Hi Shimoda-san,
Thanks for your work,
On 2019-11-06 11:35:47 +0900, Yoshihiro Shimoda wrote:
> Since we will have changed memory mapping of the IPMMU in the future,
> This patch adds helper functions ipmmu_ctx_{reg,read,write}()
> for MMU "context" registers. 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 | 32 +++++++++++++++++++++++---------
> 1 file changed, 23 insertions(+), 9 deletions(-)
>
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index 79975e1..c4fcfda 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -190,29 +190,43 @@ static void ipmmu_write(struct ipmmu_vmsa_device *mmu,
> unsigned int offset,
> iowrite32(data, mmu->base + 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;
> +}
> +
> +static u32 ipmmu_ctx_read(struct ipmmu_vmsa_device *mmu,
> + unsigned int context_id, unsigned int reg)
> +{
> + return ipmmu_read(mmu, ipmmu_ctx_reg(mmu, context_id, reg));
> +}
> +
> +static void ipmmu_ctx_write(struct ipmmu_vmsa_device *mmu,
> + unsigned int context_id, unsigned int reg, u32 data)
> +{
> + ipmmu_write(mmu, ipmmu_ctx_reg(mmu, context_id, reg), data);
> +}
> +
> static u32 ipmmu_ctx_read_root(struct ipmmu_vmsa_domain *domain,
> unsigned int reg)
> {
> - return ipmmu_read(domain->mmu->root,
> - domain->context_id * IM_CTX_SIZE + reg);
> + return ipmmu_ctx_read(domain->mmu->root, domain->context_id, reg);
> }
>
> static void ipmmu_ctx_write_root(struct ipmmu_vmsa_domain *domain,
> unsigned int reg, u32 data)
> {
> - ipmmu_write(domain->mmu->root,
> - domain->context_id * IM_CTX_SIZE + reg, data);
> + ipmmu_ctx_write(domain->mmu->root, domain->context_id, reg, data);
> }
>
> static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,
> unsigned int reg, u32 data)
> {
> if (domain->mmu != domain->mmu->root)
> - ipmmu_write(domain->mmu,
> - domain->context_id * IM_CTX_SIZE + reg, data);
> + ipmmu_ctx_write(domain->mmu, domain->context_id, reg, data);
>
> - ipmmu_write(domain->mmu->root,
> - domain->context_id * IM_CTX_SIZE + reg, data);
> + ipmmu_ctx_write(domain->mmu->root, domain->context_id, reg, data);
> }
>
> /*
> -----------------------------------------------------------------------------
> @@ -913,7 +927,7 @@ static void ipmmu_device_reset(struct ipmmu_vmsa_device
> *mmu)
>
> /* Disable all contexts. */
> for (i = 0; i < mmu->num_ctx; ++i)
> - ipmmu_write(mmu, i * IM_CTX_SIZE + IMCTR, 0);
> + ipmmu_ctx_write(mmu, i, IMCTR, 0);
> }
>
> static const struct ipmmu_features ipmmu_features_default = {
> --
> 2.7.4
>
--
Regards,
Niklas Söderlund
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