From: Janghyuck Kim <janghyuck.kim@samsung.com>
Date: Thu, 8 Dec 2016 02:23:31 +0000 (+0900)
Subject: [COMMON] iommu/exynos: implement API to show status
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=b99d971ecfb521f44e1c8bdbc70d89eaa5789b8e;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git

[COMMON] iommu/exynos: implement API to show status

exynos_sysmmu_show_status() provides information of sysmmu status.

Change-Id: Ia448f085acd3b7d605941481f7799899940420f3
Signed-off-by: Janghyuck Kim <janghyuck.kim@samsung.com>
---

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index b4cabf54492b..230d2a9630cd 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -1547,10 +1547,37 @@ static struct iommu_ops exynos_iommu_ops = {
 	.of_xlate = exynos_iommu_of_xlate,
 };
 
-void exynos_sysmmu_show_status(struct device *dev)
+void exynos_sysmmu_show_status(struct device *master)
 {
-	/* DUMMY */
-	dev_info(dev, "Called sysmmu show status\n");
+	struct exynos_iommu_owner *owner;
+	struct sysmmu_list_data *list;
+
+	if (!has_sysmmu(master)) {
+		dev_err(master, "has no sysmmu!\n");
+		return;
+	}
+
+	owner = master->archdata.iommu;
+	list_for_each_entry(list, &owner->sysmmu_list, node) {
+		unsigned long flags;
+		struct sysmmu_drvdata *drvdata;
+
+		drvdata = dev_get_drvdata(list->sysmmu);
+
+		spin_lock_irqsave(&drvdata->lock, flags);
+		if (!is_sysmmu_active(drvdata) ||
+				!is_sysmmu_runtime_active(drvdata)) {
+			dev_info(drvdata->sysmmu,
+				"%s: SysMMU is not active\n", __func__);
+			spin_unlock_irqrestore(&drvdata->lock, flags);
+			continue;
+		}
+
+		dev_info(drvdata->sysmmu, "Dumping status.\n");
+		dump_sysmmu_status(drvdata->sfrbase);
+
+		spin_unlock_irqrestore(&drvdata->lock, flags);
+	}
 }
 
 static int sysmmu_fault_notifier(struct notifier_block *nb,