diff options
| author | Keith Busch <kbusch@kernel.org> | 2025-05-06 17:47:24 +0530 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2025-05-06 07:46:43 -0600 |
| commit | d2f526ba27d29c442542f7c5df0a86ef0b576716 (patch) | |
| tree | 89335d624eda11b9c200da635ee2d805f1c91fd0 | |
| parent | 5006f85ea23ea0bda9a8e31fdda126f4fca48f20 (diff) | |
block: introduce max_write_streams queue limit
Drivers with hardware that support write streams need a way to export how
many are available so applications can generically query this.
Reviewed-by: Hannes Reinecke <hare@suse.de>
Reviewed-by: Nitesh Shetty <nj.shetty@samsung.com>
Signed-off-by: Keith Busch <kbusch@kernel.org>
[hch: renamed hints to streams, removed stacking]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Kanchan Joshi <joshi.k@samsung.com>
Link: https://lore.kernel.org/r/20250506121732.8211-4-joshi.k@samsung.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | Documentation/ABI/stable/sysfs-block | 7 | ||||
| -rw-r--r-- | block/blk-sysfs.c | 3 | ||||
| -rw-r--r-- | include/linux/blkdev.h | 9 |
3 files changed, 19 insertions, 0 deletions
diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index 11545c9e2e93..8bbe1eca28df 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -547,6 +547,13 @@ Description: [RO] Maximum size in bytes of a single element in a DMA scatter/gather list. +What: /sys/block/<disk>/queue/max_write_streams +Date: November 2024 +Contact: linux-block@vger.kernel.org +Description: + [RO] Maximum number of write streams supported, 0 if not + supported. If supported, valid values are 1 through + max_write_streams, inclusive. What: /sys/block/<disk>/queue/max_segments Date: March 2010 diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 01e0ead13278..5934150d4204 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -134,6 +134,7 @@ QUEUE_SYSFS_LIMIT_SHOW(max_segments) QUEUE_SYSFS_LIMIT_SHOW(max_discard_segments) QUEUE_SYSFS_LIMIT_SHOW(max_integrity_segments) QUEUE_SYSFS_LIMIT_SHOW(max_segment_size) +QUEUE_SYSFS_LIMIT_SHOW(max_write_streams) QUEUE_SYSFS_LIMIT_SHOW(logical_block_size) QUEUE_SYSFS_LIMIT_SHOW(physical_block_size) QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors) @@ -488,6 +489,7 @@ QUEUE_LIM_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); QUEUE_LIM_RO_ENTRY(queue_max_segments, "max_segments"); QUEUE_LIM_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); QUEUE_LIM_RO_ENTRY(queue_max_segment_size, "max_segment_size"); +QUEUE_LIM_RO_ENTRY(queue_max_write_streams, "max_write_streams"); QUEUE_RW_ENTRY(elv_iosched, "scheduler"); QUEUE_LIM_RO_ENTRY(queue_logical_block_size, "logical_block_size"); @@ -642,6 +644,7 @@ static struct attribute *queue_attrs[] = { &queue_max_discard_segments_entry.attr, &queue_max_integrity_segments_entry.attr, &queue_max_segment_size_entry.attr, + &queue_max_write_streams_entry.attr, &queue_hw_sector_size_entry.attr, &queue_logical_block_size_entry.attr, &queue_physical_block_size_entry.attr, diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 94323f303b37..13e1426ad38d 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -404,6 +404,8 @@ struct queue_limits { unsigned short max_integrity_segments; unsigned short max_discard_segments; + unsigned short max_write_streams; + unsigned int max_open_zones; unsigned int max_active_zones; @@ -1270,6 +1272,13 @@ static inline unsigned int bdev_max_segments(struct block_device *bdev) return queue_max_segments(bdev_get_queue(bdev)); } +static inline unsigned short bdev_max_write_streams(struct block_device *bdev) +{ + if (bdev_is_partition(bdev)) + return 0; + return bdev_limits(bdev)->max_write_streams; +} + static inline unsigned queue_logical_block_size(const struct request_queue *q) { return q->limits.logical_block_size; |