From patchwork Tue Dec 12 02:46:02 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?WW9uZyBXdSAo5ZC05YuHKQ==?= X-Patchwork-Id: 13488423 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="L3KsD28y" Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 56F69EB; Mon, 11 Dec 2023 18:46:51 -0800 (PST) X-UUID: b1320406989811eea5db2bebc7c28f94-20231212 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:Content-Transfer-Encoding:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=IUt8l+91IoXVo1cpDt79bjGAdJRilmTqvcbGtD1y4Uw=; b=L3KsD28ySxOB1TVEHChyB0MKuFtyte//kfSf8RafnC2KdbIKzaZ7EQwyuWeOtR1N9Jl+n1eNGxDxucPhdwajRMqOPaoOa+uGkpehD23dAMUrGJWElck3EWtETwLUIwyAgp4rmjbgDw1X0SiMIc1MMZtnq2WM+G3vpLAwfaflyaE=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:0a8b12e0-5d37-4538-be00-ad48219a3b2b,IP:0,U RL:0,TC:0,Content:-25,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTIO N:release,TS:-25 X-CID-META: VersionHash:5d391d7,CLOUDID:ec85ad73-1bd3-4f48-b671-ada88705968c,B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:11|1,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,TF_CID_SPAM_ULN X-UUID: b1320406989811eea5db2bebc7c28f94-20231212 Received: from mtkmbs14n1.mediatek.inc [(172.21.101.75)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 154741472; Tue, 12 Dec 2023 10:46:47 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n2.mediatek.inc (172.21.101.183) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Tue, 12 Dec 2023 10:46:45 +0800 Received: from mhfsdcap04.gcn.mediatek.inc (10.17.3.154) by mtkmbs11n2.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.2.1118.26 via Frontend Transport; Tue, 12 Dec 2023 10:46:44 +0800 From: Yong Wu To: Rob Herring , Sumit Semwal , , Matthias Brugger CC: Krzysztof Kozlowski , Conor Dooley , Benjamin Gaignard , Brian Starkey , John Stultz , , AngeloGioacchino Del Regno , Yong Wu , , , , , , , , , , Vijayanand Jitta , Joakim Bech , Jeffrey Kardatzke , Nicolas Dufresne , Subject: [PATCH v3 2/7] dma-buf: heaps: Initialize a secure heap Date: Tue, 12 Dec 2023 10:46:02 +0800 Message-ID: <20231212024607.3681-3-yong.wu@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20231212024607.3681-1-yong.wu@mediatek.com> References: <20231212024607.3681-1-yong.wu@mediatek.com> Precedence: bulk X-Mailing-List: linux-media@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-TM-AS-Product-Ver: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-AS-Result: No-10-0.162000-8.000000 X-TMASE-MatchedRID: jFGZ1KSu+yPtAxjyNphE0lz+axQLnAVB5Y0kb0hqatw1LB46LFAAkpkC erFMaabiXQS0szagh4NSeVWfRpnv1OG0fWP55EEGma6DzXaohvPJ5SXtoJPLyO0JEDP8WtN7rVb mNWMCsmqzR95c6Z6Roe1oMOv2nr2N0H/zLeBgX28SDAzxRL+lMVg3VqSTJ7SoYdn5x3tXIpeSLr afNpSUmkpqm9YsoMoIEAhIuZPp0MQfE8yM4pjsDzXJPZYaymc4xEHRux+uk8gVPU8Gz4xVjZgtw ixx9AosTJt/087qXILnCRyFIAHTrUDilNfZzLJbW496KV7WSvGDSsK68ZB5JuO5WhTxlk3SeI9M zgCvEUcpDHQ3eKOza7W994ja5xiQ8jae4OD13tAV7Mc+rowcVKtX/F0pBwVJjSV5hDFby7aYnYB 3Lm7XsQ== X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10-0.162000-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: DCCFB0A26993BC3E487D177E281AF68FA8257BAA72E1133602723C55C68896A82000:8 X-MTK: N Initialize a secure heap. Currently just add a null heap, Prepare for the later patches. Signed-off-by: Yong Wu --- drivers/dma-buf/heaps/Kconfig | 6 +++ drivers/dma-buf/heaps/Makefile | 1 + drivers/dma-buf/heaps/secure_heap.c | 67 +++++++++++++++++++++++++++++ drivers/dma-buf/heaps/secure_heap.h | 22 ++++++++++ 4 files changed, 96 insertions(+) create mode 100644 drivers/dma-buf/heaps/secure_heap.c create mode 100644 drivers/dma-buf/heaps/secure_heap.h diff --git a/drivers/dma-buf/heaps/Kconfig b/drivers/dma-buf/heaps/Kconfig index a5eef06c4226..3a9943e94200 100644 --- a/drivers/dma-buf/heaps/Kconfig +++ b/drivers/dma-buf/heaps/Kconfig @@ -12,3 +12,9 @@ config DMABUF_HEAPS_CMA Choose this option to enable dma-buf CMA heap. This heap is backed by the Contiguous Memory Allocator (CMA). If your system has these regions, you should say Y here. + +config DMABUF_HEAPS_SECURE + bool "DMA-BUF Secure Heap" + depends on DMABUF_HEAPS + help + Choose this option to enable dma-buf secure heap. If in doubt, say N. diff --git a/drivers/dma-buf/heaps/Makefile b/drivers/dma-buf/heaps/Makefile index 974467791032..b1ad9d1f2fbe 100644 --- a/drivers/dma-buf/heaps/Makefile +++ b/drivers/dma-buf/heaps/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0 +obj-$(CONFIG_DMABUF_HEAPS_SECURE) += secure_heap.o obj-$(CONFIG_DMABUF_HEAPS_SYSTEM) += system_heap.o obj-$(CONFIG_DMABUF_HEAPS_CMA) += cma_heap.o diff --git a/drivers/dma-buf/heaps/secure_heap.c b/drivers/dma-buf/heaps/secure_heap.c new file mode 100644 index 000000000000..e087da5638aa --- /dev/null +++ b/drivers/dma-buf/heaps/secure_heap.c @@ -0,0 +1,67 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * DMABUF secure heap exporter + * + * Copyright (C) 2023 MediaTek Inc. + */ + +#include +#include +#include +#include + +#include "secure_heap.h" + +static struct dma_buf * +secure_heap_allocate(struct dma_heap *heap, unsigned long size, + unsigned long fd_flags, unsigned long heap_flags) +{ + struct secure_buffer *sec_buf; + DEFINE_DMA_BUF_EXPORT_INFO(exp_info); + struct dma_buf *dmabuf; + int ret; + + sec_buf = kzalloc(sizeof(*sec_buf), GFP_KERNEL); + if (!sec_buf) + return ERR_PTR(-ENOMEM); + + sec_buf->size = ALIGN(size, PAGE_SIZE); + sec_buf->heap = heap; + + exp_info.exp_name = dma_heap_get_name(heap); + exp_info.size = sec_buf->size; + exp_info.flags = fd_flags; + exp_info.priv = sec_buf; + + dmabuf = dma_buf_export(&exp_info); + if (IS_ERR(dmabuf)) { + ret = PTR_ERR(dmabuf); + goto err_free_buf; + } + + return dmabuf; + +err_free_buf: + kfree(sec_buf); + return ERR_PTR(ret); +} + +static const struct dma_heap_ops sec_heap_ops = { + .allocate = secure_heap_allocate, +}; + +int secure_heap_add(struct secure_heap *sec_heap) +{ + struct dma_heap_export_info exp_info; + struct dma_heap *heap; + + exp_info.name = sec_heap->name; + exp_info.ops = &sec_heap_ops; + exp_info.priv = (void *)sec_heap; + + heap = dma_heap_add(&exp_info); + if (IS_ERR(heap)) + return PTR_ERR(heap); + return 0; +} +EXPORT_SYMBOL_GPL(secure_heap_add); diff --git a/drivers/dma-buf/heaps/secure_heap.h b/drivers/dma-buf/heaps/secure_heap.h new file mode 100644 index 000000000000..50733dc6d4db --- /dev/null +++ b/drivers/dma-buf/heaps/secure_heap.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Secure heap Header. + * + * Copyright (C) 2023 MediaTek, Inc. + */ + +#ifndef _DMABUF_SECURE_HEAP_H_ +#define _DMABUF_SECURE_HEAP_H_ + +struct secure_buffer { + struct dma_heap *heap; + size_t size; +}; + +struct secure_heap { + const char *name; +}; + +int secure_heap_add(struct secure_heap *sec_heap); + +#endif