Merge tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

Pull 64-bit ARM SoC updates from Olof Johansson:
 "Changes to platform code for 64-bit ARM platforms.

  Nearly all of these are defconfig updates to enable new drivers or old
  drivers still used on these 64-bit platforms.

  Added platforms for this release are:

   - Broadcom BCM2837
   - Renesas R8A7796"

* tag 'armsoc-arm64' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (22 commits)
  arm64: remove duplicate PWM entry in defconfig
  arm64: Update default configuration
  arm64: defconfig: Enable more IP blocks for Exynos7 and Exynos5433
  arm64: amlogic: select gxbb clk driver
  arm64: defconfig: Enable S2MPS11 clock and S3C RTC driver
  arm64: marvell: enable Armada 3700 clock drivers
  arm64: defconfig: enable msm8996 pinctrl support
  arm64: defconfig: Enable qcom msm8996 clk drivers
  arm: defconfig: Enable PM8941 pwr key
  arm64: defconfig: enable stmmac and realtek PHY as modules
  arm64: Kconfig: select PM{,_GENERIC_DOMAINS} for ARCH_VEXPRESS
  arm64: defconfig: enable SENSORS_ARM_SCPI
  arm64: defconfig: enable Generic on-chip SRAM driver
  arm64: configs: enable PCIe driver for Armada 7K/8K
  arm64: Add platform selection for BCM2835.
  arm64: defconfig: disable plain NEON implementation of AES
  arm64: Allow for different DMA and CPU bus offsets
  arm64: defconfig: enable Renesas R8A7796 SoC
  arm64: defconfig: Enable Cadence MACB/GEM support
  ARM64: Kconfig: Select the Amlogic Meson pin controller driver
  ...

1 files changed, 15 insertions, 2 deletions

diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h
index 7dbea6c..ccea82c 100644
--- a/arch/arm64/include/asm/dma-mapping.h
+++ b/arch/arm64/include/asm/dma-mapping.h
@@ -66,12 +66,16 @@ static inline bool is_device_dma_coherent(struct device *dev)
 
 static inline dma_addr_t phys_to_dma(struct device *dev, phys_addr_t paddr)
 {
-	return (dma_addr_t)paddr;
+	dma_addr_t dev_addr = (dma_addr_t)paddr;
+
+	return dev_addr - ((dma_addr_t)dev->dma_pfn_offset << PAGE_SHIFT);
 }
 
 static inline phys_addr_t dma_to_phys(struct device *dev, dma_addr_t dev_addr)
 {
-	return (phys_addr_t)dev_addr;
+	phys_addr_t paddr = (phys_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)
@@ -86,5 +90,14 @@ static inline void dma_mark_clean(void *addr, size_t size)
 {
 }
 
+/* Override for dma_max_pfn() */
+static inline unsigned long dma_max_pfn(struct device *dev)
+{
+	dma_addr_t dma_max = (dma_addr_t)*dev->dma_mask;
+
+	return (ulong)dma_to_phys(dev, dma_max) >> PAGE_SHIFT;
+}
+#define dma_max_pfn(dev) dma_max_pfn(dev)
+
 #endif	/* __KERNEL__ */
 #endif	/* __ASM_DMA_MAPPING_H */