From patchwork Wed Jul 10 08:41:59 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?U2h1bi1ZaSBXYW5nICjnjovpoIblhIQp?= X-Patchwork-Id: 13729053 Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) (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 AD684D535; Wed, 10 Jul 2024 08:42:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=60.244.123.138 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720600961; cv=none; b=diGbVho7gWEOTmJyUWGft2YyJYzB/i21tHHJ4Waa0YIPOiFWYInsVlXBsqNud1+bVXqnAdMh9hq1wO0SoUGfSrXdXsoBxB9XXRlkgv6hdgwAD7oPPNJFQyUAg8zJ5+r6vQhkKY4s0nyfiGSxVXRrN1QWPzgtHFOCRg4khUsxSzM= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1720600961; c=relaxed/simple; bh=/cSixCFKERN/J7DRtssnHK2SWpy1fqsCyCoIL53VSHw=; h=From:To:CC:Subject:Date:Message-ID:MIME-Version:Content-Type; b=BWDpAHeruqOgKcKb6RwtHc+N3y6YJIx/CGuc3mzFLIR4mEVpsdJQ2+g5510PqTu4rr43/Oeucn8EHvqMAJRl0v4pN/w6qTLTnGdftnLCeir002F7T2dzLbalHxrXAGrYEQmFI3a/5SBmAemWP6Lb/Iap244d93BYyCZzmFNoJ68= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com; spf=pass smtp.mailfrom=mediatek.com; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b=fctuXaPG; arc=none smtp.client-ip=60.244.123.138 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=mediatek.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mediatek.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="fctuXaPG" X-UUID: 54ca3f843e9811efb5b96b43b535fdb4-20240710 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=00qi1vCjVrBTnoMM1ymQIUcx+b2b5UPxjpcAqXcyXco=; b=fctuXaPG4XNC8Fosfr6HyRUpTLneQC6ks+9KSIYTKQFaeHHUw2ZBUvuf1BIwkHcXh8mBdYzrs2yI4FeXbkn41uthyGpoV9+lpGC+Uw7hXCGEeMgMRyh2u8K5EVTGGBt6Lf7C4klTOQhGjHM/OW0I6phTVfl44eIAsm2UA5/xPHY=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.40,REQID:1ec12272-4b5e-483a-b3fa-59c4e5725506,IP:0,U RL:0,TC:0,Content:35,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION :release,TS:35 X-CID-META: VersionHash:ba885a6,CLOUDID:5683490d-46b0-425a-97d3-4623fe284021,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:4,EDM:-3,IP:nil,U RL:11|1,File:nil,RT: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,ARC:0 X-CID-BVR: 0,NGT X-CID-BAS: 0,NGT,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR,TF_CID_SPAM_ULN X-UUID: 54ca3f843e9811efb5b96b43b535fdb4-20240710 Received: from mtkmbs13n1.mediatek.inc [(172.21.101.193)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1828831548; Wed, 10 Jul 2024 16:42:25 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) by MTKMBS09N2.mediatek.inc (172.21.101.94) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Wed, 10 Jul 2024 01:42:24 -0700 Received: from mtksdccf07.mediatek.inc (172.21.84.99) by mtkmbs13n1.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Wed, 10 Jul 2024 16:42:24 +0800 From: Shun-yi Wang To: Bjorn Andersson , Mathieu Poirier CC: Matthias Brugger , AngeloGioacchino Del Regno , , , , , , , , , shun-yi.wang Subject: [PATCH RFC 0/1] Support CMA regions Date: Wed, 10 Jul 2024 16:41:59 +0800 Message-ID: <20240710084200.6561-1-shun-yi.wang@mediatek.com> X-Mailer: git-send-email 2.18.0 Precedence: bulk X-Mailing-List: linux-remoteproc@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MTK: N From: "shun-yi.wang" In order to reserve specific Contiguous Memory Allocator (CMA) regions for hardware use. When the name of the reserved region contains "cma", then a corresponding CMA heap is added. In the DTS (Device Tree Source), we may have several memory regions with different names, e.g., &scp { ... memory-region = <&mem_reserved_1>, <&mem_reserved_2>; }; mem_reserved_1: xxx-xxx-region { ... }; mem_reserved_2: xxx-xxx-cma-region { ... }; When the name of the region contains "cma", a corresponding heap allocator is added by cma_heap_add(). However, we are unsure if using the name "cma" as an identifier is a good practice. I sincerely hope that you can provide me some suggestions, thanks. Especially within the segment of '#ifdef CONFIG_DMA_BUF_HEAPS_CMA' Note: The cma_heap_add() is introduced from this patch: dma-buf: heaps: Introduce cma_heap_add() for non-default CMA heap shun-yi.wang (1): remoteproc: mediatek: Support reserved CMA regions drivers/remoteproc/mtk_scp.c | 38 ++++++++++++++++++++++++++++-------- 1 file changed, 30 insertions(+), 8 deletions(-)