From: Niklas Cassel <cassel@kernel.org>
To: Robin Murphy <robin.murphy@arm.com>
Cc: "Sumit Kumar" <sumit.kumar@oss.qualcomm.com>,
"Krishna Chaitanya Chundru" <krishna.chundru@oss.qualcomm.com>,
"Veerabhadrarao Badiganti"
<veerabhadrarao.badiganti@oss.qualcomm.com>,
"Subramanian Ananthanarayanan"
<subramanian.ananthanarayanan@oss.qualcomm.com>,
"Akhil Vinod" <akhil.vinod@oss.qualcomm.com>,
"Manivannan Sadhasivam" <mani@kernel.org>,
"Vinod Koul" <vkoul@kernel.org>,
"Marek Szyprowski" <m.szyprowski@samsung.com>,
"Krzysztof Wilczyński" <kwilczynski@kernel.org>,
"Kishon Vijay Abraham I" <kishon@kernel.org>,
"Bjorn Helgaas" <bhelgaas@google.com>,
dmaengine@vger.kernel.org, linux-kernel@vger.kernel.org,
iommu@lists.linux.dev, linux-pci@vger.kernel.org,
mhi@lists.linux.dev, linux-arm-msm@vger.kernel.org,
"Frank Li" <Frank.Li@nxp.com>
Subject: Re: [PATCH 1/3] dmaengine: Add multi-buffer support in single DMA transfer
Date: Mon, 16 Mar 2026 18:05:13 +0100 [thread overview]
Message-ID: <abg4EnbRUz7kjxjQ@ryzen> (raw)
In-Reply-To: <ab632240-f4eb-4bcc-8170-2a9a024c1ce7@arm.com>
On Fri, Mar 13, 2026 at 03:16:50PM +0000, Robin Murphy wrote:
> On 2026-03-13 6:49 am, Sumit Kumar wrote:
>
> If you want to batch multiple
> dmaengine_slave_config()/dma_prep_slave_single() operations into some
> many-to-many variant of dmaengine_prep_peripheral_dma_vec(), then surely
> that requires actual batching of the config part as well - e.g. passing an
> explicit vector of distinct dma_slave_configs corresponding to each
> individual dma_vec - in order to be able to work correctly in general?
This make me think of Frank's series which tries to create an API which
combines dmaengine_slave_config() with dmaengine_prep_slave_single():
https://lore.kernel.org/dmaengine/20251218-dma_prep_config-v2-0-c07079836128@nxp.com/
Not exactly the same, but might still be of interest.
Kind regards,
Niklas
next prev parent reply other threads:[~2026-03-16 17:05 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-13 6:49 [PATCH 0/3] dmaengine: Add batched scatter-gather DMA support Sumit Kumar
2026-03-13 6:49 ` [PATCH 1/3] dmaengine: Add multi-buffer support in single DMA transfer Sumit Kumar
2026-03-13 15:16 ` Robin Murphy
2026-03-16 17:05 ` Niklas Cassel [this message]
2026-03-17 10:54 ` Vinod Koul
2026-03-30 5:28 ` Sumit Kumar
2026-03-13 6:49 ` [PATCH 2/3] PCI: epf-mhi: Add batched DMA read support Sumit Kumar
2026-03-13 6:49 ` [PATCH 3/3] bus: mhi: ep: Use batched read for ring caching Sumit Kumar
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