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iommu/ipmmu-vmsa: Add helper functions for MMU "context" registers

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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.uh@renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yoshihiro Shimoda 2019-11-06 11:35:47 +09:00 committed by Joerg Roedel
parent df9828aaa4
commit 16d9454f5e
1 changed files with 23 additions and 9 deletions
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32
drivers/iommu/ipmmu-vmsa.c
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@ -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 = {