Commit Graph

4 Commits

Author SHA1 Message Date
Enji Cooper
193d9e768b sys/modules: normalize .CURDIR-relative paths to SRCTOP
This simplifies make output/logic

Tested with:	`cd sys/modules; make ALL_MODULES=` on amd64
MFC after:	1 month
Sponsored by:	Dell EMC Isilon
2017-03-04 10:10:17 +00:00
Dexuan Cui
8c582c7c58 hyperv/pcib: change the file name: pcib.c -> vmbus_pcib.c
This makes the file name and the variable naming in the file consistent.

Reviewed by:	sephe
Approved by:	sephe (mentor)
MFC after:	1 week
Sponsored by:	Microsoft
2016-11-18 06:44:18 +00:00
Dexuan Cui
531582f5a9 hyperv/pcib: Fix the build for some kernel configs
Add the dependency on pci explicitly for the pcib and vmbus drivers.
The related Makefiles are updated accordingly too.

Reviewed by:	sephe
Approved by:	sephe (mentor)
MFC after:	1 week
Sponsored by:	Microsoft
2016-11-18 05:33:01 +00:00
Dexuan Cui
871c968b3a hyperv/pcib: enable PCIe pass-through (a.k.a. Discrete Device Assignment)
The feature enables us to pass through physical PCIe devices to FreeBSD VM
running on Hyper-V (Windows Server 2016) to get near-native performance with
low CPU utilization.

The patch implements a PCI bridge driver to support the feature:

1) The pcib driver talks to the host to discover device(s) and presents
the device(s) to FreeBSD's pci driver via PCI configuration space (note:
to access the configuration space, we don't use the standard I/O port
0xCF8/CFC method; instead, we use an MMIO-based method supplied by Hyper-V,
which is very similar to the 0xCF8/CFC method).

2) The pcib driver allocates resources for the device(s) and initialize
the related BARs, when the device driver's attach method is invoked;

3) The pcib driver talks to the host to create MSI/MSI-X interrupt
remapping between the guest and the host;

4) The pcib driver supports device hot add/remove.

Reviewed by:	sephe
Approved by:	sephe (mentor)
MFC after:	1 week
Sponsored by:	Microsoft
Differential Revision:	https://reviews.freebsd.org/D8332
2016-11-16 09:25:00 +00:00