From 49a1a4becb2deaeb5764dfe4022807b147b87b9c Mon Sep 17 00:00:00 2001
From: Mark Kettenis <kettenis@openbsd.org>
Date: Sat, 21 Jan 2023 20:27:53 +0100
Subject: test: Add test for IOMMU uclass map/unmap ops

Test that the map and unmap operations work for devices that
have DMA translated by an IOMMU and devices that don't have
DMA translated by an IOMMU.

Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Reviewed-by: Simon Glass <sjg@chromium.org>
---
 test/dm/iommu.c | 44 +++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 43 insertions(+), 1 deletion(-)

(limited to 'test')

diff --git a/test/dm/iommu.c b/test/dm/iommu.c
index 94174a7482b..6f932ef233f 100644
--- a/test/dm/iommu.c
+++ b/test/dm/iommu.c
@@ -8,12 +8,16 @@
 #include <dm/test.h>
 #include <dm/uclass-internal.h>
 #include <iommu.h>
+#include <malloc.h>
 #include <test/test.h>
 #include <test/ut.h>
+#include <asm/io.h>
 
 static int dm_test_iommu(struct unit_test_state *uts)
 {
 	struct udevice *dev;
+	dma_addr_t dva;
+	void *addr;
 
 	ut_assertok(uclass_find_device(UCLASS_IOMMU, 0, &dev));
 	ut_assert(!(dev_get_flags(dev) & DM_FLAG_ACTIVATED));
@@ -22,7 +26,45 @@ static int dm_test_iommu(struct unit_test_state *uts)
 	ut_assertok(uclass_probe_all(UCLASS_USB));
 	ut_assert(dev_get_flags(dev) & DM_FLAG_ACTIVATED);
 
+	addr = malloc(256);
+	ut_assert(addr);
+
+	ut_assertok(uclass_find_device(UCLASS_USB, 0, &dev));
+	dva = dev_iommu_dma_map(dev, addr, 256);
+	ut_assert(dva >= 0x89abc000 && dva < 0x89ac00000);
+
+	dev_iommu_dma_unmap(dev, dva, 256);
+
+	free(addr);
+
 	return 0;
 }
-
 DM_TEST(dm_test_iommu, UT_TESTF_SCAN_FDT);
+
+static int dm_test_iommu_noiommu(struct unit_test_state *uts)
+{
+	struct udevice *dev;
+	dma_addr_t dva;
+	void *addr;
+
+	ut_assertok(uclass_find_device(UCLASS_IOMMU, 0, &dev));
+	ut_assert(!(dev_get_flags(dev) & DM_FLAG_ACTIVATED));
+
+	/* Probing ethernet should not probe the IOMMU */
+	ut_assertok(uclass_probe_all(UCLASS_ETH));
+	ut_assert(!(dev_get_flags(dev) & DM_FLAG_ACTIVATED));
+
+	addr = malloc(256);
+	ut_assert(addr);
+
+	ut_assertok(uclass_find_device(UCLASS_ETH, 0, &dev));
+	dva = dev_iommu_dma_map(dev, addr, 256);
+	ut_assert(dva == virt_to_phys(addr));
+
+	dev_iommu_dma_unmap(dev, dva, 256);
+
+	free(addr);
+
+	return 0;
+}
+DM_TEST(dm_test_iommu_noiommu, UT_TESTF_SCAN_FDT);
-- 
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