On 04.08.2021 19:15, Robin Murphy wrote:
> The core code bakes its own cookies now.
>
> CC: Marek Szyprowski <m.szyprow...@samsung.com>
> Signed-off-by: Robin Murphy <robin.mur...@arm.com>
Acked-by: Marek Szyprowski <m.szyprow...@samsung.com>
Tested-by: Marek Szyprowski <m.szyprow...@samsung.com>
> ---
>
> v3: Also remove unneeded include
> ---
> drivers/iommu/exynos-iommu.c | 19 ++++---------------
> 1 file changed, 4 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
> index d0fbf1d10e18..939ffa768986 100644
> --- a/drivers/iommu/exynos-iommu.c
> +++ b/drivers/iommu/exynos-iommu.c
> @@ -21,7 +21,6 @@
> #include <linux/platform_device.h>
> #include <linux/pm_runtime.h>
> #include <linux/slab.h>
> -#include <linux/dma-iommu.h>
>
> typedef u32 sysmmu_iova_t;
> typedef u32 sysmmu_pte_t;
> @@ -735,20 +734,16 @@ static struct iommu_domain
> *exynos_iommu_domain_alloc(unsigned type)
> /* Check if correct PTE offsets are initialized */
> BUG_ON(PG_ENT_SHIFT < 0 || !dma_dev);
>
> + if (type != IOMMU_DOMAIN_DMA && type != IOMMU_DOMAIN_UNMANAGED)
> + return NULL;
> +
> domain = kzalloc(sizeof(*domain), GFP_KERNEL);
> if (!domain)
> return NULL;
>
> - if (type == IOMMU_DOMAIN_DMA) {
> - if (iommu_get_dma_cookie(&domain->domain) != 0)
> - goto err_pgtable;
> - } else if (type != IOMMU_DOMAIN_UNMANAGED) {
> - goto err_pgtable;
> - }
> -
> domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
> if (!domain->pgtable)
> - goto err_dma_cookie;
> + goto err_pgtable;
>
> domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO,
> 1);
> if (!domain->lv2entcnt)
> @@ -779,9 +774,6 @@ static struct iommu_domain
> *exynos_iommu_domain_alloc(unsigned type)
> free_pages((unsigned long)domain->lv2entcnt, 1);
> err_counter:
> free_pages((unsigned long)domain->pgtable, 2);
> -err_dma_cookie:
> - if (type == IOMMU_DOMAIN_DMA)
> - iommu_put_dma_cookie(&domain->domain);
> err_pgtable:
> kfree(domain);
> return NULL;
> @@ -809,9 +801,6 @@ static void exynos_iommu_domain_free(struct iommu_domain
> *iommu_domain)
>
> spin_unlock_irqrestore(&domain->lock, flags);
>
> - if (iommu_domain->type == IOMMU_DOMAIN_DMA)
> - iommu_put_dma_cookie(iommu_domain);
> -
> dma_unmap_single(dma_dev, virt_to_phys(domain->pgtable), LV1TABLE_SIZE,
> DMA_TO_DEVICE);
>
Best regards
--
Marek Szyprowski, PhD
Samsung R&D Institute Poland
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