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>

1 files changed, 47 insertions, 40 deletions

diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index dc14fec4ede1..3e898504a7c4 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -200,6 +200,7 @@ struct exynos_iommu_domain {
         short *lv2entcnt; /* free lv2 entry counter for each section */
         spinlock_t lock; /* lock for this structure */
         spinlock_t pgtablelock; /* lock for modifying page table @ pgtable */
+        struct iommu_domain domain; /* generic domain data structure */
 };
 
 struct sysmmu_drvdata {
@@ -214,6 +215,11 @@ struct sysmmu_drvdata {
         phys_addr_t pgtable;
 };
 
+static struct exynos_iommu_domain *to_exynos_domain(struct iommu_domain *dom)
+{
+        return container_of(dom, struct exynos_iommu_domain, domain);
+}
+
 static bool set_sysmmu_active(struct sysmmu_drvdata *data)
 {
         /* return true if the System MMU was not active previously
@@ -696,58 +702,60 @@ static inline void pgtable_flush(void *vastart, void *vaend)
                                 virt_to_phys(vaend));
 }
 
-static int exynos_iommu_domain_init(struct iommu_domain *domain)
+static struct iommu_domain *exynos_iommu_domain_alloc(unsigned type)
 {
-        struct exynos_iommu_domain *priv;
+        struct exynos_iommu_domain *exynos_domain;
         int i;
 
-        priv = kzalloc(sizeof(*priv), GFP_KERNEL);
-        if (!priv)
-                return -ENOMEM;
+        if (type != IOMMU_DOMAIN_UNMANAGED)
+                return NULL;
+
+        exynos_domain = kzalloc(sizeof(*exynos_domain), GFP_KERNEL);
+        if (!exynos_domain)
+                return NULL;
 
-        priv->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
-        if (!priv->pgtable)
+        exynos_domain->pgtable = (sysmmu_pte_t *)__get_free_pages(GFP_KERNEL, 2);
+        if (!exynos_domain->pgtable)
                 goto err_pgtable;
 
-        priv->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
-        if (!priv->lv2entcnt)
+        exynos_domain->lv2entcnt = (short *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, 1);
+        if (!exynos_domain->lv2entcnt)
                 goto err_counter;
 
         /* Workaround for System MMU v3.3 to prevent caching 1MiB mapping */
         for (i = 0; i < NUM_LV1ENTRIES; i += 8) {
-                priv->pgtable[i + 0] = ZERO_LV2LINK;
-                priv->pgtable[i + 1] = ZERO_LV2LINK;
-                priv->pgtable[i + 2] = ZERO_LV2LINK;
-                priv->pgtable[i + 3] = ZERO_LV2LINK;
-                priv->pgtable[i + 4] = ZERO_LV2LINK;
-                priv->pgtable[i + 5] = ZERO_LV2LINK;
-                priv->pgtable[i + 6] = ZERO_LV2LINK;
-                priv->pgtable[i + 7] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 0] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 1] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 2] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 3] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 4] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 5] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 6] = ZERO_LV2LINK;
+                exynos_domain->pgtable[i + 7] = ZERO_LV2LINK;
         }
 
-        pgtable_flush(priv->pgtable, priv->pgtable + NUM_LV1ENTRIES);
+        pgtable_flush(exynos_domain->pgtable, exynos_domain->pgtable + NUM_LV1ENTRIES);
 
-        spin_lock_init(&priv->lock);
-        spin_lock_init(&priv->pgtablelock);
-        INIT_LIST_HEAD(&priv->clients);
+        spin_lock_init(&exynos_domain->lock);
+        spin_lock_init(&exynos_domain->pgtablelock);
+        INIT_LIST_HEAD(&exynos_domain->clients);
 
-        domain->geometry.aperture_start = 0;
-        domain->geometry.aperture_end   = ~0UL;
-        domain->geometry.force_aperture = true;
+        exynos_domain->domain.geometry.aperture_start = 0;
+        exynos_domain->domain.geometry.aperture_end   = ~0UL;
+        exynos_domain->domain.geometry.force_aperture = true;
 
-        domain->priv = priv;
-        return 0;
+        return &exynos_domain->domain;
 
 err_counter:
-        free_pages((unsigned long)priv->pgtable, 2);
+        free_pages((unsigned long)exynos_domain->pgtable, 2);
 err_pgtable:
-        kfree(priv);
-        return -ENOMEM;
+        kfree(exynos_domain);
+        return NULL;
 }
 
-static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
+static void exynos_iommu_domain_free(struct iommu_domain *domain)
 {
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         struct exynos_iommu_owner *owner;
         unsigned long flags;
         int i;
@@ -773,15 +781,14 @@ static void exynos_iommu_domain_destroy(struct iommu_domain *domain)
 
         free_pages((unsigned long)priv->pgtable, 2);
         free_pages((unsigned long)priv->lv2entcnt, 1);
-        kfree(domain->priv);
-        domain->priv = NULL;
+        kfree(priv);
 }
 
 static int exynos_iommu_attach_device(struct iommu_domain *domain,
                                    struct device *dev)
 {
         struct exynos_iommu_owner *owner = dev->archdata.iommu;
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         phys_addr_t pagetable = virt_to_phys(priv->pgtable);
         unsigned long flags;
         int ret;
@@ -812,7 +819,7 @@ static void exynos_iommu_detach_device(struct iommu_domain *domain,
                                     struct device *dev)
 {
         struct exynos_iommu_owner *owner;
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         phys_addr_t pagetable = virt_to_phys(priv->pgtable);
         unsigned long flags;
 
@@ -988,7 +995,7 @@ static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size,
 static int exynos_iommu_map(struct iommu_domain *domain, unsigned long l_iova,
                          phys_addr_t paddr, size_t size, int prot)
 {
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         sysmmu_pte_t *entry;
         sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
         unsigned long flags;
@@ -1042,7 +1049,7 @@ static void exynos_iommu_tlb_invalidate_entry(struct exynos_iommu_domain *priv,
 static size_t exynos_iommu_unmap(struct iommu_domain *domain,
                                         unsigned long l_iova, size_t size)
 {
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
         sysmmu_pte_t *ent;
         size_t err_pgsize;
@@ -1119,7 +1126,7 @@ err:
 static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain,
                                           dma_addr_t iova)
 {
-        struct exynos_iommu_domain *priv = domain->priv;
+        struct exynos_iommu_domain *priv = to_exynos_domain(domain);
         sysmmu_pte_t *entry;
         unsigned long flags;
         phys_addr_t phys = 0;
@@ -1171,8 +1178,8 @@ static void exynos_iommu_remove_device(struct device *dev)
 }
 
 static const struct iommu_ops exynos_iommu_ops = {
-        .domain_init = exynos_iommu_domain_init,
-        .domain_destroy = exynos_iommu_domain_destroy,
+        .domain_alloc = exynos_iommu_domain_alloc,
+        .domain_free = exynos_iommu_domain_free,
         .attach_dev = exynos_iommu_attach_device,
         .detach_dev = exynos_iommu_detach_device,
         .map = exynos_iommu_map,