[PATCH 2/3] iommu/ipmmu-vmsa: Calculate context registers' offset instead of a macro
Yoshihiro Shimoda
yoshihiro.shimoda.uh at renesas.com
Wed Oct 9 08:26:48 UTC 2019
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.uh at renesas.com>
---
drivers/iommu/ipmmu-vmsa.c | 27 +++++++++++++++++++--------
1 file changed, 19 insertions(+), 8 deletions(-)
diff --git a/drivers/iommu/ipmmu-vmsa.c b/drivers/iommu/ipmmu-vmsa.c
index dd554c2..76fb250 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;
+ u32 ctx_offset_base;
+ u32 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
-
#define IMCTR 0x0000
#define IMCTR_TRE (1 << 17)
#define IMCTR_AFE (1 << 16)
@@ -253,18 +253,25 @@ static void ipmmu_write(struct ipmmu_vmsa_device *mmu, unsigned int offset,
iowrite32(data, mmu->base + offset);
}
+static u32 ipmmu_ctx_reg(struct ipmmu_vmsa_device *mmu, unsigned int context_id,
+ unsigned int reg)
+{
+ return mmu->features->ctx_offset_base +
+ context_id * mmu->features->ctx_offset_stride + reg;
+}
+
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);
+ ipmmu_ctx_reg(domain->mmu, 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_reg(domain->mmu, domain->context_id, reg), data);
}
static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,
@@ -272,10 +279,10 @@ static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,
{
if (domain->mmu != domain->mmu->root)
ipmmu_write(domain->mmu,
- domain->context_id * IM_CTX_SIZE + reg, data);
+ ipmmu_ctx_reg(domain->mmu, domain->context_id, reg),
+ data);
- ipmmu_write(domain->mmu->root,
- domain->context_id * IM_CTX_SIZE + reg, data);
+ ipmmu_ctx_write_root(domain, reg, data);
}
/* -----------------------------------------------------------------------------
@@ -974,7 +981,7 @@ 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_write(mmu, ipmmu_ctx_reg(mmu, i, IMCTR), 0);
}
static const struct ipmmu_features ipmmu_features_default = {
@@ -986,6 +993,8 @@ 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 = {
@@ -997,6 +1006,8 @@ 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
More information about the iommu
mailing list