From patchwork Fri Oct 25 21:36:40 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Keith Busch X-Patchwork-Id: 13851857 Received: from mx0b-00082601.pphosted.com (mx0b-00082601.pphosted.com [67.231.153.30]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id A90EE217F56 for ; Fri, 25 Oct 2024 21:39:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=67.231.153.30 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729892383; cv=none; b=fZ0kiz3Sa5YHQf7rAoi9X0E+fJrVRJguU4R/RXnRSyQ0b7hnFzclWbujlY5SFq8PdKIrrUWSMD5qFNf9F+0ASRl8DKhczJ6XDjQ1edrcLIw3/eik71ItkfslTy2BSrvxe6OjC4m5AmG6XzJr49UrmaLGczg/KA26cu0Bc87gPs8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1729892383; c=relaxed/simple; bh=nauBGRU3shz+ZWCvP2BV+tS+Scp8LoxlhtFPBefRSxA=; h=From:To:CC:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=WEzo8Bo7dAV11ohHeoqZNlIdidLhnDbYusTl7VcEiocWaBa9YbTmnujcVGNA/ubki81mGtziCITopri6pZJsazyGMwlID0MII4RcxWgkbEOCM9iM8joUP67xSvj/CF2Rlvc8bp0X9OjaWIKgCyO9vrR4voZl+CpOE13sMyUWlGc= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com; spf=pass smtp.mailfrom=meta.com; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b=iRojtxtQ; arc=none smtp.client-ip=67.231.153.30 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=meta.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=meta.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=meta.com header.i=@meta.com header.b="iRojtxtQ" Received: from pps.filterd (m0109331.ppops.net [127.0.0.1]) by mx0a-00082601.pphosted.com (8.18.1.2/8.18.1.2) with ESMTP id 49PKXcYv001095 for ; Fri, 25 Oct 2024 14:39:40 -0700 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=meta.com; h=cc :content-transfer-encoding:content-type:date:from:in-reply-to :message-id:mime-version:references:subject:to; s=s2048-2021-q4; bh=e9c++zYU75GJQkDC+/04bSzW2n4NadoZumcFoHKXFa0=; b=iRojtxtQcdUl gEOes3yBTnT9SsZUgWOd2A5ruV6tEczbb5Bt3qlBBnuNxi4MQj6/5KV6e5TgzBEa 2WuvcaHxfqf0Lj7smVfn76i5tAOCeLENeNUyfHAe6eiOPlFHRF4wzgohbUF6g85b XylB9ccMT+hqx9fG5KcxtkeKNaEKFB/BINQsbr6KLgoOWHsX60lb1fqImFuMbs8o Hl84pJOAYSSN7AdaLpLZt/OMRtMkU7Ak0cu3jpwtRoXwnrVY+dUxq3YO21iVgDb5 jmh21/LFUqF2wKbjX/mDDGDK8FXM3oi0fawBK7OEbcueHlgPdE74p3NJS0ofvEgy XN3lPOB9HA== Received: from maileast.thefacebook.com ([163.114.135.16]) by mx0a-00082601.pphosted.com (PPS) with ESMTPS id 42ga1xv7xe-5 (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=NOT) for ; Fri, 25 Oct 2024 14:39:40 -0700 (PDT) Received: from twshared13460.05.ash9.facebook.com (2620:10d:c0a8:1b::30) by mail.thefacebook.com (2620:10d:c0a9:6f::8fd4) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.2.1544.11; Fri, 25 Oct 2024 21:39:37 +0000 Received: by devbig638.nha1.facebook.com (Postfix, from userid 544533) id 74CE31476D739; Fri, 25 Oct 2024 14:37:06 -0700 (PDT) From: Keith Busch To: , , , CC: , , , , , Keith Busch , Hannes Reinecke Subject: [PATCHv9 2/7] block: introduce max_write_hints queue limit Date: Fri, 25 Oct 2024 14:36:40 -0700 Message-ID: <20241025213645.3464331-3-kbusch@meta.com> X-Mailer: git-send-email 2.43.5 In-Reply-To: <20241025213645.3464331-1-kbusch@meta.com> References: <20241025213645.3464331-1-kbusch@meta.com> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-FB-Internal: Safe X-Proofpoint-ORIG-GUID: 52wm2EpDjmLygIX5Fl_qTj9nPtS6qlLU X-Proofpoint-GUID: 52wm2EpDjmLygIX5Fl_qTj9nPtS6qlLU X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1051,Hydra:6.0.680,FMLib:17.12.62.30 definitions=2024-10-05_03,2024-10-04_01,2024-09-30_01 From: Keith Busch 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 Signed-off-by: Keith Busch --- Documentation/ABI/stable/sysfs-block | 7 +++++++ block/blk-settings.c | 3 +++ block/blk-sysfs.c | 3 +++ include/linux/blkdev.h | 12 ++++++++++++ 4 files changed, 25 insertions(+) diff --git a/Documentation/ABI/stable/sysfs-block b/Documentation/ABI/stable/sysfs-block index 8353611107154..f2db2cabb8e75 100644 --- a/Documentation/ABI/stable/sysfs-block +++ b/Documentation/ABI/stable/sysfs-block @@ -506,6 +506,13 @@ Description: [RO] Maximum size in bytes of a single element in a DMA scatter/gather list. +What: /sys/block//queue/max_write_hints +Date: October 2024 +Contact: linux-block@vger.kernel.org +Description: + [RO] Maximum number of write hints supported, 0 if not + supported. If supported, valid values are 1 through + max_write_hints, inclusive. What: /sys/block//queue/max_segments Date: March 2010 diff --git a/block/blk-settings.c b/block/blk-settings.c index a446654ddee5e..921fb4d334fa4 100644 --- a/block/blk-settings.c +++ b/block/blk-settings.c @@ -43,6 +43,7 @@ void blk_set_stacking_limits(struct queue_limits *lim) lim->seg_boundary_mask = BLK_SEG_BOUNDARY_MASK; /* Inherit limits from component devices */ + lim->max_write_hints = USHRT_MAX; lim->max_segments = USHRT_MAX; lim->max_discard_segments = USHRT_MAX; lim->max_hw_sectors = UINT_MAX; @@ -544,6 +545,8 @@ 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_write_hints = min(t->max_write_hints, b->max_write_hints); + alignment = queue_limit_alignment_offset(b, start); /* Bottom device has different alignment. Check that it is diff --git a/block/blk-sysfs.c b/block/blk-sysfs.c index 741b95dfdbf6f..85f48ca461049 100644 --- a/block/blk-sysfs.c +++ b/block/blk-sysfs.c @@ -104,6 +104,7 @@ 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_hints) QUEUE_SYSFS_LIMIT_SHOW(logical_block_size) QUEUE_SYSFS_LIMIT_SHOW(physical_block_size) QUEUE_SYSFS_LIMIT_SHOW(chunk_sectors) @@ -457,6 +458,7 @@ QUEUE_RO_ENTRY(queue_max_hw_sectors, "max_hw_sectors_kb"); QUEUE_RO_ENTRY(queue_max_segments, "max_segments"); QUEUE_RO_ENTRY(queue_max_integrity_segments, "max_integrity_segments"); QUEUE_RO_ENTRY(queue_max_segment_size, "max_segment_size"); +QUEUE_RO_ENTRY(queue_max_write_hints, "max_write_hints"); QUEUE_RW_LOAD_MODULE_ENTRY(elv_iosched, "scheduler"); QUEUE_RO_ENTRY(queue_logical_block_size, "logical_block_size"); @@ -591,6 +593,7 @@ 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_hints_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 55bec14fe55f9..a8ad41ee07234 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -393,6 +393,8 @@ struct queue_limits { unsigned short max_integrity_segments; unsigned short max_discard_segments; + unsigned short max_write_hints; + unsigned int max_open_zones; unsigned int max_active_zones; @@ -1183,6 +1185,11 @@ static inline unsigned short queue_max_segments(const struct request_queue *q) return q->limits.max_segments; } +static inline unsigned short queue_max_write_hints(struct request_queue *q) +{ + return q->limits.max_write_hints; +} + static inline unsigned short queue_max_discard_segments(const struct request_queue *q) { return q->limits.max_discard_segments; @@ -1230,6 +1237,11 @@ 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_hints(struct block_device *bdev) +{ + return queue_max_write_hints(bdev_get_queue(bdev)); +} + static inline unsigned queue_logical_block_size(const struct request_queue *q) { return q->limits.logical_block_size;