drm/amdgpu: add amdgpu <--> amdkfd gfx7 interface

This patch adds the gfx7 interface file between amdgpu and amdkfd. This
interface file mirrors (some) of the functions in radeon_kfd.c
(the interface file between radeon and amdkfd).

The gfx7 interface is used when it is run on a Kaveri-based system.

This interface file was used for bring-up of amdkfd on amdgpu and for
debugging purposes. For users who would like to run HSA on Kaveri, please
use the radeon graphic driver.

Note: CONFIG_DRM_AMDGPU_CIK must be selected for amdgpu to handle Kaveri.

v2: removed MTYPE_NONCACHED enum definition as it is defined in another
patch
Signed-off-by: Oded Gabbay <oded.gabbay@gmail.com>

MAINTAINERS

@@ -638,6 +638,7 @@ T:	git git://people.freedesktop.org/~gabbayo/linux.git
 S:	Supported
 F:	drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c
 F:	drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.h
+F:	drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd_gfx_v7.c
 F:	drivers/gpu/drm/amd/amdkfd/
 F:	drivers/gpu/drm/amd/include/cik_structs.h
 F:	drivers/gpu/drm/amd/include/kgd_kfd_interface.h

drivers/gpu/drm/amd/amdgpu/Makefile

@@ -73,7 +73,8 @@ amdgpu-y += \
 
 # add amdkfd interfaces
 amdgpu-y += \
-	 amdgpu_amdkfd.o
+	 amdgpu_amdkfd.o \
+	 amdgpu_amdkfd_gfx_v7.o
 
 amdgpu-$(CONFIG_COMPAT) += amdgpu_ioc32.o
 amdgpu-$(CONFIG_VGA_SWITCHEROO) += amdgpu_atpx_handler.o

drivers/gpu/drm/amd/amdgpu/amdgpu_amdkfd.c

@@ -51,6 +51,8 @@ bool amdgpu_amdkfd_load_interface(struct amdgpu_device *rdev)
 
 	switch (rdev->asic_type) {
 	case CHIP_KAVERI:
+		kfd2kgd = amdgpu_amdkfd_gfx_7_get_functions();
+		break;
 	default:
 		return false;
 	}

drivers/gpu/drm/amd/amdgpu/cikd.h

@@ -552,6 +552,12 @@
 #define VCE_CMD_IB_AUTO		0x00000005
 #define VCE_CMD_SEMAPHORE	0x00000006
 
+/* if PTR32, these are the bases for scratch and lds */
+#define	PRIVATE_BASE(x)	((x) << 0) /* scratch */
+#define	SHARED_BASE(x)	((x) << 16) /* LDS */
+
+#define KFD_CIK_SDMA_QUEUE_OFFSET	0x200
+
 /* valid for both DEFAULT_MTYPE and APE1_MTYPE */
 enum {
 	MTYPE_CACHED = 0,