From patchwork Wed Apr 3 10:26:54 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?U2hhd24gU3VuZyAo5a6L5a2d6KyZKQ==?= X-Patchwork-Id: 13615749 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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 A75ADCD1294 for ; Wed, 3 Apr 2024 10:27:31 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 678BC1129A9; Wed, 3 Apr 2024 10:27:17 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=mediatek.com header.i=@mediatek.com header.b="epcyXjzP"; dkim-atps=neutral Received: from mailgw01.mediatek.com (unknown [60.244.123.138]) by gabe.freedesktop.org (Postfix) with ESMTPS id 94C091129A0 for ; Wed, 3 Apr 2024 10:27:12 +0000 (UTC) X-UUID: b6ade278f1a411eeb8927bc1f75efef4-20240403 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Type:MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:CC:To:From; bh=4lDY757TvdhBdVweLL8R40AiQq0CLs4BkWdV/XOzqqI=; b=epcyXjzPJfI/mY+uBYKH6a/B7ttU3kv9efhqBNtQb9qcM0sHQ1lJnZ6ys7rU1W+SJ+u+EcdRZO6dhBOTds1NN7MTKrUCw4wR0qeUubRTVxBvJgdS2t87f0W9+LGw0As5a9amh775LOeQO46mOyhmx/Y+R9hhTUQF8N7JrzJ0gSY=; X-CID-P-RULE: Release_Ham X-CID-O-INFO: VERSION:1.1.37, REQID:16440507-ce68-47e1-8797-6f206819c251, 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:6f543d0, CLOUDID:5471aa00-c26b-4159-a099-3b9d0558e447, B ulkID:nil,BulkQuantity:0,Recheck:0,SF:102,TC:nil,Content:0,EDM:-3,IP:nil,U RL:0,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 X-CID-BVR: 0 X-CID-BAS: 0,_,0,_ X-CID-FACTOR: TF_CID_SPAM_SNR X-UUID: b6ade278f1a411eeb8927bc1f75efef4-20240403 Received: from mtkmbs10n2.mediatek.inc [(172.21.101.183)] by mailgw01.mediatek.com (envelope-from ) (Generic MTA with TLSv1.2 ECDHE-RSA-AES256-GCM-SHA384 256/256) with ESMTP id 1260731026; Wed, 03 Apr 2024 18:27:03 +0800 Received: from mtkmbs13n1.mediatek.inc (172.21.101.193) 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, 3 Apr 2024 18:27:02 +0800 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, 3 Apr 2024 18:27:02 +0800 From: Shawn Sung To: Chun-Kuang Hu CC: Philipp Zabel , David Airlie , Daniel Vetter , Matthias Brugger , AngeloGioacchino Del Regno , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , Sumit Semwal , =?utf-8?q?Christian_K=C3=B6nig?= , , , , , , , Jason-JH.Lin , Hsiao Chien Sung Subject: [PATCH v5 2/9] drm/mediatek: Add secure buffer control flow to mtk_drm_gem Date: Wed, 3 Apr 2024 18:26:54 +0800 Message-ID: <20240403102701.369-3-shawn.sung@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20240403102701.369-1-shawn.sung@mediatek.com> References: <20240403102701.369-1-shawn.sung@mediatek.com> MIME-Version: 1.0 X-MTK: N X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: "Jason-JH.Lin" Add secure buffer control flow to mtk_drm_gem. When user space takes DRM_MTK_GEM_CREATE_ENCRYPTED flag and size to create a mtk_drm_gem object, mtk_drm_gem will find a matched size dma buffer from secure dma-heap and bind it to mtk_drm_gem object. Signed-off-by: Jason-JH.Lin Signed-off-by: Hsiao Chien Sung --- drivers/gpu/drm/mediatek/mtk_gem.c | 85 +++++++++++++++++++++++++++++- drivers/gpu/drm/mediatek/mtk_gem.h | 4 ++ 2 files changed, 88 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/mediatek/mtk_gem.c b/drivers/gpu/drm/mediatek/mtk_gem.c index e59e0727717b7..ec34d02c14377 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.c +++ b/drivers/gpu/drm/mediatek/mtk_gem.c @@ -4,6 +4,8 @@ */ #include +#include +#include #include #include @@ -102,6 +104,81 @@ struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev, return ERR_PTR(ret); } +struct mtk_gem_obj *mtk_gem_create_from_heap(struct drm_device *dev, + const char *heap, size_t size) +{ + struct mtk_drm_private *priv = dev->dev_private; + struct mtk_gem_obj *mtk_gem; + struct drm_gem_object *obj; + struct dma_heap *dma_heap; + struct dma_buf *dma_buf; + struct dma_buf_attachment *attach; + struct sg_table *sgt; + struct iosys_map map = {}; + int ret; + + mtk_gem = mtk_gem_init(dev, size); + if (IS_ERR(mtk_gem)) + return ERR_CAST(mtk_gem); + + obj = &mtk_gem->base; + + dma_heap = dma_heap_find(heap); + if (!dma_heap) { + DRM_ERROR("heap find fail\n"); + goto err_gem_free; + } + dma_buf = dma_heap_buffer_alloc(dma_heap, size, + O_RDWR | O_CLOEXEC, DMA_HEAP_VALID_HEAP_FLAGS); + if (IS_ERR(dma_buf)) { + DRM_ERROR("buffer alloc fail\n"); + dma_heap_put(dma_heap); + goto err_gem_free; + } + dma_heap_put(dma_heap); + + attach = dma_buf_attach(dma_buf, priv->dma_dev); + if (IS_ERR(attach)) { + DRM_ERROR("attach fail, return\n"); + dma_buf_put(dma_buf); + goto err_gem_free; + } + + sgt = dma_buf_map_attachment(attach, DMA_BIDIRECTIONAL); + if (IS_ERR(sgt)) { + DRM_ERROR("map failed, detach and return\n"); + dma_buf_detach(dma_buf, attach); + dma_buf_put(dma_buf); + goto err_gem_free; + } + obj->import_attach = attach; + mtk_gem->dma_addr = sg_dma_address(sgt->sgl); + mtk_gem->sg = sgt; + mtk_gem->size = dma_buf->size; + + if (!strcmp(heap, "mtk_svp") || !strcmp(heap, "mtk_svp_cma")) { + /* secure buffer can not be mapped */ + mtk_gem->secure = true; + } else { + ret = dma_buf_vmap(dma_buf, &map); + mtk_gem->kvaddr = map.vaddr; + if (ret) { + DRM_ERROR("map failed, ret=%d\n", ret); + dma_buf_unmap_attachment(attach, sgt, DMA_BIDIRECTIONAL); + dma_buf_detach(dma_buf, attach); + dma_buf_put(dma_buf); + mtk_gem->kvaddr = NULL; + } + } + + return mtk_gem; + +err_gem_free: + drm_gem_object_release(obj); + kfree(mtk_gem); + return ERR_PTR(-ENOMEM); +} + void mtk_gem_free_object(struct drm_gem_object *obj) { struct mtk_gem_obj *mtk_gem = to_mtk_gem_obj(obj); @@ -229,7 +306,9 @@ struct drm_gem_object *mtk_gem_prime_import_sg_table(struct drm_device *dev, if (IS_ERR(mtk_gem)) return ERR_CAST(mtk_gem); + mtk_gem->secure = !sg_page(sg->sgl); mtk_gem->dma_addr = sg_dma_address(sg->sgl); + mtk_gem->size = attach->dmabuf->size; mtk_gem->sg = sg; return &mtk_gem->base; @@ -304,7 +383,11 @@ int mtk_gem_create_ioctl(struct drm_device *dev, void *data, struct drm_mtk_gem_create *args = data; int ret; - mtk_gem = mtk_gem_create(dev, args->size, false); + if (args->flags & DRM_MTK_GEM_CREATE_ENCRYPTED) + mtk_gem = mtk_gem_create_from_heap(dev, "mtk_svp_cma", args->size); + else + mtk_gem = mtk_gem_create(dev, args->size, false); + if (IS_ERR(mtk_gem)) return PTR_ERR(mtk_gem); diff --git a/drivers/gpu/drm/mediatek/mtk_gem.h b/drivers/gpu/drm/mediatek/mtk_gem.h index 4d7598220ca8f..75cf50495abe0 100644 --- a/drivers/gpu/drm/mediatek/mtk_gem.h +++ b/drivers/gpu/drm/mediatek/mtk_gem.h @@ -27,9 +27,11 @@ struct mtk_gem_obj { void *cookie; void *kvaddr; dma_addr_t dma_addr; + size_t size; unsigned long dma_attrs; struct sg_table *sg; struct page **pages; + bool secure; }; #define to_mtk_gem_obj(x) container_of(x, struct mtk_gem_obj, base) @@ -37,6 +39,8 @@ struct mtk_gem_obj { void mtk_gem_free_object(struct drm_gem_object *gem); struct mtk_gem_obj *mtk_gem_create(struct drm_device *dev, size_t size, bool alloc_kmap); +struct mtk_gem_obj *mtk_gem_create_from_heap(struct drm_device *dev, + const char *heap, size_t size); int mtk_gem_dumb_create(struct drm_file *file_priv, struct drm_device *dev, struct drm_mode_create_dumb *args); struct sg_table *mtk_gem_prime_get_sg_table(struct drm_gem_object *obj);