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iommu/tegra-smmu: Make use of domain_alloc and domain_free

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Implement domain_alloc and domain_free iommu-ops as a
replacement for domain_init/domain_destroy.

Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-03-26 13:43:12 +01:00
parent e1fd1eaa33
commit d5f1a81ccb
1 changed files with 23 additions and 18 deletions
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41
drivers/iommu/tegra-smmu.c
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@ -31,7 +31,7 @@ struct tegra_smmu {
};
struct tegra_smmu_as {
struct iommu_domain *domain;
struct iommu_domain domain;
struct tegra_smmu *smmu;
unsigned int use_count;
struct page *count;
@ -40,6 +40,11 @@ struct tegra_smmu_as {
u32 attr;
};
static struct tegra_smmu_as *to_smmu_as(struct iommu_domain *dom)
{
return container_of(dom, struct tegra_smmu_as, domain);
}
static inline void smmu_writel(struct tegra_smmu *smmu, u32 value,
unsigned long offset)
{
@ -224,30 +229,32 @@ static bool tegra_smmu_capable(enum iommu_cap cap)
return false;
}
static int tegra_smmu_domain_init(struct iommu_domain *domain)
static struct iommu_domain *tegra_smmu_domain_alloc(unsigned type)
{
struct tegra_smmu_as *as;
unsigned int i;
uint32_t *pd;
if (type != IOMMU_DOMAIN_UNMANAGED)
return NULL;
as = kzalloc(sizeof(*as), GFP_KERNEL);
if (!as)
return -ENOMEM;
return NULL;
as->attr = SMMU_PD_READABLE | SMMU_PD_WRITABLE | SMMU_PD_NONSECURE;
as->domain = domain;
as->pd = alloc_page(GFP_KERNEL | __GFP_DMA);
if (!as->pd) {
kfree(as);
return -ENOMEM;
return NULL;
}
as->count = alloc_page(GFP_KERNEL);
if (!as->count) {
__free_page(as->pd);
kfree(as);
return -ENOMEM;
return NULL;
}
/* clear PDEs */
@ -264,14 +271,12 @@ static int tegra_smmu_domain_init(struct iommu_domain *domain)
for (i = 0; i < SMMU_NUM_PDE; i++)
pd[i] = 0;
domain->priv = as;
return 0;
return &as->domain;
}
static void tegra_smmu_domain_destroy(struct iommu_domain *domain)
static void tegra_smmu_domain_free(struct iommu_domain *domain)
{
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
/* TODO: free page directory and page tables */
ClearPageReserved(as->pd);
@ -395,7 +400,7 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain,
struct device *dev)
{
struct tegra_smmu *smmu = dev->archdata.iommu;
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
struct device_node *np = dev->of_node;
struct of_phandle_args args;
unsigned int index = 0;
@ -428,7 +433,7 @@ static int tegra_smmu_attach_dev(struct iommu_domain *domain,
static void tegra_smmu_detach_dev(struct iommu_domain *domain, struct device *dev)
{
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
struct device_node *np = dev->of_node;
struct tegra_smmu *smmu = as->smmu;
struct of_phandle_args args;
@ -524,7 +529,7 @@ static void as_put_pte(struct tegra_smmu_as *as, dma_addr_t iova)
static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
phys_addr_t paddr, size_t size, int prot)
{
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
struct tegra_smmu *smmu = as->smmu;
unsigned long offset;
struct page *page;
@ -548,7 +553,7 @@ static int tegra_smmu_map(struct iommu_domain *domain, unsigned long iova,
static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
size_t size)
{
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
struct tegra_smmu *smmu = as->smmu;
unsigned long offset;
struct page *page;
@ -572,7 +577,7 @@ static size_t tegra_smmu_unmap(struct iommu_domain *domain, unsigned long iova,
static phys_addr_t tegra_smmu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
struct tegra_smmu_as *as = domain->priv;
struct tegra_smmu_as *as = to_smmu_as(domain);
struct page *page;
unsigned long pfn;
u32 *pte;
@ -633,8 +638,8 @@ static void tegra_smmu_remove_device(struct device *dev)
static const struct iommu_ops tegra_smmu_ops = {
.capable = tegra_smmu_capable,
.domain_init = tegra_smmu_domain_init,
.domain_destroy = tegra_smmu_domain_destroy,
.domain_alloc = tegra_smmu_domain_alloc,
.domain_free = tegra_smmu_domain_free,
.attach_dev = tegra_smmu_attach_dev,
.detach_dev = tegra_smmu_detach_dev,
.add_device = tegra_smmu_add_device,