From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 68C5040B0EC; Mon, 21 Sep 2026 20:20:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=204.191.154.188 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790022010; cv=none; b=fAfsvBT+8O/mbj174NsYh4bSaJq77dotdcfmDFKNG5LIJDp5qzXy/19gDaL/oDEI4oRmUxRm+08mFPUjk6UnCZV7fNoVzLG714LWvTEORaDZdwbvv5FCKM8SpuWsZnq0hiAuVkn2nDKKoF0/sTNVYMj7v84Xm1qKmaRlUHAoHgQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790022010; c=relaxed/simple; bh=ULL2sCfVDm6zc7ankviblB2XQp/aT+4WTaCaV0sJlaw=; h=Message-ID:Date:MIME-Version:To:Cc:References:From:In-Reply-To: Content-Type:Subject; b=eDcUrMPElDptb2Al+8iigZIYmR828zM7+g1zRpu1qMbMAeRH3hI1zTEzDs8SxPN7YasJJ0X5NLmalb7TK5qc/a3GdsSF7CDL3OukDuiaSZqQ7lnErH4Zxioc+dYyTZLTk4RL5QKvuyoAODKmyd358L3k1Ggg1+w7pEf6QkiBLE8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com; spf=pass smtp.mailfrom=deltatee.com; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b=hBugeAc7; arc=none smtp.client-ip=204.191.154.188 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=deltatee.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=deltatee.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=deltatee.com header.i=@deltatee.com header.b="hBugeAc7" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:In-Reply-To:From:References:Cc:To: MIME-Version:Date:Message-ID:content-disposition; bh=/kI6oW2E5j3Q5O4fdEa3eYERY9JobvSzq1pyfLPXvP8=; b=hBugeAc7MrRyOU4zBBCUqtS5XS 6+RXvhBejB2Fpn0eyZquoh0extXUkJ3cSiML7q4kcs+2HZShy/FLhx3xDR8ERnzuxkkOygY4Dyxp/ cxBNa2IKbP7A7czer0QQNdwZVLcrB8Qgjf4BUS1DyXjVpeDFvB9EaO6JLg1TRi3xb2RiKmH5JI+uC EQsgw3q1T+FeczuwLQHEDxk6luELJbNOfCyzAOuDwobdL3t7hEyxq6eX141qiHY38qeDbDgUgWpHL GZH9fnTofY1KboZF0j5B6HBoFPFWZMuwg2fmN+7+TaxYsyuurMOSpMH4wlQjZ2oNNOAv6NSrY9w6I cStzuOnA==; Received: from guinness.priv.deltatee.com ([172.16.1.162]) by ale.deltatee.com with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.98.2) (envelope-from ) id 1x8kUe-0000000F4dP-3Hw8; Mon, 21 Sep 2026 14:20:05 -0600 Message-ID: Date: Mon, 21 Sep 2026 14:20:02 -0600 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: Leon Romanovsky , Bjorn Helgaas , Chaitanya Kulkarni , Greg Kroah-Hartman , Jens Axboe , Alex Williamson , Ankit Agrawal , Jason Gunthorpe , Jonathan Corbet , Shuah Khan , "Joerg Roedel (AMD)" , Will Deacon , Robin Murphy , Randy Dunlap , Sumit Semwal , =?UTF-8?Q?Christian_K=C3=B6nig?= Cc: linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, Tushar Dave , linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org References: <20260920-fix-p2p-acs-v4-0-v7-0-ca0828ab697c@nvidia.com> <20260920-fix-p2p-acs-v4-0-v7-7-ca0828ab697c@nvidia.com> Content-Language: en-CA From: Logan Gunthorpe In-Reply-To: <20260920-fix-p2p-acs-v4-0-v7-7-ca0828ab697c@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SA-Exim-Connect-IP: 172.16.1.162 X-SA-Exim-Rcpt-To: leon@kernel.org, bhelgaas@google.com, kch@nvidia.com, gregkh@linuxfoundation.org, axboe@kernel.dk, alex@shazbot.org, ankita@nvidia.com, jgg@ziepe.ca, corbet@lwn.net, skhan@linuxfoundation.org, joro@8bytes.org, will@kernel.org, robin.murphy@arm.com, rdunlap@infradead.org, sumit.semwal@linaro.org, christian.koenig@amd.com, linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, iommu@lists.linux.dev, tdave@nvidia.com, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org, linux-rdma@vger.kernel.org, kvm@vger.kernel.org X-SA-Exim-Mail-From: logang@deltatee.com X-Spam-Level: Subject: Re: [PATCH v7 07/19] PCI/P2PDMA: Answer routing per TLP class X-SA-Exim-Version: 4.2.1 (built Sun, 23 Feb 2025 07:57:16 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) On 2026-09-20 05:41, Leon Romanovsky wrote: > From: Leon Romanovsky > > calc_map_type_and_dist() returns one mapping type per provider and client, > valid only for strictly ordered Requests carrying an Untranslated address. > Clients that use Relaxed Ordering or ATS cannot ask what the fabric would > do with their traffic. > > Add enum pci_p2pdma_tlp_flags to name a class and pci_p2pdma_map_type_tlp() > to ask about one. The topology walk and the ACS Control reads do not depend > on the class, so decide all of them from the one walk and cache them > together, four bits each. Every class still answers alike; the controls > that tell them apart come next. > > Tested-by: Tushar Dave > Signed-off-by: Leon Romanovsky Ok, this makes more sense to me after a fresh review: Reviewed-by: Logan Gunthorpe