From: sashiko-bot@kernel.org
To: "Koichiro Den" <den@valinux.co.jp>
Cc: linux-pci@vger.kernel.org, ntb@lists.linux.dev
Subject: Re: [PATCH v3 4/7] PCI: endpoint: pci-epf-vntb: Export endpoint DMA channels
Date: Mon, 31 Aug 2026 20:52:56 +0000 [thread overview]
Message-ID: <20260831205257.001171F000E9@smtp.kernel.org> (raw)
In-Reply-To: <20260831182657.329614-5-den@valinux.co.jp>
> An RC may use endpoint-local DMA read channels to transfer data directly
> to an endpoint DMA address once both sides agree to use them. Quiescing
> an unrolled eDMA channel disables its whole direction, so reserve the
> complete read direction and route its interrupts to the RC when dma_bar
> is configured.
>
> Describe the controller and per-channel descriptor memory in a private
> control-region extension.
>
> Add a dma_bar configfs attribute. An explicit BAR selection enables DMA
> export; leaving it unassigned keeps the feature disabled.
>
> Keep resources already assigned to a BAR in place, and map the rest
> through the selected dma_bar.
>
> Signed-off-by: Koichiro Den <den@valinux.co.jp>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20260831182657.329614-1-den@valinux.co.jp?part=4
next prev parent reply other threads:[~2026-08-31 20:52 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-31 18:26 [PATCH v3 0/7] PCI: endpoint: Remote DMA support via vNTB Koichiro Den
2026-08-31 18:26 ` [PATCH v3 1/7] PCI: endpoint: Add DMA auxiliary resource metadata Koichiro Den
2026-08-31 20:22 ` sashiko-bot
2026-08-31 18:26 ` [PATCH v3 2/7] PCI: dwc: Expose endpoint DMA resources Koichiro Den
2026-08-31 20:34 ` sashiko-bot
2026-08-31 18:26 ` [PATCH v3 3/7] PCI: endpoint: pci-epf-vntb: Move epf_ntb_is_bar_used() up Koichiro Den
2026-08-31 20:35 ` sashiko-bot
2026-08-31 18:26 ` [PATCH v3 4/7] PCI: endpoint: pci-epf-vntb: Export endpoint DMA channels Koichiro Den
2026-08-31 20:52 ` sashiko-bot [this message]
2026-09-03 21:20 ` Frank Li
2026-09-04 1:34 ` Koichiro Den
2026-08-31 18:26 ` [PATCH v3 5/7] PCI: endpoint: pci-epf-vntb: Allow DMA and MW to share a BAR Koichiro Den
2026-08-31 21:05 ` sashiko-bot
2026-09-02 2:40 ` Koichiro Den
2026-08-31 18:26 ` [PATCH v3 6/7] NTB: ntb_hw_epf: Discover vNTB-embedded DMA Koichiro Den
2026-08-31 21:20 ` sashiko-bot
2026-08-31 18:26 ` [PATCH v3 7/7] Documentation: PCI: endpoint: Document vNTB DMA export Koichiro Den
2026-08-31 21:21 ` sashiko-bot
2026-09-03 11:43 ` [PATCH v3 0/7] PCI: endpoint: Remote DMA support via vNTB Manivannan Sadhasivam
2026-09-03 15:13 ` Koichiro Den
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