From patchwork Thu Jun 20 16:12:21 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Logan Gunthorpe X-Patchwork-Id: 11007295 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DFDED112C for ; Thu, 20 Jun 2019 16:14:25 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D0FEC28765 for ; Thu, 20 Jun 2019 16:14:25 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C51B0287B4; Thu, 20 Jun 2019 16:14:25 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-7.9 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_HI autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 70F9728756 for ; Thu, 20 Jun 2019 16:14:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732114AbfFTQOY (ORCPT ); Thu, 20 Jun 2019 12:14:24 -0400 Received: from ale.deltatee.com ([207.54.116.67]:59446 "EHLO ale.deltatee.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732134AbfFTQM5 (ORCPT ); Thu, 20 Jun 2019 12:12:57 -0400 Received: from cgy1-donard.priv.deltatee.com ([172.16.1.31]) by ale.deltatee.com with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hdzg6-00046Q-68; Thu, 20 Jun 2019 10:12:54 -0600 Received: from gunthorp by cgy1-donard.priv.deltatee.com with local (Exim 4.89) (envelope-from ) id 1hdzg4-0005wK-LN; Thu, 20 Jun 2019 10:12:44 -0600 From: Logan Gunthorpe To: linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, linux-nvme@lists.infradead.org, linux-pci@vger.kernel.org, linux-rdma@vger.kernel.org Cc: Jens Axboe , Christoph Hellwig , Bjorn Helgaas , Dan Williams , Sagi Grimberg , Keith Busch , Jason Gunthorpe , Stephen Bates , Logan Gunthorpe Date: Thu, 20 Jun 2019 10:12:21 -0600 Message-Id: <20190620161240.22738-10-logang@deltatee.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190620161240.22738-1-logang@deltatee.com> References: <20190620161240.22738-1-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-rdma@vger.kernel.org, axboe@kernel.dk, hch@lst.de, bhelgaas@google.com, dan.j.williams@intel.com, sagi@grimberg.me, kbusch@kernel.org, jgg@ziepe.ca, sbates@raithlin.com, logang@deltatee.com X-SA-Exim-Mail-From: gunthorp@deltatee.com Subject: [RFC PATCH 09/28] block: Introduce vec_gap_to_prev() X-SA-Exim-Version: 4.2.1 (built Tue, 02 Aug 2016 21:08:31 +0000) X-SA-Exim-Scanned: Yes (on ale.deltatee.com) Sender: linux-rdma-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rdma@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Introduce vec_gap_to_prev() which is a more general form of bvec_gap_to_prev(). In order to support splitting dma_vecs we will need to do a similar calcualtion using the DMA address and length. Signed-off-by: Logan Gunthorpe --- block/blk.h | 21 +++++++++++++++++++-- 1 file changed, 19 insertions(+), 2 deletions(-) diff --git a/block/blk.h b/block/blk.h index 4142383eed7a..c5512fefe703 100644 --- a/block/blk.h +++ b/block/blk.h @@ -98,11 +98,19 @@ static inline bool dmavec_phys_mergeable(struct request_queue *q, vec2->dv_addr, vec2->dv_len); } +static inline bool __vec_gap_to_prev(struct request_queue *q, + unsigned int prv_offset, unsigned int prv_len, + unsigned int nxt_offset) +{ + return (nxt_offset & queue_virt_boundary(q)) || + ((prv_offset + prv_len) & queue_virt_boundary(q)); +} + static inline bool __bvec_gap_to_prev(struct request_queue *q, struct bio_vec *bprv, unsigned int offset) { - return (offset & queue_virt_boundary(q)) || - ((bprv->bv_offset + bprv->bv_len) & queue_virt_boundary(q)); + return __vec_gap_to_prev(q, bprv->bv_offset, bprv->bv_len, + offset); } /* @@ -117,6 +125,15 @@ static inline bool bvec_gap_to_prev(struct request_queue *q, return __bvec_gap_to_prev(q, bprv, offset); } +static inline bool vec_gap_to_prev(struct request_queue *q, + unsigned int prv_offset, unsigned int prv_len, + unsigned int nxt_offset) +{ + if (!queue_virt_boundary(q)) + return false; + return __vec_gap_to_prev(q, prv_offset, prv_len, nxt_offset); +} + #ifdef CONFIG_BLK_DEV_INTEGRITY void blk_flush_integrity(void); bool __bio_integrity_endio(struct bio *);