From: sashiko-bot@kernel.org
To: "Zhiping Zhang" <zhipingz@meta.com>
Cc: dri-devel@lists.freedesktop.org, kvm@vger.kernel.org,
linux-pci@vger.kernel.org
Subject: Re: [PATCH v7 3/5] dma-buf: add optional get_tph() callback
Date: Fri, 12 Jun 2026 16:46:29 +0000 [thread overview]
Message-ID: <20260612164630.101121F00A3F@smtp.kernel.org> (raw)
In-Reply-To: <20260611161546.4075580-4-zhipingz@meta.com>
> Add an optional dma_buf_ops.get_tph callback and a dma_buf_get_tph()
> wrapper for importers.
>
> 8-bit ST and 16-bit Extended ST are distinct PCIe TPH namespaces, so
> the importer requests the namespace it can emit and the exporter
> returns the matching ST/PH tuple or -EOPNOTSUPP.
>
> dma_buf_get_tph() is the importer entry point. It returns -EOPNOTSUPP
> when the exporter lacks the callback and requires dmabuf->resv to be
> held while the callback runs.
>
> The first user is VFIO_DEVICE_FEATURE_DMA_BUF_TPH in vfio-pci, with
> mlx5 as the first importer.
>
> Signed-off-by: Zhiping Zhang <zhipingz@meta.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260611161546.4075580-1-zhipingz@meta.com?part=3
next prev parent reply other threads:[~2026-06-12 16:46 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-06-11 16:11 [PATCH v7 0/5] vfio/dma-buf: add TPH support for peer-to-peer access Zhiping Zhang
2026-06-11 16:11 ` [PATCH v7 1/5] net/mlx5: free mlx5_st_idx_data on final dealloc Zhiping Zhang
2026-06-12 16:46 ` sashiko-bot
2026-06-11 16:11 ` [PATCH v7 2/5] PCI/TPH: Add requester/completer type helpers Zhiping Zhang
2026-06-12 16:46 ` sashiko-bot
2026-06-12 16:52 ` Alex Williamson
2026-06-11 16:11 ` [PATCH v7 3/5] dma-buf: add optional get_tph() callback Zhiping Zhang
2026-06-12 16:46 ` sashiko-bot [this message]
2026-06-11 16:11 ` [PATCH v7 4/5] vfio/pci: implement get_tph and DMA_BUF_TPH feature Zhiping Zhang
2026-06-12 16:46 ` sashiko-bot
2026-06-12 17:10 ` Alex Williamson
2026-06-11 16:11 ` [PATCH v7 5/5] RDMA/mlx5: get tph for p2p access when registering dma-buf mr Zhiping Zhang
2026-06-12 16:46 ` sashiko-bot
-- strict thread matches above, loose matches on Subject: below --
2026-06-10 19:31 [PATCH v7 0/5] vfio/dma-buf: add TPH support for peer-to-peer access Zhiping Zhang
2026-06-10 19:31 ` [PATCH v7 3/5] dma-buf: add optional get_tph() callback Zhiping Zhang
2026-06-11 10:35 ` Christian König
2026-06-11 23:07 ` Zhiping Zhang
2026-06-11 20:26 ` sashiko-bot
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