diff mbox series

[v4,11/14] swiotlb: Add is_dev_swiotlb_force()

Message ID 20210209062131.2300005-12-tientzu@chromium.org (mailing list archive)
State New, archived
Headers show
Series Restricted DMA | expand

Commit Message

Claire Chang Feb. 9, 2021, 6:21 a.m. UTC 
Add is_dev_swiotlb_force() which returns true if the device has
restricted DMA pool (e.g. dev->dev_swiotlb is set).

Signed-off-by: Claire Chang <tientzu@chromium.org>
---
 include/linux/swiotlb.h | 9 +++++++++
 kernel/dma/swiotlb.c    | 5 +++++
 2 files changed, 14 insertions(+)
diff mbox series

Patch

diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
index 76f86c684524..b9f2a250c8da 100644
--- a/include/linux/swiotlb.h
+++ b/include/linux/swiotlb.h
@@ -73,11 +73,16 @@  extern enum swiotlb_force swiotlb_force;
 
 #ifdef CONFIG_DMA_RESTRICTED_POOL
 bool is_swiotlb_force(struct device *dev);
+bool is_dev_swiotlb_force(struct device *dev);
 #else
 static inline bool is_swiotlb_force(struct device *dev)
 {
 	return unlikely(swiotlb_force == SWIOTLB_FORCE);
 }
+static inline bool is_dev_swiotlb_force(struct device *dev)
+{
+	return false;
+}
 #endif /* CONFIG_DMA_RESTRICTED_POOL */
 
 bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr);
@@ -93,6 +98,10 @@  static inline bool is_swiotlb_force(struct device *dev)
 {
 	return false;
 }
+static inline bool is_dev_swiotlb_force(struct device *dev)
+{
+	return false;
+}
 static inline bool is_swiotlb_buffer(struct device *dev, phys_addr_t paddr)
 {
 	return false;
diff --git a/kernel/dma/swiotlb.c b/kernel/dma/swiotlb.c
index f64cbe6e84cc..fd9c1bd183ac 100644
--- a/kernel/dma/swiotlb.c
+++ b/kernel/dma/swiotlb.c
@@ -841,6 +841,11 @@  bool is_swiotlb_force(struct device *dev)
 	return unlikely(swiotlb_force == SWIOTLB_FORCE) || dev->dev_swiotlb;
 }
 
+bool is_dev_swiotlb_force(struct device *dev)
+{
+	return dev->dev_swiotlb;
+}
+
 static int rmem_swiotlb_device_init(struct reserved_mem *rmem,
 				    struct device *dev)
 {