PCI: rockchip: Add support for PCIe dma transfer function

Change-Id: Ie577d9816205c1e6d04ba666d68a6c7e57efa12d
Signed-off-by: Simon Xue <xxm@rock-chips.com>

drivers/pci/controller/Kconfig

@@ -233,6 +233,13 @@ config PCIE_ROCKCHIP_EP
 	  endpoint mode on Rockchip SoC. There is 1 internal PCIe port
 	  available to support GEN2 with 4 slots.
 
+config ROCKCHIP_PCIE_DMA_OBJ
+	bool "Rockchip PCIe uDMA transfer support"
+	depends on PCIE_ROCKCHIP_HOST || PCIE_DW_ROCKCHIP
+	default n
+	help
+	  Say y to enable p2p DMA transfer between PCIe components.
+
 config PCIE_MEDIATEK
 	tristate "MediaTek PCIe controller"
 	depends on ARCH_MEDIATEK || COMPILE_TEST

drivers/pci/controller/Makefile

@@ -26,6 +26,7 @@ obj-$(CONFIG_PCIE_ALTERA_MSI) += pcie-altera-msi.o
 obj-$(CONFIG_PCIE_ROCKCHIP) += pcie-rockchip.o
 obj-$(CONFIG_PCIE_ROCKCHIP_EP) += pcie-rockchip-ep.o
 obj-$(CONFIG_PCIE_ROCKCHIP_HOST) += pcie-rockchip-host.o
+obj-$(CONFIG_ROCKCHIP_PCIE_DMA_OBJ) += rockchip-pcie-dma.o
 obj-$(CONFIG_PCIE_MEDIATEK) += pcie-mediatek.o
 obj-$(CONFIG_PCIE_TANGO_SMP8759) += pcie-tango.o
 obj-$(CONFIG_VMD) += vmd.o

drivers/pci/controller/rockchip-pcie-dma.c

@@ -4,6 +4,7 @@
  */
 
 #include <linux/delay.h>
+#include <linux/dma-mapping.h>
 #include <linux/fs.h>
 #include <linux/gpio.h>
 #include <linux/init.h>