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    Subject[PATCH v5 06/16] swiotlb: Add a new get_io_tlb_mem getter
    Date
    Add a new getter, get_io_tlb_mem, to help select the io_tlb_mem struct.
    The restricted DMA pool is preferred if available.

    Signed-off-by: Claire Chang <tientzu@chromium.org>
    ---
    include/linux/swiotlb.h | 11 +++++++++++
    1 file changed, 11 insertions(+)

    diff --git a/include/linux/swiotlb.h b/include/linux/swiotlb.h
    index 03ad6e3b4056..b469f04cca26 100644
    --- a/include/linux/swiotlb.h
    +++ b/include/linux/swiotlb.h
    @@ -2,6 +2,7 @@
    #ifndef __LINUX_SWIOTLB_H
    #define __LINUX_SWIOTLB_H

    +#include <linux/device.h>
    #include <linux/dma-direction.h>
    #include <linux/init.h>
    #include <linux/types.h>
    @@ -102,6 +103,16 @@ struct io_tlb_mem {
    };
    extern struct io_tlb_mem *io_tlb_default_mem;

    +static inline struct io_tlb_mem *get_io_tlb_mem(struct device *dev)
    +{
    +#ifdef CONFIG_DMA_RESTRICTED_POOL
    + if (dev && dev->dma_io_tlb_mem)
    + return dev->dma_io_tlb_mem;
    +#endif /* CONFIG_DMA_RESTRICTED_POOL */
    +
    + return io_tlb_default_mem;
    +}
    +
    static inline bool is_swiotlb_buffer(phys_addr_t paddr)
    {
    struct io_tlb_mem *mem = io_tlb_default_mem;
    --
    2.31.1.368.gbe11c130af-goog
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