Hi Shimoda-san,
Thanks for your patch,
On 2019-11-06 11:35:48 +0900, Yoshihiro Shimoda wrote:
> Since we will have changed memory mapping of the IPMMU in the future,
> this patch uses ipmmu_features values instead of a macro to
> calculate context registers offset. No behavior change.
>
> Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
> Reviewed-by: Geert Uytterhoeven <geert+rene...@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
> ---
> drivers/iommu/ipmmu-vmsa.c | 11 ++++++++---
> 1 file changed, 8 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index c4fcfda..8e2ca1c 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -50,6 +50,8 @@ struct ipmmu_features {
> bool twobit_imttbcr_sl0;
> bool reserved_context;
> bool cache_snoop;
> + unsigned int ctx_offset_base;
> + unsigned int ctx_offset_stride;
> };
>
> struct ipmmu_vmsa_device {
> @@ -99,8 +101,6 @@ static struct ipmmu_vmsa_device *to_ipmmu(struct device
> *dev)
>
> #define IM_NS_ALIAS_OFFSET 0x800
>
> -#define IM_CTX_SIZE 0x40
> -
> /* MMU "context" registers */
> #define IMCTR 0x0000 /* R-Car Gen2/3
> */
> #define IMCTR_INTEN (1 << 2) /* R-Car Gen2/3 */
> @@ -193,7 +193,8 @@ static void ipmmu_write(struct ipmmu_vmsa_device *mmu,
> unsigned int offset,
> static unsigned int ipmmu_ctx_reg(struct ipmmu_vmsa_device *mmu,
> unsigned int context_id, unsigned int reg)
> {
> - return context_id * IM_CTX_SIZE + reg;
> + return mmu->features->ctx_offset_base +
> + context_id * mmu->features->ctx_offset_stride + reg;
> }
>
> static u32 ipmmu_ctx_read(struct ipmmu_vmsa_device *mmu,
> @@ -939,6 +940,8 @@ static const struct ipmmu_features ipmmu_features_default
> = {
> .twobit_imttbcr_sl0 = false,
> .reserved_context = false,
> .cache_snoop = true,
> + .ctx_offset_base = 0,
> + .ctx_offset_stride = 0x40,
> };
>
> static const struct ipmmu_features ipmmu_features_rcar_gen3 = {
> @@ -950,6 +953,8 @@ static const struct ipmmu_features
> ipmmu_features_rcar_gen3 = {
> .twobit_imttbcr_sl0 = true,
> .reserved_context = true,
> .cache_snoop = false,
> + .ctx_offset_base = 0,
> + .ctx_offset_stride = 0x40,
> };
>
> static const struct of_device_id ipmmu_of_ids[] = {
> --
> 2.7.4
>
--
Regards,
Niklas Söderlund
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