile-Memory Express (NVMe) pci
storage device.
NVMe is an open, industry driven storage specification defining
an optimized register and command set designed to deliver the full
capabilities of non-volatile memory on PCIe SSDs. Further information
may be found on the organizations website at:
http://www.nvmexpress.org/
This commit implements the minimum from the specification to work with
existing drivers.
Cc: Keith Busch <keith.busch@gmail.com>
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Stefan Hajnoczi <stefanha@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
