From mboxrd@z Thu Jan 1 00:00:00 1970 From: Yong Wu Subject: [PATCH v4 08/18] iommu/mediatek: Add larb-id remapped support Date: Sat, 8 Dec 2018 16:39:21 +0800 Message-ID: <1544258371-4600-9-git-send-email-yong.wu@mediatek.com> References: <1544258371-4600-1-git-send-email-yong.wu@mediatek.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <1544258371-4600-1-git-send-email-yong.wu-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Joerg Roedel , Matthias Brugger , Robin Murphy , Rob Herring Cc: youlin.pei-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Nicolas Boichat , arnd-r2nGTMty4D4@public.gmane.org, srv_heupstream-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, Will Deacon , linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, Tomasz Figa , iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-mediatek-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org, Arvind Yadav , yingjoe.chen-NuS5LvNUpcJWk0Htik3J/w@public.gmane.org, linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org List-Id: devicetree@vger.kernel.org The larb-id may be remapped in the smi-common, this means the larb-id reported in the mtk_iommu_isr isn't the real larb-id, Take mt8183 as a example: M4U | --------------------------------------------- | SMI common | -0-----7-----5-----6-----1-----2------3-----4- <- Id remapped | | | | | | | | larb0 larb1 IPU0 IPU1 larb4 larb5 larb6 CCU disp vdec img cam venc img cam As above, larb0 connects with the id 0 in smi-common. larb1 connects with the id 7 in smi-common. ... If the larb-id reported in the isr is 7, actually it's larb1(vdec). In order to output the right larb-id in the isr, we add a larb-id remapping relationship in this patch. This also is a preparing patch for mt8183. Signed-off-by: Yong Wu --- drivers/iommu/mtk_iommu.c | 3 +++ drivers/iommu/mtk_iommu.h | 4 ++++ 2 files changed, 7 insertions(+) diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c index eda062a..8ab3b69 100644 --- a/drivers/iommu/mtk_iommu.c +++ b/drivers/iommu/mtk_iommu.c @@ -220,6 +220,9 @@ static irqreturn_t mtk_iommu_isr(int irq, void *dev_id) fault_larb = F_MMU0_INT_ID_LARB_ID(regval); fault_port = F_MMU0_INT_ID_PORT_ID(regval); + if (data->plat_data->larbid_remap_enable) + fault_larb = data->plat_data->larbid_remapped[fault_larb]; + if (report_iommu_fault(&dom->domain, data->dev, fault_iova, write ? IOMMU_FAULT_WRITE : IOMMU_FAULT_READ)) { dev_err_ratelimited( diff --git a/drivers/iommu/mtk_iommu.h b/drivers/iommu/mtk_iommu.h index b8749ac..3877050 100644 --- a/drivers/iommu/mtk_iommu.h +++ b/drivers/iommu/mtk_iommu.h @@ -47,6 +47,10 @@ struct mtk_iommu_plat_data { /* HW will use the EMI clock if there isn't the "bclk". */ bool has_bclk; + + /* The larb-id may be remapped in the smi-common. */ + bool larbid_remap_enable; + unsigned int larbid_remapped[MTK_LARB_NR_MAX]; }; struct mtk_iommu_domain; -- 1.9.1