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-rw-r--r--include/linux/dma-mapping.h8
-rw-r--r--include/linux/swiotlb.h11
-rw-r--r--include/linux/virtio.h2
-rw-r--r--include/linux/virtio_config.h13
4 files changed, 34 insertions, 0 deletions
diff --git a/include/linux/dma-mapping.h b/include/linux/dma-mapping.h
index 70ad15758a70..75e60be91e5f 100644
--- a/include/linux/dma-mapping.h
+++ b/include/linux/dma-mapping.h
@@ -130,6 +130,7 @@ struct dma_map_ops {
enum dma_data_direction direction);
int (*dma_supported)(struct device *dev, u64 mask);
u64 (*get_required_mask)(struct device *dev);
+ size_t (*max_mapping_size)(struct device *dev);
};
#define DMA_MAPPING_ERROR (~(dma_addr_t)0)
@@ -259,6 +260,8 @@ static inline void dma_direct_sync_sg_for_cpu(struct device *dev,
}
#endif
+size_t dma_direct_max_mapping_size(struct device *dev);
+
#ifdef CONFIG_HAS_DMA
#include <asm/dma-mapping.h>
@@ -463,6 +466,7 @@ int dma_supported(struct device *dev, u64 mask);
int dma_set_mask(struct device *dev, u64 mask);
int dma_set_coherent_mask(struct device *dev, u64 mask);
u64 dma_get_required_mask(struct device *dev);
+size_t dma_max_mapping_size(struct device *dev);
#else /* CONFIG_HAS_DMA */
static inline dma_addr_t dma_map_page_attrs(struct device *dev,
struct page *page, size_t offset, size_t size,
@@ -564,6 +568,10 @@ static inline u64 dma_get_required_mask(struct device *dev)
{
return 0;
}
+static inline size_t dma_max_mapping_size(struct device *dev)
+{
+ return 0;
+}
#endif /* CONFIG_HAS_DMA */
static inline dma_addr_t dma_map_single_attrs(struct device *dev, void *ptr,
diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 54254388899e..361f62bb4a8e 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -73,6 +73,8 @@ bool swiotlb_map(struct device *dev, phys_addr_t *phys, dma_addr_t *dma_addr,
size_t size, enum dma_data_direction dir, unsigned long attrs);
void __init swiotlb_exit(void);
unsigned int swiotlb_max_segment(void);
+size_t swiotlb_max_mapping_size(struct device *dev);
+bool is_swiotlb_active(void);
#else
#define swiotlb_force SWIOTLB_NO_FORCE
static inline bool is_swiotlb_buffer(phys_addr_t paddr)
@@ -92,6 +94,15 @@ static inline unsigned int swiotlb_max_segment(void)
{
return 0;
}
+static inline size_t swiotlb_max_mapping_size(struct device *dev)
+{
+ return SIZE_MAX;
+}
+
+static inline bool is_swiotlb_active(void)
+{
+ return false;
+}
#endif /* CONFIG_SWIOTLB */
extern void swiotlb_print_info(void);
diff --git a/include/linux/virtio.h b/include/linux/virtio.h
index fa1b5da2804e..673fe3ef3607 100644
--- a/include/linux/virtio.h
+++ b/include/linux/virtio.h
@@ -157,6 +157,8 @@ int virtio_device_freeze(struct virtio_device *dev);
int virtio_device_restore(struct virtio_device *dev);
#endif
+size_t virtio_max_dma_size(struct virtio_device *vdev);
+
#define virtio_device_for_each_vq(vdev, vq) \
list_for_each_entry(vq, &vdev->vqs, list)
diff --git a/include/linux/virtio_config.h b/include/linux/virtio_config.h
index 987b6491b946..bb4cc4910750 100644
--- a/include/linux/virtio_config.h
+++ b/include/linux/virtio_config.h
@@ -290,6 +290,7 @@ static inline __virtio64 cpu_to_virtio64(struct virtio_device *vdev, u64 val)
/* Config space accessors. */
#define virtio_cread(vdev, structname, member, ptr) \
do { \
+ might_sleep(); \
/* Must match the member's type, and be integer */ \
if (!typecheck(typeof((((structname*)0)->member)), *(ptr))) \
(*ptr) = 1; \
@@ -319,6 +320,7 @@ static inline __virtio64 cpu_to_virtio64(struct virtio_device *vdev, u64 val)
/* Config space accessors. */
#define virtio_cwrite(vdev, structname, member, ptr) \
do { \
+ might_sleep(); \
/* Must match the member's type, and be integer */ \
if (!typecheck(typeof((((structname*)0)->member)), *(ptr))) \
BUG_ON((*ptr) == 1); \
@@ -358,6 +360,7 @@ static inline void __virtio_cread_many(struct virtio_device *vdev,
vdev->config->generation(vdev) : 0;
int i;
+ might_sleep();
do {
old = gen;
@@ -380,6 +383,8 @@ static inline void virtio_cread_bytes(struct virtio_device *vdev,
static inline u8 virtio_cread8(struct virtio_device *vdev, unsigned int offset)
{
u8 ret;
+
+ might_sleep();
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return ret;
}
@@ -387,6 +392,7 @@ static inline u8 virtio_cread8(struct virtio_device *vdev, unsigned int offset)
static inline void virtio_cwrite8(struct virtio_device *vdev,
unsigned int offset, u8 val)
{
+ might_sleep();
vdev->config->set(vdev, offset, &val, sizeof(val));
}
@@ -394,6 +400,8 @@ static inline u16 virtio_cread16(struct virtio_device *vdev,
unsigned int offset)
{
u16 ret;
+
+ might_sleep();
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return virtio16_to_cpu(vdev, (__force __virtio16)ret);
}
@@ -401,6 +409,7 @@ static inline u16 virtio_cread16(struct virtio_device *vdev,
static inline void virtio_cwrite16(struct virtio_device *vdev,
unsigned int offset, u16 val)
{
+ might_sleep();
val = (__force u16)cpu_to_virtio16(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}
@@ -409,6 +418,8 @@ static inline u32 virtio_cread32(struct virtio_device *vdev,
unsigned int offset)
{
u32 ret;
+
+ might_sleep();
vdev->config->get(vdev, offset, &ret, sizeof(ret));
return virtio32_to_cpu(vdev, (__force __virtio32)ret);
}
@@ -416,6 +427,7 @@ static inline u32 virtio_cread32(struct virtio_device *vdev,
static inline void virtio_cwrite32(struct virtio_device *vdev,
unsigned int offset, u32 val)
{
+ might_sleep();
val = (__force u32)cpu_to_virtio32(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}
@@ -431,6 +443,7 @@ static inline u64 virtio_cread64(struct virtio_device *vdev,
static inline void virtio_cwrite64(struct virtio_device *vdev,
unsigned int offset, u64 val)
{
+ might_sleep();
val = (__force u64)cpu_to_virtio64(vdev, val);
vdev->config->set(vdev, offset, &val, sizeof(val));
}