From: sashiko-bot@kernel.org
To: "Leon Romanovsky" <leon@kernel.org>
Cc: linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org
Subject: Re: [PATCH v11 17/19] PCI/P2PDMA: Let a client declare that it selects ATS per mapping
Date: Tue, 13 Oct 2026 14:47:13 +0000 [thread overview]
Message-ID: <sashiko-outbox-169935@kernel.org> (raw)
In-Reply-To: <20261013-fix-p2p-acs-v4-0-v11-17-72cf8c96e617@nvidia.com>
> From: Leon Romanovsky <leonro@nvidia.com>
>
> The PCIe ATS Enable bit covers the whole device, so P2PDMA cannot tell
> from it whether a client will translate a given address. Most devices
> translate any address once ATS is enabled, but some choose ATS per DMA
> mapping and can still use bus addresses for the rest.
>
> Add pcim_p2pdma_set_ats_per_mapping() so the driver of such a device can
> declare that before P2PDMA starts treating clients with ATS enabled as
> translating everything. Keep it in the device's P2PDMA state, which
> already ends with the driver binding.
>
> Reviewed-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>
> Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Sashiko has reviewed this patch and found no issues. It looks great!
--
Sashiko AI review · https://sashiko.dev/#/patchset/20261013-fix-p2p-acs-v4-0-v11-0-72cf8c96e617@nvidia.com?part=17
next prev parent reply other threads:[~2026-10-13 14:47 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-13 14:25 [PATCH v11 00/19] PCI/P2PDMA: Route peer-to-peer DMA by TLP class Leon Romanovsky
2026-10-13 14:25 ` [PATCH v11 01/19] PCI/P2PDMA: Honor device-specific ACS redirection Leon Romanovsky
2026-10-13 14:44 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 02/19] PCI/P2PDMA: Document the TLP attribute assumptions Leon Romanovsky
2026-10-13 14:28 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 03/19] PCI/P2PDMA: Derive routing from directional ACS controls Leon Romanovsky
2026-10-13 14:32 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 04/19] PCI: Reject unreadable ACS controls in isolation checks Leon Romanovsky
2026-10-13 14:37 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 05/19] PCI/P2PDMA: Evaluate ACS controls at the path divergence Leon Romanovsky
2026-10-13 14:38 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 06/19] PCI/P2PDMA: Document directional ACS routing Leon Romanovsky
2026-10-13 14:28 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 07/19] PCI/P2PDMA: Collect the path's ACS controls before deciding Leon Romanovsky
2026-10-13 14:32 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 08/19] PCI/P2PDMA: Answer routing per TLP class Leon Romanovsky
2026-10-13 14:34 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 09/19] PCI/P2PDMA: Route Relaxed Ordering Completions directly Leon Romanovsky
2026-10-13 14:37 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 10/19] PCI/P2PDMA: Reject Translated Requests blocked by Translation Blocking Leon Romanovsky
2026-10-13 14:49 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 11/19] PCI/P2PDMA: Route Translated Requests under Direct Translated P2P Leon Romanovsky
2026-10-13 14:36 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 12/19] PCI/P2PDMA: Log detailed ACS routing diagnostics Leon Romanovsky
2026-10-13 14:40 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 13/19] PCI/P2PDMA: Add KUnit tests for the ACS routing decisions Leon Romanovsky
2026-10-13 14:40 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 14/19] PCI/P2PDMA: Test the ACS P2P routing walk Leon Romanovsky
2026-10-13 14:49 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 15/19] PCI: Add KUnit coverage for ACS isolation checks Leon Romanovsky
2026-10-13 14:44 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 16/19] PCI/P2PDMA: Document TLP-class routing Leon Romanovsky
2026-10-13 14:39 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 17/19] PCI/P2PDMA: Let a client declare that it selects ATS per mapping Leon Romanovsky
2026-10-13 14:47 ` sashiko-bot [this message]
2026-10-13 14:25 ` [PATCH v11 18/19] PCI/P2PDMA: Evaluate the ATS path for clients with ATS enabled Leon Romanovsky
2026-10-13 14:47 ` sashiko-bot
2026-10-13 14:25 ` [PATCH v11 19/19] PCI/P2PDMA: Test the routing of " Leon Romanovsky
2026-10-13 14:47 ` sashiko-bot
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