drm/amdgpu: Merge amdkfd into amdgpu

Since KFD is only supported by single GPU driver, it makes sense to merge
amdgpu and amdkfd into one module. This patch is the initial step: merge
Kconfig and Makefile.

v2: also remove kfd from drm Kconfig

Signed-off-by: Amber Lin <Amber.Lin@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Felix Kuehling <Felix.Kuehling@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/Kconfig

@@ -285,8 +285,6 @@ source "drivers/gpu/drm/bridge/Kconfig"
 
 source "drivers/gpu/drm/sti/Kconfig"
 
-source "drivers/gpu/drm/amd/amdkfd/Kconfig"
-
 source "drivers/gpu/drm/imx/Kconfig"
 
 source "drivers/gpu/drm/v3d/Kconfig"

drivers/gpu/drm/amd/amdgpu/Kconfig

@@ -42,3 +42,4 @@ config DRM_AMDGPU_GART_DEBUGFS
 
 source "drivers/gpu/drm/amd/acp/Kconfig"
 source "drivers/gpu/drm/amd/display/Kconfig"
+source "drivers/gpu/drm/amd/amdkfd/Kconfig"

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -35,7 +35,8 @@ ccflags-y := -I$(FULL_AMD_PATH)/include/asic_reg \
 	-I$(FULL_AMD_DISPLAY_PATH) \
 	-I$(FULL_AMD_DISPLAY_PATH)/include \
 	-I$(FULL_AMD_DISPLAY_PATH)/dc \
-	-I$(FULL_AMD_DISPLAY_PATH)/amdgpu_dm
+	-I$(FULL_AMD_DISPLAY_PATH)/amdgpu_dm \
+	-I$(FULL_AMD_PATH)/amdkfd
 
 amdgpu-y := amdgpu_drv.o
 
@@ -136,6 +137,9 @@ amdgpu-y += \
 amdgpu-y += amdgpu_amdkfd.o
 
 ifneq ($(CONFIG_HSA_AMD),)
+AMDKFD_PATH := ../amdkfd
+include $(FULL_AMD_PATH)/amdkfd/Makefile
+amdgpu-y += $(AMDKFD_FILES)
 amdgpu-y += \
 	 amdgpu_amdkfd_fence.o \
 	 amdgpu_amdkfd_gpuvm.o \

drivers/gpu/drm/amd/amdkfd/Kconfig

@@ -3,7 +3,7 @@
 #
 
 config HSA_AMD
-	tristate "HSA kernel driver for AMD GPU devices"
+	bool "HSA kernel driver for AMD GPU devices"
 	depends on DRM_AMDGPU && X86_64
 	imply AMD_IOMMU_V2
 	select MMU_NOTIFIER

drivers/gpu/drm/amd/amdkfd/Makefile

@@ -23,26 +23,41 @@
 # Makefile for Heterogenous System Architecture support for AMD GPU devices
 #
 
-ccflags-y := -Idrivers/gpu/drm/amd/include/  \
-		-Idrivers/gpu/drm/amd/include/asic_reg
-
-amdkfd-y	:= kfd_module.o kfd_device.o kfd_chardev.o kfd_topology.o \
-		kfd_pasid.o kfd_doorbell.o kfd_flat_memory.o \
-		kfd_process.o kfd_queue.o kfd_mqd_manager.o \
-		kfd_mqd_manager_cik.o kfd_mqd_manager_vi.o \
-		kfd_mqd_manager_v9.o \
-		kfd_kernel_queue.o kfd_kernel_queue_cik.o \
-		kfd_kernel_queue_vi.o kfd_kernel_queue_v9.o \
-		kfd_packet_manager.o kfd_process_queue_manager.o \
-		kfd_device_queue_manager.o kfd_device_queue_manager_cik.o \
-		kfd_device_queue_manager_vi.o kfd_device_queue_manager_v9.o \
-		kfd_interrupt.o kfd_events.o cik_event_interrupt.o \
-		kfd_int_process_v9.o kfd_dbgdev.o kfd_dbgmgr.o kfd_crat.o
+AMDKFD_FILES	:= $(AMDKFD_PATH)/kfd_module.o \
+		$(AMDKFD_PATH)/kfd_device.o \
+		$(AMDKFD_PATH)/kfd_chardev.o \
+		$(AMDKFD_PATH)/kfd_topology.o \
+		$(AMDKFD_PATH)/kfd_pasid.o \
+		$(AMDKFD_PATH)/kfd_doorbell.o \
+		$(AMDKFD_PATH)/kfd_flat_memory.o \
+		$(AMDKFD_PATH)/kfd_process.o \
+		$(AMDKFD_PATH)/kfd_queue.o \
+		$(AMDKFD_PATH)/kfd_mqd_manager.o \
+		$(AMDKFD_PATH)/kfd_mqd_manager_cik.o \
+		$(AMDKFD_PATH)/kfd_mqd_manager_vi.o \
+		$(AMDKFD_PATH)/kfd_mqd_manager_v9.o \
+		$(AMDKFD_PATH)/kfd_kernel_queue.o \
+		$(AMDKFD_PATH)/kfd_kernel_queue_cik.o \
+		$(AMDKFD_PATH)/kfd_kernel_queue_vi.o \
+		$(AMDKFD_PATH)/kfd_kernel_queue_v9.o \
+		$(AMDKFD_PATH)/kfd_packet_manager.o \
+		$(AMDKFD_PATH)/kfd_process_queue_manager.o \
+		$(AMDKFD_PATH)/kfd_device_queue_manager.o \
+		$(AMDKFD_PATH)/kfd_device_queue_manager_cik.o \
+		$(AMDKFD_PATH)/kfd_device_queue_manager_vi.o \
+		$(AMDKFD_PATH)/kfd_device_queue_manager_v9.o \
+		$(AMDKFD_PATH)/kfd_interrupt.o \
+		$(AMDKFD_PATH)/kfd_events.o \
+		$(AMDKFD_PATH)/cik_event_interrupt.o \
+		$(AMDKFD_PATH)/kfd_int_process_v9.o \
+		$(AMDKFD_PATH)/kfd_dbgdev.o \
+		$(AMDKFD_PATH)/kfd_dbgmgr.o \
+		$(AMDKFD_PATH)/kfd_crat.o
 
 ifneq ($(CONFIG_AMD_IOMMU_V2),)
-amdkfd-y += kfd_iommu.o
+AMDKFD_FILES += $(AMDKFD_PATH)/kfd_iommu.o
 endif
 
-amdkfd-$(CONFIG_DEBUG_FS) += kfd_debugfs.o
-
-obj-$(CONFIG_HSA_AMD)	+= amdkfd.o
+ifneq ($(CONFIG_DEBUG_FS),)
+AMDKFD_FILES += $(AMDKFD_PATH)/kfd_debugfs.o
+endif

drivers/gpu/drm/amd/amdkfd/kfd_module.c

@@ -20,21 +20,11 @@
  * OTHER DEALINGS IN THE SOFTWARE.
  */
 
-#include <linux/module.h>
 #include <linux/sched.h>
 #include <linux/moduleparam.h>
 #include <linux/device.h>
-#include <linux/printk.h>
 #include "kfd_priv.h"
 
-#define KFD_DRIVER_AUTHOR	"AMD Inc. and others"
-
-#define KFD_DRIVER_DESC		"Standalone HSA driver for AMD's GPUs"
-#define KFD_DRIVER_DATE		"20150421"
-#define KFD_DRIVER_MAJOR	0
-#define KFD_DRIVER_MINOR	7
-#define KFD_DRIVER_PATCHLEVEL	2
-
 static const struct kgd2kfd_calls kgd2kfd = {
 	.exit		= kgd2kfd_exit,
 	.probe		= kgd2kfd_probe,
@@ -95,33 +85,7 @@ module_param(halt_if_hws_hang, int, 0644);
 MODULE_PARM_DESC(halt_if_hws_hang, "Halt if HWS hang is detected (0 = off (default), 1 = on)");
 
 
-static int amdkfd_init_completed;
-
-
-int kgd2kfd_init(unsigned int interface_version,
-		const struct kgd2kfd_calls **g2f)
-{
-	if (!amdkfd_init_completed)
-		return -EPROBE_DEFER;
-
-	/*
-	 * Only one interface version is supported,
-	 * no kfd/kgd version skew allowed.
-	 */
-	if (interface_version != KFD_INTERFACE_VERSION)
-		return -EINVAL;
-
-	*g2f = &kgd2kfd;
-
-	return 0;
-}
-EXPORT_SYMBOL(kgd2kfd_init);
-
-void kgd2kfd_exit(void)
-{
-}
-
-static int __init kfd_module_init(void)
+static int kfd_init(void)
 {
 	int err;
 
@@ -129,7 +93,7 @@ static int __init kfd_module_init(void)
 	if ((sched_policy < KFD_SCHED_POLICY_HWS) ||
 		(sched_policy > KFD_SCHED_POLICY_NO_HWS)) {
 		pr_err("sched_policy has invalid value\n");
-		return -1;
+		return -EINVAL;
 	}
 
 	/* Verify module parameters */
@@ -137,7 +101,7 @@ static int __init kfd_module_init(void)
 		(max_num_of_queues_per_device >
 			KFD_MAX_NUM_OF_QUEUES_PER_DEVICE)) {
 		pr_err("max_num_of_queues_per_device must be between 1 to KFD_MAX_NUM_OF_QUEUES_PER_DEVICE\n");
-		return -1;
+		return -EINVAL;
 	}
 
 	err = kfd_chardev_init();
@@ -154,10 +118,6 @@ static int __init kfd_module_init(void)
 
 	kfd_debugfs_init();
 
-	amdkfd_init_completed = 1;
-
-	dev_info(kfd_device, "Initialized module\n");
-
 	return 0;
 
 err_create_wq:
@@ -168,23 +128,30 @@ err_ioctl:
 	return err;
 }
 
-static void __exit kfd_module_exit(void)
+static void kfd_exit(void)
 {
-	amdkfd_init_completed = 0;
-
 	kfd_debugfs_fini();
 	kfd_process_destroy_wq();
 	kfd_topology_shutdown();
 	kfd_chardev_exit();
-	pr_info("amdkfd: Removed module\n");
 }
 
-module_init(kfd_module_init);
-module_exit(kfd_module_exit);
+int kgd2kfd_init(unsigned int interface_version,
+		const struct kgd2kfd_calls **g2f)
+{
+	int err;
 
-MODULE_AUTHOR(KFD_DRIVER_AUTHOR);
-MODULE_DESCRIPTION(KFD_DRIVER_DESC);
-MODULE_LICENSE("GPL and additional rights");
-MODULE_VERSION(__stringify(KFD_DRIVER_MAJOR) "."
-	       __stringify(KFD_DRIVER_MINOR) "."
-	       __stringify(KFD_DRIVER_PATCHLEVEL));
+	err = kfd_init();
+	if (err)
+		return err;
+
+	*g2f = &kgd2kfd;
+
+	return 0;
+}
+EXPORT_SYMBOL(kgd2kfd_init);
+
+void kgd2kfd_exit(void)
+{
+	kfd_exit();
+}