From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 7A34BC55172 for ; Fri, 31 Jul 2026 21:37:56 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D9E7210F42B; Fri, 31 Jul 2026 21:37:55 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.b="Mh/09H8f"; dkim-atps=neutral Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by gabe.freedesktop.org (Postfix) with ESMTPS id 94F2710F42B for ; Fri, 31 Jul 2026 21:37:54 +0000 (UTC) Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 19C4D600C3; Fri, 31 Jul 2026 21:37:54 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id A0CAC1F00AC4; Fri, 31 Jul 2026 21:37:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1785533873; bh=ybKNoGvghGU0Ou7ZOs2A2D+Qwu5Isjo95hKQIoRo/sE=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=Mh/09H8fR6wVeJeS3nzsbPGXz8qk2WT06AkpgN1tZCsafBNrPdkiYvBrccl8+nbVO oTnz/jSY7LfAR1TW7CMUimSN5l9EH050xq9AyG67O3v680byvosPrEWmyNF4J2SDv3 v+Lr18aaqZ1GT6sJeUh4y7aAhhnKE2P8j08QaLMcUShWBj6ErfQFhrfMfvTF+qnh7S fFEczbIa+CoQYHomITvXnhCWHVkBrYzyIeTlP6xEyG4pXiKvlZeB57arxcq9e3nMbj VjqqusauSV7u457izThVk3AwFhSGFWk+KfNM4FsNRdgvo800ubL1RNtJym8LWGj3Bv +KwsCXnXEzH2Q== From: sashiko-bot@kernel.org Subject: Re: [PATCH v13 3/5] dma-buf: add optional get_pci_tph() callback To: "Zhiping Zhang" Cc: dri-devel@lists.freedesktop.org, linux-pci@vger.kernel.org, kvm@vger.kernel.org In-Reply-To: <20260731211601.3033906-4-zhipingz@meta.com> References: <20260731211601.3033906-1-zhipingz@meta.com> <20260731211601.3033906-4-zhipingz@meta.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Fri, 31 Jul 2026 21:37:53 +0000 Message-Id: <20260731213753.A0CAC1F00AC4@smtp.kernel.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: sashiko-reviews@lists.linux.dev Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" > Add an optional dma_buf_ops.get_pci_tph callback and a > DMA-buf importer wrapper, dma_buf_get_pci_tph(). >=20 > TPH is PCIe TLP Processing Hint. 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. >=20 > dma_buf_get_pci_tph() is the importer entry point. It requires > &dmabuf->resv to be held while the callback runs and returns > -EOPNOTSUPP when the exporter does not provide PCI TPH metadata. >=20 > The first user is VFIO_DEVICE_FEATURE_DMA_BUF_TPH in vfio-pci, with > mlx5 as the first importer. >=20 > Signed-off-by: Zhiping Zhang Sashiko has reviewed this patch and found no issues. It looks great! --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/20260731211601.3033= 906-1-zhipingz@meta.com?part=3D3