From: Pankaj Raghav <p.raghav@samsung.com> To: hch@lst.de, snitzer@redhat.com, damien.lemoal@opensource.wdc.com, axboe@kernel.dk Cc: bvanassche@acm.org, linux-kernel@vger.kernel.org, jiangbo.365@bytedance.com, hare@suse.de, pankydev8@gmail.com, dm-devel@redhat.com, jonathan.derrick@linux.dev, gost.dev@samsung.com, dsterba@suse.com, jaegeuk@kernel.org, linux-nvme@lists.infradead.org, Johannes.Thumshirn@wdc.com, linux-block@vger.kernel.org, Pankaj Raghav <p.raghav@samsung.com>, Luis Chamberlain <mcgrof@kernel.org> Subject: [PATCH v7 03/13] nvme: zns: Allow ZNS drives that have non-power_of_2 zone size Date: Wed, 15 Jun 2022 12:19:10 +0200 [thread overview] Message-ID: <20220615101920.329421-4-p.raghav@samsung.com> (raw) In-Reply-To: <20220615101920.329421-1-p.raghav@samsung.com> 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 <mcgrof@kernel.org> Reviewed by: Adam Manzanares <a.manzanares@samsung.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> --- drivers/nvme/host/zns.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 9f81beb4d..d92f937d5 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 +196,11 @@ 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
WARNING: multiple messages have this Message-ID (diff)
From: Pankaj Raghav <p.raghav@samsung.com> To: hch@lst.de, snitzer@redhat.com, damien.lemoal@opensource.wdc.com, axboe@kernel.dk Cc: Pankaj Raghav <p.raghav@samsung.com>, bvanassche@acm.org, pankydev8@gmail.com, gost.dev@samsung.com, jiangbo.365@bytedance.com, linux-nvme@lists.infradead.org, linux-kernel@vger.kernel.org, linux-block@vger.kernel.org, dm-devel@redhat.com, jonathan.derrick@linux.dev, Johannes.Thumshirn@wdc.com, dsterba@suse.com, jaegeuk@kernel.org, Luis Chamberlain <mcgrof@kernel.org> Subject: [dm-devel] [PATCH v7 03/13] nvme: zns: Allow ZNS drives that have non-power_of_2 zone size Date: Wed, 15 Jun 2022 12:19:10 +0200 [thread overview] Message-ID: <20220615101920.329421-4-p.raghav@samsung.com> (raw) In-Reply-To: <20220615101920.329421-1-p.raghav@samsung.com> 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 <mcgrof@kernel.org> Reviewed by: Adam Manzanares <a.manzanares@samsung.com> Reviewed-by: Hannes Reinecke <hare@suse.de> Signed-off-by: Pankaj Raghav <p.raghav@samsung.com> --- drivers/nvme/host/zns.c | 21 ++++++++++++--------- 1 file changed, 12 insertions(+), 9 deletions(-) diff --git a/drivers/nvme/host/zns.c b/drivers/nvme/host/zns.c index 9f81beb4d..d92f937d5 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 +196,11 @@ 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
next prev parent reply other threads:[~2022-06-15 10:19 UTC|newest] Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top [not found] <CGME20220615101924eucas1p27fbce623c0e1b3097169bf23dd6266d8@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 00/13] support non power of 2 zoned device Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220615101927eucas1p17220c7a36f69f59ff8ddd560b42967ec@eucas1p1.samsung.com> 2022-06-15 10:19 ` [PATCH v7 01/13] block: make blkdev_nr_zones and blk_queue_zone_no generic for npo2 zsze Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav 2022-06-15 20:18 ` Bart Van Assche 2022-06-15 20:18 ` Bart Van Assche [not found] ` <CGME20220615101931eucas1p15ed09ae433a2c378b599e9086130d8eb@eucas1p1.samsung.com> 2022-06-15 10:19 ` [PATCH v7 02/13] block: allow blk-zoned devices to have non-power-of-2 zone size Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav 2022-06-15 20:28 ` Bart Van Assche 2022-06-15 20:28 ` Bart Van Assche 2022-06-16 10:09 ` Pankaj Raghav 2022-06-16 10:09 ` Pankaj Raghav 2022-06-16 16:04 ` Luis Chamberlain 2022-06-16 16:04 ` Luis Chamberlain 2022-06-16 23:30 ` Damien Le Moal 2022-06-16 23:30 ` Damien Le Moal [not found] ` <CGME20220615101935eucas1p26a7bc245d88a89312158d7a265f64aef@eucas1p2.samsung.com> 2022-06-15 10:19 ` Pankaj Raghav [this message] 2022-06-15 10:19 ` [dm-devel] [PATCH v7 03/13] nvme: zns: Allow ZNS drives that have non-power_of_2 " Pankaj Raghav [not found] ` <CGME20220615101938eucas1p26ab159a1ffd0fa5a16d7f202ba7206e7@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 04/13] nvmet: Allow ZNS target to support non-power_of_2 zone sizes Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220615101941eucas1p25e1c27b363e6b288b848521298e31705@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 05/13] null_blk: allow non power of 2 zoned devices Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220615101945eucas1p16fa264e81d9b6027ff131dd311ed91e2@eucas1p1.samsung.com> 2022-06-15 10:19 ` [PATCH v7 06/13] null_blk: use zone_size_sects_shift for " Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav 2022-06-15 11:56 ` Damien Le Moal 2022-06-15 11:56 ` [dm-devel] " Damien Le Moal [not found] ` <CGME20220615101948eucas1p2d8d801735c39b25256a019134adb0c6f@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 07/13] zonefs: allow non " Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220615101951eucas1p238eb45e563bd9645af81bf16c56d98ec@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 08/13] dm-zoned: ensure only power of 2 zone sizes are allowed Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav [not found] ` <CGME20220615101955eucas1p19b9d42ead7331f69f7dad1ec100312c2@eucas1p1.samsung.com> 2022-06-15 10:19 ` [dm-devel] [PATCH v7 09/13] dm-zone: use generic helpers to calculate offset from zone start Pankaj Raghav 2022-06-15 10:19 ` Pankaj Raghav [not found] ` <CGME20220615102000eucas1p27720aaa3c309327b2b9a33c5f840f498@eucas1p2.samsung.com> 2022-06-15 10:19 ` [dm-devel] [PATCH v7 10/13] dm-table: use bdev_is_zone_start helper in device_area_is_invalid() Pankaj Raghav 2022-06-15 10:19 ` Pankaj Raghav 2022-06-15 11:53 ` Damien Le Moal 2022-06-15 11:53 ` [dm-devel] " Damien Le Moal 2022-06-16 9:55 ` Pankaj Raghav 2022-06-16 9:55 ` [dm-devel] " Pankaj Raghav 2022-06-16 23:29 ` Damien Le Moal 2022-06-16 23:29 ` [dm-devel] " Damien Le Moal [not found] ` <CGME20220615102004eucas1p1e458ea097d381058b16fc6daa3eec998@eucas1p1.samsung.com> 2022-06-15 10:19 ` [dm-devel] [PATCH v7 11/13] dm-table: allow non po2 zoned devices Pankaj Raghav 2022-06-15 10:19 ` Pankaj Raghav [not found] ` <CGME20220615102007eucas1p1106f9520e2a86beb3792107dffd8071b@eucas1p1.samsung.com> 2022-06-15 10:19 ` [dm-devel] [PATCH v7 12/13] dm: call dm_zone_endio after the target endio callback for " Pankaj Raghav 2022-06-15 10:19 ` Pankaj Raghav 2022-06-15 11:01 ` [dm-devel] " Damien Le Moal 2022-06-15 11:01 ` Damien Le Moal 2022-06-16 12:24 ` Pankaj Raghav 2022-06-16 12:24 ` Pankaj Raghav 2022-06-16 23:33 ` Damien Le Moal 2022-06-16 23:33 ` Damien Le Moal [not found] ` <CGME20220615102011eucas1p220368db4a186181b1927dea50a79e5d4@eucas1p2.samsung.com> 2022-06-15 10:19 ` [PATCH v7 13/13] dm: add non power of 2 zoned target Pankaj Raghav 2022-06-15 10:19 ` [dm-devel] " Pankaj Raghav 2022-06-15 11:49 ` Damien Le Moal 2022-06-15 11:49 ` [dm-devel] " Damien Le Moal 2022-06-16 16:12 ` Pankaj Raghav 2022-06-16 16:12 ` [dm-devel] " Pankaj Raghav 2022-06-16 23:49 ` Damien Le Moal 2022-06-16 23:49 ` [dm-devel] " Damien Le Moal 2022-06-17 5:45 ` Pankaj Raghav 2022-06-17 5:45 ` [dm-devel] " Pankaj Raghav 2022-06-17 6:12 ` Damien Le Moal 2022-06-17 6:12 ` [dm-devel] " Damien Le Moal 2022-06-17 6:40 ` Pankaj Raghav 2022-06-17 6:40 ` [dm-devel] " Pankaj Raghav 2022-06-17 6:56 ` Damien Le Moal 2022-06-17 6:56 ` [dm-devel] " Damien Le Moal 2022-06-17 8:03 ` Pankaj Raghav 2022-06-17 8:03 ` [dm-devel] " Pankaj Raghav 2022-06-15 14:19 ` kernel test robot 2022-06-15 14:19 ` [dm-devel] " kernel test robot 2022-06-15 19:54 ` Randy Dunlap 2022-06-15 19:54 ` [dm-devel] " Randy Dunlap 2022-06-16 10:28 ` Pankaj Raghav 2022-06-16 10:28 ` [dm-devel] " Pankaj Raghav
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