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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2462DC3526F for ; Fri, 28 Jan 2022 00:26:50 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id E59356B007D; Thu, 27 Jan 2022 19:26:32 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id C0B8E8D0003; Thu, 27 Jan 2022 19:26:32 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id A82F46B0081; Thu, 27 Jan 2022 19:26:32 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0009.hostedemail.com [216.40.44.9]) by kanga.kvack.org (Postfix) with ESMTP id 85B9D8D0002 for ; Thu, 27 Jan 2022 19:26:32 -0500 (EST) Received: from smtpin27.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 4C7D61820751B for ; Fri, 28 Jan 2022 00:26:32 +0000 (UTC) X-FDA: 79077804624.27.B5B2F3B Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) by imf03.hostedemail.com (Postfix) with ESMTP id 74E3E2000A for ; Fri, 28 Jan 2022 00:26:29 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=deltatee.com; s=20200525; h=Subject:MIME-Version:References:In-Reply-To: Message-Id:Date:Cc:To:From:content-disposition; bh=aCaIC1aGEU3aE4W87JAzdHtyIfK4Tw21zQ04iz9J0qw=; b=Z69R0PP15szxfRgF3lQdDjdoCU wo/mXI4lYi8n/BvLZ9xCK6yUFuAwlswjoRaY/u6opnOYHIK/Gx7JB2KPTj2h0TXcG3h5PRViuSnc/ 5j2UmCO1qqgon+0L5+MSOS7FHf0YXhTl3m1hb68GLJ52n1SG/G7AlNuIqfINyLJbCyQsJ8n5o3Mn8 0s+EKnXr6vLLVTG3bmSE7BwIhTELu+o1NYDb7m/nmgMUPMIF3uuM6tH3PiDhzrzshKt5jlQhCA96N rbA+x2+ZPskhkkYf59tRpEHy8nr8UvTeXF5fapebJ/4AWBYv/BmBwrRARsMHxDbEozilNtK5aYCh5 pEHFhSCg==; Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1nDF5r-005Oca-Ri; Thu, 27 Jan 2022 17:26:25 -0700 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.94.2) (envelope-from ) id 1nDF5p-0001dL-Jc; Thu, 27 Jan 2022 17:26:21 -0700 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org Cc: Stephen Bates , Christoph Hellwig , Dan Williams , Jason Gunthorpe , =?UTF-8?q?Christian=20K=C3=B6nig?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Jakowski Andrzej , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Martin Oliveira , Chaitanya Kulkarni , Ralph Campbell , Logan Gunthorpe Date: Thu, 27 Jan 2022 17:26:10 -0700 Message-Id: <20220128002614.6136-21-logang@deltatee.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220128002614.6136-1-logang@deltatee.com> References: <20220128002614.6136-1-logang@deltatee.com> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 172.16.1.31 X-SA-Exim-Rcpt-To: linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-pci@vger.kernel.org, linux-mm@kvack.org, iommu@lists.linux-foundation.org, sbates@raithlin.com, hch@lst.de, jgg@ziepe.ca, christian.koenig@amd.com, ddutile@redhat.com, willy@infradead.org, daniel.vetter@ffwll.ch, jason@jlekstrand.net, dave.hansen@linux.intel.com, helgaas@kernel.org, dan.j.williams@intel.com, andrzej.jakowski@intel.com, dave.b.minturn@intel.com, jianxin.xiong@intel.com, ira.weiny@intel.com, robin.murphy@arm.com, martin.oliveira@eideticom.com, ckulkarnilinux@gmail.com, jhubbard@nvidia.com, rcampbell@nvidia.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v5 20/24] block: set FOLL_PCI_P2PDMA in __bio_iov_iter_get_pages() X-SA-Exim-Version: 4.2.1 (built Sat, 13 Feb 2021 17:57:42 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) X-Stat-Signature: 4yenhzjseepepw5khwtgwts66bsxg3zz X-Rspam-User: nil Authentication-Results: imf03.hostedemail.com; dkim=pass header.d=deltatee.com header.s=20200525 header.b=Z69R0PP1; spf=pass (imf03.hostedemail.com: domain of gunthorp@deltatee.com designates 204.191.154.188 as permitted sender) smtp.mailfrom=gunthorp@deltatee.com; dmarc=pass (policy=none) header.from=deltatee.com X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 74E3E2000A X-HE-Tag: 1643329589-698518 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: When a bio's queue supports PCI P2PDMA, set FOLL_PCI_P2PDMA for iov_iter_get_pages_flags(). This allows PCI P2PDMA pages to be passed from userspace and enables the O_DIRECT path in iomap based filesystems and direct to block devices. Signed-off-by: Logan Gunthorpe --- block/bio.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/block/bio.c b/block/bio.c index 055fcf159461..cb19689cf9fe 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1121,6 +1121,7 @@ static int __bio_iov_iter_get_pages(struct bio *bio= , struct iov_iter *iter) struct bio_vec *bv =3D bio->bi_io_vec + bio->bi_vcnt; struct page **pages =3D (struct page **)bv; bool same_page =3D false; + unsigned int flags =3D 0; ssize_t size, left; unsigned len, i; size_t offset; @@ -1133,7 +1134,12 @@ static int __bio_iov_iter_get_pages(struct bio *bi= o, struct iov_iter *iter) BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2); pages +=3D entries_left * (PAGE_PTRS_PER_BVEC - 1); =20 - size =3D iov_iter_get_pages(iter, pages, LONG_MAX, nr_pages, &offset); + if (bio->bi_bdev && bio->bi_bdev->bd_disk && + blk_queue_pci_p2pdma(bio->bi_bdev->bd_disk->queue)) + flags |=3D FOLL_PCI_P2PDMA; + + size =3D iov_iter_get_pages_flags(iter, pages, LONG_MAX, nr_pages, + &offset, flags); if (unlikely(size <=3D 0)) return size ? size : -EFAULT; =20 --=20 2.30.2