Hello,

The VCM is a framework to deal with multiple IOMMUs in a system 
with intuitive and abstract objects
These patches are the bugfix and enhanced version of previous RFC by Michal 
Nazarewicz.
(https://patchwork.kernel.org/patch/157451/)

It is introduced by Zach Pfeffer and implemented by Michal Nazarewicz.
These patches include entirely new implementation of VCM than the one submitted 
by Zach Pfeffer.

The prerequisites of these patches are the followings by Michal Nazarewicz:
https://patchwork.kernel.org/patch/340281/
https://patchwork.kernel.org/patch/414381/
https://patchwork.kernel.org/patch/414541/

In addition to the above patches, 
the prerequisites of "[RFCv2,7/8] mm: vcm: vcm-cma: VCM CMA driver added" is
CMA RFCv8 introduced by Michal Nazarewicz:
https://patchwork.kernel.org/patch/414351/

The VCM also works correctly without "[RFC,6/7] mm: vcm: vcm-cma: VCM CMA 
driver added"

The last patch, "[RFC,7/7] mm: vcm: Sample driver added" is not the one to be 
submitted
but is an example to show how to use the VCM.

The VCM provides generic interfaces and objects to deal with IOMMUs in various 
architectures
especially the ones that embed multiple IOMMUs including GART.

Chagelog:
v2:  1. Added reference counting on a reservation.
        When vcm_reserve() creates a reservation, it sets the reference counter
        of the reservation to 1. The ownership of the reservation is only owned 
by
        the caller of vcm_reserve. If the caller passes the reservation to 
another
        callee functions, the callee functions must increment the reference 
counter
        with vcm_ref_reserve() to set the ownership of the reservation.
        To release the ownership, just call vcm_unreserve(). vcm_unreserve 
decrements
        the reference counter of the given reservation. vcm_unreserve() 
eventually
        unreserves the reservation when its reference counter becomes 0.
     2. Applied the design changes of CMA by Michal Nazarewicz.
        Since it is dramatically changed, vcm-cma also followed.

Patch list:
[RFCv2,1/8] mm: vcm: Virtual Contiguous Memory framework added
[RFCv2,2/8] mm: vcm: reference counting on a reservation added
[RFCv2,3/8] mm: vcm: physical memory allocator added
[RFCv2,4/8] mm: vcm: VCM VMM driver added
[RFCv2,5/8] mm: vcm: VCM MMU wrapper added
[RFCv2,6/8] mm: vcm: VCM One-to-One wrapper added
[RFCv2,7/8] mm: vcm: vcm-cma: VCM CMA driver added
[RFCv2,8/8] mm: vcm: Sample driver added

Summery:
Documentation/00-INDEX                      |    2 +
Documentation/virtual-contiguous-memory.txt |  940 +++++++++++++++++++++++++
include/linux/vcm-cma.h                     |   38 +
include/linux/vcm-drv.h                     |  326 +++++++++
include/linux/vcm-sample.h                  |   30 +
include/linux/vcm.h                         |  311 +++++++++
mm/Kconfig                                  |   79 +++
mm/Makefile                                 |    3 +
mm/vcm-cma.c                                |   99 +++
mm/vcm-sample.c                             |  119 ++++
mm/vcm.c                                    |  987 +++++++++++++++++++++++++++
11 files changed, 2934 insertions(+), 0 deletions(-)
create mode 100644 Documentation/virtual-contiguous-memory.txt
create mode 100644 include/linux/vcm-cma.h
create mode 100644 include/linux/vcm-drv.h
create mode 100644 include/linux/vcm-sample.h
create mode 100644 include/linux/vcm.h
create mode 100644 mm/vcm-cma.c
create mode 100644 mm/vcm-sample.c
create mode 100644 mm/vcm.c

--
To unsubscribe from this list: send the line "unsubscribe linux-media" in
the body of a message to majord...@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Reply via email to