lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Message-ID: <YzHmn/ClnFX3vRX7@nvidia.com> Date: Mon, 26 Sep 2022 14:51:27 -0300 From: Jason Gunthorpe <jgg@...dia.com> To: Christian König <christian.koenig@....com>, dri-devel@...ts.freedesktop.org, Leon Romanovsky <leon@...nel.org>, linaro-mm-sig@...ts.linaro.org, linux-media@...r.kernel.org, linux-rdma@...r.kernel.org, netdev@...r.kernel.org, Saeed Mahameed <saeedm@...dia.com>, Sumit Semwal <sumit.semwal@...aro.org> Cc: Kamal Heib <kamalheib1@...il.com>, Mohammad Kabat <mohammadkab@...dia.com> Subject: Re: [PATCH 0/4] RDMA/mlx5: Support DMABUF in umems and enable ATS On Thu, Sep 01, 2022 at 11:20:52AM -0300, Jason Gunthorpe wrote: > This series adds support for DMABUF when creating a devx umem. devx umems > are quite similar to MR's execpt they cannot be revoked, so this uses the > dmabuf pinned memory flow. Several mlx5dv flows require umem and cannot > work with MR. > > The intended use case is primarily for P2P transfers using dmabuf as a > handle to the underlying PCI BAR memory from the exporter. When a PCI > switch is present the P2P transfers can bypass the host bridge completely > and go directly through the switch. ATS allows this bypass to function in > more cases as translated TLPs issued after an ATS query allows the request > redirect setting to be bypassed in the switch. > > Have mlx5 automatically use ATS in places where it makes sense. > > Jason Gunthorpe (4): > net/mlx5: Add IFC bits for mkey ATS > RDMA/core: Add UVERBS_ATTR_RAW_FD > RDMA/mlx5: Add support for dmabuf to devx umem > RDMA/mlx5: Enable ATS support for MRs and umems > > drivers/infiniband/core/uverbs_ioctl.c | 8 ++++ > drivers/infiniband/hw/mlx5/devx.c | 55 +++++++++++++++++------- > drivers/infiniband/hw/mlx5/mlx5_ib.h | 36 ++++++++++++++++ > drivers/infiniband/hw/mlx5/mr.c | 5 ++- > include/linux/mlx5/mlx5_ifc.h | 11 +++-- > include/rdma/uverbs_ioctl.h | 13 ++++++ > include/uapi/rdma/mlx5_user_ioctl_cmds.h | 1 + > 7 files changed, 109 insertions(+), 20 deletions(-) Applied to for-next, thanks Jason
Powered by blists - more mailing lists