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Fri, 29 Sep 2023 10:28:36 +0000 Received: from DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::ebfd:c49c:6b8:6fce]) by DM6PR10MB4313.namprd10.prod.outlook.com ([fe80::ebfd:c49c:6b8:6fce%7]) with mapi id 15.20.6813.027; Fri, 29 Sep 2023 10:28:35 +0000 From: John Garry To: axboe@kernel.dk, kbusch@kernel.org, hch@lst.de, sagi@grimberg.me, jejb@linux.ibm.com, martin.petersen@oracle.com, djwong@kernel.org, viro@zeniv.linux.org.uk, brauner@kernel.org, chandan.babu@oracle.com, dchinner@redhat.com Cc: linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-xfs@vger.kernel.org, linux-fsdevel@vger.kernel.org, tytso@mit.edu, jbongio@google.com, linux-api@vger.kernel.org, John Garry Subject: [PATCH 18/21] scsi: sd: Support reading atomic properties from block limits VPD Date: Fri, 29 Sep 2023 10:27:23 +0000 Message-Id: <20230929102726.2985188-19-john.g.garry@oracle.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230929102726.2985188-1-john.g.garry@oracle.com> References: <20230929102726.2985188-1-john.g.garry@oracle.com> X-ClientProxiedBy: BLAPR03CA0151.namprd03.prod.outlook.com (2603:10b6:208:32f::15) To DM6PR10MB4313.namprd10.prod.outlook.com (2603:10b6:5:212::20) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: DM6PR10MB4313:EE_|PH7PR10MB6153:EE_ X-MS-Office365-Filtering-Correlation-Id: 69b42816-48d6-45cf-44fd-08dbc0d6d634 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; 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See sbc4r22 section 6.6.4 - Block limits VPD page. Signed-off-by: John Garry --- drivers/scsi/sd.c | 37 ++++++++++++++++++++++++++++++++++++- drivers/scsi/sd.h | 7 +++++++ 2 files changed, 43 insertions(+), 1 deletion(-) diff --git a/drivers/scsi/sd.c b/drivers/scsi/sd.c index c92a317ba547..7f6cadd1f8f3 100644 --- a/drivers/scsi/sd.c +++ b/drivers/scsi/sd.c @@ -837,6 +837,33 @@ static blk_status_t sd_setup_unmap_cmnd(struct scsi_cmnd *cmd) return scsi_alloc_sgtables(cmd); } +static void sd_config_atomic(struct scsi_disk *sdkp) +{ + unsigned int logical_block_size = sdkp->device->sector_size; + struct request_queue *q = sdkp->disk->queue; + + if (sdkp->max_atomic) { + unsigned int physical_block_size_sectors = + sdkp->physical_block_size / sdkp->device->sector_size; + unsigned int max_atomic = max_t(unsigned int, + rounddown_pow_of_two(sdkp->max_atomic), + rounddown_pow_of_two(sdkp->max_atomic_with_boundary)); + unsigned int unit_min = sdkp->atomic_granularity ? + rounddown_pow_of_two(sdkp->atomic_granularity) : + physical_block_size_sectors; + unsigned int unit_max = max_atomic; + + if (sdkp->max_atomic_boundary) + unit_max = min_t(unsigned int, unit_max, + rounddown_pow_of_two(sdkp->max_atomic_boundary)); + + blk_queue_atomic_write_max_bytes(q, max_atomic * logical_block_size); + blk_queue_atomic_write_unit_min_sectors(q, unit_min); + blk_queue_atomic_write_unit_max_sectors(q, unit_max); + blk_queue_atomic_write_boundary_bytes(q, 0); + } +} + static blk_status_t sd_setup_write_same16_cmnd(struct scsi_cmnd *cmd, bool unmap) { @@ -2982,7 +3009,7 @@ static void sd_read_block_limits(struct scsi_disk *sdkp) sdkp->max_ws_blocks = (u32)get_unaligned_be64(&vpd->data[36]); if (!sdkp->lbpme) - goto out; + goto read_atomics; lba_count = get_unaligned_be32(&vpd->data[20]); desc_count = get_unaligned_be32(&vpd->data[24]); @@ -3013,6 +3040,14 @@ static void sd_read_block_limits(struct scsi_disk *sdkp) else sd_config_discard(sdkp, SD_LBP_DISABLE); } +read_atomics: + sdkp->max_atomic = get_unaligned_be32(&vpd->data[44]); + sdkp->atomic_alignment = get_unaligned_be32(&vpd->data[48]); + sdkp->atomic_granularity = get_unaligned_be32(&vpd->data[52]); + sdkp->max_atomic_with_boundary = get_unaligned_be32(&vpd->data[56]); + sdkp->max_atomic_boundary = get_unaligned_be32(&vpd->data[60]); + + sd_config_atomic(sdkp); } out: diff --git a/drivers/scsi/sd.h b/drivers/scsi/sd.h index 5eea762f84d1..bca05fbd74df 100644 --- a/drivers/scsi/sd.h +++ b/drivers/scsi/sd.h @@ -121,6 +121,13 @@ struct scsi_disk { u32 max_unmap_blocks; u32 unmap_granularity; u32 unmap_alignment; + + u32 max_atomic; + u32 atomic_alignment; + u32 atomic_granularity; + u32 max_atomic_with_boundary; + u32 max_atomic_boundary; + u32 index; unsigned int physical_block_size; unsigned int max_medium_access_timeouts;