[PATCH v13 13/19] iommu/exynos: use exynos-iommu specific typedef
From: Shaik Ameer Basha
Date: Mon May 12 2014 - 02:19:15 EST
From: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
This commit introduces sysmmu_pte_t for page table entries and
sysmmu_iova_t vor I/O virtual address that is manipulated by
exynos-iommu driver. The purpose of the typedef is to remove
dependencies to the driver code from the change of CPU architecture
from 32 bit to 64 bit.
Signed-off-by: Cho KyongHo <pullip.cho@xxxxxxxxxxx>
Signed-off-by: Shaik Ameer Basha <shaik.ameer@xxxxxxxxxxx>
---
drivers/iommu/exynos-iommu.c | 101 ++++++++++++++++++++++++------------------
1 file changed, 59 insertions(+), 42 deletions(-)
diff --git a/drivers/iommu/exynos-iommu.c b/drivers/iommu/exynos-iommu.c
index d89ad5f..3291619 100644
--- a/drivers/iommu/exynos-iommu.c
+++ b/drivers/iommu/exynos-iommu.c
@@ -29,6 +29,9 @@
#include <asm/cacheflush.h>
#include <asm/pgtable.h>
+typedef u32 sysmmu_iova_t;
+typedef u32 sysmmu_pte_t;
+
/* We does not consider super section mapping (16MB) */
#define SECT_ORDER 20
#define LPAGE_ORDER 16
@@ -50,20 +53,32 @@
#define lv2ent_small(pent) ((*(pent) & 2) == 2)
#define lv2ent_large(pent) ((*(pent) & 3) == 1)
+static u32 sysmmu_page_offset(sysmmu_iova_t iova, u32 size)
+{
+ return iova & (size - 1);
+}
+
#define section_phys(sent) (*(sent) & SECT_MASK)
-#define section_offs(iova) ((iova) & 0xFFFFF)
+#define section_offs(iova) sysmmu_page_offset((iova), SECT_SIZE)
#define lpage_phys(pent) (*(pent) & LPAGE_MASK)
-#define lpage_offs(iova) ((iova) & 0xFFFF)
+#define lpage_offs(iova) sysmmu_page_offset((iova), LPAGE_SIZE)
#define spage_phys(pent) (*(pent) & SPAGE_MASK)
-#define spage_offs(iova) ((iova) & 0xFFF)
-
-#define lv1ent_offset(iova) ((iova) >> SECT_ORDER)
-#define lv2ent_offset(iova) (((iova) & 0xFF000) >> SPAGE_ORDER)
+#define spage_offs(iova) sysmmu_page_offset((iova), SPAGE_SIZE)
#define NUM_LV1ENTRIES 4096
-#define NUM_LV2ENTRIES 256
+#define NUM_LV2ENTRIES (SECT_SIZE / SPAGE_SIZE)
-#define LV2TABLE_SIZE (NUM_LV2ENTRIES * sizeof(long))
+static u32 lv1ent_offset(sysmmu_iova_t iova)
+{
+ return iova >> SECT_ORDER;
+}
+
+static u32 lv2ent_offset(sysmmu_iova_t iova)
+{
+ return (iova >> SPAGE_ORDER) & (NUM_LV2ENTRIES - 1);
+}
+
+#define LV2TABLE_SIZE (NUM_LV2ENTRIES * sizeof(sysmmu_pte_t))
#define SPAGES_PER_LPAGE (LPAGE_SIZE / SPAGE_SIZE)
@@ -101,14 +116,14 @@
static struct kmem_cache *lv2table_kmem_cache;
-static unsigned long *section_entry(unsigned long *pgtable, unsigned long iova)
+static sysmmu_pte_t *section_entry(sysmmu_pte_t *pgtable, sysmmu_iova_t iova)
{
return pgtable + lv1ent_offset(iova);
}
-static unsigned long *page_entry(unsigned long *sent, unsigned long iova)
+static sysmmu_pte_t *page_entry(sysmmu_pte_t *sent, sysmmu_iova_t iova)
{
- return (unsigned long *)phys_to_virt(
+ return (sysmmu_pte_t *)phys_to_virt(
lv2table_base(sent)) + lv2ent_offset(iova);
}
@@ -150,7 +165,7 @@ static char *sysmmu_fault_name[SYSMMU_FAULTS_NUM] = {
struct exynos_iommu_domain {
struct list_head clients; /* list of sysmmu_drvdata.node */
- unsigned long *pgtable; /* lv1 page table, 16KB */
+ sysmmu_pte_t *pgtable; /* lv1 page table, 16KB */
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 */
@@ -215,7 +230,7 @@ static void __sysmmu_tlb_invalidate(void __iomem *sfrbase)
}
static void __sysmmu_tlb_invalidate_entry(void __iomem *sfrbase,
- unsigned long iova, unsigned int num_inv)
+ sysmmu_iova_t iova, unsigned int num_inv)
{
unsigned int i;
for (i = 0; i < num_inv; i++) {
@@ -226,7 +241,7 @@ static void __sysmmu_tlb_invalidate_entry(void __iomem *sfrbase,
}
static void __sysmmu_set_ptbase(void __iomem *sfrbase,
- unsigned long pgd)
+ phys_addr_t pgd)
{
__raw_writel(0x1, sfrbase + REG_MMU_CFG); /* 16KB LV1, LRU */
__raw_writel(pgd, sfrbase + REG_PT_BASE_ADDR);
@@ -236,22 +251,22 @@ static void __sysmmu_set_ptbase(void __iomem *sfrbase,
static void show_fault_information(const char *name,
enum exynos_sysmmu_inttype itype,
- phys_addr_t pgtable_base, unsigned long fault_addr)
+ phys_addr_t pgtable_base, sysmmu_iova_t fault_addr)
{
- unsigned long *ent;
+ sysmmu_pte_t *ent;
if ((itype >= SYSMMU_FAULTS_NUM) || (itype < SYSMMU_PAGEFAULT))
itype = SYSMMU_FAULT_UNKNOWN;
- pr_err("%s occurred at %#lx by %s(Page table base: %pa)\n",
+ pr_err("%s occurred at %#x by %s(Page table base: %pa)\n",
sysmmu_fault_name[itype], fault_addr, name, &pgtable_base);
ent = section_entry(phys_to_virt(pgtable_base), fault_addr);
- pr_err("\tLv1 entry: 0x%lx\n", *ent);
+ pr_err("\tLv1 entry: %#x\n", *ent);
if (lv1ent_page(ent)) {
ent = page_entry(ent, fault_addr);
- pr_err("\t Lv2 entry: 0x%lx\n", *ent);
+ pr_err("\t Lv2 entry: %#x\n", *ent);
}
}
@@ -260,7 +275,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id)
/* SYSMMU is in blocked when interrupt occurred. */
struct sysmmu_drvdata *data = dev_id;
enum exynos_sysmmu_inttype itype;
- unsigned long addr = -1;
+ sysmmu_iova_t addr = -1;
int ret = -ENOSYS;
WARN_ON(!is_sysmmu_active(data));
@@ -284,7 +299,7 @@ static irqreturn_t exynos_sysmmu_irq(int irq, void *dev_id)
__func__);
BUG();
} else {
- unsigned long base =
+ unsigned int base =
__raw_readl(data->sfrbase + REG_PT_BASE_ADDR);
show_fault_information(dev_name(data->sysmmu),
itype, base, addr);
@@ -349,7 +364,7 @@ finish:
* enabled before.
*/
static int __exynos_sysmmu_enable(struct sysmmu_drvdata *data,
- unsigned long pgtable, struct iommu_domain *domain)
+ phys_addr_t pgtable, struct iommu_domain *domain)
{
int ret = 0;
unsigned long flags;
@@ -390,7 +405,7 @@ finish:
return ret;
}
-int exynos_sysmmu_enable(struct device *dev, unsigned long pgtable)
+int exynos_sysmmu_enable(struct device *dev, phys_addr_t pgtable)
{
struct sysmmu_drvdata *data = dev_get_drvdata(dev->archdata.iommu);
int ret;
@@ -426,7 +441,7 @@ static bool exynos_sysmmu_disable(struct device *dev)
return disabled;
}
-static void sysmmu_tlb_invalidate_entry(struct device *dev, unsigned long iova,
+static void sysmmu_tlb_invalidate_entry(struct device *dev, sysmmu_iova_t iova,
size_t size)
{
unsigned long flags;
@@ -577,7 +592,7 @@ static int exynos_iommu_domain_init(struct iommu_domain *domain)
if (!priv)
return -ENOMEM;
- priv->pgtable = (unsigned long *)__get_free_pages(
+ priv->pgtable = (sysmmu_pte_t *)__get_free_pages(
GFP_KERNEL | __GFP_ZERO, 2);
if (!priv->pgtable)
goto err_pgtable;
@@ -716,19 +731,19 @@ finish:
pm_runtime_put(data->sysmmu);
}
-static unsigned long *alloc_lv2entry(unsigned long *sent, unsigned long iova,
+static sysmmu_pte_t *alloc_lv2entry(sysmmu_pte_t *sent, sysmmu_iova_t iova,
short *pgcounter)
{
if (lv1ent_section(sent)) {
- WARN(1, "Trying mapping on %#08lx mapped with 1MiB page", iova);
+ WARN(1, "Trying mapping on %#08x mapped with 1MiB page", iova);
return ERR_PTR(-EADDRINUSE);
}
if (lv1ent_fault(sent)) {
- unsigned long *pent;
+ sysmmu_pte_t *pent;
pent = kmem_cache_zalloc(lv2table_kmem_cache, GFP_ATOMIC);
- BUG_ON((unsigned long)pent & (LV2TABLE_SIZE - 1));
+ BUG_ON((unsigned int)pent & (LV2TABLE_SIZE - 1));
if (!pent)
return ERR_PTR(-ENOMEM);
@@ -741,18 +756,18 @@ static unsigned long *alloc_lv2entry(unsigned long *sent, unsigned long iova,
return page_entry(sent, iova);
}
-static int lv1set_section(unsigned long *sent, unsigned long iova,
+static int lv1set_section(sysmmu_pte_t *sent, sysmmu_iova_t iova,
phys_addr_t paddr, short *pgcnt)
{
if (lv1ent_section(sent)) {
- WARN(1, "Trying mapping on 1MiB@%#08lx that is mapped",
+ WARN(1, "Trying mapping on 1MiB@%#08x that is mapped",
iova);
return -EADDRINUSE;
}
if (lv1ent_page(sent)) {
if (*pgcnt != NUM_LV2ENTRIES) {
- WARN(1, "Trying mapping on 1MiB@%#08lx that is mapped",
+ WARN(1, "Trying mapping on 1MiB@%#08x that is mapped",
iova);
return -EADDRINUSE;
}
@@ -768,7 +783,7 @@ static int lv1set_section(unsigned long *sent, unsigned long iova,
return 0;
}
-static int lv2set_page(unsigned long *pent, phys_addr_t paddr, size_t size,
+static int lv2set_page(sysmmu_pte_t *pent, phys_addr_t paddr, size_t size,
short *pgcnt)
{
if (size == SPAGE_SIZE) {
@@ -800,11 +815,12 @@ static int lv2set_page(unsigned long *pent, phys_addr_t paddr, size_t size,
return 0;
}
-static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova,
+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;
- unsigned long *entry;
+ sysmmu_pte_t *entry;
+ sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
unsigned long flags;
int ret = -ENOMEM;
@@ -818,7 +834,7 @@ static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova,
ret = lv1set_section(entry, iova, paddr,
&priv->lv2entcnt[lv1ent_offset(iova)]);
} else {
- unsigned long *pent;
+ sysmmu_pte_t *pent;
pent = alloc_lv2entry(entry, iova,
&priv->lv2entcnt[lv1ent_offset(iova)]);
@@ -831,7 +847,7 @@ static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova,
}
if (ret)
- pr_debug("%s: Failed to map iova 0x%lx/0x%x bytes\n",
+ pr_debug("%s: Failed to map iova %#x/%#zx bytes\n",
__func__, iova, size);
spin_unlock_irqrestore(&priv->pgtablelock, flags);
@@ -840,13 +856,14 @@ static int exynos_iommu_map(struct iommu_domain *domain, unsigned long iova,
}
static size_t exynos_iommu_unmap(struct iommu_domain *domain,
- unsigned long iova, size_t size)
+ unsigned long l_iova, size_t size)
{
struct exynos_iommu_domain *priv = domain->priv;
struct sysmmu_drvdata *data;
- unsigned long flags;
- unsigned long *ent;
+ sysmmu_iova_t iova = (sysmmu_iova_t)l_iova;
+ sysmmu_pte_t *ent;
size_t err_pgsize;
+ unsigned long flags;
BUG_ON(priv->pgtable == NULL);
@@ -913,7 +930,7 @@ err:
spin_unlock_irqrestore(&priv->pgtablelock, flags);
WARN(1,
- "%s: Failed due to size(%#x) @ %#08lx is smaller than page size %#x\n",
+ "%s: Failed due to size(%#zx) @ %#x is smaller than page size %#zx\n",
__func__, size, iova, err_pgsize);
return 0;
@@ -923,7 +940,7 @@ static phys_addr_t exynos_iommu_iova_to_phys(struct iommu_domain *domain,
dma_addr_t iova)
{
struct exynos_iommu_domain *priv = domain->priv;
- unsigned long *entry;
+ sysmmu_pte_t *entry;
unsigned long flags;
phys_addr_t phys = 0;
--
1.7.9.5
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