From: Jason Gunthorpe <jgg@nvidia.com>
To: "Thomas Hellström" <thomas.hellstrom@linux.intel.com>
Cc: "Alistair Popple" <apopple@nvidia.com>,
"Christian König" <christian.koenig@amd.com>,
"Karl Mehltretter" <kmehltretter@gmail.com>,
"Dongwon Kim" <dongwon.kim@intel.com>,
dri-devel@lists.freedesktop.org, intel-xe@lists.freedesktop.org,
iommu@lists.linux.dev, "Kevin Tian" <kevin.tian@intel.com>,
"Leon Romanovsky" <leonro@nvidia.com>,
linaro-mm-sig@lists.linaro.org, linux-media@vger.kernel.org,
"Matthew Brost" <matthew.brost@intel.com>,
"Simona Vetter" <simona.vetter@ffwll.ch>,
"Sumit Semwal" <sumit.semwal@linaro.org>,
"Vivek Kasireddy" <vivek.kasireddy@intel.com>
Subject: Re: [PATCH RFC 03/26] dma-buf: Add dma_buf_mapping_attach()
Date: Mon, 19 Oct 2026 15:41:23 -0300 [thread overview]
Message-ID: <20261019184123.GR13920@nvidia.com> (raw)
In-Reply-To: <5f57c49d34f2812b0b68be71218ce0a9b6510c14.camel@linux.intel.com>
On Mon, Oct 19, 2026 at 03:47:55PM +0200, Thomas Hellström wrote:
> > Making the decision right before map seems like a reasonable
> > enhancement, but I can no longer remember off hand if that would
> > cause complications :)
>
> It was that mellanox ATS thing, right? That's the only case I heard of
> that needed the mapping type decision (or at least a strong hint)
> early.
No, it would work after the fact just mlx5 forms the attachment and
the map approximately at the same time in most important cases.
Also after LPC I've also realized that UIO shares alot of similarity
with ATS, except getting UIO correct on both sides is functionally
required not just a performance optimization :\
Jason
next prev parent reply other threads:[~2026-10-19 18:41 UTC|newest]
Thread overview: 49+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-18 0:11 [PATCH RFC 00/26] Add DMA-buf mapping types and convert vfio/iommufd to use them Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 01/26] dma-buf: Introduce DMA-buf mapping types Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 02/26] dma-buf: Add the SGT DMA mapping type Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 03/26] dma-buf: Add dma_buf_mapping_attach() Jason Gunthorpe
2026-10-16 20:26 ` Karl Mehltretter
2026-10-19 8:35 ` Christian König
2026-10-19 12:43 ` Thomas Hellström
2026-10-19 13:30 ` Jason Gunthorpe
2026-10-19 13:47 ` Thomas Hellström
2026-10-19 15:34 ` Christian König
2026-10-19 18:41 ` Jason Gunthorpe [this message]
2026-02-18 0:11 ` [PATCH RFC 04/26] dma-buf: Route SGT related actions through attach->map_type Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 05/26] dma-buf: Allow single exporter drivers to avoid the match_mapping function Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 06/26] drm: Check the SGT ops for drm_gem_map_dma_buf() Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 07/26] dma-buf: Convert all the simple exporters to use SGT mapping type Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 08/26] drm/vmwgfx: Use match_mapping instead of dummy calls Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 09/26] accel/habanalabs: Use the SGT mapping type Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 10/26] drm/xe/dma-buf: " Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 11/26] drm/amdgpu: " Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 12/26] vfio/pci: Change the DMA-buf exporter to use mapping_type Jason Gunthorpe
2026-04-13 8:29 ` Baolu Lu
2026-04-13 13:01 ` Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 13/26] dma-buf: Update dma_buf_phys_vec_to_sgt() to use the SGT mapping type Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 14/26] iio: buffer: convert " Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 15/26] functionfs: " Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 16/26] dma-buf: Remove unused SGT stuff from the common structures Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 17/26] treewide: Rename dma_buf_map_attachment(_unlocked) to dma_buf_sgt_ Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 18/26] treewide: Rename dma_buf_unmap_attachment(_unlocked) to dma_buf_sgt_* Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 19/26] treewide: Rename dma_buf_attach() to dma_buf_sgt_attach() Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 20/26] treewide: Rename dma_buf_dynamic_attach() to dma_buf_sgt_dynamic_attach() Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 21/26] dma-buf: Add the Physical Address List DMA mapping type Jason Gunthorpe
2026-04-13 8:58 ` Christian König
2026-04-13 12:16 ` Jason Gunthorpe
2026-04-22 8:17 ` Christian König
2026-04-22 11:53 ` Jason Gunthorpe
2026-04-22 12:39 ` Christian König
2026-04-22 13:13 ` Jason Gunthorpe
2026-04-22 14:04 ` Christian König
2026-04-22 15:00 ` Jason Gunthorpe
2026-05-09 5:31 ` Xu Yilun
2026-05-11 22:48 ` Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 22/26] vfio/pci: Add physical address list support to DMABUF Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 23/26] iommufd: Use the PAL mapping type instead of a vfio function Jason Gunthorpe
2026-10-16 19:40 ` Karl Mehltretter
2026-02-18 0:11 ` [PATCH RFC 24/26] iommufd: Support DMA-bufs with multiple physical ranges Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 25/26] iommufd/selftest: Check multi-phys DMA-buf scenarios Jason Gunthorpe
2026-02-18 0:11 ` [PATCH RFC 26/26] dma-buf: Add kunit tests for mapping type Jason Gunthorpe
2026-03-01 19:05 ` [PATCH RFC 00/26] Add DMA-buf mapping types and convert vfio/iommufd to use them Jason Gunthorpe
2026-03-03 7:07 ` Kasireddy, Vivek
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