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 X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70CF9C48BDF for ; Thu, 10 Jun 2021 19:41:50 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 4C927613BD for ; Thu, 10 Jun 2021 19:41:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229941AbhFJTnq (ORCPT ); Thu, 10 Jun 2021 15:43:46 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58978 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229823AbhFJTnp (ORCPT ); Thu, 10 Jun 2021 15:43:45 -0400 Received: from mail-lj1-x22b.google.com (mail-lj1-x22b.google.com [IPv6:2a00:1450:4864:20::22b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D142DC061574 for ; Thu, 10 Jun 2021 12:41:48 -0700 (PDT) Received: by mail-lj1-x22b.google.com with SMTP id c11so6488771ljd.6 for ; Thu, 10 Jun 2021 12:41:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux-foundation.org; s=google; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=ubXcbWgPRSI/FTTW821ibjosi1m1kp9EFIWEYpojr7U=; b=bZ1vnoT4gwchAfrORftPU/AdkdJzWMgCfShdVVXXijvp8wDeUduK7IBl//RUT2Ulm6 XHwuXVz/fsjsDcz4/BqhCamb74xI5Th27omkUefoltHlyZNm8IN025o/5HJtRgCTEN5C XqraxBQxk3IbfMlBbb/rG1fSyDxIiTuTaPetc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=ubXcbWgPRSI/FTTW821ibjosi1m1kp9EFIWEYpojr7U=; b=UBzG2qXd8PgxRIj0mEQLIdzJxLqu3piSTfnlFXn9Q6tMOXf+br/luQ9rVhTr34Gr66 joPLyfT1g3iUthngqZzETWPcBSTc1wzQEbRns+ieysFdAtkGxBFEUvk2c/FALdNomaQt SfEXqLRcdgOX7piqeedvFXjuNuYc95USRwaORNnCw2Vb/b1V+Ib9BUHyXQ7uIUB7EdnJ 7ebz/wG8sB/05qAYC1skvsUUlCqWlxIt7OTFc1j53iPvs3PoogWP1W7rGZUcH0B9CPL6 oAqqXWOnymYpFE6VtAjX5WBA9V4J70PliXSkO+2L9Q8m7hSj3QBRXc5/IaZDjhbE0tMS I8cw== X-Gm-Message-State: AOAM533b3oreQ2kFa5+GNl2q3WHbP3VgT7fwm9p4DX+wykVXE9ekqLmk doc8NOFXC6HcvWaGP3EAAEk25tO0QTgUj8UrKXU= X-Google-Smtp-Source: ABdhPJx4KVDHKbD6n5rl5wN2b7GDKmnRfRK6VO+ifwfQdq4Jp39BkqvScu740JkQ/IzmPi+8bZ8uGA== X-Received: by 2002:a2e:8190:: with SMTP id e16mr158565ljg.504.1623354106866; Thu, 10 Jun 2021 12:41:46 -0700 (PDT) Received: from mail-lj1-f179.google.com (mail-lj1-f179.google.com. [209.85.208.179]) by smtp.gmail.com with ESMTPSA id i13sm384298lfe.81.2021.06.10.12.41.43 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Jun 2021 12:41:43 -0700 (PDT) Received: by mail-lj1-f179.google.com with SMTP id z22so6475971ljh.8 for ; Thu, 10 Jun 2021 12:41:43 -0700 (PDT) X-Received: by 2002:a05:651c:383:: with SMTP id e3mr174508ljp.220.1623354103227; Thu, 10 Jun 2021 12:41:43 -0700 (PDT) MIME-Version: 1.0 References: <2e899de2-4b69-c4b6-33a6-09fb8949d2fd@nxp.com> In-Reply-To: <2e899de2-4b69-c4b6-33a6-09fb8949d2fd@nxp.com> From: Linus Torvalds Date: Thu, 10 Jun 2021 12:41:26 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: swiotlb/caamjr regression (Was: [GIT PULL] (swiotlb) stable/for-linus-5.12) To: =?UTF-8?Q?Horia_Geant=C4=83?= , Christoph Hellwig , Konrad Rzeszutek Wilk Cc: Dominique MARTINET , Jianxiong Gao , "linux-kernel@vger.kernel.org" , Lukas Hartmann , Aymen Sghaier , Herbert Xu , "David S. Miller" , "linux-crypto@vger.kernel.org" , "iommu@lists.linux-foundation.org" Content-Type: multipart/mixed; boundary="000000000000ab0cc405c46e9439" Precedence: bulk List-ID: X-Mailing-List: linux-crypto@vger.kernel.org --000000000000ab0cc405c46e9439 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Jun 10, 2021 at 7:52 AM Horia Geant=C4=83 wr= ote: > > Documentation/core-api/dma-api.rst explicitly allows for partial syncs: > Synchronise a single contiguous or scatter/gather mapping for the CPU > and device. With the sync_sg API, all the parameters must be the same > as those passed into the single mapping API. With the sync_single API, > you can use dma_handle and size parameters that aren't identical to > those passed into the single mapping API to do a partial sync. > > AFAICS commit 16fc3cef33a0 ("swiotlb: don't modify orig_addr in swiotlb_t= bl_sync_single") > is breaking this functionality. How about a patch like the attached? Does that fix things for you. Christoph? Comments - that commit removed the offset calculation entirely, because the old (unsigned long)tlb_addr & (IO_TLB_SIZE - 1) was wrong, but instead of removing it, I think it should have just fixed it to be (tlb_addr - mem->start) & (IO_TLB_SIZE - 1); instead. That way the slot offset always matches the slot index calculation= . I also made it then take the offset into account for the alloc_size checks. Does this UNTESTED patch perhaps do the right thing? Linus --000000000000ab0cc405c46e9439 Content-Type: text/x-patch; charset="US-ASCII"; name="patch.diff" Content-Disposition: attachment; filename="patch.diff" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_kprb3vx00 IGtlcm5lbC9kbWEvc3dpb3RsYi5jIHwgOSArKysrKysrKysKIDEgZmlsZSBjaGFuZ2VkLCA5IGlu c2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9rZXJuZWwvZG1hL3N3aW90bGIuYyBiL2tlcm5lbC9k bWEvc3dpb3RsYi5jCmluZGV4IDhjYTdkNTA1ZDYxYy4uZjYzZDE1ZTk0ZDM1IDEwMDY0NAotLS0g YS9rZXJuZWwvZG1hL3N3aW90bGIuYworKysgYi9rZXJuZWwvZG1hL3N3aW90bGIuYwpAQCAtMzQy LDYgKzM0Miw3IEBAIHN0YXRpYyB2b2lkIHN3aW90bGJfYm91bmNlKHN0cnVjdCBkZXZpY2UgKmRl diwgcGh5c19hZGRyX3QgdGxiX2FkZHIsIHNpemVfdCBzaXplCiB7CiAJc3RydWN0IGlvX3RsYl9t ZW0gKm1lbSA9IGlvX3RsYl9kZWZhdWx0X21lbTsKIAlpbnQgaW5kZXggPSAodGxiX2FkZHIgLSBt ZW0tPnN0YXJ0KSA+PiBJT19UTEJfU0hJRlQ7CisJdW5zaWduZWQgbG9uZyBvZmZzZXQgPSAodGxi X2FkZHIgLSBtZW0tPnN0YXJ0KSAmIChJT19UTEJfU0laRSAtIDEpOwogCXBoeXNfYWRkcl90IG9y aWdfYWRkciA9IG1lbS0+c2xvdHNbaW5kZXhdLm9yaWdfYWRkcjsKIAlzaXplX3QgYWxsb2Nfc2l6 ZSA9IG1lbS0+c2xvdHNbaW5kZXhdLmFsbG9jX3NpemU7CiAJdW5zaWduZWQgbG9uZyBwZm4gPSBQ Rk5fRE9XTihvcmlnX2FkZHIpOwpAQCAtMzUwLDYgKzM1MSwxNCBAQCBzdGF0aWMgdm9pZCBzd2lv dGxiX2JvdW5jZShzdHJ1Y3QgZGV2aWNlICpkZXYsIHBoeXNfYWRkcl90IHRsYl9hZGRyLCBzaXpl X3Qgc2l6ZQogCWlmIChvcmlnX2FkZHIgPT0gSU5WQUxJRF9QSFlTX0FERFIpCiAJCXJldHVybjsK IAorCWlmIChvZmZzZXQgPiBhbGxvY19zaXplKSB7CisJCWRldl9XQVJOX09OQ0UoZGV2LCAxLAor CQkJIkJ1ZmZlciBvdmVyZmxvdyBkZXRlY3RlZC4gT2Zmc2V0OiAlbHUuIE1hcHBpbmcgc2l6ZTog JXp1LlxuIiwKKwkJCW9mZnNldCwgc2l6ZSk7CisJCXJldHVybjsKKwl9CisJYWxsb2Nfc2l6ZSAt PSBvZmZzZXQ7CisJb3JpZ19hZGRyICs9IG9mZnNldDsKIAlpZiAoc2l6ZSA+IGFsbG9jX3NpemUp IHsKIAkJZGV2X1dBUk5fT05DRShkZXYsIDEsCiAJCQkiQnVmZmVyIG92ZXJmbG93IGRldGVjdGVk LiBBbGxvY2F0aW9uIHNpemU6ICV6dS4gTWFwcGluZyBzaXplOiAlenUuXG4iLAo= --000000000000ab0cc405c46e9439-- 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 X-Spam-Level: X-Spam-Status: No, score=-8.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,URIBL_RED autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 9C2EEC48BDF for ; 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[209.85.208.172]) by smtp.gmail.com with ESMTPSA id v138sm386254lfa.63.2021.06.10.12.41.43 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 10 Jun 2021 12:41:43 -0700 (PDT) Received: by mail-lj1-f172.google.com with SMTP id 131so6529902ljj.3 for ; Thu, 10 Jun 2021 12:41:43 -0700 (PDT) X-Received: by 2002:a05:651c:383:: with SMTP id e3mr174508ljp.220.1623354103227; Thu, 10 Jun 2021 12:41:43 -0700 (PDT) MIME-Version: 1.0 References: <2e899de2-4b69-c4b6-33a6-09fb8949d2fd@nxp.com> In-Reply-To: <2e899de2-4b69-c4b6-33a6-09fb8949d2fd@nxp.com> From: Linus Torvalds Date: Thu, 10 Jun 2021 12:41:26 -0700 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: swiotlb/caamjr regression (Was: [GIT PULL] (swiotlb) stable/for-linus-5.12) To: =?UTF-8?Q?Horia_Geant=C4=83?= , Christoph Hellwig , Konrad Rzeszutek Wilk Content-Type: multipart/mixed; boundary="000000000000ab0cc405c46e9439" Cc: Dominique MARTINET , Aymen Sghaier , Herbert Xu , Lukas Hartmann , "linux-kernel@vger.kernel.org" , "iommu@lists.linux-foundation.org" , "linux-crypto@vger.kernel.org" , "David S. Miller" , Jianxiong Gao X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" --000000000000ab0cc405c46e9439 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Thu, Jun 10, 2021 at 7:52 AM Horia Geant=C4=83 wr= ote: > > Documentation/core-api/dma-api.rst explicitly allows for partial syncs: > Synchronise a single contiguous or scatter/gather mapping for the CPU > and device. With the sync_sg API, all the parameters must be the same > as those passed into the single mapping API. With the sync_single API, > you can use dma_handle and size parameters that aren't identical to > those passed into the single mapping API to do a partial sync. > > AFAICS commit 16fc3cef33a0 ("swiotlb: don't modify orig_addr in swiotlb_t= bl_sync_single") > is breaking this functionality. How about a patch like the attached? Does that fix things for you. Christoph? Comments - that commit removed the offset calculation entirely, because the old (unsigned long)tlb_addr & (IO_TLB_SIZE - 1) was wrong, but instead of removing it, I think it should have just fixed it to be (tlb_addr - mem->start) & (IO_TLB_SIZE - 1); instead. That way the slot offset always matches the slot index calculation= . I also made it then take the offset into account for the alloc_size checks. Does this UNTESTED patch perhaps do the right thing? Linus --000000000000ab0cc405c46e9439 Content-Type: text/x-patch; charset="US-ASCII"; name="patch.diff" Content-Disposition: attachment; filename="patch.diff" Content-Transfer-Encoding: base64 Content-ID: X-Attachment-Id: f_kprb3vx00 IGtlcm5lbC9kbWEvc3dpb3RsYi5jIHwgOSArKysrKysrKysKIDEgZmlsZSBjaGFuZ2VkLCA5IGlu c2VydGlvbnMoKykKCmRpZmYgLS1naXQgYS9rZXJuZWwvZG1hL3N3aW90bGIuYyBiL2tlcm5lbC9k bWEvc3dpb3RsYi5jCmluZGV4IDhjYTdkNTA1ZDYxYy4uZjYzZDE1ZTk0ZDM1IDEwMDY0NAotLS0g YS9rZXJuZWwvZG1hL3N3aW90bGIuYworKysgYi9rZXJuZWwvZG1hL3N3aW90bGIuYwpAQCAtMzQy LDYgKzM0Miw3IEBAIHN0YXRpYyB2b2lkIHN3aW90bGJfYm91bmNlKHN0cnVjdCBkZXZpY2UgKmRl diwgcGh5c19hZGRyX3QgdGxiX2FkZHIsIHNpemVfdCBzaXplCiB7CiAJc3RydWN0IGlvX3RsYl9t ZW0gKm1lbSA9IGlvX3RsYl9kZWZhdWx0X21lbTsKIAlpbnQgaW5kZXggPSAodGxiX2FkZHIgLSBt ZW0tPnN0YXJ0KSA+PiBJT19UTEJfU0hJRlQ7CisJdW5zaWduZWQgbG9uZyBvZmZzZXQgPSAodGxi X2FkZHIgLSBtZW0tPnN0YXJ0KSAmIChJT19UTEJfU0laRSAtIDEpOwogCXBoeXNfYWRkcl90IG9y aWdfYWRkciA9IG1lbS0+c2xvdHNbaW5kZXhdLm9yaWdfYWRkcjsKIAlzaXplX3QgYWxsb2Nfc2l6 ZSA9IG1lbS0+c2xvdHNbaW5kZXhdLmFsbG9jX3NpemU7CiAJdW5zaWduZWQgbG9uZyBwZm4gPSBQ Rk5fRE9XTihvcmlnX2FkZHIpOwpAQCAtMzUwLDYgKzM1MSwxNCBAQCBzdGF0aWMgdm9pZCBzd2lv dGxiX2JvdW5jZShzdHJ1Y3QgZGV2aWNlICpkZXYsIHBoeXNfYWRkcl90IHRsYl9hZGRyLCBzaXpl X3Qgc2l6ZQogCWlmIChvcmlnX2FkZHIgPT0gSU5WQUxJRF9QSFlTX0FERFIpCiAJCXJldHVybjsK IAorCWlmIChvZmZzZXQgPiBhbGxvY19zaXplKSB7CisJCWRldl9XQVJOX09OQ0UoZGV2LCAxLAor CQkJIkJ1ZmZlciBvdmVyZmxvdyBkZXRlY3RlZC4gT2Zmc2V0OiAlbHUuIE1hcHBpbmcgc2l6ZTog JXp1LlxuIiwKKwkJCW9mZnNldCwgc2l6ZSk7CisJCXJldHVybjsKKwl9CisJYWxsb2Nfc2l6ZSAt PSBvZmZzZXQ7CisJb3JpZ19hZGRyICs9IG9mZnNldDsKIAlpZiAoc2l6ZSA+IGFsbG9jX3NpemUp IHsKIAkJZGV2X1dBUk5fT05DRShkZXYsIDEsCiAJCQkiQnVmZmVyIG92ZXJmbG93IGRldGVjdGVk LiBBbGxvY2F0aW9uIHNpemU6ICV6dS4gTWFwcGluZyBzaXplOiAlenUuXG4iLAo= --000000000000ab0cc405c46e9439 Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu --000000000000ab0cc405c46e9439--