/*
* kgsl_iommu_get_pt_base_addr - Get the address of the pagetable that the
* IOMMU ttbr0 register is programmed with
* @mmu - Pointer to mmu
* @pt - kgsl pagetable pointer that contains the IOMMU domain pointer
*
* Return - actual pagetable address that the ttbr0 register is programmed
* with
*/
static unsigned int kgsl_iommu_get_pt_base_addr(struct kgsl_mmu *mmu,
struct kgsl_pagetable *pt)
{
struct kgsl_iommu *iommu = mmu->priv;
struct kgsl_iommu_pt *iommu_pt = pt->priv;
return iommu_get_pt_base_addr(iommu_pt->domain) &
(iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_mask <<
iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_shift);
}
/*
* kgsl_iommu_pt_equal - Check if pagetables are equal
* @pt - Pointer to pagetable
* @pt_base - Address of a pagetable that the IOMMU register is
* programmed with
*
* Checks whether the pt_base is equal to the base address of
* the pagetable which is contained in the pt structure
* Return - Non-zero if the pagetable addresses are equal else 0
*/
static int kgsl_iommu_pt_equal(struct kgsl_pagetable *pt,
unsigned int pt_base)
{
struct kgsl_iommu_pt *iommu_pt = pt ? pt->priv : NULL;
unsigned int domain_ptbase = iommu_pt ?
iommu_get_pt_base_addr(iommu_pt->domain) : 0;
/* Only compare the valid address bits of the pt_base */
domain_ptbase &= (KGSL_IOMMU_TTBR0_PA_MASK <<
KGSL_IOMMU_TTBR0_PA_SHIFT);
pt_base &= (KGSL_IOMMU_TTBR0_PA_MASK <<
KGSL_IOMMU_TTBR0_PA_SHIFT);
return domain_ptbase && pt_base &&
(domain_ptbase == pt_base);
}
/*
* kgsl_iommu_pt_equal - Check if pagetables are equal
* @mmu - Pointer to mmu structure
* @pt - Pointer to pagetable
* @pt_base - Address of a pagetable that the IOMMU register is
* programmed with
*
* Checks whether the pt_base is equal to the base address of
* the pagetable which is contained in the pt structure
* Return - Non-zero if the pagetable addresses are equal else 0
*/
static int kgsl_iommu_pt_equal(struct kgsl_mmu *mmu,
struct kgsl_pagetable *pt,
unsigned int pt_base)
{
struct kgsl_iommu *iommu = mmu->priv;
struct kgsl_iommu_pt *iommu_pt = pt ? pt->priv : NULL;
unsigned int domain_ptbase = iommu_pt ?
iommu_get_pt_base_addr(iommu_pt->domain) : 0;
/* Only compare the valid address bits of the pt_base */
domain_ptbase &=
(iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_mask <<
iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_shift);
pt_base &=
(iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_mask <<
iommu->iommu_reg_list[KGSL_IOMMU_CTX_TTBR0].reg_shift);
return domain_ptbase && pt_base &&
(domain_ptbase == pt_base);
}
/*
* kgsl_iommu_pt_get_base_addr - Get the address of the pagetable that the
* IOMMU ttbr0 register is programmed with
* @pt - kgsl pagetable pointer that contains the IOMMU domain pointer
*
* Return - actual pagetable address that the ttbr0 register is programmed
* with
*/
static unsigned int kgsl_iommu_pt_get_base_addr(struct kgsl_pagetable *pt)
{
struct kgsl_iommu_pt *iommu_pt = pt->priv;
return iommu_get_pt_base_addr(iommu_pt->domain);
}
