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 07E59C43219 for ; Fri, 6 May 2022 08:11:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1389861AbiEFIPO (ORCPT ); Fri, 6 May 2022 04:15:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:59566 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1389835AbiEFIPG (ORCPT ); Fri, 6 May 2022 04:15:06 -0400 Received: from mailout1.w1.samsung.com (mailout1.w1.samsung.com [210.118.77.11]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 367D967D28 for ; Fri, 6 May 2022 01:11:18 -0700 (PDT) Received: from eucas1p2.samsung.com (unknown [182.198.249.207]) by mailout1.w1.samsung.com (KnoxPortal) with ESMTP id 20220506081111euoutp01665c812a21806f6dcf5d921ea5c8ae3a~sdcmJwYRA2197721977euoutp01O for ; 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Fri, 6 May 2022 08:11:09 +0000 (GMT) Received: from eusmgms2.samsung.com (unknown [182.198.249.180]) by eusmtrp2.samsung.com (KnoxPortal) with ESMTP id 20220506081109eusmtrp2db398a0a3f09537f71805983a29bb2c9~sdcj_iEtg2593625936eusmtrp2V; Fri, 6 May 2022 08:11:09 +0000 (GMT) X-AuditID: cbfec7f4-471ff7000000269f-2d-6274d81df581 Received: from eusmtip2.samsung.com ( [203.254.199.222]) by eusmgms2.samsung.com (EUCPMTA) with SMTP id 9D.E9.09404.D18D4726; Fri, 6 May 2022 09:11:09 +0100 (BST) Received: from localhost (unknown [106.210.248.174]) by eusmtip2.samsung.com (KnoxPortal) with ESMTPA id 20220506081109eusmtip22afa82e359d99dbc946388ce73357abc~sdcjmtyWb1925719257eusmtip28; Fri, 6 May 2022 08:11:09 +0000 (GMT) From: Pankaj Raghav To: jaegeuk@kernel.org, hare@suse.de, dsterba@suse.com, axboe@kernel.dk, hch@lst.de, damien.lemoal@opensource.wdc.com, snitzer@kernel.org Cc: Chris Mason , Josef Bacik , bvanassche@acm.org, linux-fsdevel@vger.kernel.org, matias.bjorling@wdc.com, Jens Axboe , gost.dev@samsung.com, jonathan.derrick@linux.dev, jiangbo.365@bytedance.com, linux-nvme@lists.infradead.org, dm-devel@redhat.com, Naohiro Aota , linux-kernel@vger.kernel.org, Johannes Thumshirn , Sagi Grimberg , Alasdair Kergon , linux-block@vger.kernel.org, Chaitanya Kulkarni , Keith Busch , linux-btrfs@vger.kernel.org, Pankaj Raghav , Luis Chamberlain Subject: [PATCH v3 03/11] nvme: zns: Allow ZNS drives that have non-power_of_2 zone size Date: Fri, 6 May 2022 10:10:57 +0200 Message-Id: <20220506081105.29134-4-p.raghav@samsung.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220506081105.29134-1-p.raghav@samsung.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Brightmail-Tracker: H4sIAAAAAAAAA01SbUxTVxjeuff29lKtu7RGDiox6z4SIYAYNQdcHG5k3m3qdMk+QqZb0Tsg FjAtzDl+WIGBgCsFYYwWpDD5BosUyLCwkW7jGwUqs3YDSgdxYFZorDIsgVluzfz3PO/7POd9 nzeHwkXN5FYqPjGZlSdKZRJSQLT3LN8KDrAkx+yaHYpA+oEeHK119pCoYSKPRN8tLuOoIO97 PnIP38ZRl0PLQyP/XsTQve4ODHVWFmCoruE3DM3oNTi63L1IoLqMaRytTIehaZeVQAWm3wGa HddgqMsahMb+quWjzq5+AplvlpKovHqWj9SZj3BkUc8ClN9r4KGHVRl8dP3BAoH6rNsiAxjz nfeY1b5GkslPd/CZ25M3CMY8nMK01GeTTIWyCGcM1y4wxntKkvk23UEyHd9M8ZiFn8ZJRtVa Dxh96zjBGAZTGbXhBu+YKFrw+mlWFv8lKw898Lkgrk1XiJ1t3fKV09pNKEGTKAf4UJDeA92P ikAOEFAiuhZAq82Ic8QFYPr1uzyOPASw26HkP7MUXs73NmoAbG4ZwjgyB+DAip3MARRF0oHw YjbfU99M5wKYN5W17sZpAw+ONH3hwWI6Gg45npAeTNCvQpPSgnmwkA6H7UsOgpu2A5aMLa17 fegImHZljuQ0vrC/ZIbg3twB09u063tDuk4AK1ddOGeOguZMTzoPFsP53lZvhO1wraMc43Aq nLW4veaMp5t26NcTQHo/VA3JPBCnd0L9zVBOfhCOZhZ5FZug5R9fboVNsKC9GOfKQngp03te CexYnvEOhdCcVupNxUDzsg2owUua58Jonguj+X+uDuD1wI9NUSTEsordiey5EIU0QZGSGBty KimhBTz91IOrva4fQc28M8QEMAqYAKRwyWahWJMcIxKelp7/mpUnfSZPkbEKE9hGERI/4an4 ZqmIjpUms2dY9iwrf9bFKJ+tSkwdpG1q+2H0QvEH9wecR97Ya2jMov3r3+7bV1iXdAK+sm97 SdYLbXbV3NVjh29Zjzv/viTQ8Wt507ZfUh4Yh2Kr84xXQqePv7Pr/YmR4I1RfknnbFPqT8p+ vnu0XTXfvNasN1L+47K33AcrMQHqx87nlFVENEoCI13DCSFX7ftVWF3aZPnRqABjzUp9bont 0MbKl2NOssMr2tQ3x/6Y3G0/Qr0mNsw1sNc+HgkN+mgyYDhr8PHh4BNnFtOK3St2fUV4T+Sn 0d3ZE6Nhj+N0YVAn/nXvu1V3qsP9D6S+uHB/6sMtMmuj3XeprHenUFwqO9RWtUHmjMzVxmyw Gf9UmPY8GTgpIRRx0rBAXK6Q/gdbsHbUQwQAAA== X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFlrAKsWRmVeSWpSXmKPExsVy+t/xe7qyN0qSDLr3ilmsP3WM2eL/nmNs Fqvv9rNZTPvwk9liUv8MdovfZ88zW+x9N5vV4sKPRiaLmwd2MlnsWTSJyWLl6qNMFk/Wz2K2 6DnwgcViZctDZos/Dw0tHn65xWIx6dA1RounV2cxWey9pW1x6fEKdos9e0+yWFzeNYfNYv6y p+wWE9q+MlvcmPCU0WLi8c2sFp+XtrBbrHv9nsXixC1pB1mPy1e8Pf6dWMPmMbH5HbvH+Xsb WTwuny312LSqk81jYcNUZo/NS+o9dt9sYPPobX7H5rGz9T6rx/t9V9k8+rasYvRYv+Uqi8fm 09UeEzZvZA0QitKzKcovLUlVyMgvLrFVija0MNIztLTQMzKx1DM0No+1MjJV0rezSUnNySxL LdK3S9DL2LpgClPBFrGKj7cOsDQwrhXqYuTkkBAwkZjSM5G1i5GLQ0hgKaPEk5cfGSESEhK3 FzZB2cISf651sUEUPWeU+HX9IFMXIwcHm4CWRGMnO0hcRGAqo8SldSdZQBxmgdOsEls3HWAC 6RYWiJDoO3UWzGYRUJU41HADzOYVsJTY9v0dC8QGeYmZl76zg9icAlYSTZNfsoHYQkA185fs YYWoF5Q4OfMJWD0zUH3z1tnMExgFZiFJzUKSWsDItIpRJLW0ODc9t9hIrzgxt7g0L10vOT93 EyMwqWw79nPLDsaVrz7qHWJk4mA8xCjBwawkwis8qyRJiDclsbIqtSg/vqg0J7X4EKMp0N0T maVEk/OBaS2vJN7QzMDU0MTM0sDU0sxYSZzXs6AjUUggPbEkNTs1tSC1CKaPiYNTqoGJYZaH oMzujjB13YSji04LiYfp7lthlhT+O1X7+ekjgseaumLvrX8l/79ad+f3PXdkDvwT6Hu7sosz iuPlCo7cK1LMCa33/8pKeZrNmC+9oOXLF7ZA5+sRfHMr8kK35UyccUNHQ3D3Xu35k2WjH8st 6aiLSpn13HOVjsIB39Apz0LedrLUzOc8x/XY5HZFYrV9uxX35lsLb7w+6/SjMcLW6v7TSzlZ s7bkTp0lHF4dvO3o/oNqx99qtiyUYEw7Lv+o3/ju0XqrH7Hsa63vrC//cjLgupHL9tv3J2+d lPR5zgGf830h6geOLKsrtl5nPKPQ1P7m1R69a8tzzrAkZEUd1f1b9qaMZ03noT32BkcalFiK MxINtZiLihMBVhMFw7MDAAA= X-CMS-MailID: 20220506081109eucas1p26bbb68a1740b1af923ed862a93112780 X-Msg-Generator: CA Content-Type: text/plain; charset="utf-8" X-RootMTR: 20220506081109eucas1p26bbb68a1740b1af923ed862a93112780 X-EPHeader: CA CMS-TYPE: 201P X-CMS-RootMailID: 20220506081109eucas1p26bbb68a1740b1af923ed862a93112780 References: <20220506081105.29134-1-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. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Signed-off-by: Pankaj Raghav --- drivers/nvme/host/zns.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 9f81beb4d..65d2aa68a 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; - } blk_queue_set_zoned(ns->disk, BLK_ZONED_HM); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); @@ -128,8 +121,13 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, const size_t min_bufsize = sizeof(struct nvme_zone_report) + sizeof(struct nvme_zone_descriptor); + /* + * Division is used to calculate nr_zones with no special handling + * for power of 2 zone sizes as this function is not invoked in a + * hot path + */ 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 +180,7 @@ 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 +196,14 @@ 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); + /* + * rounddown the sector value to the nearest zone size. roundown macro + * provided in math.h will not work for 32 bit architectures. + * Division is used here with no special handling for power of 2 + * zone sizes as this function is not invoked in a hot path + */ + 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-74.mimecast.com (us-smtp-delivery-74.mimecast.com [170.10.129.74]) (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 36F55C433EF 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 10.11.54.9 Subject: [dm-devel] [PATCH v3 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: jiangbo.365@bytedance.com, linux-nvme@lists.infradead.org, Chris Mason , dm-devel@redhat.com, Alasdair Kergon , Naohiro Aota , bvanassche@acm.org, gost.dev@samsung.com, jonathan.derrick@linux.dev, Pankaj Raghav , Chaitanya Kulkarni , Josef Bacik , linux-block@vger.kernel.org, Keith Busch , matias.bjorling@wdc.com, Sagi Grimberg , Jens Axboe , linux-kernel@vger.kernel.org, Luis Chamberlain , linux-fsdevel@vger.kernel.org, Johannes Thumshirn , linux-btrfs@vger.kernel.org Errors-To: dm-devel-bounces@redhat.com Sender: "dm-devel" X-Scanned-By: MIMEDefang 2.85 on 10.11.54.10 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. Reviewed-by: Luis Chamberlain Reviewed by: Adam Manzanares Signed-off-by: Pankaj Raghav --- drivers/nvme/host/zns.c | 24 +++++++++++++++--------- 1 file changed, 15 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 9f81beb4d..65d2aa68a 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; - } blk_queue_set_zoned(ns->disk, BLK_ZONED_HM); blk_queue_flag_set(QUEUE_FLAG_ZONE_RESETALL, q); @@ -128,8 +121,13 @@ static void *nvme_zns_alloc_report_buffer(struct nvme_ns *ns, const size_t min_bufsize = sizeof(struct nvme_zone_report) + sizeof(struct nvme_zone_descriptor); + /* + * Division is used to calculate nr_zones with no special handling + * for power of 2 zone sizes as this function is not invoked in a + * hot path + */ 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 +180,7 @@ 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 +196,14 @@ 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); + /* + * rounddown the sector value to the nearest zone size. roundown macro + * provided in math.h will not work for 32 bit architectures. + * Division is used here with no special handling for power of 2 + * zone sizes as this function is not invoked in a hot path + */ + 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