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=-8.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT 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 4F761C48BE3 for ; Thu, 20 Jun 2019 16:14:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 29ED62084A for ; Thu, 20 Jun 2019 16:14:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732109AbfFTQOY (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 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-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-pci-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org 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 *); -- 2.20.1