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53 Commits

Author SHA1 Message Date
Marcelo Araujo
9e59a2e8ce Add a comment explaining how the PSN works and why there is no need for 
a null terminator. Also mark CID 1394825 as intentional.

Reported by:	Coverity
CID:		1394825
MFC after:	1 week
Sponsored by:	iXsystems Inc.
 2018-08-16 06:31:54 +00:00
Marcelo Araujo
e30993c2a6 Increase the mask from 15 to 255 or otherwise NVME_FEAT_SOFTWARE_PROGRESS 
will never be reached.

Discussed with:	Leon Dang and Darius Mihai <dariusmihaim@gmail.com>
MFC after:	1 week.
Sponsored by:	iXsystems Inc.
 2018-08-16 06:20:25 +00:00
Marcelo Araujo
c066c68c57 - Add bhyve NVMe device emulation. 
The initial work on bhyve NVMe device emulation was done by the GSoC student
Shunsuke Mie and was heavily modified in performan, functionality and
guest support by Leon Dang.

bhyve:
	-s <n>,nvme,devpath,maxq=#,qsz=#,ioslots=#,sectsz=#,ser=A-Z

	accepted devpath:
		/dev/blockdev
		/path/to/image
		ram=size_in_MiB

Tested with guest OS: FreeBSD Head, Linux Fedora fc27, Ubuntu 18.04,
                      OpenSuse 15.0, Windows Server 2016 Datacenter.
Tested with all accepted device paths: Real nvme, zdev and also with ram.
Tested on: AMD Ryzen Threadripper 1950X 16-Core Processor and
           Intel(R) Xeon(R) CPU E5-2609 v2 @ 2.50GHz.

Tests at: https://people.freebsd.org/~araujo/bhyve_nvme/nvme.txt

Submitted by:	Shunsuke Mie <sux2mfgj_gmail.com>,
		Leon Dang <leon_digitalmsx.com>
Reviewed by:	chuck (early version), grehan
Relnotes:	Yes
Sponsored by:	iXsystems Inc.
Differential Revision:	https://reviews.freebsd.org/D14022
 2018-07-05 03:33:58 +00:00