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dma-debug: add support for resource mappings

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A MMIO mapped resource can not be represented by a struct page so a new
debug type is needed to handle this. This patch add such type and
functionality to add/remove entries and how to translate them to a
physical address.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
This commit is contained in:
Niklas Söderlund 2016-08-10 13:22:15 +02:00 • committed by Vinod Koul
parent ba409b31b3
commit 0e74b34dfc
2 changed files with 69 additions and 2 deletions
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19
include/linux/dma-debug.h
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@ -56,6 +56,13 @@ extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
extern void debug_dma_free_coherent(struct device *dev, size_t size,
void *virt, dma_addr_t addr);
extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
size_t size, int direction,
dma_addr_t dma_addr);
extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
size_t size, int direction);
extern void debug_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle, size_t size,
int direction);
@ -141,6 +148,18 @@ static inline void debug_dma_free_coherent(struct device *dev, size_t size,
{
}
static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
size_t size, int direction,
dma_addr_t dma_addr)
{
}
static inline void debug_dma_unmap_resource(struct device *dev,
dma_addr_t dma_addr, size_t size,
int direction)
{
}
static inline void debug_dma_sync_single_for_cpu(struct device *dev,
dma_addr_t dma_handle,
size_t size, int direction)