nvdla: Support compilation as module

Signed-off-by: Emil Renner Berthing <[email protected]>

drivers/nvdla/Kconfig

@@ -1,5 +1,4 @@
 config NVDLA
-	bool "The NVIDIA Deep Learning Accelerator"
-	default n
+	tristate "The NVIDIA Deep Learning Accelerator"
 	depends on DRM
 	select DRM_GEM_CMA_HELPER

drivers/nvdla/Makefile

@@ -1,19 +1,21 @@
 
-ccflags-$(CONFIG_NVDLA) += -I$(srctree)/$(src)
-ccflags-$(CONFIG_NVDLA) += -I$(srctree)/$(src)/include
+ccflags-y += -I$(srctree)/$(src)
+ccflags-y += -I$(srctree)/$(src)/include
 
-obj-$(CONFIG_NVDLA) += scheduler.o
-obj-$(CONFIG_NVDLA) += engine.o
-obj-$(CONFIG_NVDLA) += bdma.o
-obj-$(CONFIG_NVDLA) += conv.o
-obj-$(CONFIG_NVDLA) += sdp.o
-obj-$(CONFIG_NVDLA) += cdp.o
-obj-$(CONFIG_NVDLA) += pdp.o
-obj-$(CONFIG_NVDLA) += rubik.o
-obj-$(CONFIG_NVDLA) += cache.o
-obj-$(CONFIG_NVDLA) += common.o
-obj-$(CONFIG_NVDLA) += engine_data.o
-obj-$(CONFIG_NVDLA) += engine_isr.o
-obj-$(CONFIG_NVDLA) += engine_debug.o
-obj-$(CONFIG_NVDLA) += nvdla_core_callbacks.o
-obj-$(CONFIG_NVDLA) += nvdla_gem.o
+nvdla-y := scheduler.o \
+	   engine.o \
+	   bdma.o \
+	   conv.o \
+	   sdp.o \
+	   cdp.o \
+	   pdp.o \
+	   rubik.o \
+	   cache.o \
+	   common.o \
+	   engine_data.o \
+	   engine_isr.o \
+	   engine_debug.o \
+	   nvdla_core_callbacks.o \
+	   nvdla_gem.o
+
+obj-$(CONFIG_NVDLA) += nvdla.o

drivers/nvdla/nvdla_core_callbacks.c

@@ -444,3 +444,5 @@ module_platform_driver(nvdla_driver);
 MODULE_LICENSE("Dual BSD/GPL");
 MODULE_AUTHOR("NVIDIA");
 MODULE_DESCRIPTION("Nvidia Deep Learning Accelerator driver");
+
+MODULE_IMPORT_NS(DMA_BUF);

kernel/dma/coherent.c

@@ -129,6 +129,7 @@ int dma_declare_coherent_memory(struct device *dev, phys_addr_t phys_addr,
 		dma_release_coherent_memory(mem);
 	return ret;
 }
+EXPORT_SYMBOL_GPL(dma_declare_coherent_memory);
 
 static void *__dma_alloc_from_coherent(struct device *dev,
 				       struct dma_coherent_mem *mem,