iommu/dart: Set DMA domain for locked DARTs

alyssarosenzweig · jannau · commit 6cf6a40ee335 · 2024-09-16T10:14:56.000+02:00
This is required.

Signed-off-by: Alyssa Rosenzweig &lt;alyssa@rosenzweig.io&gt;
diff --git a/drivers/iommu/apple-dart.c b/drivers/iommu/apple-dart.c
@@ -941,6 +941,8 @@ static int apple_dart_def_domain_type(struct device *dev)
 		return IOMMU_DOMAIN_IDENTITY;
 	if (!cfg->stream_maps[0].dart->supports_bypass)
 		return IOMMU_DOMAIN_DMA;
+	if (cfg->stream_maps[0].dart->locked)
+		return IOMMU_DOMAIN_DMA;
 
 	return 0;
 }

Original file line number	Diff line number	Diff line change
`@@ -941,6 +941,8 @@ static int apple_dart_def_domain_type(struct device *dev)`
`941`	`941`	`return IOMMU_DOMAIN_IDENTITY;`
`942`	`942`	`if (!cfg->stream_maps[0].dart->supports_bypass)`
`943`	`943`	`return IOMMU_DOMAIN_DMA;`
	`944`	`+ if (cfg->stream_maps[0].dart->locked)`
	`945`	`+ return IOMMU_DOMAIN_DMA;`
`944`	`946`
`945`	`947`	`return 0;`
`946`	`948`	`}`