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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 18763C6498F for ; Thu, 25 Aug 2022 15:25:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S242372AbiHYPZG (ORCPT ); Thu, 25 Aug 2022 11:25:06 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34926 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241502AbiHYPYo (ORCPT ); Thu, 25 Aug 2022 11:24:44 -0400 Received: from ale.deltatee.com (ale.deltatee.com [204.191.154.188]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5296BB99DF; Thu, 25 Aug 2022 08:24:42 -0700 (PDT) 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=mLYWjwjaacuhTQSD3LMzZRV3Gg44uzd/+90ZlUZOo0E=; b=JlA02I9mYM/1XyzPhpPhzA8jen fB0btV3snf/z9KW6dTxn6u/abas7864PAvz+ynWXFzPL1rlGI2s0oRw7UP5yTir5n890MUigIrDsk zA3uu2g8QdinM4+B36OB6W5BEPoH1yqALmoP39OJfN4rqGUrjdfTbLcsqUme4Z8t54ow3fe5lfC/c Fl9hCoKvjhE1chLSEIBX9qOh/De48gdBzb/HewRblhZ8sJd79WaorHbd18g64W02PKJcBAlkL+Lii 02q17F11RI0GEWM8Baan/tqBiUlho3AxoVa7WA6H4kQJXp8aOTGBtLmwjDzjftTk2ncaWEi5g6yYK Qt6fGg3Q==; 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 1oREim-0086MB-Bp; Thu, 25 Aug 2022 09:24:41 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.94.2) (envelope-from ) id 1oREie-0001ei-J0; Thu, 25 Aug 2022 09:24:32 -0600 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 Cc: Christoph Hellwig , Greg Kroah-Hartman , Dan Williams , Jason Gunthorpe , =?UTF-8?q?Christian=20K=C3=B6nig?= , John Hubbard , Don Dutile , Matthew Wilcox , Daniel Vetter , Minturn Dave B , Jason Ekstrand , Dave Hansen , Xiong Jianxin , Bjorn Helgaas , Ira Weiny , Robin Murphy , Martin Oliveira , Chaitanya Kulkarni , Ralph Campbell , Stephen Bates , Logan Gunthorpe Date: Thu, 25 Aug 2022 09:24:22 -0600 Message-Id: <20220825152425.6296-6-logang@deltatee.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220825152425.6296-1-logang@deltatee.com> References: <20220825152425.6296-1-logang@deltatee.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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, hch@lst.de, gregkh@linuxfoundation.org, 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, 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, sbates@raithlin.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [PATCH v9 5/8] 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) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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 | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) diff --git a/block/bio.c b/block/bio.c index 969607bc1f4d..ca09d79a0683 100644 --- a/block/bio.c +++ b/block/bio.c @@ -1200,6 +1200,7 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) unsigned short entries_left = bio->bi_max_vecs - bio->bi_vcnt; struct bio_vec *bv = bio->bi_io_vec + bio->bi_vcnt; struct page **pages = (struct page **)bv; + unsigned int flags = 0; ssize_t size, left; unsigned len, i = 0; size_t offset, trim; @@ -1213,6 +1214,10 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) BUILD_BUG_ON(PAGE_PTRS_PER_BVEC < 2); pages += entries_left * (PAGE_PTRS_PER_BVEC - 1); + if (bio->bi_bdev && bio->bi_bdev->bd_disk && + blk_queue_pci_p2pdma(bio->bi_bdev->bd_disk->queue)) + flags |= FOLL_PCI_P2PDMA; + /* * Each segment in the iov is required to be a block size multiple. * However, we may not be able to get the entire segment if it spans @@ -1220,8 +1225,9 @@ static int __bio_iov_iter_get_pages(struct bio *bio, struct iov_iter *iter) * result to ensure the bio's total size is correct. The remainder of * the iov data will be picked up in the next bio iteration. */ - size = iov_iter_get_pages2(iter, pages, UINT_MAX - bio->bi_iter.bi_size, - nr_pages, &offset); + size = iov_iter_get_pages_flags(iter, pages, + UINT_MAX - bio->bi_iter.bi_size, + nr_pages, &offset, flags); if (unlikely(size <= 0)) return size ? size : -EFAULT; -- 2.30.2