From patchwork Wed Jun 26 02:50:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Daniel Golle X-Patchwork-Id: 13712216 Received: from pidgin.makrotopia.org (pidgin.makrotopia.org [185.142.180.65]) (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 031176F06B; Wed, 26 Jun 2024 02:51:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.142.180.65 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719370276; cv=none; b=MnTectOKo8sTxDMdBa70Q3DTSIJu9AXKgduk+HVtP8OfKNXxdbH4fS6Bl+2TK12wT3tz99k5/VzHvqrE6314fHBATXjqu9vGFe+Q0TkjUXupchULjevJ44Q2MCnz3Y9JnwicKHnwAlAe4HnLp9BNtJdCMsZkYQYSmxPcjwKdrew= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1719370276; c=relaxed/simple; bh=mjuTceoUgUq4NKeZo7mgWeAGUCarJ1ymjop5K9OGsY8=; h=Date:From:To:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=pEtDNF3sB0vqtjYqj9wjXG2WOyaw8kEWWGxIiEw2AbO1O4JG9+ba7eBigZgkXOpPBfz7YNM+/IlzjR3/+LVOgfd0I0zxIp2pA7hyMgN1hPDz8l+adveA1Z9iRdoMMXnCBNCM0HFzRIqrBvf+yX+q13GIgQvo40FZI043zPls7pE= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=makrotopia.org; spf=pass smtp.mailfrom=makrotopia.org; arc=none smtp.client-ip=185.142.180.65 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=makrotopia.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=makrotopia.org Received: from local by pidgin.makrotopia.org with esmtpsa (TLS1.3:TLS_AES_256_GCM_SHA384:256) (Exim 4.97.1) (envelope-from ) id 1sMIkO-000000005sL-1k6y; Wed, 26 Jun 2024 02:51:00 +0000 Date: Wed, 26 Jun 2024 03:50:56 +0100 From: Daniel Golle To: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Ulf Hansson , Jens Axboe , Hauke Mehrtens , Felix Fietkau , Srinivas Kandagatla , Daniel Golle , Dave Chinner , Jan Kara , Christian Brauner , Thomas =?iso-8859-1?q?Wei=DFschuh?= , Al Viro , Li Lingfeng , Christian Heusel , Min Li , Avri Altman , Adrian Hunter , Hannes Reinecke , Mikko Rapeli , Yeqi Fu , Victor Shih , Christophe JAILLET , Li Zhijian , "Ricardo B. Marliere" , devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mmc@vger.kernel.org, linux-block@vger.kernel.org Subject: [PATCH v3 2/4] block: partitions: populate fwnode Message-ID: References: Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: Let block partitions to be represented by a firmware node and hence allow them to being referenced e.g. for use with blk-nvmem. Signed-off-by: Daniel Golle --- block/partitions/core.c | 40 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) diff --git a/block/partitions/core.c b/block/partitions/core.c index ab76e64f0f6c..f88829e254e6 100644 --- a/block/partitions/core.c +++ b/block/partitions/core.c @@ -10,6 +10,8 @@ #include #include #include +#include + #include "check.h" static int (*const check_part[])(struct parsed_partitions *) = { @@ -281,6 +283,42 @@ static ssize_t whole_disk_show(struct device *dev, } static const DEVICE_ATTR(whole_disk, 0444, whole_disk_show, NULL); +static struct fwnode_handle *find_partition_fwnode(struct block_device *bdev) +{ + struct fwnode_handle *fw_parts, *fw_part; + struct device *ddev = disk_to_dev(bdev->bd_disk); + const char *partname, *uuid; + u32 partno; + + fw_parts = device_get_named_child_node(ddev, "partitions"); + if (!fw_parts) + fw_parts = device_get_named_child_node(ddev->parent, "partitions"); + + if (!fw_parts) + return NULL; + + fwnode_for_each_child_node(fw_parts, fw_part) { + if (!fwnode_property_read_string(fw_part, "uuid", &uuid) && + (!bdev->bd_meta_info || strlen(uuid) > PARTITION_META_INFO_UUIDLTH || + strncmp(uuid, bdev->bd_meta_info->uuid, PARTITION_META_INFO_UUIDLTH))) + continue; + + if (!fwnode_property_read_string(fw_part, "partname", &partname) && + (!bdev->bd_meta_info || strlen(uuid) > PARTITION_META_INFO_VOLNAMELTH || + strncmp(partname, bdev->bd_meta_info->volname, + PARTITION_META_INFO_VOLNAMELTH))) + continue; + + if (!fwnode_property_read_u32(fw_part, "partno", &partno) && + bdev_partno(bdev) != partno) + continue; + + return fw_part; + } + + return NULL; +} + /* * Must be called either with open_mutex held, before a disk can be opened or * after all disk users are gone. @@ -355,6 +393,8 @@ static struct block_device *add_partition(struct gendisk *disk, int partno, goto out_put; } + device_set_node(pdev, find_partition_fwnode(bdev)); + /* delay uevent until 'holders' subdir is created */ dev_set_uevent_suppress(pdev, 1); err = device_add(pdev);