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Mon, 4 Nov 2019 19:52:55 +0800 From: Chao Hao To: Joerg Roedel , Rob Herring , "Matthias Brugger" Subject: [RESEND,PATCH 07/13] iommu/mediatek: Add smi_larb info about device Date: Mon, 4 Nov 2019 19:52:32 +0800 Message-ID: <20191104115238.2394-8-chao.hao@mediatek.com> X-Mailer: git-send-email 2.18.0 In-Reply-To: <20191104115238.2394-1-chao.hao@mediatek.com> References: <20191104115238.2394-1-chao.hao@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-20191104_040303_040734_FEAB46CB X-CRM114-Status: GOOD ( 15.36 ) X-Spam-Score: 0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [216.200.240.184 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record 0.0 SPF_HELO_NONE SPF: HELO does not publish an SPF Record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Anan Sun , devicetree@vger.kernel.org, Cui Zhang , Jun Yan , wsd_upstream@mediatek.com, linux-kernel@vger.kernel.org, Chao Hao , iommu@lists.linux-foundation.org, linux-mediatek@lists.infradead.org, Yong Wu , Miles Chen , linux-arm-kernel@lists.infradead.org, Guangming Cao Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org All the devices which used iommu are connected to SMI_larb port, so when different devices driver execute initialization, iommu can check larb_id and port_id to distinguish them and then make them match to iommu_group accordingly. We also add dom_cnt variable to describe the number of mtk_iommu_domain. Larb_id and port_id define can refer to "mtxxxx-larb-port.h(ex: mt6779-larb-port.h)" file Signed-off-by: Chao Hao --- drivers/iommu/mtk_iommu.c | 50 ++++++++++++++++++++++++++++++++------- drivers/iommu/mtk_iommu.h | 1 + 2 files changed, 43 insertions(+), 8 deletions(-) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index 27995b2b29a6..0eacbc473374 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -126,6 +126,7 @@ struct mtk_iommu_domain { struct mtk_iommu_pgtable { struct io_pgtable_cfg cfg; struct io_pgtable_ops *iop; + struct device *init_dev; struct list_head m4u_dom_v2; }; @@ -177,22 +178,35 @@ static struct mtk_iommu_data *mtk_iommu_get_m4u_data(void) return NULL; } -static u32 get_domain_id(void) +static u32 get_domain_id(struct mtk_iommu_data *data, u32 portid) { - /* only support one mtk_iommu_domain currently */ - return 0; + u32 dom_id = 0; + int i; + + /* only support one mtk_iommu_domain currently(dom_cnt = 1) */ + for (i = 0; i < data->plat_data->dom_cnt; i++) + return i; + + return dom_id; } -static u32 mtk_iommu_get_domain_id(void) +static u32 mtk_iommu_get_domain_id(struct device *dev) { - return get_domain_id(); + struct iommu_fwspec *fwspec = dev->iommu_fwspec; + struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; + u32 portid = fwspec->ids[0]; + + return get_domain_id(data, portid); } static struct mtk_iommu_domain *get_mtk_domain(struct device *dev) { struct mtk_iommu_data *data = dev->iommu_fwspec->iommu_priv; struct mtk_iommu_domain *dom; - u32 domain_id = mtk_iommu_get_domain_id(); + u32 domain_id = mtk_iommu_get_domain_id(dev); + + if (domain_id >= data->plat_data->dom_cnt) + return NULL; list_for_each_entry(dom, &data->pgtable->m4u_dom_v2, list) { if (dom->id == domain_id) @@ -431,11 +445,18 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) struct mtk_iommu_pgtable *pgtable = mtk_iommu_get_pgtable(); struct mtk_iommu_data *data = mtk_iommu_get_m4u_data(); struct mtk_iommu_domain *dom; + struct device *dev; if (type != IOMMU_DOMAIN_DMA) return NULL; - if (!pgtable) { + if (pgtable) { + dev = pgtable->init_dev; + if (!data->m4u_group) { + pr_err("%s, find m4u_group failed\n", __func__); + return NULL; + } + } else { pr_err("%s, pgtable is not ready\n", __func__); return NULL; } @@ -447,8 +468,11 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) if (iommu_get_dma_cookie(&dom->domain)) goto free_dom; + dom->id = mtk_iommu_get_domain_id(dev); + if (dom->id >= data->plat_data->dom_cnt) + goto put_dma_cookie; + dom->group = data->m4u_group; - dom->id = mtk_iommu_get_domain_id(); /* Update our support page sizes bitmap */ dom->domain.pgsize_bitmap = pgtable->cfg.pgsize_bitmap; @@ -459,6 +483,8 @@ static struct iommu_domain *mtk_iommu_domain_alloc(unsigned type) return &dom->domain; +put_dma_cookie: + iommu_put_dma_cookie(&dom->domain); free_dom: kfree(dom); return NULL; @@ -619,6 +645,10 @@ static struct iommu_group *mtk_iommu_device_group(struct device *dev) } else { iommu_group_ref_get(data->m4u_group); } + + /* save the latest init device */ + pgtable->init_dev = dev; + return data->m4u_group; } @@ -927,12 +957,14 @@ static const struct mtk_iommu_plat_data mt2712_data = { .has_4gb_mode = true, .has_bclk = true, .has_vld_pa_rng = true, + .dom_cnt = 1, .larbid_remap[0] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}, .inv_sel_reg = REG_MMU_INV_SEL, }; static const struct mtk_iommu_plat_data mt6779_data = { .m4u_plat = M4U_MT6779, + .dom_cnt = 1, .larbid_remap[0] = {0, 1, 2, 3, 5, 7, 10, 9}, /* vp6a, vp6b, mdla/core2, mdla/edmc*/ .larbid_remap[1] = {2, 0, 3, 1}, @@ -948,6 +980,7 @@ static const struct mtk_iommu_plat_data mt8173_data = { .has_4gb_mode = true, .has_bclk = true, .reset_axi = true, + .dom_cnt = 1, .larbid_remap[0] = {0, 1, 2, 3, 4, 5}, /* Linear mapping. */ .inv_sel_reg = REG_MMU_INV_SEL, }; @@ -955,6 +988,7 @@ static const struct mtk_iommu_plat_data mt8173_data = { static const struct mtk_iommu_plat_data mt8183_data = { .m4u_plat = M4U_MT8183, .reset_axi = true, + .dom_cnt = 1, .larbid_remap[0] = {0, 4, 5, 6, 7, 2, 3, 1}, .inv_sel_reg = REG_MMU_INV_SEL, }; diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index dd5f19f78b62..6801f8496fcc 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -49,6 +49,7 @@ struct mtk_iommu_plat_data { bool has_misc_ctrl[2]; u32 inv_sel_reg; u32 m4u1_mask; + u32 dom_cnt; unsigned char larbid_remap[2][MTK_LARB_NR_MAX]; };