From: sashiko-bot@kernel.org
To: "Koichiro Den" <den@valinux.co.jp>
Cc: linux-pci@vger.kernel.org
Subject: Re: [PATCH v6 1/5] dmaengine: dw-edma: Add a channel transfer size operation
Date: Fri, 30 Oct 2026 15:11:18 +0000 [thread overview]
Message-ID: <sashiko-outbox-191143@kernel.org> (raw)
In-Reply-To: <20261030150742.2586776-2-den@valinux.co.jp>
> Expose the channel transfer size through a core operation for eDMA and
> HDMA. LL progress handling will use it to check for a stopped channel
> with no payload left to transfer.
>
> PCI Express DM Controller Databook 6.10a-lca06, section 7.3.4,
> "Detecting the End of the HDMA Transfer", documents this polling method:
>
> STATUS field of the HDMA Write/Read Channel Status register
> (HDMA_STATUS_OFF_[WR|RD]CH_i) is Stopped, and the HDMA Transfer Size
> register is 0x0.
>
> The same condition applies to eDMA as well.
>
> No functional change on its own.
>
> Signed-off-by: Koichiro Den <den@valinux.co.jp>
Sashiko has reviewed this patch and found no issues.
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261030150742.2586776-1-den@valinux.co.jp?part=1
next prev parent reply other threads:[~2026-10-30 15:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-30 15:07 [PATCH v6 0/5] dmaengine: dw-edma: Support dynamic LL appends Koichiro Den
2026-10-30 15:07 ` [PATCH v6 1/5] dmaengine: dw-edma: Add a channel transfer size operation Koichiro Den
2026-10-30 15:11 ` sashiko-bot [this message]
2026-10-30 16:18 ` Frank Li
2026-10-30 15:07 ` [PATCH v6 2/5] dmaengine: dw-edma: Reclaim LL entries from hardware progress Koichiro Den
2026-10-30 15:39 ` sashiko-bot
2026-10-30 16:21 ` Frank Li
2026-10-30 16:54 ` Frank Li
2026-10-30 15:07 ` [PATCH v6 3/5] dmaengine: dw-edma: Use HDMA watermark interrupts as LL progress Koichiro Den
2026-10-30 15:21 ` sashiko-bot
2026-10-30 15:07 ` [PATCH v6 4/5] dmaengine: dw-edma: Dynamically append requests while running Koichiro Den
2026-10-30 15:45 ` sashiko-bot
2026-10-30 15:07 ` [PATCH v6 5/5] dmaengine: dw-edma: Add trace support Koichiro Den
2026-10-30 15:17 ` sashiko-bot
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