drm/etnaviv: remove IOMMU dependency

Using the IOMMU API to manage the internal GPU MMU has been an
historical accident and it keeps getting in the way, as well as
entangling the driver with the inner workings of the IOMMU
subsystem.

Clean this up by removing the usage of iommu_domain, which is the
last piece linking etnaviv to the IOMMU subsystem.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>

1 files changed, 22 insertions, 6 deletions

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
index d072eda7a00d..ab603f5166b1 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
+++ b/drivers/gpu/drm/etnaviv/etnaviv_mmu.h
@@ -17,7 +17,8 @@
 #ifndef __ETNAVIV_MMU_H__
 #define __ETNAVIV_MMU_H__
 
-#include <linux/iommu.h>
+#define ETNAVIV_PROT_READ	(1 << 0)
+#define ETNAVIV_PROT_WRITE	(1 << 1)
 
 enum etnaviv_iommu_version {
 	ETNAVIV_IOMMU_V1 = 0,
@@ -26,16 +27,31 @@ enum etnaviv_iommu_version {
 
 struct etnaviv_gpu;
 struct etnaviv_vram_mapping;
+struct etnaviv_iommu_domain;
 
-struct etnaviv_iommu_ops {
-	struct iommu_ops ops;
-	size_t (*dump_size)(struct iommu_domain *);
-	void (*dump)(struct iommu_domain *, void *);
+struct etnaviv_iommu_domain_ops {
+	void (*free)(struct etnaviv_iommu_domain *);
+	int (*map)(struct etnaviv_iommu_domain *domain, unsigned long iova,
+		   phys_addr_t paddr, size_t size, int prot);
+	size_t (*unmap)(struct etnaviv_iommu_domain *domain, unsigned long iova,
+			size_t size);
+	size_t (*dump_size)(struct etnaviv_iommu_domain *);
+	void (*dump)(struct etnaviv_iommu_domain *, void *);
+};
+
+struct etnaviv_iommu_domain {
+	struct device *dev;
+	void *bad_page_cpu;
+	dma_addr_t bad_page_dma;
+	u64 base;
+	u64 size;
+
+	const struct etnaviv_iommu_domain_ops *ops;
 };
 
 struct etnaviv_iommu {
 	struct etnaviv_gpu *gpu;
-	struct iommu_domain *domain;
+	struct etnaviv_iommu_domain *domain;
 
 	enum etnaviv_iommu_version version;