Merge tag '5.5-rc-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6

[linux.git] / include / linux / dma-direct.h

diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index d03af3605460fef629801df5f91df0e6d4d8b242..24b8684aa21d6083c8cf31136479045bc834c2aa 100644 (file)
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -3,6 +3,7 @@
 #define _LINUX_DMA_DIRECT_H 1
 
 #include <linux/dma-mapping.h>
+#include <linux/memblock.h> /* for min_low_pfn */
 #include <linux/mem_encrypt.h>
 
 extern unsigned int zone_dma_bits;
@@ -23,15 +24,6 @@ static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
 
        return paddr + ((phys_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
 }
-
-static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
-{
-       if (!dev->dma_mask)
-               return false;
-
-       return addr + size - 1 <=
-               min_not_zero(*dev->dma_mask, dev->bus_dma_mask);
-}
 #endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */
 
 #ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
@@ -59,6 +51,21 @@ static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t daddr)
        return __sme_clr(__dma_to_phys(dev, daddr));
 }
 
+static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size,
+               bool is_ram)
+{
+       dma_addr_t end = addr + size - 1;
+
+       if (!dev->dma_mask)
+               return false;
+
+       if (is_ram && !IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT) &&
+           min(addr, end) < phys_to_dma(dev, PFN_PHYS(min_low_pfn)))
+               return false;
+
+       return end <= min_not_zero(*dev->dma_mask, dev->bus_dma_limit);
+}
+
 u64 dma_direct_get_required_mask(struct device *dev);
 void *dma_direct_alloc(struct device *dev, size_t size, dma_addr_t *dma_handle,
                gfp_t gfp, unsigned long attrs);
@@ -69,7 +76,13 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
 void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
                dma_addr_t dma_addr, unsigned long attrs);
 struct page *__dma_direct_alloc_pages(struct device *dev, size_t size,
-               dma_addr_t *dma_handle, gfp_t gfp, unsigned long attrs);
-void __dma_direct_free_pages(struct device *dev, size_t size, struct page *page);
+               gfp_t gfp, unsigned long attrs);
+int dma_direct_get_sgtable(struct device *dev, struct sg_table *sgt,
+               void *cpu_addr, dma_addr_t dma_addr, size_t size,
+               unsigned long attrs);
+bool dma_direct_can_mmap(struct device *dev);
+int dma_direct_mmap(struct device *dev, struct vm_area_struct *vma,
+               void *cpu_addr, dma_addr_t dma_addr, size_t size,
+               unsigned long attrs);
 int dma_direct_supported(struct device *dev, u64 mask);
 #endif /* _LINUX_DMA_DIRECT_H */