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 1A9C0C04A68 for ; Wed, 27 Jul 2022 16:24:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234505AbiG0QYB (ORCPT ); Wed, 27 Jul 2022 12:24:01 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235873AbiG0QXa (ORCPT ); Wed, 27 Jul 2022 12:23:30 -0400 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C6C8C4D4F4 for ; Wed, 27 Jul 2022 09:22:53 -0700 (PDT) Received: from eucas1p1.samsung.com (unknown [182.198.249.206]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20220727162251euoutp017972aa4920f2f3f43a3ab2f4ffd9d865~FvDSHin032487524875euoutp01n for ; 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Wed, 27 Jul 2022 16:22:49 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp1.samsung.com (KnoxPortal) with ESMTP id 20220727162249eusmtrp144e06ed4881c4884a2ac90fdf9241a94~FvDP-ilv30298902989eusmtrp1J; Wed, 27 Jul 2022 16:22:49 +0000 (GMT) X-AuditID: cbfec7f4-dd7ff70000002753-b6-62e1665983b9 Received: from eusmtip1.samsung.com ( [203.254.199.221]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 76.8D.09038.95661E26; Wed, 27 Jul 2022 17:22:49 +0100 (BST) Received: from localhost (unknown [106.210.248.8]) by eusmtip1.samsung.com (KnoxPortal) with ESMTPA id 20220727162248eusmtip15937a1bbdaa281a604501e0b83536562~FvDPpfQIK0065000650eusmtip1F; Wed, 27 Jul 2022 16:22:48 +0000 (GMT) From: Pankaj Raghav To: damien.lemoal@opensource.wdc.com, hch@lst.de, axboe@kernel.dk, snitzer@kernel.org, Johannes.Thumshirn@wdc.com Cc: matias.bjorling@wdc.com, gost.dev@samsung.com, linux-kernel@vger.kernel.org, hare@suse.de, linux-block@vger.kernel.org, pankydev8@gmail.com, bvanassche@acm.org, jaegeuk@kernel.org, dm-devel@redhat.com, linux-nvme@lists.infradead.org, Pankaj Raghav , Luis Chamberlain Subject: [PATCH v8 03/11] nvme: zns: Allow ZNS drives that have non-power_of_2 zone size Date: Wed, 27 Jul 2022 18:22:37 +0200 Message-Id: <20220727162245.209794-4-p.raghav@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220727162245.209794-1-p.raghav@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFrrHKsWRmVeSWpSXmKPExsWy7djPc7qRaQ+TDJ5us7JYfbefzWLah5/M Fr/Pnme22PtuNqvFzQM7mSz2LJrEZLFy9VEmiyfrZzFb/O26x2Sx95a2xeVdc9gs5i97ym4x oe0rs8WNCU8ZLT4vbWG3WHPzKYvFiVvSDoIel694e+ycdZfd4/LZUo9NqzrZPDYvqffYfbOB zWNn631Wj/f7rrJ59G1Zxeix+XS1x+dNch7tB7qZAniiuGxSUnMyy1KL9O0SuDI279/KXtAn UnGkczJLA+MlgS5GTg4JAROJpw9XMHcxcnEICaxglFg2fQoThPOFUeLiuyZGkCohgc+MEo/+ W8J0NH7dxQhRtJxRYt3KZ1DOc0aJ+8f2sXYxcnCwCWhJNHaygzSICBRLPHzXygJSwyxwgEni we0WNpCEsECUxJKrXWAbWARUJfq2LWICsXkFrCReTr/MDLFNXmLmpe9ggzgFrCU2T5kHVSMo cXLmExYQmxmopnnrbKj69ZwSCzeyQ9guEq2nprBC2MISr45vgYrLSJye3MMCYVdLPL3xG+x/ CYEWRon+nevZQB6QAFrWdyYHxGQW0JRYv0sfotxRonHBJSaICj6JG28FIS7gk5i0bTozRJhX oqNNCKJaSWLnzydQSyUkLjfNgVrqIdG/u5ltAqPiLCS/zELyyyyEvQsYmVcxiqeWFuempxYb 5aWW6xUn5haX5qXrJefnbmIEJsHT/45/2cG4/NVHvUOMTByMhxglOJiVRHgTou8nCfGmJFZW pRblxxeV5qQWH2KU5mBREudNztyQKCSQnliSmp2aWpBaBJNl4uCUamBazeAqMFlxhdJ/X5XW m8mLb7hu+agS5tX0ubBZUtdBp/rUsYUTjW1mrNgm82jtNZHXM7zOP75abCcm8s4qOfHx82dz BSa4/Hpds9uv+IxrmNWMpS9PpN1KmvFT875kl8/XfYUG71g/Td896Y3up8PMfEcS/qqJvfSM TTr10v3UuzTbg6KrBQVmVi/J+JdqLsS/VXmqpr7p53kTl71j0/D0sPrl3vf7qeeNR/t+li0r 3enw1oxZm9f2h8O8N8w/Lu8JVEp0Y5AzSZR2PFbZatlvvpZreYCZ1c+unI4Pdf//pMusemwj Kba0jver4HQ3Xw/3q6Ff3F3O5WTu+Fn7cMWBzohDv9Nm7FJTPvAmaIKiEktxRqKhFnNRcSIA 7/jcKfEDAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrDIsWRmVeSWpSXmKPExsVy+t/xu7qRaQ+TDJYc4LJYfbefzWLah5/M Fr/Pnme22PtuNqvFzQM7mSz2LJrEZLFy9VEmiyfrZzFb/O26x2Sx95a2xeVdc9gs5i97ym4x oe0rs8WNCU8ZLT4vbWG3WHPzKYvFiVvSDoIel694e+ycdZfd4/LZUo9NqzrZPDYvqffYfbOB zWNn631Wj/f7rrJ59G1Zxeix+XS1x+dNch7tB7qZAnii9GyK8ktLUhUy8otLbJWiDS2M9Awt LfSMTCz1DI3NY62MTJX07WxSUnMyy1KL9O0S9DI279/KXtAnUnGkczJLA+MlgS5GTg4JAROJ xq+7GLsYuTiEBJYySqzs38sOkZCQuL2wiRHCFpb4c62LDcQWEnjKKNE4PayLkYODTUBLorGT HcQUEaiUOPtFFmQMs8A5JombF6+xgcSFBSIkmlZxgHSyCKhK9G1bxARi8wpYSbycfpkZYrq8 xMxL38G2cgpYS2yeMo8JYpOVxLMHH9kg6gUlTs58wgJiMwPVN2+dzTyBUWAWktQsJKkFjEyr GEVSS4tz03OLjfSKE3OLS/PS9ZLzczcxAqN127GfW3Ywrnz1Ue8QIxMH4yFGCQ5mJRHehOj7 SUK8KYmVValF+fFFpTmpxYcYTYHunsgsJZqcD0wXeSXxhmYGpoYmZpYGppZmxkrivJ4FHYlC AumJJanZqakFqUUwfUwcnFINTFFz49vkKwO6XskdSQ/Tr2RW985y+Zr8SaJ1StyL9RcX7N9f oxV8daXFnZqD22SU771hlJfkeGYYYcRwIilsFStPscKycsNPaduiKl7LyL++wcz7bPNBT7GJ eunr202y9oXFHyldmHfrjrhaSuSXdalxEUWz76f96w+YEvtycqG/UnfvTM3jm4/sCjqlXHM6 Ithc0evZrvaTFeFT/S2PxhTPOVbYfsk8vO2GqN+KK7+DFsZ9up82XzV4gvvOhkNbls0U1Do8 lZstjl9ytmndzZD2G5LFyb+1q7pCtn3JV979XneXzw2lC68uPbgawqhxc3Ogsl7IeaumRsXt K5mFdRqDQ6YfW9ifXGj8XMZciaU4I9FQi7moOBEAclS0ql8DAAA= X-CMS-MailID: 20220727162249eucas1p28fa44c840e590f6f1b53e0cc12ee3771 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20220727162249eucas1p28fa44c840e590f6f1b53e0cc12ee3771 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220727162249eucas1p28fa44c840e590f6f1b53e0cc12ee3771 References: <20220727162245.209794-1-p.raghav@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-block@vger.kernel.org Remove the condition which disallows non-power_of_2 zone size ZNS drive to be updated and use generic method to calculate number of zones instead of relying on log and shift based calculation on zone size. The power_of_2 calculation has been replaced directly with generic calculation without special handling. Both modified functions are not used in hot paths, they are only used during initialization & revalidation of the ZNS device. As rounddown macro from math.h does not work for 32 bit architectures, round down operation is open coded. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Reviewed-by: Hannes Reinecke Signed-off-by: Pankaj Raghav --- drivers/nvme/host/zns.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 12316ab51bda..73e4ad495ae8 100644 --- a/drivers/nvme/host/zns.c +++ b/drivers/nvme/host/zns.c @@ -101,13 +101,6 @@ int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf) } ns->zsze = nvme_lba_to_sect(ns, le64_to_cpu(id->lbafe[lbaf].zsze)); - if (!is_power_of_2(ns->zsze)) { - dev_warn(ns->ctrl->device, - "invalid zone size:%llu for namespace:%u\n", - ns->zsze, ns->head->ns_id); - status = -ENODEV; - goto free_data; - } disk_set_zoned(ns->disk, BLK_ZONED_HM); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); @@ -129,7 +122,7 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, sizeof(struct nvme_zone_descriptor); nr_zones = min_t(unsigned int, nr_zones, - get_capacity(ns->disk) >> ilog2(ns->zsze)); + div64_u64(get_capacity(ns->disk), ns->zsze)); bufsize = sizeof(struct nvme_zone_report) + nr_zones * sizeof(struct nvme_zone_descriptor); @@ -182,6 +175,7 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, int ret, zone_idx = 0; unsigned int nz, i; size_t buflen; + u64 remainder = 0; if (ns->head->ids.csi != NVME_CSI_ZNS) return -EINVAL; @@ -197,7 +191,11 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL; c.zmr.pr = NVME_REPORT_ZONE_PARTIAL; - sector &= ~(ns->zsze - 1); + /* + * Round down the sector value to the nearest zone start + */ + div64_u64_rem(sector, ns->zsze, &remainder); + sector -= remainder; while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) { memset(report, 0, buflen); -- 2.25.1 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 us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 6901DC04A68 for ; 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Similar Internal Domain=false; Similar Monitored External Domain=false; Custom External Domain=false; Mimecast External Domain=false; Newly Observed Domain=false; Internal User Name=false; Custom Display Name List=false; Reply-to Address Mismatch=false; Targeted Threat Dictionary=false; Mimecast Threat Dictionary=false; Custom Threat Dictionary=false X-Scanned-By: MIMEDefang 2.85 on 10.11.54.7 Subject: [dm-devel] [PATCH v8 03/11] nvme: zns: Allow ZNS drives that have non-power_of_2 zone size X-BeenThere: dm-devel@redhat.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: device-mapper development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Pankaj Raghav , bvanassche@acm.org, pankydev8@gmail.com, gost.dev@samsung.com, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-block@vger.kernel.org, dm-devel@redhat.com, jaegeuk@kernel.org, matias.bjorling@wdc.com, Luis Chamberlain Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.79 on 10.11.54.5 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=dm-devel-bounces@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Remove the condition which disallows non-power_of_2 zone size ZNS drive to be updated and use generic method to calculate number of zones instead of relying on log and shift based calculation on zone size. The power_of_2 calculation has been replaced directly with generic calculation without special handling. Both modified functions are not used in hot paths, they are only used during initialization & revalidation of the ZNS device. As rounddown macro from math.h does not work for 32 bit architectures, round down operation is open coded. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Reviewed-by: Hannes Reinecke Signed-off-by: Pankaj Raghav --- drivers/nvme/host/zns.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 12316ab51bda..73e4ad495ae8 100644 --- a/drivers/nvme/host/zns.c +++ b/drivers/nvme/host/zns.c @@ -101,13 +101,6 @@ int nvme_update_zone_info(struct nvme_ns *ns, unsigned lbaf) } ns->zsze = nvme_lba_to_sect(ns, le64_to_cpu(id->lbafe[lbaf].zsze)); - if (!is_power_of_2(ns->zsze)) { - dev_warn(ns->ctrl->device, - "invalid zone size:%llu for namespace:%u\n", - ns->zsze, ns->head->ns_id); - status = -ENODEV; - goto free_data; - } disk_set_zoned(ns->disk, BLK_ZONED_HM); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); @@ -129,7 +122,7 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, sizeof(struct nvme_zone_descriptor); nr_zones = min_t(unsigned int, nr_zones, - get_capacity(ns->disk) >> ilog2(ns->zsze)); + div64_u64(get_capacity(ns->disk), ns->zsze)); bufsize = sizeof(struct nvme_zone_report) + nr_zones * sizeof(struct nvme_zone_descriptor); @@ -182,6 +175,7 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, int ret, zone_idx = 0; unsigned int nz, i; size_t buflen; + u64 remainder = 0; if (ns->head->ids.csi != NVME_CSI_ZNS) return -EINVAL; @@ -197,7 +191,11 @@ int nvme_ns_report_zones(struct nvme_ns *ns, sector_t sector, c.zmr.zrasf = NVME_ZRASF_ZONE_REPORT_ALL; c.zmr.pr = NVME_REPORT_ZONE_PARTIAL; - sector &= ~(ns->zsze - 1); + /* + * Round down the sector value to the nearest zone start + */ + div64_u64_rem(sector, ns->zsze, &remainder); + sector -= remainder; while (zone_idx < nr_zones && sector < get_capacity(ns->disk)) { memset(report, 0, buflen); -- 2.25.1 -- dm-devel mailing list dm-devel@redhat.com https://listman.redhat.com/mailman/listinfo/dm-devel