iommu/exynos: Make use of domain_alloc and domain_free
Implement domain_alloc and domain_free iommu-ops as a replacement for domain_init/domain_destroy. Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel
Родитель
1d672638fc
Коммит
e1fd1eaa33
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@ -200,6 +200,7 @@ struct exynos_iommu_domain {
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short *lv2entcnt; /* free lv2 entry counter for each section */
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spinlock_t lock; /* lock for this structure */
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spinlock_t pgtablelock; /* lock for modifying page table @ pgtable */
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struct iommu_domain domain; /* generic domain data structure */
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};
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struct sysmmu_drvdata {
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@ -214,6 +215,11 @@ struct sysmmu_drvdata {
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phys_addr_t pgtable;
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};
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static struct exynos_iommu_domain *to_exynos_domain(struct iommu_domain *dom)
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{
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return container_of(dom, struct exynos_iommu_domain, domain);
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}
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static bool set_sysmmu_active(struct sysmmu_drvdata *data)
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{
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/* return true if the System MMU was not active previously
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@ -696,58 +702,60 @@ static inline void pgtable_flush(void *vastart, void *vaend)
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virt_to_phys(vaend));
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}
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static int exynos_iommu_domain_init(struct iommu_domain *domain)
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static struct iommu_domain *exynos_iommu_domain_alloc(unsigned type)
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{
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struct exynos_iommu_domain *priv;
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struct exynos_iommu_domain *exynos_domain;
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int i;
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priv = kzalloc(sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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if (type != IOMMU_DOMAIN_UNMANAGED)
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return NULL;
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priv->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
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if (!priv->pgtable)
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exynos_domain = kzalloc(sizeof(*exynos_domain), GFP_KERNEL);
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if (!exynos_domain)
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return NULL;
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exynos_domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
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if (!exynos_domain->pgtable)
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goto err_pgtable;
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priv->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
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if (!priv->lv2entcnt)
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exynos_domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
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if (!exynos_domain->lv2entcnt)
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goto err_counter;
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/* Workaround for System MMU v3.3 to prevent caching 1MiB mapping */
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for (i = 0; i < NUM_LV1ENTRIES; i += 8) {
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priv->pgtable[i + 0] = ZERO_LV2LINK;
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priv->pgtable[i + 1] = ZERO_LV2LINK;
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priv->pgtable[i + 2] = ZERO_LV2LINK;
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priv->pgtable[i + 3] = ZERO_LV2LINK;
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priv->pgtable[i + 4] = ZERO_LV2LINK;
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priv->pgtable[i + 5] = ZERO_LV2LINK;
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priv->pgtable[i + 6] = ZERO_LV2LINK;
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priv->pgtable[i + 7] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 0] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 1] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 2] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 3] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 4] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 5] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 6] = ZERO_LV2LINK;
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exynos_domain->pgtable[i + 7] = ZERO_LV2LINK;
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}
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pgtable_flush(priv->pgtable, priv->pgtable + NUM_LV1ENTRIES);
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pgtable_flush(exynos_domain->pgtable, exynos_domain->pgtable + NUM_LV1ENTRIES);
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spin_lock_init(&priv->lock);
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spin_lock_init(&priv->pgtablelock);
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INIT_LIST_HEAD(&priv->clients);
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spin_lock_init(&exynos_domain->lock);
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spin_lock_init(&exynos_domain->pgtablelock);
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INIT_LIST_HEAD(&exynos_domain->clients);
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domain->geometry.aperture_start = 0;
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domain->geometry.aperture_end = ~0UL;
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domain->geometry.force_aperture = true;
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exynos_domain->domain.geometry.aperture_start = 0;
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exynos_domain->domain.geometry.aperture_end = ~0UL;
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exynos_domain->domain.geometry.force_aperture = true;
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domain->priv = priv;
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return 0;
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return &exynos_domain->domain;
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err_counter:
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free_pages((unsigned long)priv->pgtable, 2);
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free_pages((unsigned long)exynos_domain->pgtable, 2);
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err_pgtable:
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kfree(priv);
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return -ENOMEM;
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kfree(exynos_domain);
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return NULL;
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}
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static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
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static void exynos_iommu_domain_free(struct iommu_domain *domain)
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{
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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struct exynos_iommu_owner *owner;
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unsigned long flags;
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int i;
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@ -773,15 +781,14 @@ static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
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free_pages((unsigned long)priv->pgtable, 2);
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free_pages((unsigned long)priv->lv2entcnt, 1);
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kfree(domain->priv);
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domain->priv = NULL;
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kfree(priv);
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}
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static int exynos_iommu_attach_device(struct iommu_domain *domain,
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struct device *dev)
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{
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struct exynos_iommu_owner *owner = dev->archdata.iommu;
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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phys_addr_t pagetable = virt_to_phys(priv->pgtable);
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unsigned long flags;
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int ret;
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@ -812,7 +819,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
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struct device *dev)
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{
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struct exynos_iommu_owner *owner;
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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phys_addr_t pagetable = virt_to_phys(priv->pgtable);
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unsigned long flags;
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@ -988,7 +995,7 @@ static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size,
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static int exynos_iommu_map(struct iommu_domain *domain, unsigned long l_iova,
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phys_addr_t paddr, size_t size, int prot)
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{
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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sysmmu_pte_t *entry;
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sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
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unsigned long flags;
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@ -1042,7 +1049,7 @@ static void exynos_iommu_tlb_invalidate_entry(struct exynos_iommu_domain *priv,
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static size_t exynos_iommu_unmap(struct iommu_domain *domain,
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unsigned long l_iova, size_t size)
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{
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
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sysmmu_pte_t *ent;
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size_t err_pgsize;
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@ -1119,7 +1126,7 @@ err:
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static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain,
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dma_addr_t iova)
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{
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struct exynos_iommu_domain *priv = domain->priv;
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struct exynos_iommu_domain *priv = to_exynos_domain(domain);
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sysmmu_pte_t *entry;
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unsigned long flags;
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phys_addr_t phys = 0;
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@ -1171,8 +1178,8 @@ static void exynos_iommu_remove_device(struct device *dev)
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}
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static const struct iommu_ops exynos_iommu_ops = {
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.domain_init = exynos_iommu_domain_init,
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.domain_destroy = exynos_iommu_domain_destroy,
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.domain_alloc = exynos_iommu_domain_alloc,
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.domain_free = exynos_iommu_domain_free,
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.attach_dev = exynos_iommu_attach_device,
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.detach_dev = exynos_iommu_detach_device,
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.map = exynos_iommu_map,
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