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authorShunqian Zheng <zhengsq@rock-chips.com>2016-06-24 04:13:30 +0200
committerJoerg Roedel <jroedel@suse.de>2016-06-27 14:50:08 +0200
commita93db2f22b6b48369acb72f66a0ae47ec17a0b05 (patch)
tree0b1194799a7e15afa0f044517ff441548f6fad9e /drivers/iommu/rockchip-iommu.c
parentiommu/rockchip: Use DMA API to manage coherency (diff)
downloadlinux-a93db2f22b6b48369acb72f66a0ae47ec17a0b05.tar.xz
linux-a93db2f22b6b48369acb72f66a0ae47ec17a0b05.zip
iommu/rockchip: Prepare to support generic DMA mapping
Set geometry for allocated domains and fix .domain_alloc() callback to work with IOMMU_DOMAIN_DMA domain type, which is used for implicit domains on ARM64. Signed-off-by: Shunqian Zheng <zhengsq@rock-chips.com> Signed-off-by: Tomasz Figa <tfiga@chromium.org> Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/rockchip-iommu.c')
-rw-r--r--drivers/iommu/rockchip-iommu.c16
1 files changed, 11 insertions, 5 deletions
diff --git a/drivers/iommu/rockchip-iommu.c b/drivers/iommu/rockchip-iommu.c
index 712ed7591783..9afcbf79f0b0 100644
--- a/drivers/iommu/rockchip-iommu.c
+++ b/drivers/iommu/rockchip-iommu.c
@@ -889,7 +889,7 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
struct platform_device *pdev;
struct device *iommu_dev;
- if (type != IOMMU_DOMAIN_UNMANAGED)
+ if (type != IOMMU_DOMAIN_UNMANAGED && type != IOMMU_DOMAIN_DMA)
return NULL;
/* Register a pdev per domain, so DMA API can base on this *dev
@@ -906,8 +906,8 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
rk_domain->pdev = pdev;
- /* To init the iovad which is required by iommu_dma_init_domain() */
- if (iommu_get_dma_cookie(&rk_domain->domain))
+ if (type == IOMMU_DOMAIN_DMA &&
+ iommu_get_dma_cookie(&rk_domain->domain))
goto err_unreg_pdev;
/*
@@ -933,12 +933,17 @@ static struct iommu_domain *rk_iommu_domain_alloc(unsigned type)
spin_lock_init(&rk_domain->dt_lock);
INIT_LIST_HEAD(&rk_domain->iommus);
+ rk_domain->domain.geometry.aperture_start = 0;
+ rk_domain->domain.geometry.aperture_end = DMA_BIT_MASK(32);
+ rk_domain->domain.geometry.force_aperture = true;
+
return &rk_domain->domain;
err_free_dt:
free_page((unsigned long)rk_domain->dt);
err_put_cookie:
- iommu_put_dma_cookie(&rk_domain->domain);
+ if (type == IOMMU_DOMAIN_DMA)
+ iommu_put_dma_cookie(&rk_domain->domain);
err_unreg_pdev:
platform_device_unregister(pdev);
@@ -967,7 +972,8 @@ static void rk_iommu_domain_free(struct iommu_domain *domain)
SPAGE_SIZE, DMA_TO_DEVICE);
free_page((unsigned long)rk_domain->dt);
- iommu_put_dma_cookie(&rk_domain->domain);
+ if (domain->type == IOMMU_DOMAIN_DMA)
+ iommu_put_dma_cookie(&rk_domain->domain);
platform_device_unregister(rk_domain->pdev);
}