1 files changed, 0 insertions, 157 deletions

diff --git a/drivers/staging/media/tegra-vde/iommu.c b/drivers/staging/media/tegra-vde/iommu.c
deleted file mode 100644
index adf8dc7ee25c..000000000000
--- a/drivers/staging/media/tegra-vde/iommu.c
+++ /dev/null
@@ -1,157 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * NVIDIA Tegra Video decoder driver
- *
- * Copyright (C) 2016-2019 GRATE-DRIVER project
- */
-
-#include <linux/iommu.h>
-#include <linux/iova.h>
-#include <linux/kernel.h>
-#include <linux/platform_device.h>
-
-#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
-#include <asm/dma-iommu.h>
-#endif
-
-#include "vde.h"
-
-int tegra_vde_iommu_map(struct tegra_vde *vde,
-			struct sg_table *sgt,
-			struct iova **iovap,
-			size_t size)
-{
-	struct iova *iova;
-	unsigned long shift;
-	unsigned long end;
-	dma_addr_t addr;
-
-	end = vde->domain->geometry.aperture_end;
-	size = iova_align(&vde->iova, size);
-	shift = iova_shift(&vde->iova);
-
-	iova = alloc_iova(&vde->iova, size >> shift, end >> shift, true);
-	if (!iova)
-		return -ENOMEM;
-
-	addr = iova_dma_addr(&vde->iova, iova);
-
-	size = iommu_map_sgtable(vde->domain, addr, sgt,
-				 IOMMU_READ | IOMMU_WRITE);
-	if (!size) {
-		__free_iova(&vde->iova, iova);
-		return -ENXIO;
-	}
-
-	*iovap = iova;
-
-	return 0;
-}
-
-void tegra_vde_iommu_unmap(struct tegra_vde *vde, struct iova *iova)
-{
-	unsigned long shift = iova_shift(&vde->iova);
-	unsigned long size = iova_size(iova) << shift;
-	dma_addr_t addr = iova_dma_addr(&vde->iova, iova);
-
-	iommu_unmap(vde->domain, addr, size);
-	__free_iova(&vde->iova, iova);
-}
-
-int tegra_vde_iommu_init(struct tegra_vde *vde)
-{
-	struct device *dev = vde->miscdev.parent;
-	struct iova *iova;
-	unsigned long order;
-	unsigned long shift;
-	int err;
-
-	vde->group = iommu_group_get(dev);
-	if (!vde->group)
-		return 0;
-
-#if IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)
-	if (dev->archdata.mapping) {
-		struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
-
-		arm_iommu_detach_device(dev);
-		arm_iommu_release_mapping(mapping);
-	}
-#endif
-	vde->domain = iommu_domain_alloc(&platform_bus_type);
-	if (!vde->domain) {
-		err = -ENOMEM;
-		goto put_group;
-	}
-
-	err = iova_cache_get();
-	if (err)
-		goto free_domain;
-
-	order = __ffs(vde->domain->pgsize_bitmap);
-	init_iova_domain(&vde->iova, 1UL << order, 0);
-
-	err = iommu_attach_group(vde->domain, vde->group);
-	if (err)
-		goto put_iova;
-
-	/*
-	 * We're using some static addresses that are not accessible by VDE
-	 * to trap invalid memory accesses.
-	 */
-	shift = iova_shift(&vde->iova);
-	iova = reserve_iova(&vde->iova, 0x60000000 >> shift,
-			    0x70000000 >> shift);
-	if (!iova) {
-		err = -ENOMEM;
-		goto detach_group;
-	}
-
-	vde->iova_resv_static_addresses = iova;
-
-	/*
-	 * BSEV's end-address wraps around due to integer overflow during
-	 * of hardware context preparation if IOVA is allocated at the end
-	 * of address space and VDE can't handle that. Hence simply reserve
-	 * the last page to avoid the problem.
-	 */
-	iova = reserve_iova(&vde->iova, 0xffffffff >> shift,
-			    (0xffffffff >> shift) + 1);
-	if (!iova) {
-		err = -ENOMEM;
-		goto unreserve_iova;
-	}
-
-	vde->iova_resv_last_page = iova;
-
-	return 0;
-
-unreserve_iova:
-	__free_iova(&vde->iova, vde->iova_resv_static_addresses);
-detach_group:
-	iommu_detach_group(vde->domain, vde->group);
-put_iova:
-	put_iova_domain(&vde->iova);
-	iova_cache_put();
-free_domain:
-	iommu_domain_free(vde->domain);
-put_group:
-	iommu_group_put(vde->group);
-
-	return err;
-}
-
-void tegra_vde_iommu_deinit(struct tegra_vde *vde)
-{
-	if (vde->domain) {
-		__free_iova(&vde->iova, vde->iova_resv_last_page);
-		__free_iova(&vde->iova, vde->iova_resv_static_addresses);
-		iommu_detach_group(vde->domain, vde->group);
-		put_iova_domain(&vde->iova);
-		iova_cache_put();
-		iommu_domain_free(vde->domain);
-		iommu_group_put(vde->group);
-
-		vde->domain = NULL;
-	}
-}