Re: [PATCH 12/21] iommu/mediatek: Add iova reserved function

[Pi-Hsun Shih]

On Sat, Jul 11, 2020 at 2:51 PM Yong Wu <yong.wu@xxxxxxxxxxxx> wrote:
>
> For multiple iommu_domains, we need to reserve some iova regions, so we
> will add mtk_iommu_iova_region structure. It includes the base address
> and size of the range.
> This is a preparing patch for supporting multi-domain.
>
> Signed-off-by: Anan sun<anan.sun@xxxxxxxxxxxx>
> Signed-off-by: Hao Chao<hao.chao@xxxxxxxxxxxx>
> Signed-off-by: Yong Wu <yong.wu@xxxxxxxxxxxx>
> ---
>  drivers/iommu/mtk_iommu.c | 37 +++++++++++++++++++++++++++++++++++++
>  drivers/iommu/mtk_iommu.h |  5 +++++
>  2 files changed, 42 insertions(+)
>
> diff --git a/drivers/iommu/mtk_iommu.c b/drivers/iommu/mtk_iommu.c
> index 03a6d66f4bef..fdfdb75706e0 100644
> --- a/drivers/iommu/mtk_iommu.c
> +++ b/drivers/iommu/mtk_iommu.c
> @@ -151,6 +151,11 @@ static LIST_HEAD(m4ulist); /* List all the M4U HWs */
> ...
> +
> +static void mtk_iommu_put_resv_regions(struct device *dev,
> +                                      struct list_head *head)
> +{
> +       struct iommu_resv_region *entry, *next;
> +
> +       list_for_each_entry_safe(entry, next, head, list)
> +               kfree(entry);
> +}
> +

This is the same as generic_iommu_put_resv_regions, use that as the
.put_resv_regions callback instead?

> ...
> --
> 2.18.0