From: Jason Gunthorpe <jgg@nvidia.com>
To: "Christian König" <christian.koenig@amd.com>
Cc: "Alistair Popple" <apopple@nvidia.com>,
dri-devel@lists.freedesktop.org, sumit.semwal@linaro.org,
"Thomas Hellström" <thomas.hellstrom@linux.intel.com>,
"Simona Vetter" <simona.vetter@ffwll.ch>,
"Matthew Brost" <matthew.brost@intel.com>,
"Vivek Kasireddy" <vivek.kasireddy@intel.com>,
"Dongwon Kim" <dongwon.kim@intel.com>,
"Leon Romanovsky" <leonro@nvidia.com>,
"Kevin Tian" <kevin.tian@intel.com>,
"Xu Yilun" <yilun.xu@linux.intel.com>,
"Karl Mehltretter" <kmehltretter@gmail.com>,
"Baolu Lu" <baolu.lu@linux.intel.com>,
"Felix Kuehling" <felix.kuehling@amd.com>,
"Alex Deucher" <alexander.deucher@amd.com>,
intel-xe@lists.freedesktop.org, amd-gfx@lists.freedesktop.org,
linux-media@vger.kernel.org, linaro-mm-sig@lists.linaro.org,
linux-rdma@vger.kernel.org, iommu@lists.linux.dev,
"Alexey Kardashevskiy" <aik@amd.com>,
zhipingz@meta.com, treding@nvidia.com, jhubbard@nvidia.com
Subject: Re: [PATCH 23/26] treewide: Rename dma_buf_attach() to dma_buf_sgt_attach()
Date: Tue, 27 Oct 2026 09:38:59 -0300 [thread overview]
Message-ID: <20261027123859.GE1671235@nvidia.com> (raw)
In-Reply-To: <27307d58-9ca9-4624-a564-6e35fb4befb5@amd.com>
On Tue, Oct 27, 2026 at 01:07:36PM +0100, Christian König wrote:
> On 10/26/26 06:36, Alistair Popple wrote:
> > From: Jason Gunthorpe <jgg@nvidia.com>
> >
> > This attach function always creates a SGT mapping type importer.
>
> Yeah that is a clear NO-GO. The attachment should be the same for
> the new interface as well.
Not sure I understand this comment...
This was intended as a helper so that existing drivers can run through
the sgt based mapping type flow without having to open code it. It is
hardwired to only do sgt like this. If you want to use more than sgt
as your mapping type don't use this function
The point was to create a clear distinction in the API names when
things were in a SGT-only flow vs using the newer negotiable flow.
> > Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Alistair since you rebased it you should put your SOB on every
patch...
Regards,
Jason
next prev parent reply other threads:[~2026-10-27 12:39 UTC|newest]
Thread overview: 71+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-26 5:35 [PATCH 00/26] DMA-buf mapping types Alistair Popple
2026-10-26 5:35 ` [PATCH 01/26] dma-buf: Introduce " Alistair Popple
2026-10-26 7:00 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 02/26] dma-buf: Add the SGT DMA mapping type Alistair Popple
2026-10-26 7:04 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 03/26] dma-buf: Add dma_buf_mapping_attach() Alistair Popple
2026-10-26 7:20 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 04/26] dma-buf: Route SGT related actions through attach->map_type Alistair Popple
2026-10-26 7:29 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 05/26] dma-buf: Let the exporter select mapping type at pin/map Alistair Popple
2026-10-26 7:39 ` sashiko-bot
2026-10-26 8:03 ` Karl Mehltretter
2026-10-27 5:46 ` Alistair Popple
2026-10-26 5:35 ` [PATCH 06/26] dma-buf: Add match set queries for exporter placement decisions Alistair Popple
2026-10-26 7:42 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 07/26] dma-buf: Add dma_buf_mapping_map() returning a type-tagged mapping Alistair Popple
2026-10-26 7:56 ` sashiko-bot
2026-10-26 5:35 ` [PATCH 08/26] dma-buf: Allow single exporter drivers to avoid the match_mapping function Alistair Popple
2026-10-26 7:58 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 09/26] drm: Check the SGT ops for drm_gem_map_dma_buf() Alistair Popple
2026-10-26 8:02 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 10/26] dma-buf: Convert all the simple exporters to use SGT mapping type Alistair Popple
2026-10-26 8:12 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 11/26] drm/vmwgfx: Use match_mapping instead of dummy calls Alistair Popple
2026-10-26 8:13 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 12/26] accel/habanalabs: Use the SGT_P2P mapping type Alistair Popple
2026-10-26 8:18 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 13/26] drm/xe/dma-buf: Use the SGT " Alistair Popple
2026-10-26 8:34 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 14/26] drm/amdgpu: " Alistair Popple
2026-10-26 8:46 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 15/26] vfio/pci: Change the DMA-buf exporter to use mapping_type Alistair Popple
2026-10-26 9:00 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 16/26] RDMA/uverbs: Use the SGT_P2P mapping type Alistair Popple
2026-10-26 9:16 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 17/26] dma-buf: Update dma_buf_phys_vec_to_sgt() to use the SGT " Alistair Popple
2026-10-26 9:26 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 18/26] iio: buffer: convert " Alistair Popple
2026-10-26 9:28 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 19/26] functionfs: " Alistair Popple
2026-10-26 9:35 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 20/26] dma-buf: Remove unused SGT stuff from the common structures Alistair Popple
2026-10-26 9:39 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 21/26] treewide: Rename dma_buf_map_attachment(_unlocked) to dma_buf_sgt_ Alistair Popple
2026-10-26 9:49 ` sashiko-bot
2026-10-27 12:05 ` Christian König
2026-10-27 12:35 ` Jason Gunthorpe
2026-10-26 5:36 ` [PATCH 22/26] treewide: Rename dma_buf_unmap_attachment(_unlocked) to dma_buf_sgt_* Alistair Popple
2026-10-26 9:56 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 23/26] treewide: Rename dma_buf_attach() to dma_buf_sgt_attach() Alistair Popple
2026-10-26 10:01 ` sashiko-bot
2026-10-27 2:15 ` Karl Mehltretter
2026-10-27 3:42 ` Mikko Perttunen
2026-10-27 12:33 ` Jason Gunthorpe
2026-10-27 13:34 ` Mikko Perttunen
2026-10-27 13:43 ` Christian König
2026-10-27 12:11 ` Christian König
2026-10-27 12:31 ` Jason Gunthorpe
2026-10-27 12:07 ` Christian König
2026-10-27 12:38 ` Jason Gunthorpe [this message]
2026-10-27 13:17 ` Christian König
2026-10-27 14:08 ` Jason Gunthorpe
2026-10-27 14:28 ` Christian König
2026-10-27 14:44 ` Jason Gunthorpe
2026-10-27 14:54 ` Christian König
2026-10-26 5:36 ` [PATCH 24/26] treewide: Rename dma_buf_dynamic_attach() to dma_buf_sgt_dynamic_attach() Alistair Popple
2026-10-26 10:13 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 25/26] dma-buf: Add kunit tests for mapping type Alistair Popple
2026-10-26 10:19 ` sashiko-bot
2026-10-26 5:36 ` [PATCH 26/26] dma-buf: Add kunit tests for mapping type selection Alistair Popple
2026-10-26 10:22 ` sashiko-bot
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