From patchwork Fri Jan 12 09:20:10 2024 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: 13518056 Received: from mailgw02.mediatek.com (unknown [210.61.82.184]) (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 A6B9655C05; Fri, 12 Jan 2024 09:21:03 +0000 (UTC) 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="TD9sqqYI" X-UUID: e5792f18b12b11eea2298b7352fd921d-20240112 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=6jHIiPkYdMqrIuViIDt09m/oNMLq/0qMbZqFoJXbNq8=; b=TD9sqqYIY5f+voXnqFuUeaiG7sOiy6ohkg3BKaAJwktv05l2zpep8PsoIk5lNQ9toA2slerzjC7M2yBX4Wk0LyrLDfUQ9GAnSW2UFkIw7qbtDrbX4AzwE/WFjZcGjFF4Ak8tFRnVOUO3sep+Bal8dtH6YilWJ6Oel/eAP2DcORQ=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.35,REQID:5526147d-f6e3-44a3-b444-a2d928507d93,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:dd5ac782-8d4f-477b-89d2-1e3bdbef96d1,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: e5792f18b12b11eea2298b7352fd921d-20240112 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw02.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1197223448; Fri, 12 Jan 2024 17:20:58 +0800 Received: from mtkmbs11n2.mediatek.inc (172.21.101.187) by mtkmbs10n1.mediatek.inc (172.21.101.34) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.26; Fri, 12 Jan 2024 17:20:55 +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; Fri, 12 Jan 2024 17:20:53 +0800 From: Yong Wu To: Rob Herring , Matthias Brugger , , Sumit Semwal CC: Krzysztof Kozlowski , Conor Dooley , Benjamin Gaignard , Brian Starkey , John Stultz , , AngeloGioacchino Del Regno , Yong Wu , , , , , , , , Robin Murphy , Vijayanand Jitta , Joakim Bech , Jeffrey Kardatzke , "Pavel Machek" , Simon Ser , Pekka Paalanen , , , Subject: [PATCH v4 3/7] dma-buf: heaps: restricted_heap: Add private heap ops Date: Fri, 12 Jan 2024 17:20:10 +0800 Message-ID: <20240112092014.23999-4-yong.wu@mediatek.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20240112092014.23999-1-yong.wu@mediatek.com> References: <20240112092014.23999-1-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--2.237500-8.000000 X-TMASE-MatchedRID: iSQL5szRvdExaBEU4bKrV0hEDfw/93BuMApqy5cfknVX4H/AHZTAKiyG 2FFo0u8oRHLRFcKKZXfbCHv011Gy9ZCoy9iDotiwzfqlpbtmcWiH7D1bP/FcOrXvDHySC+eU+a/ zdHOJ3WkVrfWt68rqN2a39PjWf0NNHxPMjOKY7A8LbigRnpKlKSBuGJWwgxArX1upngn1GyfAxT 6U8SDb8vUxfqD56Kpg95Wd/WEnd3Q/A2ducvlnMYZSLT91ovb7o0pTThB0QTAQDF6kcoF++1KIU FLF1m+Y8mf/2A2Ja/Zpp55fZDlsr34cY/B7JqXaYZ1R7NXn0MdBmmCXcKyFFJ6oP1a0mRIj X-TM-AS-User-Approved-Sender: No X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--2.237500-8.000000 X-TMASE-Version: SMEX-14.0.0.3152-9.1.1006-23728.005 X-TM-SNTS-SMTP: E17AEBE1573EE56AA0E5BF0CDAEE0C2195895CC9F7701A5D61573FE5E60280622000:8 X-MTK: N Add "struct restricted_heap_ops". For the restricted memory, totally there are two steps: a) memory_alloc: Allocate the buffer in kernel; b) memory_restrict: Restrict/Protect/Secure that buffer. The memory_alloc is mandatory while memory_restrict is optinal since it may be part of memory_alloc. Signed-off-by: Yong Wu --- drivers/dma-buf/heaps/restricted_heap.c | 41 ++++++++++++++++++++++++- drivers/dma-buf/heaps/restricted_heap.h | 12 ++++++++ 2 files changed, 52 insertions(+), 1 deletion(-) diff --git a/drivers/dma-buf/heaps/restricted_heap.c b/drivers/dma-buf/heaps/restricted_heap.c index fd7c82abd42e..8c266a0f6192 100644 --- a/drivers/dma-buf/heaps/restricted_heap.c +++ b/drivers/dma-buf/heaps/restricted_heap.c @@ -12,10 +12,44 @@ #include "restricted_heap.h" +static int +restricted_heap_memory_allocate(struct restricted_heap *heap, struct restricted_buffer *buf) +{ + const struct restricted_heap_ops *ops = heap->ops; + int ret; + + ret = ops->memory_alloc(heap, buf); + if (ret) + return ret; + + if (ops->memory_restrict) { + ret = ops->memory_restrict(heap, buf); + if (ret) + goto memory_free; + } + return 0; + +memory_free: + ops->memory_free(heap, buf); + return ret; +} + +static void +restricted_heap_memory_free(struct restricted_heap *heap, struct restricted_buffer *buf) +{ + const struct restricted_heap_ops *ops = heap->ops; + + if (ops->memory_unrestrict) + ops->memory_unrestrict(heap, buf); + + ops->memory_free(heap, buf); +} + static struct dma_buf * restricted_heap_allocate(struct dma_heap *heap, unsigned long size, unsigned long fd_flags, unsigned long heap_flags) { + struct restricted_heap *restricted_heap = dma_heap_get_drvdata(heap); struct restricted_buffer *restricted_buf; DEFINE_DMA_BUF_EXPORT_INFO(exp_info); struct dma_buf *dmabuf; @@ -28,6 +62,9 @@ restricted_heap_allocate(struct dma_heap *heap, unsigned long size, restricted_buf->size = ALIGN(size, PAGE_SIZE); restricted_buf->heap = heap; + ret = restricted_heap_memory_allocate(restricted_heap, restricted_buf); + if (ret) + goto err_free_buf; exp_info.exp_name = dma_heap_get_name(heap); exp_info.size = restricted_buf->size; exp_info.flags = fd_flags; @@ -36,11 +73,13 @@ restricted_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_restricted_mem; } return dmabuf; +err_free_restricted_mem: + restricted_heap_memory_free(restricted_heap, restricted_buf); err_free_buf: kfree(restricted_buf); return ERR_PTR(ret); diff --git a/drivers/dma-buf/heaps/restricted_heap.h b/drivers/dma-buf/heaps/restricted_heap.h index 443028f6ba3b..ddeaf9805708 100644 --- a/drivers/dma-buf/heaps/restricted_heap.h +++ b/drivers/dma-buf/heaps/restricted_heap.h @@ -15,6 +15,18 @@ struct restricted_buffer { struct restricted_heap { const char *name; + + const struct restricted_heap_ops *ops; +}; + +struct restricted_heap_ops { + int (*heap_init)(struct restricted_heap *heap); + + int (*memory_alloc)(struct restricted_heap *heap, struct restricted_buffer *buf); + void (*memory_free)(struct restricted_heap *heap, struct restricted_buffer *buf); + + int (*memory_restrict)(struct restricted_heap *heap, struct restricted_buffer *buf); + void (*memory_unrestrict)(struct restricted_heap *heap, struct restricted_buffer *buf); }; int restricted_heap_add(struct restricted_heap *rstrd_heap);