Re: [PATCH 5/7] iommu/ipmmu-vmsa: Move num_utlbs to SoC-specific features

Laurent Pinchart
2019-02-20T15:42:53Z

Hi Geert,

Thank you for the patch.

On Wed, Feb 20, 2019 at 04:05:29PM +0100, Geert Uytterhoeven wrote:
> The maximum number of micro-TLBs per IPMMU instance is not fixed, but
> depends on the SoC type. Hence move it from struct ipmmu_vmsa_device to
> struct ipmmu_features, and set up the correct value for both R-Car Gen2
> and Gen3 SoCs.
>
> Note that currently no code uses this value.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> ---
> drivers/iommu/ipmmu-vmsa.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
> index 4e3134a9a52f8d87..0a21e734466eb1bd 100644
> --- a/drivers/iommu/ipmmu-vmsa.c
> +++ b/drivers/iommu/ipmmu-vmsa.c
> @@ -42,6 +42,7 @@ struct ipmmu_features {
> bool use_ns_alias_offset;
> bool has_cache_leaf_nodes;
> unsigned int number_of_contexts;
> + unsigned int num_utlbs;
> bool setup_imbuscr;
> bool twobit_imttbcr_sl0;
> bool reserved_context;
> @@ -53,7 +54,6 @@ struct ipmmu_vmsa_device {
> struct iommu_device iommu;
> struct ipmmu_vmsa_device *root;
> const struct ipmmu_features *features;
> - unsigned int num_utlbs;
> unsigned int num_ctx;
> spinlock_t lock; /* Protects ctx and domains[] */
> DECLARE_BITMAP(ctx, IPMMU_CTX_MAX);
> @@ -972,6 +972,7 @@ static const struct ipmmu_features ipmmu_features_default = {
> .use_ns_alias_offset = true,
> .has_cache_leaf_nodes = false,
> .number_of_contexts = 1, /* software only tested with one context */
> + .num_utlbs = 32,
> .setup_imbuscr = true,
> .twobit_imttbcr_sl0 = false,
> .reserved_context = false,
> @@ -981,6 +982,7 @@ static const struct ipmmu_features ipmmu_features_rcar_gen3 = {
> .use_ns_alias_offset = false,
> .has_cache_leaf_nodes = true,
> .number_of_contexts = 8,
> + .num_utlbs = 48,
> .setup_imbuscr = false,
> .twobit_imttbcr_sl0 = true,
> .reserved_context = true,
> @@ -1033,7 +1035,6 @@ static int ipmmu_probe(struct platform_device *pdev)
> }
>
> mmu->dev = &pdev->dev;
> - mmu->num_utlbs = 48;
> spin_lock_init(&mmu->lock);
> bitmap_zero(mmu->ctx, IPMMU_CTX_MAX);
> mmu->features = of_device_get_match_data(&pdev->dev);

--
Regards,

Laurent Pinchart