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Wed, 09 Dec 2020 00:13:01 -0800 Received: from MTKMBS07N2.mediatek.inc (172.21.101.141) by MTKMBS62N1.mediatek.inc (172.29.193.41) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 9 Dec 2020 00:04:18 -0800 Received: from MTKCAS06.mediatek.inc (172.21.101.30) by mtkmbs07n2.mediatek.inc (172.21.101.141) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Wed, 9 Dec 2020 16:04:17 +0800 Received: from localhost.localdomain (10.17.3.153) by MTKCAS06.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Wed, 9 Dec 2020 16:04:16 +0800 From: Yong Wu To: Joerg Roedel , Matthias Brugger , Rob Herring , Will Deacon , Robin Murphy Subject: [PATCH v5 19/27] iommu/mediatek: Add iova reserved function Date: Wed, 9 Dec 2020 16:00:54 +0800 Message-ID: <20201209080102.26626-20-yong.wu@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20201209080102.26626-1-yong.wu@mediatek.com> References: <20201209080102.26626-1-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-20201209_031303_734527_FF0DE487 X-CRM114-Status: GOOD ( 19.24 ) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: youlin.pei@mediatek.com, devicetree@vger.kernel.org, Nicolas Boichat , srv_heupstream@mediatek.com, chao.hao@mediatek.com, linux-kernel@vger.kernel.org, Evan Green , yong.wu@mediatek.com, Tomasz Figa , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, Krzysztof Kozlowski , anan.sun@mediatek.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org For multiple iommu_domains, we need to reserve some iova regions. Take a example, If the default iova region is 0 ~ 4G, but the 0x4000_0000 ~ 0x43ff_ffff is only for the special CCU0 domain. Thus we should exclude this region for the default iova region. This patch adds iova reserved flow. It's a preparing patch for supporting multi-domain. Signed-off-by: Anan sun Signed-off-by: Chao Hao Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 28 ++++++++++++++++++++++++++++ drivers/iommu/mtk_iommu.h | 5 +++++ 2 files changed, 33 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 0e9c03cbab32..6a909efc984f 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -157,6 +157,11 @@ static LIST_HEAD(m4ulist); /* List all the M4U HWs */ #define for_each_m4u(data) list_for_each_entry(data, &m4ulist, list) +struct mtk_iommu_iova_region { + dma_addr_t iova_base; + unsigned long long size; +}; + /* * There may be 1 or 2 M4U HWs, But we always expect they are in the same domain * for the performance. @@ -553,6 +558,27 @@ static int mtk_iommu_of_xlate(struct device *dev, struct of_phandle_args *args) return iommu_fwspec_add_ids(dev, args->args, 1); } +static void mtk_iommu_get_resv_regions(struct device *dev, + struct list_head *head) +{ + struct mtk_iommu_data *data = dev_iommu_priv_get(dev); + const struct mtk_iommu_iova_region *resv; + struct iommu_resv_region *region; + int prot = IOMMU_WRITE | IOMMU_READ; + unsigned int i; + + for (i = 0; i < data->plat_data->iova_region_nr; i++) { + resv = data->plat_data->iova_region + i; + + region = iommu_alloc_resv_region(resv->iova_base, resv->size, + prot, IOMMU_RESV_RESERVED); + if (!region) + return; + + list_add_tail(®ion->list, head); + } +} + static const struct iommu_ops mtk_iommu_ops = { .domain_alloc = mtk_iommu_domain_alloc, .domain_free = mtk_iommu_domain_free, @@ -567,6 +593,8 @@ static const struct iommu_ops mtk_iommu_ops = { .release_device = mtk_iommu_release_device, .device_group = mtk_iommu_device_group, .of_xlate = mtk_iommu_of_xlate, + .get_resv_regions = mtk_iommu_get_resv_regions, + .put_resv_regions = generic_iommu_put_resv_regions, .pgsize_bitmap = SZ_4K | SZ_64K | SZ_1M | SZ_16M, }; diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index 5e03a029c4dc..e867cd3aeeac 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -45,10 +45,15 @@ enum mtk_iommu_plat { M4U_MT8183, }; +struct mtk_iommu_iova_region; + struct mtk_iommu_plat_data { enum mtk_iommu_plat m4u_plat; u32 flags; u32 inv_sel_reg; + + unsigned int iova_region_nr; + const struct mtk_iommu_iova_region *iova_region; unsigned char larbid_remap[MTK_LARB_COM_MAX][MTK_LARB_SUBCOM_MAX]; }; -- 2.18.0 _______________________________________________ Linux-mediatek mailing list Linux-mediatek@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-mediatek