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

Since we will have changed memory mapping of the IPMMU in the future,
This patch adds helper functions ipmmu_utlb_reg() and
ipmmu_imu{asid,ctr}_write() for "uTLB" 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 11:35:49 +09:00 committed by Joerg Roedel
parent 3dc28d9f59
commit 3667c9978b
1 changed files with 21 additions and 5 deletions
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26
drivers/iommu/ipmmu-vmsa.c
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@ -230,6 +230,23 @@ static void ipmmu_ctx_write_all(struct ipmmu_vmsa_domain *domain,
ipmmu_ctx_write(domain->mmu->root, domain->context_id, reg, data);
}
static u32 ipmmu_utlb_reg(struct ipmmu_vmsa_device *mmu, unsigned int reg)
{
return reg;
}
static void ipmmu_imuasid_write(struct ipmmu_vmsa_device *mmu,
unsigned int utlb, u32 data)
{
ipmmu_write(mmu, ipmmu_utlb_reg(mmu, IMUASID(utlb)), data);
}
static void ipmmu_imuctr_write(struct ipmmu_vmsa_device *mmu,
unsigned int utlb, u32 data)
{
ipmmu_write(mmu, ipmmu_utlb_reg(mmu, IMUCTR(utlb)), data);
}
/* -----------------------------------------------------------------------------
* TLB and microTLB Management
*/
@ -275,11 +292,10 @@ static void ipmmu_utlb_enable(struct ipmmu_vmsa_domain *domain,
*/
/* TODO: What should we set the ASID to ? */
ipmmu_write(mmu, IMUASID(utlb), 0);
ipmmu_imuasid_write(mmu, utlb, 0);
/* TODO: Do we need to flush the microTLB ? */
ipmmu_write(mmu, IMUCTR(utlb),
IMUCTR_TTSEL_MMU(domain->context_id) | IMUCTR_FLUSH |
IMUCTR_MMUEN);
ipmmu_imuctr_write(mmu, utlb, IMUCTR_TTSEL_MMU(domain->context_id) |
IMUCTR_FLUSH | IMUCTR_MMUEN);
mmu->utlb_ctx[utlb] = domain->context_id;
}
@ -291,7 +307,7 @@ static void ipmmu_utlb_disable(struct ipmmu_vmsa_domain *domain,
{
struct ipmmu_vmsa_device *mmu = domain->mmu;
ipmmu_write(mmu, IMUCTR(utlb), 0);
ipmmu_imuctr_write(mmu, utlb, 0);
mmu->utlb_ctx[utlb] = IPMMU_CTX_INVALID;
}