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| author |   Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> | 2016-08-10 13:22:15 +0200 |
|---|---|---|
| committer |   Vinod Koul <vinod.koul@intel.com> | 2016-09-26 22:16:41 +0530 |
| commit | 0e74b34dfc3318bf4c7e51349d453d49fb8e9e16 (patch) | |
| tree | b70ed304ada0970420008f7131e043bc75c8ae6d /include/linux/dma-debug.h | |
| parent | dma-mapping: add {map,unmap}_resource to dma_map_ops (diff) | |
| download | wireguard-linux-0e74b34dfc3318bf4c7e51349d453d49fb8e9e16.tar.xz wireguard-linux-0e74b34dfc3318bf4c7e51349d453d49fb8e9e16.zip | |
dma-debug: add support for resource mappings
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>
Diffstat (limited to 'include/linux/dma-debug.h')
| -rw-r--r-- | include/linux/dma-debug.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/include/linux/dma-debug.h b/include/linux/dma-debug.h index fe8cb610deac..c7d844f09c3a 100644 --- a/include/linux/dma-debug.h +++ b/include/linux/dma-debug.h @@ -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) |