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-rw-r--r--arch/arm/include/asm/dma-iommu.h4
-rw-r--r--arch/arm/mm/dma-mapping.c43
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_drv.h2
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_iommu.c6
-rw-r--r--drivers/gpu/drm/exynos/exynos_drm_iommu.h1
-rw-r--r--drivers/iommu/shmobile-iommu.c2
6 files changed, 25 insertions, 33 deletions
diff --git a/arch/arm/include/asm/dma-iommu.h b/arch/arm/include/asm/dma-iommu.h
index 686797cf5618..eec0a12c5c1d 100644
--- a/arch/arm/include/asm/dma-iommu.h
+++ b/arch/arm/include/asm/dma-iommu.h
@@ -19,7 +19,6 @@ struct dma_iommu_mapping {
size_t bitmap_size; /* size of a single bitmap */
size_t bits; /* per bitmap */
unsigned int size; /* per bitmap */
- unsigned int order;
dma_addr_t base;
spinlock_t lock;
@@ -27,8 +26,7 @@ struct dma_iommu_mapping {
};
struct dma_iommu_mapping *
-arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
- int order);
+arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size);
void arm_iommu_release_mapping(struct dma_iommu_mapping *mapping);
diff --git a/arch/arm/mm/dma-mapping.c b/arch/arm/mm/dma-mapping.c
index 4d06295b8e3e..4fe42ce720d2 100644
--- a/arch/arm/mm/dma-mapping.c
+++ b/arch/arm/mm/dma-mapping.c
@@ -1084,11 +1084,8 @@ static inline dma_addr_t __alloc_iova(struct dma_iommu_mapping *mapping,
if (order > CONFIG_ARM_DMA_IOMMU_ALIGNMENT)
order = CONFIG_ARM_DMA_IOMMU_ALIGNMENT;
- count = ((PAGE_ALIGN(size) >> PAGE_SHIFT) +
- (1 << mapping->order) - 1) >> mapping->order;
-
- if (order > mapping->order)
- align = (1 << (order - mapping->order)) - 1;
+ count = PAGE_ALIGN(size) >> PAGE_SHIFT;
+ align = (1 << order) - 1;
spin_lock_irqsave(&mapping->lock, flags);
for (i = 0; i < mapping->nr_bitmaps; i++) {
@@ -1126,7 +1123,7 @@ static inline dma_addr_t __alloc_iova(struct dma_iommu_mapping *mapping,
spin_unlock_irqrestore(&mapping->lock, flags);
iova = mapping->base + (mapping->size * i);
- iova += start << (mapping->order + PAGE_SHIFT);
+ iova += start << PAGE_SHIFT;
return iova;
}
@@ -1147,7 +1144,7 @@ static inline void __free_iova(struct dma_iommu_mapping *mapping,
bitmap_base = mapping->base + mapping->size * bitmap_index;
- start = (addr - bitmap_base) >> (mapping->order + PAGE_SHIFT);
+ start = (addr - bitmap_base) >> PAGE_SHIFT;
if (addr + size > bitmap_base + mapping->size) {
/*
@@ -1158,8 +1155,7 @@ static inline void __free_iova(struct dma_iommu_mapping *mapping,
*/
BUG();
} else
- count = ((size >> PAGE_SHIFT) +
- (1 << mapping->order) - 1) >> mapping->order;
+ count = size >> PAGE_SHIFT;
spin_lock_irqsave(&mapping->lock, flags);
bitmap_clear(mapping->bitmaps[bitmap_index], start, count);
@@ -1927,8 +1923,7 @@ struct dma_map_ops iommu_coherent_ops = {
* arm_iommu_create_mapping
* @bus: pointer to the bus holding the client device (for IOMMU calls)
* @base: start address of the valid IO address space
- * @size: size of the valid IO address space
- * @order: accuracy of the IO addresses allocations
+ * @size: maximum size of the valid IO address space
*
* Creates a mapping structure which holds information about used/unused
* IO address ranges, which is required to perform memory allocation and
@@ -1938,37 +1933,41 @@ struct dma_map_ops iommu_coherent_ops = {
* arm_iommu_attach_device function.
*/
struct dma_iommu_mapping *
-arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size,
- int order)
+arm_iommu_create_mapping(struct bus_type *bus, dma_addr_t base, size_t size)
{
- unsigned int count = size >> (PAGE_SHIFT + order);
+ unsigned int bits = size >> PAGE_SHIFT;
+ unsigned int bitmap_size = BITS_TO_LONGS(bits) * sizeof(long);
struct dma_iommu_mapping *mapping;
- int extensions = 0;
+ int extensions = 1;
int err = -ENOMEM;
- if (!count)
+ if (!bitmap_size)
return ERR_PTR(-EINVAL);
+ if (bitmap_size > PAGE_SIZE) {
+ extensions = bitmap_size / PAGE_SIZE;
+ bitmap_size = PAGE_SIZE;
+ }
+
mapping = kzalloc(sizeof(struct dma_iommu_mapping), GFP_KERNEL);
if (!mapping)
goto err;
- mapping->bitmap_size = BITS_TO_LONGS(count) * sizeof(long);
- mapping->bitmaps = kzalloc((extensions + 1) * sizeof(unsigned long *),
+ mapping->bitmap_size = bitmap_size;
+ mapping->bitmaps = kzalloc(extensions * sizeof(unsigned long *),
GFP_KERNEL);
if (!mapping->bitmaps)
goto err2;
- mapping->bitmaps[0] = kzalloc(mapping->bitmap_size, GFP_KERNEL);
+ mapping->bitmaps[0] = kzalloc(bitmap_size, GFP_KERNEL);
if (!mapping->bitmaps[0])
goto err3;
mapping->nr_bitmaps = 1;
mapping->extensions = extensions;
mapping->base = base;
- mapping->size = size;
- mapping->order = order;
- mapping->bits = BITS_PER_BYTE * mapping->bitmap_size;
+ mapping->size = bitmap_size << PAGE_SHIFT;
+ mapping->bits = BITS_PER_BYTE * bitmap_size;
spin_lock_init(&mapping->lock);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h
index 0eaf5a27e120..a8f9dba2a816 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_drv.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h
@@ -237,7 +237,6 @@ struct drm_exynos_file_private {
* otherwise default one.
* @da_space_size: size of device address space.
* if 0 then default value is used for it.
- * @da_space_order: order to device address space.
*/
struct exynos_drm_private {
struct drm_fb_helper *fb_helper;
@@ -255,7 +254,6 @@ struct exynos_drm_private {
unsigned long da_start;
unsigned long da_space_size;
- unsigned long da_space_order;
};
/*
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.c b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
index fb8db0378274..b32b291f88ff 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_iommu.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.c
@@ -36,12 +36,10 @@ int drm_create_iommu_mapping(struct drm_device *drm_dev)
priv->da_start = EXYNOS_DEV_ADDR_START;
if (!priv->da_space_size)
priv->da_space_size = EXYNOS_DEV_ADDR_SIZE;
- if (!priv->da_space_order)
- priv->da_space_order = EXYNOS_DEV_ADDR_ORDER;
mapping = arm_iommu_create_mapping(&platform_bus_type, priv->da_start,
- priv->da_space_size,
- priv->da_space_order);
+ priv->da_space_size);
+
if (IS_ERR(mapping))
return PTR_ERR(mapping);
diff --git a/drivers/gpu/drm/exynos/exynos_drm_iommu.h b/drivers/gpu/drm/exynos/exynos_drm_iommu.h
index 598e60f57d4b..72376d41c512 100644
--- a/drivers/gpu/drm/exynos/exynos_drm_iommu.h
+++ b/drivers/gpu/drm/exynos/exynos_drm_iommu.h
@@ -14,7 +14,6 @@
#define EXYNOS_DEV_ADDR_START 0x20000000
#define EXYNOS_DEV_ADDR_SIZE 0x40000000
-#define EXYNOS_DEV_ADDR_ORDER 0x0
#ifdef CONFIG_DRM_EXYNOS_IOMMU
diff --git a/drivers/iommu/shmobile-iommu.c b/drivers/iommu/shmobile-iommu.c
index 7a3b928fad1c..464acda0bbc4 100644
--- a/drivers/iommu/shmobile-iommu.c
+++ b/drivers/iommu/shmobile-iommu.c
@@ -343,7 +343,7 @@ static int shmobile_iommu_add_device(struct device *dev)
mapping = archdata->iommu_mapping;
if (!mapping) {
mapping = arm_iommu_create_mapping(&platform_bus_type, 0,
- L1_LEN << 20, 0);
+ L1_LEN << 20);
if (IS_ERR(mapping))
return PTR_ERR(mapping);
archdata->iommu_mapping = mapping;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 18:20:35 +0000