drm/amd/powerplay: add iceland SMU mananger

The system management unit (SMU) is a subcomponent of the northbridge
that is responsible for a variety of system and power management tasks
during boot and runtime for GPU. In powerplay, it will be used on
firmware loading and power task management. This patch adds SMU
mananger for iceland.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/powerplay/smumgr/Makefile

@@ -2,7 +2,8 @@
 # Makefile for the 'smu manager' sub-component of powerplay.
 # It provides the smu management services for the driver.
 
-SMU_MGR = smumgr.o cz_smumgr.o tonga_smumgr.o fiji_smumgr.o polaris10_smumgr.o
+SMU_MGR = smumgr.o cz_smumgr.o tonga_smumgr.o fiji_smumgr.o \
+	  polaris10_smumgr.o iceland_smumgr.o
 
 AMD_PP_SMUMGR = $(addprefix $(AMD_PP_PATH)/smumgr/,$(SMU_MGR))
 

drivers/gpu/drm/amd/powerplay/smumgr/iceland_smumgr.h

+/*
+ * Copyright 2016 Advanced Micro Devices, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Author: Huang Rui <ray.huang@amd.com>
+ *
+ */
+
+#ifndef _ICELAND_SMUMGR_H_
+#define _ICELAND_SMUMGR_H_
+
+struct iceland_buffer_entry {
+	uint32_t data_size;
+	uint32_t mc_addr_low;
+	uint32_t mc_addr_high;
+	void *kaddr;
+	unsigned long  handle;
+};
+
+/* Iceland only has header_buffer, don't have smu buffer. */
+struct iceland_smumgr {
+	uint8_t *pHeader;
+	uint8_t *pMecImage;
+	uint32_t ulSoftRegsStart;
+
+	struct iceland_buffer_entry header_buffer;
+};
+
+extern int iceland_smum_init(struct pp_smumgr *smumgr);
+extern int iceland_copy_bytes_to_smc(struct pp_smumgr *smumgr,
+				     uint32_t smcStartAddress,
+				     const uint8_t *src,
+				     uint32_t byteCount, uint32_t limit);
+
+extern int iceland_smu_start_smc(struct pp_smumgr *smumgr);
+
+extern int iceland_read_smc_sram_dword(struct pp_smumgr *smumgr,
+				       uint32_t smcAddress,
+				       uint32_t *value, uint32_t limit);
+extern int iceland_write_smc_sram_dword(struct pp_smumgr *smumgr,
+					uint32_t smcAddress,
+					uint32_t value, uint32_t limit);
+
+extern bool iceland_is_smc_ram_running(struct pp_smumgr *smumgr);
+extern int iceland_smu_upload_firmware_image(struct pp_smumgr *smumgr);
+
+#endif

drivers/gpu/drm/amd/powerplay/smumgr/smumgr.c

@@ -30,6 +30,7 @@
 #include "linux/delay.h"
 #include "cz_smumgr.h"
 #include "tonga_smumgr.h"
+#include "iceland_smumgr.h"
 #include "fiji_smumgr.h"
 #include "polaris10_smumgr.h"
 
@@ -58,6 +59,9 @@ int smum_init(struct amd_pp_init *pp_init, struct pp_instance *handle)
 		break;
 	case AMDGPU_FAMILY_VI:
 		switch (smumgr->chip_id) {
+		case CHIP_TOPAZ:
+			iceland_smum_init(smumgr);
+			break;
 		case CHIP_TONGA:
 			tonga_smum_init(smumgr);
 			break;