From patchwork Wed Nov 1 15:37:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bo Ye X-Patchwork-Id: 13442904 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 377C6C4332F for ; Wed, 1 Nov 2023 15:58:36 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:Message-ID:Date:Subject:CC :To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=xlfM5Y3gefGAElA1RTDhoOV9EFlZc7t+bHgP+KtoEn8=; b=F17LcWfd2+a4yE gtEmkNdCu2uYCmXwjGXl2R6tTPm2FyzyCYP5q41PimdqTE9KQ0PXyEWDuEBGUyCGbAuNjQRmXM3AL a7GK11689L2DC7Fu9NIOqV0sjtATqLv+eyeMzOh/Bp2nU2EMYdK8cRi+teaUGiThjX9EirmEPd0Br /uvKoPEjasDl6GjkCqyxx6ZMdSs7ADjoBYu1zqbQXqspVbTblhwLTM/7lWL90tEfkbNQjZssSbXF5 WJ3C42p4bM2qYE/RxTt1AFOoxCUYUiMzkSOOudnOwDX3z/0hhq6i1ivdREiwXYOLn8QIuIudxz3zv M+LDf80KdJThSB/E+ZNQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qyDbX-007mae-0O; Wed, 01 Nov 2023 15:58:03 +0000 Received: from mailgw01.mediatek.com ([216.200.240.184]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qyDbR-007mZi-02; Wed, 01 Nov 2023 15:58:00 +0000 X-UUID: 6a33816c78cf11ee9b7791016c24628a-20231101 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=Ov9TiPDknb6R9yF2IVYZFuRm6kOrz1Qf6/9qeS+Jpgw=; b=eRKHuDNR7dwvvJC73Gf2FnXBKgTtvdU2LnK0b/TF9b04figWWQG0nT55jpzRc63BdYeulD1QNeCi7J/BirD08Ye9h1aeFYDNAzXlj5abPelL2N1B4DAjuS+D3WkKujoZy4g79VhTkECX9hKXLsjrDDIDDO0qsW4lnvdDg0q4h0M=; X-CID-CACHE: Type:Local,Time:202311010849-07,HitQuantity:1 X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.33,REQID:fe422fb5-f3c9-427d-ab9e-a15d51e95809,IP:0,U RL:0,TC:0,Content:-5,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:-5 X-CID-META: VersionHash:364b77b,CLOUDID:c53de694-10ce-4e4b-85c2-c9b5229ff92b,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,File:nil,Bulk:nil,QS:nil,BEC:nil,COL:0,OSI:0,OSA:0,AV:0,LES:1,SPR:NO, DKR:0,DKP:0,BRR:0,BRE:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: 6a33816c78cf11ee9b7791016c24628a-20231101 Received: from mtkmbs11n1.mediatek.inc [(172.21.101.185)] by mailgw01.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1827127839; Wed, 01 Nov 2023 08:57:53 -0700 Received: from mtkmbs11n1.mediatek.inc (172.21.101.185) by mtkmbs13n1.mediatek.inc (172.21.101.193) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 1 Nov 2023 23:37:49 +0800 Received: from mcddlt001.gcn.mediatek.inc (10.19.240.15) by mtkmbs11n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 1 Nov 2023 23:37:48 +0800 From: Bo Ye To: Ulf Hansson , Matthias Brugger , AngeloGioacchino Del Regno CC: , , , , , , , Subject: [PATCH] mmc: add wp_grp_size node Date: Wed, 1 Nov 2023 23:37:37 +0800 Message-ID: <20231101153738.118659-1-bo.ye@mediatek.com> X-Mailer: git-send-email 2.17.0 MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231101_085757_058214_00C5B43A X-CRM114-Status: GOOD ( 17.33 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: "lin.gui" Detail: Add node "wp_grp_size", corresponding to WP_GRP_SIZE (write protect group size) of eMMC's CSD register. Scenario: The eMMC card can be set into write-protected mode to prevent data from being accidentally modified or deleted. Wp_grp_size (Write Protect Group Size) refers to an attribute of the eMMC card, used to manage write protection, and is the CSD register [36:32] of the eMMC device. Wp_grp_size (Write Protect Group Size) indicates how many eMMC blocks are contained in each write protection group on the eMMC card. Final rendered file: "/sys/class/mmc_host/mmc0/mmc0:0001/wp_grp_size" Signed-off-by: lin.gui Change-Id: I73952dbde2db375ba918daadb3264380b7863096 --- drivers/mmc/core/mmc.c | 16 +++++++++++++++- include/linux/mmc/card.h | 2 ++ 2 files changed, 17 insertions(+), 1 deletion(-) diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c index 4a4bab9aa726..9b67e49a9e63 100644 --- a/drivers/mmc/core/mmc.c +++ b/drivers/mmc/core/mmc.c @@ -136,6 +136,17 @@ static void mmc_set_erase_size(struct mmc_card *card) mmc_init_erase(card); } + +static void mmc_set_wp_grp_size(struct mmc_card *card) +{ + if (card->ext_csd.erase_group_def & 1) + card->wp_grp_size = card->ext_csd.hc_erase_size * + card->ext_csd.raw_hc_erase_gap_size; + else + card->wp_grp_size = card->csd.erase_size * + (card->csd.wp_grp_size + 1); +} + /* * Given a 128-bit response, decode to our card CSD structure. */ @@ -186,6 +197,7 @@ static int mmc_decode_csd(struct mmc_card *card) b = UNSTUFF_BITS(resp, 37, 5); csd->erase_size = (a + 1) * (b + 1); csd->erase_size <<= csd->write_blkbits - 9; + csd->wp_grp_size = UNSTUFF_BITS(resp, 32, 5); } return 0; @@ -791,6 +803,7 @@ MMC_DEV_ATTR(csd, "%08x%08x%08x%08x\n", card->raw_csd[0], card->raw_csd[1], MMC_DEV_ATTR(date, "%02d/%04d\n", card->cid.month, card->cid.year); MMC_DEV_ATTR(erase_size, "%u\n", card->erase_size << 9); MMC_DEV_ATTR(preferred_erase_size, "%u\n", card->pref_erase << 9); +MMC_DEV_ATTR(wp_grp_size, "%u\n", card->wp_grp_size << 9); MMC_DEV_ATTR(ffu_capable, "%d\n", card->ext_csd.ffu_capable); MMC_DEV_ATTR(hwrev, "0x%x\n", card->cid.hwrev); MMC_DEV_ATTR(manfid, "0x%06x\n", card->cid.manfid); @@ -851,6 +864,7 @@ static struct attribute *mmc_std_attrs[] = { &dev_attr_date.attr, &dev_attr_erase_size.attr, &dev_attr_preferred_erase_size.attr, + &dev_attr_wp_grp_size.attr, &dev_attr_fwrev.attr, &dev_attr_ffu_capable.attr, &dev_attr_hwrev.attr, @@ -1759,7 +1773,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr, mmc_set_erase_size(card); } } - + mmc_set_wp_grp_size(card); /* * Ensure eMMC user default partition is enabled */ diff --git a/include/linux/mmc/card.h b/include/linux/mmc/card.h index daa2f40d9ce6..62873ecc52f1 100644 --- a/include/linux/mmc/card.h +++ b/include/linux/mmc/card.h @@ -32,6 +32,7 @@ struct mmc_csd { unsigned int r2w_factor; unsigned int max_dtr; unsigned int erase_size; /* In sectors */ + unsigned int wp_grp_size; unsigned int read_blkbits; unsigned int write_blkbits; unsigned int capacity; @@ -304,6 +305,7 @@ struct mmc_card { unsigned int eg_boundary; /* don't cross erase-group boundaries */ unsigned int erase_arg; /* erase / trim / discard */ u8 erased_byte; /* value of erased bytes */ + unsigned int wp_grp_size; /* write group size in sectors */ u32 raw_cid[4]; /* raw card CID */ u32 raw_csd[4]; /* raw card CSD */