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Messaging Gateway) with SMTP id 08.13.27706.6C74B646; Mon, 22 May 2023 19:45:26 +0900 (KST) Received: from green245.sa.corp.samsungelectronics.net (unknown [107.99.41.245]) by epsmtip2.samsung.com (KnoxPortal) with ESMTPA id 20230522104522epsmtip23379b85128ad1a00eb9a2dd413e225e6~hcU_tZeg_1590015900epsmtip2l; Mon, 22 May 2023 10:45:22 +0000 (GMT) From: Nitesh Shetty To: Jens Axboe , Alasdair Kergon , Mike Snitzer , dm-devel@redhat.com, Keith Busch , Christoph Hellwig , Sagi Grimberg , James Smart , Chaitanya Kulkarni , Alexander Viro , Christian Brauner , "Matthew Wilcox (Oracle)" , Andrew Morton Cc: martin.petersen@oracle.com, linux-scsi@vger.kernel.org, James.Bottomley@HansenPartnership.com, bvanassche@acm.org, hare@suse.de, ming.lei@redhat.com, dlemoal@kernel.org, anuj20.g@samsung.com, joshi.k@samsung.com, nitheshshetty@gmail.com, gost.dev@samsung.com, Nitesh Shetty , linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvme@lists.infradead.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH v11 1/9] block: Introduce queue limits for copy-offload support Date: Mon, 22 May 2023 16:11:32 +0530 Message-Id: <20230522104146.2856-2-nj.shetty@samsung.com> X-Mailer: git-send-email 2.35.1.500.gb896f729e2 In-Reply-To: <20230522104146.2856-1-nj.shetty@samsung.com> MIME-Version: 1.0 X-Brightmail-Tracker: H4sIAAAAAAAAA01TaVBTVxid+17y8sDGeSyOF0RLQzdgIIStF0bEEXXeVFoRf3Rqp8YMvAIF kkwSyvIHFGgBgdDQMhB2Qco2UBAxAlEnFFkqwwCySAWsLKVsIp0RBYESHrb+O+fcbznfd+cj cfMGnjUZJlUxCqkkQkCYcprb7R2cyj4LD3YZWLJE9T33cVRQX0ugK1mbOKoZVxNooX0VoJyV Vzh6ctcX6ZfzuejRvdsYarumwVBVTQeGGtQkai19jqGO7SUCaQzDAM0MaTGkH3NEbfpuDhps KSDQRO02FxVXzPDQ1REdgX7p3MKQITsRQ7rpywA1bxTjqG7hGQd1jR1CfZudXLTxsoA4foQe fHiG1k72EvRt7TiP7pto4NA5mh6CvlHpQA/2RtGN1akE3biq4dFduRsc+kZ5PN36KIGgMxKX Cfr5zBiHfnZniKAzm6pBgMWF8KOhjCSYUdgy0iBZcJg0xEdw5rzYT+zh6SJyEnmhTwS2Ukkk 4yM46R/gdDosYmdTAtvvJBFRO1KARKkUCI8dVciiVIxtqEyp8hEw8uAIubvcWSmJVEZJQ5yl 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H4sIAAAAAAAAA02Sa1BMYRiAfeecPXtamjm7uXzFaKxbNm3C5NO4zbTDMQwRMyyGnTpaujpb CFEqUWxNzaS2m9us2pA2rZKSZauVe5e1UaHCWFTMuEwqVsz4987zPO/766Vw0RvChdoVFsly YYoQMSkgDHfErh51K4ID5xQnilHJvToc5ZZcItHRtEEcFbenksh25zNAmX0/cPTy1lJU/SmH h6y1lRi6eS4dQ0XFJgyVplKo6mw/hkzDH0mUbmwFqKdFg6HqNnd0s9pMoKYbuSTquDTMQwXa Hj5KsVSQ6GL9EIaMGfEYquiOA8gwUICjK7ZeAjW0TUSPBut5aOB7LrlsMtPUvIrRdD4gmUpN O5951FFKMJnp90imrFDCND2IYvS6EySj/5zOZxqyBgim7MIRpsoaSzKn4j+RTH9PG8H01rSQ jPqaDvg5yQWLAtmQXXtZznPJDoHSVmvhRwyt3d/8QhILtL7JwIGC9Hx4/eQVLBkIKBFdBWBJ tw4fEc5QO3j37+wEi4be8keieAw+/WYlkgFFkbQ7bBym7Hws3YfDkmvngH0Bp5/j0GDZZJ+d 6LXQUGDB7D1BT4c5Xfvt2JFeCM9erSHtGNKeMLVTaMcOtA9890SD27Hod5KmnTtSC6E5u5sY Oe4K48tz8DRAa/5Tmv/UGYDpgDMboQoNClV5RXiFsfukKkWoKiosSBoQHqoHf15BMqsCXNf1 SY0Ao4ARQAoXj3Vcpw4IFDkGKqIPsFz4di4qhFUZwUSKEE9wfJxs3i6igxSRbDDLRrDcP4tR Di6xWJTlw2pMXqpfv2CCm9VzgeRx7YnE6OU53ovceFlTE7/pFcEx78vjuLjChPHTH371y5Pd NnFuGTPEo4MOudm672u+F3Ycyl6tyux9siH/4eFns1LUZt+thP99njcqN71NqhQo766xULIN wstXuZ/Kk0+9XGX7ZG2eVkN2zEoPtbyyKWDSce+Y/GNTWGvN7Iv4Gb8dSxNkcb7Kca2j/I0H X45u9mmZNjfyfOvRPUJpO93QWAp2m8efnrlNKZWrZ7xeF17hvPmFv6lx6yt5f0pC2Rb3kFsu hlM/si580H45nVTk8Rzs/DlmY9eQbHGXQZjgX5frXb452ufGvPdddbb6PJekTjGhUiq8JDin UvwCzGQc1nkDAAA= X-CMS-MailID: 20230522104526epcas5p30d6cb07abadb068a95ab1f90dea42d4e X-Msg-Generator: CA X-Sendblock-Type: REQ_APPROVE CMS-TYPE: 105P DLP-Filter: Pass X-CFilter-Loop: Reflected X-CMS-RootMailID: 20230522104526epcas5p30d6cb07abadb068a95ab1f90dea42d4e References: <20230522104146.2856-1-nj.shetty@samsung.com> Precedence: bulk List-ID: X-Mailing-List: linux-fsdevel@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 | 64 ++++++++++++++++++++++++++++ include/linux/blkdev.h | 12 ++++++ include/uapi/linux/fs.h | 3 ++ 5 files changed, 136 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index c57e5b7cb532..e4d31132f77c 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: April 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 + error. + + +What: /sys/block//queue/copy_max_bytes +Date: April 2023 +Contact: linux-block@vger.kernel.org +Description: + [RW] This is the maximum number of bytes, that the block layer + will allow for copy request. This will be smaller or equal to + the maximum size allowed by the hardware, indicated by + 'copy_max_bytes_hw'. Attempt to set value higher than + 'copy_max_bytes_hw' will truncate this to 'copy_max_bytes_hw'. + + +What: /sys/block//queue/copy_max_bytes_hw +Date: April 2023 +Contact: linux-block@vger.kernel.org +Description: + [RO] This is the maximum number of bytes, that the hardware + will allow in a 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 896b4654ab00..23aff2d4dcba 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 = ULONG_MAX; + lim->max_copy_sectors = ULONG_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 a64208583853..826ab29beba3 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -212,6 +212,63 @@ 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) +{ + s64 copy_offload; + ssize_t ret = queue_var_store64(©_offload, page); + + 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) +{ + s64 max_copy; + ssize_t ret = queue_var_store64(&max_copy, page); + + if (ret < 0) + return ret; + + if (max_copy & (queue_logical_block_size(q) - 1)) + return -EINVAL; + + max_copy >>= SECTOR_SHIFT; + if (max_copy > q->limits.max_copy_sectors_hw) + max_copy = q->limits.max_copy_sectors_hw; + + q->limits.max_copy_sectors = max_copy; + return count; +} + static ssize_t queue_write_same_max_show(struct request_queue *q, char *page) { return queue_var_show(0, page); @@ -590,6 +647,10 @@ 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"); @@ -637,6 +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 b441e633f4dd..c9bf11adccb3 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -295,6 +295,9 @@ struct queue_limits { unsigned int discard_alignment; unsigned int zone_write_granularity; + unsigned long max_copy_sectors_hw; + unsigned long max_copy_sectors; + unsigned short max_segments; unsigned short max_integrity_segments; unsigned short max_discard_segments; @@ -561,6 +564,7 @@ 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 /* supports copy offload */ #define QUEUE_FLAG_MQ_DEFAULT ((1UL << QUEUE_FLAG_IO_STAT) | \ (1UL << QUEUE_FLAG_SAME_COMP) | \ @@ -581,6 +585,7 @@ 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) @@ -899,6 +904,8 @@ 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); @@ -1218,6 +1225,11 @@ 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..8879567791fa 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -64,6 +64,9 @@ struct fstrim_range { __u64 minlen; }; +/* maximum total copy length */ +#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