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=-9.8 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,UNPARSEABLE_RELAY,URIBL_BLOCKED, USER_AGENT_GIT 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 1941BC83000 for ; Tue, 28 Apr 2020 13:12:41 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id DE4B8206A1 for ; Tue, 28 Apr 2020 13:12:40 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="pysmMMNf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DE4B8206A1 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mellanox.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aK+8C2HlIvBKRGy4sC6qRf1b4YqkPg46cpIuZGea1TY=; b=pysmMMNfGu3rk8 Tl49WyJVgZ1oWBW/8yohaoBakT7EngRJ3bB9ilBT6oBwa0Y3YH7BQcpVI5IY5XpLkU+eRqLkLl+7x fJdRcpGSe4aFNZQcPyix+g3LlP83aWvpmYxVXg/+cTgXWqDVoDjdklxevJCQVSBAWMu0geCQvhxj/ cQX+Iir+az1nIlhFBuyori0e7c99RRleqXwvPU77idLFG+gWSV9IjWewOM5H8AV1flGR/wImzAEsA BoZ0coBBqt10jCrYiOBwNothbGTmO6IZwWG2eK4qcBtl/Ix7aWM3YnCVlE3EOlTnMeUS4CveyLVqh UE2yMr5E57DAYg5W/bnQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTQ2P-00041Q-CS; Tue, 28 Apr 2020 13:12:37 +0000 Received: from mail-il-dmz.mellanox.com ([193.47.165.129] helo=mellanox.co.il) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jTQ1X-0003HY-SJ for linux-nvme@lists.infradead.org; Tue, 28 Apr 2020 13:11:48 +0000 Received: from Internal Mail-Server by MTLPINE1 (envelope-from maxg@mellanox.com) with ESMTPS (AES256-SHA encrypted); 28 Apr 2020 16:11:38 +0300 Received: from mtr-vdi-031.wap.labs.mlnx. (mtr-vdi-031.wap.labs.mlnx [10.209.102.136]) by labmailer.mlnx (8.13.8/8.13.8) with ESMTP id 03SDBZZ9028635; Tue, 28 Apr 2020 16:11:38 +0300 From: Max Gurtovoy To: maxg@mellanox.com, linux-nvme@lists.infradead.org, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, martin.petersen@oracle.com, jsmart2021@gmail.com, axboe@kernel.dk Subject: [PATCH 14/15] nvmet: add metadata support for block devices Date: Tue, 28 Apr 2020 16:11:34 +0300 Message-Id: <20200428131135.211521-15-maxg@mellanox.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20200428131135.211521-1-maxg@mellanox.com> References: <20200428131135.211521-1-maxg@mellanox.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200428_061144_338621_BF19CD6F X-CRM114-Status: GOOD ( 14.05 ) X-BeenThere: linux-nvme@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: vladimirk@mellanox.com, shlomin@mellanox.com, israelr@mellanox.com, idanb@mellanox.com, oren@mellanox.com, nitzanc@mellanox.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-nvme" Errors-To: linux-nvme-bounces+linux-nvme=archiver.kernel.org@lists.infradead.org From: Israel Rukshin Allocate the metadata SGL buffers and set metadata fields for the request. Then create a block IO request for the metadata from the protection SG list. Signed-off-by: Israel Rukshin Signed-off-by: Max Gurtovoy --- drivers/nvme/target/core.c | 90 +++++++++++++++++++++++++++++++-------- drivers/nvme/target/io-cmd-bdev.c | 85 +++++++++++++++++++++++++++++++++++- drivers/nvme/target/nvmet.h | 3 ++ 3 files changed, 159 insertions(+), 19 deletions(-) diff --git a/drivers/nvme/target/core.c b/drivers/nvme/target/core.c index a57ab0c..c1456ce 100644 --- a/drivers/nvme/target/core.c +++ b/drivers/nvme/target/core.c @@ -884,8 +884,11 @@ bool nvmet_req_init(struct nvmet_req *req, struct nvmet_cq *cq, req->sq = sq; req->ops = ops; req->sg = NULL; + req->md_sg = NULL; req->sg_cnt = 0; + req->md_sg_cnt = 0; req->transfer_len = 0; + req->md_len = 0; req->cqe->status = 0; req->cqe->sq_head = 0; req->ns = NULL; @@ -970,9 +973,67 @@ bool nvmet_check_data_len_lte(struct nvmet_req *req, size_t data_len) return true; } +void nvmet_req_free_p2pmem_sgls(struct nvmet_req *req) +{ + pci_p2pmem_free_sgl(req->p2p_dev, req->sg); + if (req->md_sg) + pci_p2pmem_free_sgl(req->p2p_dev, req->md_sg); +} + +static int nvmet_req_alloc_p2pmem_sgls(struct nvmet_req *req, int data_len, + struct pci_dev *p2p_dev) +{ + req->sg = pci_p2pmem_alloc_sgl(p2p_dev, &req->sg_cnt, data_len); + if (!req->sg) + goto out_err; + + if (req->md_len) { + req->md_sg = pci_p2pmem_alloc_sgl(p2p_dev, &req->md_sg_cnt, + req->md_len); + if (!req->md_sg) + goto out_free_sg; + } + req->p2p_dev = p2p_dev; + return 0; + +out_free_sg: + pci_p2pmem_free_sgl(p2p_dev, req->sg); +out_err: + return -ENOMEM; +} + +void nvmet_req_free_mem_sgls(struct nvmet_req *req) +{ + sgl_free(req->sg); + if (req->md_sg) + sgl_free(req->md_sg); +} + +static int nvmet_req_alloc_mem_sgls(struct nvmet_req *req, int data_len) +{ + req->sg = sgl_alloc(data_len, GFP_KERNEL, &req->sg_cnt); + if (unlikely(!req->sg)) + goto out; + + if (req->md_len) { + req->md_sg = sgl_alloc(req->md_len, GFP_KERNEL, + &req->md_sg_cnt); + if (unlikely(!req->md_sg)) + goto out_free; + } + + return 0; + +out_free: + sgl_free(req->sg); +out: + return -ENOMEM; +} + int nvmet_req_alloc_sgl(struct nvmet_req *req) { struct pci_dev *p2p_dev = NULL; + int data_len = req->transfer_len - req->md_len; if (IS_ENABLED(CONFIG_PCI_P2PDMA)) { if (req->sq->ctrl && req->ns) @@ -981,37 +1042,32 @@ int nvmet_req_alloc_sgl(struct nvmet_req *req) req->p2p_dev = NULL; if (req->sq->qid && p2p_dev) { - req->sg = pci_p2pmem_alloc_sgl(p2p_dev, &req->sg_cnt, - req->transfer_len); - if (req->sg) { - req->p2p_dev = p2p_dev; + int ret = nvmet_req_alloc_p2pmem_sgls(req, data_len, + p2p_dev); + if (!ret) return 0; - } } - - /* - * If no P2P memory was available we fallback to using - * regular memory - */ } - req->sg = sgl_alloc(req->transfer_len, GFP_KERNEL, &req->sg_cnt); - if (unlikely(!req->sg)) - return -ENOMEM; - - return 0; + /* + * If no P2P memory was available/enabled we fallback to using regular + * memory. + */ + return nvmet_req_alloc_mem_sgls(req, data_len); } EXPORT_SYMBOL_GPL(nvmet_req_alloc_sgl); void nvmet_req_free_sgl(struct nvmet_req *req) { if (req->p2p_dev) - pci_p2pmem_free_sgl(req->p2p_dev, req->sg); + nvmet_req_free_p2pmem_sgls(req); else - sgl_free(req->sg); + nvmet_req_free_mem_sgls(req); req->sg = NULL; + req->md_sg = NULL; req->sg_cnt = 0; + req->md_sg_cnt = 0; } EXPORT_SYMBOL_GPL(nvmet_req_free_sgl); diff --git a/drivers/nvme/target/io-cmd-bdev.c b/drivers/nvme/target/io-cmd-bdev.c index d265cf5..4243156 100644 --- a/drivers/nvme/target/io-cmd-bdev.c +++ b/drivers/nvme/target/io-cmd-bdev.c @@ -174,6 +174,61 @@ static void nvmet_bio_done(struct bio *bio) bio_put(bio); } +#ifdef CONFIG_BLK_DEV_INTEGRITY +static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, + struct sg_mapping_iter *miter) +{ + struct blk_integrity *bi; + struct bio_integrity_payload *bip; + struct block_device *bdev = req->ns->bdev; + int rc; + size_t resid, len; + + bi = bdev_get_integrity(bdev); + if (unlikely(!bi)) { + pr_err("Unable to locate bio_integrity\n"); + return -ENODEV; + } + + bip = bio_integrity_alloc(bio, GFP_NOIO, + min_t(unsigned int, req->md_sg_cnt, BIO_MAX_PAGES)); + if (IS_ERR(bip)) { + pr_err("Unable to allocate bio_integrity_payload\n"); + return PTR_ERR(bip); + } + + bip->bip_iter.bi_size = bio_integrity_bytes(bi, bio_sectors(bio)); + /* virtual start sector must be in integrity interval units */ + bip_set_seed(bip, bio->bi_iter.bi_sector >> + (bi->interval_exp - SECTOR_SHIFT)); + + resid = bip->bip_iter.bi_size; + while (resid > 0 && sg_miter_next(miter)) { + len = min_t(size_t, miter->length, resid); + rc = bio_integrity_add_page(bio, miter->page, len, + offset_in_page(miter->addr)); + if (unlikely(rc != len)) { + pr_err("bio_integrity_add_page() failed; %d\n", rc); + sg_miter_stop(miter); + return -ENOMEM; + } + + resid -= len; + if (len < miter->length) + miter->consumed -= miter->length - len; + } + sg_miter_stop(miter); + + return 0; +} +#else +static int nvmet_bdev_alloc_bip(struct nvmet_req *req, struct bio *bio, + struct sg_mapping_iter *miter) +{ + return -EINVAL; +} +#endif /* CONFIG_BLK_DEV_INTEGRITY */ + static void nvmet_bdev_execute_rw(struct nvmet_req *req) { int sg_cnt = req->sg_cnt; @@ -181,9 +236,11 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) struct scatterlist *sg; struct blk_plug plug; sector_t sector; - int op, i; + int op, i, rc; + struct sg_mapping_iter prot_miter; - if (!nvmet_check_transfer_len(req, nvmet_rw_data_len(req))) + if (!nvmet_check_transfer_len(req, + nvmet_rw_data_len(req) + req->md_len)) return; if (!req->sg_cnt) { @@ -218,11 +275,25 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) bio->bi_opf = op; blk_start_plug(&plug); + if (req->md_len) + sg_miter_start(&prot_miter, req->md_sg, req->md_sg_cnt, + op == REQ_OP_READ ? SG_MITER_FROM_SG : + SG_MITER_TO_SG); + for_each_sg(req->sg, sg, req->sg_cnt, i) { while (bio_add_page(bio, sg_page(sg), sg->length, sg->offset) != sg->length) { struct bio *prev = bio; + if (req->md_len) { + rc = nvmet_bdev_alloc_bip(req, bio, + &prot_miter); + if (unlikely(rc)) { + bio_io_error(bio); + return; + } + } + bio = bio_alloc(GFP_KERNEL, min(sg_cnt, BIO_MAX_PAGES)); bio_set_dev(bio, req->ns->bdev); bio->bi_iter.bi_sector = sector; @@ -236,6 +307,14 @@ static void nvmet_bdev_execute_rw(struct nvmet_req *req) sg_cnt--; } + if (req->md_len) { + rc = nvmet_bdev_alloc_bip(req, bio, &prot_miter); + if (unlikely(rc)) { + bio_io_error(bio); + return; + } + } + submit_bio(bio); blk_finish_plug(&plug); } @@ -363,6 +442,8 @@ u16 nvmet_bdev_parse_io_cmd(struct nvmet_req *req) case nvme_cmd_read: case nvme_cmd_write: req->execute = nvmet_bdev_execute_rw; + if (req->sq->ctrl->pi_support && nvmet_ns_has_pi(req->ns)) + req->md_len = nvmet_rw_md_len(req); return 0; case nvme_cmd_flush: req->execute = nvmet_bdev_execute_flush; diff --git a/drivers/nvme/target/nvmet.h b/drivers/nvme/target/nvmet.h index ccdf820..7069520 100644 --- a/drivers/nvme/target/nvmet.h +++ b/drivers/nvme/target/nvmet.h @@ -309,6 +309,7 @@ struct nvmet_req { struct nvmet_cq *cq; struct nvmet_ns *ns; struct scatterlist *sg; + struct scatterlist *md_sg; struct bio_vec inline_bvec[NVMET_MAX_INLINE_BIOVEC]; union { struct { @@ -322,8 +323,10 @@ struct nvmet_req { } f; }; int sg_cnt; + int md_sg_cnt; /* data length as parsed from the SGL descriptor: */ size_t transfer_len; + size_t md_len; struct nvmet_port *port; -- 1.8.3.1 _______________________________________________ linux-nvme mailing list linux-nvme@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-nvme