From patchwork Tue Dec 12 02:46:03 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: 13488433 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 8867AC4332F for ; Tue, 12 Dec 2023 02:47:50 +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:References:In-Reply-To: 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: List-Owner; bh=39QEvCVY28wep+Iz3a3SGKFuswrIyNPBsGhaxJT/NB0=; b=36soWCKinUzPdr DML309f+OAfbFazm/bc48EKAz26fMyJok+0tFNvPbb2xCd2YQlezDXZK4FXyqO9jNxrJzGqauGnxt 5Sn4mBXQOdtbwuJNM0RGB/lsK0ue9AhvJiy9LxeAJ4zYmr6wv/Fl6eyklVMUBVkOKbRorCNO1Un9+ 3xBr9NNLGpsM6m0ZocYdpjwE+D//Arowi9y/IozZfo/GaF6HzxYKNdr7isnPCi1JLi8UA7kbkupoL vBNdAI2gMpp1PIx/ZXk5FPqGyitMfEV9aV65WXZDi+ri7ZiQ8nq3skVa84gBfObYVe7Rq7cPWPpX9 SpXrpgs2/PUBVlr+5ySA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rCsnq-00AYzP-2f; Tue, 12 Dec 2023 02:47:22 +0000 Received: from mailgw02.mediatek.com ([216.200.240.185]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1rCsnn-00AYx4-1g; Tue, 12 Dec 2023 02:47:20 +0000 X-UUID: c0fc9b3a989811ee958cff29c719f35b-20231211 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=3V6024Solz4jQYx03PCU2DnkByw7fBKMpDmrnrFyUcU=; b=pOmEvuXoxChbJWuq92cRacJm0mAMVy3dBVGjYOxuxr1fwA6Ek6HOSlnaku5zgJV37qK1aLd3vtkQ/4jXQ+QFldwXBMNYRpsVW24D9Qzs71ch8w95iFsjWoGXVkLQz5xezE7Vb3KihPJ3L5Pdk6OJmLRsYas3xHfWyWwPU05Adg8=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:289586e5-8c1c-4880-b1a7-7f506e88a976,IP:0,U RL:0,TC:0,Content:0,EDM:0,RT:0,SF:0,FILE:0,BULK:0,RULE:Release_Ham,ACTION: release,TS:0 X-CID-META: VersionHash:5d391d7,CLOUDID:8e87ad73-1bd3-4f48-b671-ada88705968c,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 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: c0fc9b3a989811ee958cff29c719f35b-20231211 Received: from mtkmbs13n2.mediatek.inc [(172.21.101.108)] by mailgw02.mediatek.com (envelope-from ) (musrelay.mediatek.com ESMTP with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 507502971; Mon, 11 Dec 2023 19:47:13 -0700 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs13n2.mediatek.inc (172.21.101.108) 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 10:46:55 +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 10:46:54 +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 3/7] dma-buf: heaps: secure_heap: Add private heap ops Date: Tue, 12 Dec 2023 10:46:03 +0800 Message-ID: <20231212024607.3681-4-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> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231211_184719_560979_9BE4A175 X-CRM114-Status: GOOD ( 16.37 ) 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 Add "struct secure_heap_ops". For the secure memory, totally there are two steps: a) memory_alloc: Allocate the buffer in kernel; b) secure_the_memory: Secure/Proect that buffer. The memory_alloc is mandatory while secure_the_memory is optinal since it may be part of memory_alloc. Signed-off-by: Yong Wu --- drivers/dma-buf/heaps/secure_heap.c | 39 ++++++++++++++++++++++++++++- drivers/dma-buf/heaps/secure_heap.h | 11 ++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/secure_heap.c b/drivers/dma-buf/heaps/secure_heap.c index e087da5638aa..925cf8e1c7ce 100644 --- a/drivers/dma-buf/heaps/secure_heap.c +++ b/drivers/dma-buf/heaps/secure_heap.c @@ -12,10 +12,42 @@ #include "secure_heap.h" +static int secure_heap_memory_allocate(struct secure_heap *sec_heap, struct secure_buffer *sec_buf) +{ + const struct secure_heap_ops *ops = sec_heap->ops; + int ret; + + ret = ops->memory_alloc(sec_heap, sec_buf); + if (ret) + return ret; + + if (ops->secure_the_memory) { + ret = ops->secure_the_memory(sec_heap, sec_buf); + if (ret) + goto sec_memory_free; + } + return 0; + +sec_memory_free: + ops->memory_free(sec_heap, sec_buf); + return ret; +} + +static void secure_heap_memory_free(struct secure_heap *sec_heap, struct secure_buffer *sec_buf) +{ + const struct secure_heap_ops *ops = sec_heap->ops; + + if (ops->unsecure_the_memory) + ops->unsecure_the_memory(sec_heap, sec_buf); + + ops->memory_free(sec_heap, sec_buf); +} + static struct dma_buf * secure_heap_allocate(struct dma_heap *heap, unsigned long size, unsigned long fd_flags, unsigned long heap_flags) { + struct secure_heap *sec_heap = dma_heap_get_drvdata(heap); struct secure_buffer *sec_buf; DEFINE_DMA_BUF_EXPORT_INFO(exp_info); struct dma_buf *dmabuf; @@ -28,6 +60,9 @@ secure_heap_allocate(struct dma_heap *heap, unsigned long size, sec_buf->size = ALIGN(size, PAGE_SIZE); sec_buf->heap = heap; + ret = secure_heap_memory_allocate(sec_heap, sec_buf); + if (ret) + goto err_free_buf; exp_info.exp_name = dma_heap_get_name(heap); exp_info.size = sec_buf->size; exp_info.flags = fd_flags; @@ -36,11 +71,13 @@ secure_heap_allocate(struct dma_heap *heap, unsigned long size, dmabuf = dma_buf_export(&exp_info); if (IS_ERR(dmabuf)) { ret = PTR_ERR(dmabuf); - goto err_free_buf; + goto err_free_sec_mem; } return dmabuf; +err_free_sec_mem: + secure_heap_memory_free(sec_heap, sec_buf); err_free_buf: kfree(sec_buf); return ERR_PTR(ret); diff --git a/drivers/dma-buf/heaps/secure_heap.h b/drivers/dma-buf/heaps/secure_heap.h index 50733dc6d4db..ec5349cd28d0 100644 --- a/drivers/dma-buf/heaps/secure_heap.h +++ b/drivers/dma-buf/heaps/secure_heap.h @@ -15,6 +15,17 @@ struct secure_buffer { struct secure_heap { const char *name; + + const struct secure_heap_ops *ops; +}; + +struct secure_heap_ops { + int (*memory_alloc)(struct secure_heap *sec_heap, struct secure_buffer *sec_buf); + void (*memory_free)(struct secure_heap *sec_heap, struct secure_buffer *sec_buf); + + /* Protect/unprotect the memory */ + int (*secure_the_memory)(struct secure_heap *sec_heap, struct secure_buffer *sec_buf); + void (*unsecure_the_memory)(struct secure_heap *sec_heap, struct secure_buffer *sec_buf); }; int secure_heap_add(struct secure_heap *sec_heap);