From patchwork Tue Jun 27 18:36:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nitesh Shetty X-Patchwork-Id: 698614 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 E8E98EB64D7 for ; Wed, 28 Jun 2023 09:03:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233097AbjF1JDj (ORCPT ); Wed, 28 Jun 2023 05:03:39 -0400 Received: from mailout1.samsung.com ([203.254.224.24]:16469 "EHLO mailout1.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234357AbjF1IWl (ORCPT ); Wed, 28 Jun 2023 04:22:41 -0400 Received: from epcas5p2.samsung.com (unknown [182.195.41.40]) by mailout1.samsung.com (KnoxPortal) with ESMTP id 20230628055507epoutp01a0e639ede784bb7d20a6f11691b26985~svPHuVc2L2369523695epoutp01T for ; Wed, 28 Jun 2023 05:55:07 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 mailout1.samsung.com 20230628055507epoutp01a0e639ede784bb7d20a6f11691b26985~svPHuVc2L2369523695epoutp01T DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=samsung.com; s=mail20170921; t=1687931707; bh=4VwEhnu6y9FZX57IV2SmXg/60qHIU2+pV0jbLYUq1BA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=awzPbsyJd1kUR3sLsQtJHBUVQwzuvOY0fHcn31uXZ1LaHDMfjyXPdxvZK0DgO7QK6 e4pwQyBXuhHWI9MCocsdljiZkaMQvvw6HDSv1QNa8lD+wQ2QuIRFSnXWOxIz1GhEoW WRs/z6GW/YPh4T5tjrA3v5IzM32eJq64iveGt2co= Received: from epsnrtp2.localdomain (unknown [182.195.42.163]) by epcas5p2.samsung.com (KnoxPortal) with ESMTP id 20230628055506epcas5p2de3b04607876dd4670d779fbfa51dfad~svPG7mdvH0721107211epcas5p2Q; Wed, 28 Jun 2023 05:55:06 +0000 (GMT) Received: from epsmges5p2new.samsung.com (unknown [182.195.38.174]) by epsnrtp2.localdomain (Postfix) with ESMTP id 4QrW55029Kz4x9QG; Wed, 28 Jun 2023 05:55:04 +0000 (GMT) Received: from epcas5p3.samsung.com ( [182.195.41.41]) by epsmges5p2new.samsung.com (Symantec Messaging Gateway) with SMTP id 64.C6.44250.83BCB946; Wed, 28 Jun 2023 14:55:04 +0900 (KST) Received: from epsmtrp1.samsung.com (unknown [182.195.40.13]) by epcas5p1.samsung.com (KnoxPortal) with ESMTPA id 20230627184000epcas5p1c7cb01eb1c70bc5a19f76ce21f2ec3f8~smBq_EZIQ3272832728epcas5p1E; Tue, 27 Jun 2023 18:40:00 +0000 (GMT) Received: from epsmgms1p1new.samsung.com (unknown [182.195.42.41]) by epsmtrp1.samsung.com (KnoxPortal) with ESMTP id 20230627184000epsmtrp1d75d61c9665105b36497d9ea07ee5335~smBq79H0W1784017840epsmtrp1x; Tue, 27 Jun 2023 18:40:00 +0000 (GMT) X-AuditID: b6c32a4a-4c3bea800000acda-d9-649bcb38795d Received: from epsmtip2.samsung.com ( [182.195.34.31]) by epsmgms1p1new.samsung.com (Symantec Messaging Gateway) with SMTP id 6C.39.34491.00D2B946; Wed, 28 Jun 2023 03:40:00 +0900 (KST) Received: from green245.sa.corp.samsungelectronics.net (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230627183956epsmtip295840d2007e2a19e54f23a74d8bd5c6f~smBnCt6L70383803838epsmtip2Z; Tue, 27 Jun 2023 18:39:56 +0000 (GMT) From: Nitesh Shetty To: Jens Axboe , Jonathan Corbet , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Keith Busch , Christoph Hellwig , Sagi Grimberg , Chaitanya Kulkarni , Alexander Viro , Christian Brauner Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, willy@infradead.org, hare@suse.de, djwong@kernel.org, bvanassche@acm.org, ming.lei@redhat.com, dlemoal@kernel.org, nitheshshetty@gmail.com, gost.dev@samsung.com, Nitesh Shetty , Kanchan Joshi , Anuj Gupta , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org Subject: [PATCH v13 1/9] block: Introduce queue limits for copy-offload support Date: Wed, 28 Jun 2023 00:06:15 +0530 Message-Id: <20230627183629.26571-2-nj.shetty@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20230627183629.26571-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01Ta1BUZRie75zdswvT0hGwPmFQZqkhIC6LLH6QSCXiSZiiaZwpphHW3SMQ y+6ylwCdxuWyFhSsCBYsIChGCgwoCC2sEAMRN3WNiwQzFOAyjaDcpKA2MeBg+e95n3me732f 95uXi9vXcpy4CTI1rZSJpHzCltXc5eHhjQZKJH6/NAlRff9POMo4+wRHNRN6As11LQP09eJf OLJ0fA7QkMUOTf4QitrmS9horKMFQzcvncPQ1ZpuDHU/fUSgc533AJoZMWCobdwLXTxzmYVu tvWx0FBrKYHKq2Y46MtRI4G+61nHUGdBJoaMlnSAmq3lOKqbW2Ch3nFnZH7Sw0bWtVLiTRdq aDiCajFMcCjzr9dZVOMVT2rotoZqqM4mqMbLpynTmJagKvMK2FRu5jxBLc2Ms6iF9hGCyrtR DajGgVPU44bdVIPlERZFRifuj6dFElrpSsvEckmCLC6EH/FBzMEYYaCfwFsQhPbxXWWiJDqE HxYZ5R2eIN1YEd/1U5FUs0FFiVQqvu+B/Uq5Rk27xstV6hA+rZBIFQEKH5UoSaWRxfnIaHWw wM/PX7ghjE2Mtw5OsRXtUalFd7rYWjB6MAfYcCEZAH/O/ofIAbZce9IE4P31mu1iGcCh5Smc Kf4EcMz4BysHcLcsDX3uDN8G4IWOjm2RDoPFc5NbIoL0ggNPuZu8I6nF4TVTJdjsh5PzODRe iNzEDuT7sKZ0lbOJWeSr0PK4aUvDI4NhvrmUwzTzhfrfdmzSNuQb0GT+kc1IdsC+YguLeXIP zGwq2ZoBkndsoEmXx2ayhcHKAh1gsAOc7bnBYbATfKA/s41T4NXCKwRjzgLQMGrYNoRCXb8e 3xwCJz1gfasvQ7vA8/11GNPYDuZaLRjD8zZiPcNusLa+gmDwLnhvNX0bU3BluBhjlpUHYO/D KtZZ4Gp4LpDhuUCG/1tXALwa7KIVqqQ4WiVU+MvolP9+WSxPagBbZ+N5xAimJhd9OgHGBZ0A cnG+I++ltW8k9jyJKO0krZTHKDVSWtUJhBsLz8eddorlG3cnU8cIAoL8AgIDAwOC9gYK+C/z qoZzJfZknEhNJ9K0glY+82FcGyctlpC/U7mHlZZcJFzOWw9bCbWGD9dJEqcFrZ2veerCss5f XJMOv65JDpnLllWNvfjCx4uFp/0GhQuG+aLr7R1ltzK8ctimv8XiwwkTbq+EJN233PW++33w ianj3VTb7LGZZOe4AyfjjYNev+82fmTvk6EouFT+mXXlYb5HavFslu1R99XAyhGz7t3Ytw9F ux/NKdV7uuj0HvQJ7YexNZLJaUGkWM2z6as4Xu+Y9sBYhtv1AN/aY/u+qjNnf1IYruKnX3O+ Vfat22hKEY/f/o5+ySG1yzv6i3nhNN0bdapgHaXdjtA2Nae/dyTAZa/djF2mqd/x0MMWzD9Z suQu6nnLVipy47NU8SKBJ65Uif4FMvPA/78EAAA= X-Brightmail-Tracker: H4sIAAAAAAAAA02Sa0hTYRjHe885OzuTFsdl7dUoYRGV1lQ0eMnKbsQhuxh0ww/Wcse50jk3 LS9drEGlaZqF5ZRsZVZqWXNe5r2ZLau1aKkkWIaTCnNagyjmpU4S9O33/C/wfPhTuGiQ8KOU qhRWo5IlSEgvor5T4r9y1soSefD1qlBU8/wpjs4UTOKoaiCfRCOd3wEqGv+FI2fHOYAczjlo sD0CtbpKeOhdhxlDLTcLMXSvqgtDXdOjJCq09AI03KPHUGt/IDKcLSdQS2s3gRxNpSQqqxjm owt9jSS6Y53CkOWyDkONztMA1XvKcPRgZIxAz/oXIPuklYc8P0vJ9QsZx9tIxqwf4DP2948I pvZuAOOwpTLGymySqS0/xTS/yyKZWxcv85g8nYtkvg33E8xYWw/JXDRVAqb2RSbjNi5ijM5R LIqO9lojZxOUR1lN0LqDXvGeNx956raotGuvOnlZoG9TDqAoSIdBY/fSHCCgRHQzgE0TGRxD 2hdWTD7BZ3guvDf1iZ8DvP5kdBg0uX+QXJekA+GLaYrTfegcHGabXQR34PQZAr6sGMK49lx6 J+yzDpEcE/QS6HTXAY6F9Gp4yV7Kn3kiCOZ/8OZkAR0Om+1PeJws+hMZs0bNpL1hd7GT4Bin /aGurgQvALT+P0v/n3UDYJXAl1VrExWJ2hB1iIo9JtXKErWpKoU0NinRCP6OIGB5I2ioHJda AEYBC4AULvERzv95VS4SymXpGawm6YAmNYHVWsACipCIheLPeXIRrZClsEdYVs1q/rkYJfDL wsK32GDcV/FJU3b1o0PJoU0KVV/uqi95MYdjjq4d2WaIAxZLFvjh2BOUJG5QSxcXRGeG+US4 yop6v2zQp7UhxdXA05m97RnFyZHh501iRbo1GuXuu1HW7Gdwbbk1EDE7YOdEQo1ferJLZi2y uD3+LRvkwYsd4SHSpg/VhWvGv9pTXnW5rcdsyVsNdqFgY1tLzxJB/zLdru37Ww27O8pLh+Gs pBPnp0+h1yu2aeqW7j28ebW5I+84ad48ZJ14vbAm7eHjURMv1zv4rHJ2WC8/9FtsTMP7I0p3 fSa2d9A3dd6hh0Tkdaq7xLZDfLvY2zZ1f77ywtrqKx5PPp5BS37pJYQ2XhYSgGu0st8tOjBj cwMAAA== X-CMS-MailID: 20230627184000epcas5p1c7cb01eb1c70bc5a19f76ce21f2ec3f8 X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230627184000epcas5p1c7cb01eb1c70bc5a19f76ce21f2ec3f8 References: <20230627183629.26571-1-nj.shetty@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org Add device limits as sysfs entries, - copy_offload (RW) - copy_max_bytes (RW) - copy_max_bytes_hw (RO) Above limits help to split the copy payload in block layer. copy_offload: used for setting copy offload(1) or emulation(0). copy_max_bytes: maximum total length of copy in single payload. copy_max_bytes_hw: Reflects the device supported maximum limit. Reviewed-by: Hannes Reinecke Signed-off-by: Nitesh Shetty Signed-off-by: Kanchan Joshi Signed-off-by: Anuj Gupta --- Documentation/ABI/stable/sysfs-block | 33 +++++++++++++++ block/blk-settings.c | 24 +++++++++++ block/blk-sysfs.c | 63 ++++++++++++++++++++++++++++ include/linux/blkdev.h | 12 ++++++ include/uapi/linux/fs.h | 3 ++ 5 files changed, 135 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index c57e5b7cb532..3c97303f658b 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -155,6 +155,39 @@ Description: last zone of the device which may be smaller. +What: /sys/block//queue/copy_offload +Date: June 2023 +Contact: linux-block@vger.kernel.org +Description: + [RW] When read, this file shows whether offloading copy to a + device is enabled (1) or disabled (0). Writing '0' to this + file will disable offloading copies for this device. + Writing any '1' value will enable this feature. If the device + does not support offloading, then writing 1, will result in an + error. + + +What: /sys/block//queue/copy_max_bytes +Date: June 2023 +Contact: linux-block@vger.kernel.org +Description: + [RW] This is the maximum number of bytes that the block layer + will allow for a copy request. This will is always smaller or + equal to the maximum size allowed by the hardware, indicated by + 'copy_max_bytes_hw'. An attempt to set a value higher than + 'copy_max_bytes_hw' will truncate this to 'copy_max_bytes_hw'. + + +What: /sys/block//queue/copy_max_bytes_hw +Date: June 2023 +Contact: linux-block@vger.kernel.org +Description: + [RO] This is the maximum number of bytes that the hardware + will allow for single data copy request. + A value of 0 means that the device does not support + copy offload. + + What: /sys/block//queue/crypto/ Date: February 2022 Contact: linux-block@vger.kernel.org diff --git a/block/blk-settings.c b/block/blk-settings.c index 4dd59059b788..738cd3f21259 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -59,6 +59,8 @@ void blk_set_default_limits(struct queue_limits *lim) lim->zoned = BLK_ZONED_NONE; lim->zone_write_granularity = 0; lim->dma_alignment = 511; + lim->max_copy_sectors_hw = 0; + lim->max_copy_sectors = 0; } /** @@ -82,6 +84,8 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->max_dev_sectors = UINT_MAX; lim->max_write_zeroes_sectors = UINT_MAX; lim->max_zone_append_sectors = UINT_MAX; + lim->max_copy_sectors_hw = UINT_MAX; + lim->max_copy_sectors = UINT_MAX; } EXPORT_SYMBOL(blk_set_stacking_limits); @@ -183,6 +187,22 @@ void blk_queue_max_discard_sectors(struct request_queue *q, } EXPORT_SYMBOL(blk_queue_max_discard_sectors); +/** + * blk_queue_max_copy_sectors_hw - set max sectors for a single copy payload + * @q: the request queue for the device + * @max_copy_sectors: maximum number of sectors to copy + **/ +void blk_queue_max_copy_sectors_hw(struct request_queue *q, + unsigned int max_copy_sectors) +{ + if (max_copy_sectors > (COPY_MAX_BYTES >> SECTOR_SHIFT)) + max_copy_sectors = COPY_MAX_BYTES >> SECTOR_SHIFT; + + q->limits.max_copy_sectors_hw = max_copy_sectors; + q->limits.max_copy_sectors = max_copy_sectors; +} +EXPORT_SYMBOL_GPL(blk_queue_max_copy_sectors_hw); + /** * blk_queue_max_secure_erase_sectors - set max sectors for a secure erase * @q: the request queue for the device @@ -578,6 +598,10 @@ int blk_stack_limits(struct queue_limits *t, struct queue_limits *b, t->max_segment_size = min_not_zero(t->max_segment_size, b->max_segment_size); + t->max_copy_sectors = min(t->max_copy_sectors, b->max_copy_sectors); + t->max_copy_sectors_hw = min(t->max_copy_sectors_hw, + b->max_copy_sectors_hw); + t->misaligned |= b->misaligned; alignment = queue_limit_alignment_offset(b, start); diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index afc797fb0dfc..43551778d035 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -199,6 +199,62 @@ static ssize_t queue_discard_zeroes_data_show(struct request_queue *q, char *pag return queue_var_show(0, page); } +static ssize_t queue_copy_offload_show(struct request_queue *q, char *page) +{ + return queue_var_show(blk_queue_copy(q), page); +} + +static ssize_t queue_copy_offload_store(struct request_queue *q, + const char *page, size_t count) +{ + unsigned long copy_offload; + ssize_t ret = queue_var_store(©_offload, page, count); + + if (ret < 0) + return ret; + + if (copy_offload && !q->limits.max_copy_sectors_hw) + return -EINVAL; + + if (copy_offload) + blk_queue_flag_set(QUEUE_FLAG_COPY, q); + else + blk_queue_flag_clear(QUEUE_FLAG_COPY, q); + + return count; +} + +static ssize_t queue_copy_max_hw_show(struct request_queue *q, char *page) +{ + return sprintf(page, "%llu\n", (unsigned long long) + q->limits.max_copy_sectors_hw << SECTOR_SHIFT); +} + +static ssize_t queue_copy_max_show(struct request_queue *q, char *page) +{ + return sprintf(page, "%llu\n", (unsigned long long) + q->limits.max_copy_sectors << SECTOR_SHIFT); +} + +static ssize_t queue_copy_max_store(struct request_queue *q, + const char *page, size_t count) +{ + unsigned long max_copy; + ssize_t ret = queue_var_store(&max_copy, page, count); + + if (ret < 0) + return ret; + + if (max_copy & (queue_logical_block_size(q) - 1)) + return -EINVAL; + + max_copy >>= SECTOR_SHIFT; + q->limits.max_copy_sectors = min_t(unsigned int, max_copy, + q->limits.max_copy_sectors_hw); + + return count; +} + static ssize_t queue_write_same_max_show(struct request_queue *q, char *page) { return queue_var_show(0, page); @@ -522,6 +578,10 @@ QUEUE_RO_ENTRY(queue_nr_zones, "nr_zones"); QUEUE_RO_ENTRY(queue_max_open_zones, "max_open_zones"); QUEUE_RO_ENTRY(queue_max_active_zones, "max_active_zones"); +QUEUE_RW_ENTRY(queue_copy_offload, "copy_offload"); +QUEUE_RO_ENTRY(queue_copy_max_hw, "copy_max_bytes_hw"); +QUEUE_RW_ENTRY(queue_copy_max, "copy_max_bytes"); + QUEUE_RW_ENTRY(queue_nomerges, "nomerges"); QUEUE_RW_ENTRY(queue_rq_affinity, "rq_affinity"); QUEUE_RW_ENTRY(queue_poll, "io_poll"); @@ -638,6 +698,9 @@ static struct attribute *queue_attrs[] = { &queue_discard_max_entry.attr, &queue_discard_max_hw_entry.attr, &queue_discard_zeroes_data_entry.attr, + &queue_copy_offload_entry.attr, + &queue_copy_max_hw_entry.attr, + &queue_copy_max_entry.attr, &queue_write_same_max_entry.attr, &queue_write_zeroes_max_entry.attr, &queue_zone_append_max_entry.attr, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index ed44a997f629..6098665953e6 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -309,6 +309,9 @@ struct queue_limits { unsigned int discard_alignment; unsigned int zone_write_granularity; + unsigned int max_copy_sectors_hw; + unsigned int max_copy_sectors; + unsigned short max_segments; unsigned short max_integrity_segments; unsigned short max_discard_segments; @@ -554,6 +557,7 @@ struct request_queue { #define QUEUE_FLAG_NOWAIT 29 /* device supports NOWAIT */ #define QUEUE_FLAG_SQ_SCHED 30 /* single queue style io dispatch */ #define QUEUE_FLAG_SKIP_TAGSET_QUIESCE 31 /* quiesce_tagset skip the queue*/ +#define QUEUE_FLAG_COPY 32 /* enable/disable device copy offload */ #define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \ (1UL << QUEUE_FLAG_SAME_COMP) | \ @@ -574,6 +578,7 @@ bool blk_queue_flag_test_and_set(unsigned int flag, struct request_queue *q); test_bit(QUEUE_FLAG_STABLE_WRITES, &(q)->queue_flags) #define blk_queue_io_stat(q) test_bit(QUEUE_FLAG_IO_STAT, &(q)->queue_flags) #define blk_queue_add_random(q) test_bit(QUEUE_FLAG_ADD_RANDOM, &(q)->queue_flags) +#define blk_queue_copy(q) test_bit(QUEUE_FLAG_COPY, &(q)->queue_flags) #define blk_queue_zone_resetall(q) \ test_bit(QUEUE_FLAG_ZONE_RESETALL, &(q)->queue_flags) #define blk_queue_dax(q) test_bit(QUEUE_FLAG_DAX, &(q)->queue_flags) @@ -891,6 +896,8 @@ extern void blk_queue_chunk_sectors(struct request_queue *, unsigned int); extern void blk_queue_max_segments(struct request_queue *, unsigned short); extern void blk_queue_max_discard_segments(struct request_queue *, unsigned short); +extern void blk_queue_max_copy_sectors_hw(struct request_queue *q, + unsigned int max_copy_sectors); void blk_queue_max_secure_erase_sectors(struct request_queue *q, unsigned int max_sectors); extern void blk_queue_max_segment_size(struct request_queue *, unsigned int); @@ -1210,6 +1217,11 @@ static inline unsigned int bdev_discard_granularity(struct block_device *bdev) return bdev_get_queue(bdev)->limits.discard_granularity; } +static inline unsigned int bdev_max_copy_sectors(struct block_device *bdev) +{ + return bdev_get_queue(bdev)->limits.max_copy_sectors; +} + static inline unsigned int bdev_max_secure_erase_sectors(struct block_device *bdev) { diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index b7b56871029c..dff56813f95a 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -64,6 +64,9 @@ struct fstrim_range { __u64 minlen; }; +/* maximum copy offload length, this is set to 128MB based on current testing */ +#define COPY_MAX_BYTES (1 << 27) + /* extent-same (dedupe) ioctls; these MUST match the btrfs ioctl definitions */ #define FILE_DEDUPE_RANGE_SAME 0 #define FILE_DEDUPE_RANGE_DIFFERS 1