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

Geert Uytterhoeven
2019-02-20T15:06:18Z

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>
---
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);
--
2.17.1