drm/amd/powerplay: Add Tonga SMU support

The SMU manager handles firmware loading for other IP
blocks (GFX, SDMA, etc.).  This implements it for Tonga.

v3: delete peci sub-module
v2: use cgs interface directly

Signed-off-by: Young Yang <Young.Yang@amd.com>
Signed-off-by: Jammy Zhou <Jammy.Zhou@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

4 files changed, 881 insertions, 2 deletions

diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/Makefile b/drivers/gpu/drm/amd/powerplay/smumgr/Makefile
index 9219940a7a8f..0e3348d82f04 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/Makefile
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/Makefile
@@ -2,7 +2,7 @@
 # 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
+SMU_MGR = smumgr.o cz_smumgr.o tonga_smumgr.o
 
 AMD_PP_SMUMGR = $(addprefix $(AMD_PP_PATH)/smumgr/,$(SMU_MGR))
 
diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/smumgr.c
index 9ff5d3381666..a386ca8c9276 100644
--- a/drivers/gpu/drm/amd/powerplay/smumgr/smumgr.c
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/smumgr.c
@@ -28,6 +28,7 @@
 #include "cgs_common.h"
 #include "linux/delay.h"
 #include "cz_smumgr.h"
+#include "tonga_smumgr.h"
 
 int smum_init(struct amd_pp_init *pp_init, struct pp_instance *handle)
 {
@@ -53,7 +54,13 @@ int smum_init(struct amd_pp_init *pp_init, struct pp_instance *handle)
 		cz_smum_init(smumgr);
 		break;
 	case AMD_FAMILY_VI:
-		/* TODO */
+		switch (smumgr->chip_id) {
+		case CHIP_TONGA:
+			tonga_smum_init(smumgr);
+			break;
+		default:
+			return -EINVAL;
+		}
 		break;
 	default:
 		kfree(smumgr);
diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.c b/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.c
new file mode 100644
index 000000000000..62ff76010aa6
--- /dev/null
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.c
@@ -0,0 +1,819 @@
+/*
+ * Copyright 2015 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.
+ *
+ */
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/gfp.h>
+
+#include "smumgr.h"
+#include "tonga_smumgr.h"
+#include "pp_debug.h"
+#include "smu_ucode_xfer_vi.h"
+#include "tonga_ppsmc.h"
+#include "smu/smu_7_1_2_d.h"
+#include "smu/smu_7_1_2_sh_mask.h"
+#include "cgs_common.h"
+
+#define TONGA_SMC_SIZE			0x20000
+#define BUFFER_SIZE			80000
+#define MAX_STRING_SIZE			15
+#define BUFFER_SIZETWO              131072 /*128 *1024*/
+
+/**
+* Set the address for reading/writing the SMC SRAM space.
+* @param    smumgr  the address of the powerplay hardware manager.
+* @param    smcAddress the address in the SMC RAM to access.
+*/
+static int tonga_set_smc_sram_address(struct pp_smumgr *smumgr,
+				uint32_t smcAddress, uint32_t limit)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+	PP_ASSERT_WITH_CODE((0 == (3 & smcAddress)),
+		"SMC address must be 4 byte aligned.",
+		return -1;);
+
+	PP_ASSERT_WITH_CODE((limit > (smcAddress + 3)),
+		"SMC address is beyond the SMC RAM area.",
+		return -1;);
+
+	cgs_write_register(smumgr->device, mmSMC_IND_INDEX_0, smcAddress);
+	SMUM_WRITE_FIELD(smumgr->device, SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_11, 0);
+
+	return 0;
+}
+
+/**
+* Copy bytes from an array into the SMC RAM space.
+*
+* @param    smumgr  the address of the powerplay SMU manager.
+* @param    smcStartAddress the start address in the SMC RAM to copy bytes to.
+* @param    src the byte array to copy the bytes from.
+* @param    byteCount the number of bytes to copy.
+*/
+int tonga_copy_bytes_to_smc(struct pp_smumgr *smumgr,
+		uint32_t smcStartAddress, const uint8_t *src,
+		uint32_t byteCount, uint32_t limit)
+{
+	uint32_t addr;
+	uint32_t data, orig_data;
+	int result = 0;
+	uint32_t extra_shift;
+
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+	PP_ASSERT_WITH_CODE((0 == (3 & smcStartAddress)),
+		"SMC address must be 4 byte aligned.",
+		return 0;);
+
+	PP_ASSERT_WITH_CODE((limit > (smcStartAddress + byteCount)),
+		"SMC address is beyond the SMC RAM area.",
+		return 0;);
+
+	addr = smcStartAddress;
+
+	while (byteCount >= 4) {
+		/*
+		 * Bytes are written into the
+		 * SMC address space with the MSB first
+		 */
+		data = (src[0] << 24) + (src[1] << 16) + (src[2] << 8) + src[3];
+
+		result = tonga_set_smc_sram_address(smumgr, addr, limit);
+
+		if (result)
+			goto out;
+
+		cgs_write_register(smumgr->device, mmSMC_IND_DATA_0, data);
+
+		src += 4;
+		byteCount -= 4;
+		addr += 4;
+	}
+
+	if (0 != byteCount) {
+		/* Now write odd bytes left, do a read modify write cycle */
+		data = 0;
+
+		result = tonga_set_smc_sram_address(smumgr, addr, limit);
+		if (result)
+			goto out;
+
+		orig_data = cgs_read_register(smumgr->device,
+							mmSMC_IND_DATA_0);
+		extra_shift = 8 * (4 - byteCount);
+
+		while (byteCount > 0) {
+			data = (data << 8) + *src++;
+			byteCount--;
+		}
+
+		data <<= extra_shift;
+		data |= (orig_data & ~((~0UL) << extra_shift));
+
+		result = tonga_set_smc_sram_address(smumgr, addr, limit);
+		if (result)
+			goto out;
+
+		cgs_write_register(smumgr->device, mmSMC_IND_DATA_0, data);
+	}
+
+out:
+	return result;
+}
+
+
+int tonga_program_jump_on_start(struct pp_smumgr *smumgr)
+{
+	static unsigned char pData[] = { 0xE0, 0x00, 0x80, 0x40 };
+
+	tonga_copy_bytes_to_smc(smumgr, 0x0, pData, 4, sizeof(pData)+1);
+
+	return 0;
+}
+
+/**
+* Return if the SMC is currently running.
+*
+* @param    smumgr  the address of the powerplay hardware manager.
+*/
+static int tonga_is_smc_ram_running(struct pp_smumgr *smumgr)
+{
+	return ((0 == SMUM_READ_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+					SMC_SYSCON_CLOCK_CNTL_0, ck_disable))
+			&& (0x20100 <= cgs_read_ind_register(smumgr->device,
+					CGS_IND_REG__SMC, ixSMC_PC_C)));
+}
+
+static int tonga_send_msg_to_smc_offset(struct pp_smumgr *smumgr)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+
+	cgs_write_register(smumgr->device, mmSMC_MSG_ARG_0, 0x20000);
+	cgs_write_register(smumgr->device, mmSMC_MESSAGE_0, PPSMC_MSG_Test);
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+
+	return 0;
+}
+
+/**
+* Send a message to the SMC, and wait for its response.
+*
+* @param    smumgr  the address of the powerplay hardware manager.
+* @param    msg the message to send.
+* @return   The response that came from the SMC.
+*/
+static int tonga_send_msg_to_smc(struct pp_smumgr *smumgr, uint16_t msg)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	if (!tonga_is_smc_ram_running(smumgr))
+		return -1;
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+	PP_ASSERT_WITH_CODE(
+		1 == SMUM_READ_FIELD(smumgr->device, SMC_RESP_0, SMC_RESP),
+		"Failed to send Previous Message.",
+		return 1);
+
+	cgs_write_register(smumgr->device, mmSMC_MESSAGE_0, msg);
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+	PP_ASSERT_WITH_CODE(
+		1 == SMUM_READ_FIELD(smumgr->device, SMC_RESP_0, SMC_RESP),
+		"Failed to send Message.",
+		return 1);
+
+	return 0;
+}
+
+/*
+* Send a message to the SMC, and do not wait for its response.
+*
+* @param    smumgr  the address of the powerplay hardware manager.
+* @param    msg the message to send.
+* @return   The response that came from the SMC.
+*/
+static int tonga_send_msg_to_smc_without_waiting
+				(struct pp_smumgr *smumgr, uint16_t msg)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+	PP_ASSERT_WITH_CODE(
+		1 == SMUM_READ_FIELD(smumgr->device, SMC_RESP_0, SMC_RESP),
+		"Failed to send Previous Message.",
+		return 0);
+	cgs_write_register(smumgr->device, mmSMC_MESSAGE_0, msg);
+
+	return 0;
+}
+
+/*
+* Send a message to the SMC with parameter
+*
+* @param    smumgr:  the address of the powerplay hardware manager.
+* @param    msg: the message to send.
+* @param    parameter: the parameter to send
+* @return   The response that came from the SMC.
+*/
+static int tonga_send_msg_to_smc_with_parameter(struct pp_smumgr *smumgr,
+				uint16_t msg, uint32_t parameter)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	if (!tonga_is_smc_ram_running(smumgr))
+		return PPSMC_Result_Failed;
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+	cgs_write_register(smumgr->device, mmSMC_MSG_ARG_0, parameter);
+
+	return tonga_send_msg_to_smc(smumgr, msg);
+}
+
+/*
+* Send a message to the SMC with parameter, do not wait for response
+*
+* @param    smumgr:  the address of the powerplay hardware manager.
+* @param    msg: the message to send.
+* @param    parameter: the parameter to send
+* @return   The response that came from the SMC.
+*/
+static int tonga_send_msg_to_smc_with_parameter_without_waiting(
+			struct pp_smumgr *smumgr,
+			uint16_t msg, uint32_t parameter)
+{
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	SMUM_WAIT_FIELD_UNEQUAL(smumgr, SMC_RESP_0, SMC_RESP, 0);
+
+	cgs_write_register(smumgr->device, mmSMC_MSG_ARG_0, parameter);
+
+	return tonga_send_msg_to_smc_without_waiting(smumgr, msg);
+}
+
+/*
+ * Read a 32bit value from the SMC SRAM space.
+ * ALL PARAMETERS ARE IN HOST BYTE ORDER.
+ * @param    smumgr  the address of the powerplay hardware manager.
+ * @param    smcAddress the address in the SMC RAM to access.
+ * @param    value and output parameter for the data read from the SMC SRAM.
+ */
+int tonga_read_smc_sram_dword(struct pp_smumgr *smumgr,
+					uint32_t smcAddress, uint32_t *value,
+					uint32_t limit)
+{
+	int result;
+
+	result = tonga_set_smc_sram_address(smumgr, smcAddress, limit);
+
+	if (0 != result)
+		return result;
+
+	*value = cgs_read_register(smumgr->device, mmSMC_IND_DATA_0);
+
+	return 0;
+}
+
+/*
+ * Write a 32bit value to the SMC SRAM space.
+ * ALL PARAMETERS ARE IN HOST BYTE ORDER.
+ * @param    smumgr  the address of the powerplay hardware manager.
+ * @param    smcAddress the address in the SMC RAM to access.
+ * @param    value to write to the SMC SRAM.
+ */
+int tonga_write_smc_sram_dword(struct pp_smumgr *smumgr,
+					uint32_t smcAddress, uint32_t value,
+					uint32_t limit)
+{
+	int result;
+
+	result = tonga_set_smc_sram_address(smumgr, smcAddress, limit);
+
+	if (0 != result)
+		return result;
+
+	cgs_write_register(smumgr->device, mmSMC_IND_DATA_0, value);
+
+	return 0;
+}
+
+static int tonga_smu_fini(struct pp_smumgr *smumgr)
+{
+	if (smumgr->backend != NULL) {
+		kfree(smumgr->backend);
+		smumgr->backend = NULL;
+	}
+	return 0;
+}
+
+static enum cgs_ucode_id tonga_convert_fw_type_to_cgs(uint32_t fw_type)
+{
+	enum cgs_ucode_id result = CGS_UCODE_ID_MAXIMUM;
+
+	switch (fw_type) {
+	case UCODE_ID_SMU:
+		result = CGS_UCODE_ID_SMU;
+		break;
+	case UCODE_ID_SDMA0:
+		result = CGS_UCODE_ID_SDMA0;
+		break;
+	case UCODE_ID_SDMA1:
+		result = CGS_UCODE_ID_SDMA1;
+		break;
+	case UCODE_ID_CP_CE:
+		result = CGS_UCODE_ID_CP_CE;
+		break;
+	case UCODE_ID_CP_PFP:
+		result = CGS_UCODE_ID_CP_PFP;
+		break;
+	case UCODE_ID_CP_ME:
+		result = CGS_UCODE_ID_CP_ME;
+		break;
+	case UCODE_ID_CP_MEC:
+		result = CGS_UCODE_ID_CP_MEC;
+		break;
+	case UCODE_ID_CP_MEC_JT1:
+		result = CGS_UCODE_ID_CP_MEC_JT1;
+		break;
+	case UCODE_ID_CP_MEC_JT2:
+		result = CGS_UCODE_ID_CP_MEC_JT2;
+		break;
+	case UCODE_ID_RLC_G:
+		result = CGS_UCODE_ID_RLC_G;
+		break;
+	default:
+		break;
+	}
+
+	return result;
+}
+
+/**
+ * Convert the PPIRI firmware type to SMU type mask.
+ * For MEC, we need to check all MEC related type
+*/
+static uint16_t tonga_get_mask_for_firmware_type(uint16_t firmwareType)
+{
+	uint16_t result = 0;
+
+	switch (firmwareType) {
+	case UCODE_ID_SDMA0:
+		result = UCODE_ID_SDMA0_MASK;
+		break;
+	case UCODE_ID_SDMA1:
+		result = UCODE_ID_SDMA1_MASK;
+		break;
+	case UCODE_ID_CP_CE:
+		result = UCODE_ID_CP_CE_MASK;
+		break;
+	case UCODE_ID_CP_PFP:
+		result = UCODE_ID_CP_PFP_MASK;
+		break;
+	case UCODE_ID_CP_ME:
+		result = UCODE_ID_CP_ME_MASK;
+		break;
+	case UCODE_ID_CP_MEC:
+	case UCODE_ID_CP_MEC_JT1:
+	case UCODE_ID_CP_MEC_JT2:
+		result = UCODE_ID_CP_MEC_MASK;
+		break;
+	case UCODE_ID_RLC_G:
+		result = UCODE_ID_RLC_G_MASK;
+		break;
+	default:
+		break;
+	}
+
+	return result;
+}
+
+/**
+ * Check if the FW has been loaded,
+ * SMU will not return if loading has not finished.
+*/
+static int tonga_check_fw_load_finish(struct pp_smumgr *smumgr, uint32_t fwType)
+{
+	uint16_t fwMask = tonga_get_mask_for_firmware_type(fwType);
+
+	if (0 != SMUM_WAIT_VFPF_INDIRECT_REGISTER(smumgr, SMC_IND,
+				SOFT_REGISTERS_TABLE_28, fwMask, fwMask)) {
+		printk(KERN_ERR "[ powerplay ] check firmware loading failed\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/* Populate one firmware image to the data structure */
+static int tonga_populate_single_firmware_entry(struct pp_smumgr *smumgr,
+				uint16_t firmware_type,
+				struct SMU_Entry *pentry)
+{
+	int result;
+	struct cgs_firmware_info info = {0};
+
+	result = cgs_get_firmware_info(
+				smumgr->device,
+				tonga_convert_fw_type_to_cgs(firmware_type),
+				&info);
+
+	if (result == 0) {
+		pentry->version = 0;
+		pentry->id = (uint16_t)firmware_type;
+		pentry->image_addr_high = smu_upper_32_bits(info.mc_addr);
+		pentry->image_addr_low = smu_lower_32_bits(info.mc_addr);
+		pentry->meta_data_addr_high = 0;
+		pentry->meta_data_addr_low = 0;
+		pentry->data_size_byte = info.image_size;
+		pentry->num_register_entries = 0;
+
+		if (firmware_type == UCODE_ID_RLC_G)
+			pentry->flags = 1;
+		else
+			pentry->flags = 0;
+	} else {
+		return result;
+	}
+
+	return result;
+}
+
+static int tonga_request_smu_reload_fw(struct pp_smumgr *smumgr)
+{
+	struct tonga_smumgr *tonga_smu =
+		(struct tonga_smumgr *)(smumgr->backend);
+	uint16_t fw_to_load;
+	int result = 0;
+	struct SMU_DRAMData_TOC *toc;
+	/**
+	 * First time this gets called during SmuMgr init,
+	 * we haven't processed SMU header file yet,
+	 * so Soft Register Start offset is unknown.
+	 * However, for this case, UcodeLoadStatus is already 0,
+	 * so we can skip this if the Soft Registers Start offset is 0.
+	 */
+	cgs_write_ind_register(smumgr->device,
+		CGS_IND_REG__SMC, ixSOFT_REGISTERS_TABLE_28, 0);
+
+	tonga_send_msg_to_smc_with_parameter(smumgr,
+		PPSMC_MSG_SMU_DRAM_ADDR_HI,
+		tonga_smu->smu_buffer.mc_addr_high);
+	tonga_send_msg_to_smc_with_parameter(smumgr,
+		PPSMC_MSG_SMU_DRAM_ADDR_LO,
+		tonga_smu->smu_buffer.mc_addr_low);
+
+	toc = (struct SMU_DRAMData_TOC *)tonga_smu->pHeader;
+	toc->num_entries = 0;
+	toc->structure_version = 1;
+
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry(smumgr,
+		UCODE_ID_RLC_G,
+		&toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n",
+		return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry(smumgr,
+		UCODE_ID_CP_CE,
+		&toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n",
+		return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_CP_PFP, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_CP_ME, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_CP_MEC, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_CP_MEC_JT1, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_CP_MEC_JT2, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_SDMA0, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_populate_single_firmware_entry
+		(smumgr, UCODE_ID_SDMA1, &toc->entry[toc->num_entries++]),
+		"Failed to Get Firmware Entry.\n", return -1);
+
+	tonga_send_msg_to_smc_with_parameter(smumgr,
+		PPSMC_MSG_DRV_DRAM_ADDR_HI,
+		tonga_smu->header_buffer.mc_addr_high);
+	tonga_send_msg_to_smc_with_parameter(smumgr,
+		PPSMC_MSG_DRV_DRAM_ADDR_LO,
+		tonga_smu->header_buffer.mc_addr_low);
+
+	fw_to_load = UCODE_ID_RLC_G_MASK
+			+ UCODE_ID_SDMA0_MASK
+			+ UCODE_ID_SDMA1_MASK
+			+ UCODE_ID_CP_CE_MASK
+			+ UCODE_ID_CP_ME_MASK
+			+ UCODE_ID_CP_PFP_MASK
+			+ UCODE_ID_CP_MEC_MASK;
+
+	PP_ASSERT_WITH_CODE(
+		0 == tonga_send_msg_to_smc_with_parameter_without_waiting(
+		smumgr, PPSMC_MSG_LoadUcodes, fw_to_load),
+		"Fail to Request SMU Load uCode", return 0);
+
+	return result;
+}
+
+static int tonga_request_smu_load_specific_fw(struct pp_smumgr *smumgr,
+				uint32_t firmwareType)
+{
+	return 0;
+}
+
+/**
+ * Upload the SMC firmware to the SMC microcontroller.
+ *
+ * @param    smumgr  the address of the powerplay hardware manager.
+ * @param    pFirmware the data structure containing the various sections of the firmware.
+ */
+static int tonga_smu_upload_firmware_image(struct pp_smumgr *smumgr)
+{
+	const uint8_t *src;
+	uint32_t byte_count;
+	uint32_t *data;
+	struct cgs_firmware_info info = {0};
+
+	if (smumgr == NULL || smumgr->device == NULL)
+		return -EINVAL;
+
+	cgs_get_firmware_info(smumgr->device,
+		tonga_convert_fw_type_to_cgs(UCODE_ID_SMU), &info);
+
+	if (info.image_size & 3) {
+		printk(KERN_ERR "[ powerplay ] SMC ucode is not 4 bytes aligned\n");
+		return -EINVAL;
+	}
+
+	if (info.image_size > TONGA_SMC_SIZE) {
+		printk(KERN_ERR "[ powerplay ] SMC address is beyond the SMC RAM area\n");
+		return -EINVAL;
+	}
+
+	cgs_write_register(smumgr->device, mmSMC_IND_INDEX_0, 0x20000);
+	SMUM_WRITE_FIELD(smumgr->device, SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, 1);
+
+	byte_count = info.image_size;
+	src = (const uint8_t *)info.kptr;
+
+	data = (uint32_t *)src;
+	for (; byte_count >= 4; data++, byte_count -= 4)
+		cgs_write_register(smumgr->device, mmSMC_IND_DATA_0, data[0]);
+
+	SMUM_WRITE_FIELD(smumgr->device, SMC_IND_ACCESS_CNTL, AUTO_INCREMENT_IND_0, 0);
+
+	return 0;
+}
+
+static int tonga_start_in_protection_mode(struct pp_smumgr *smumgr)
+{
+	int result;
+
+	/* Assert reset */
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_RESET_CNTL, rst_reg, 1);
+
+	result = tonga_smu_upload_firmware_image(smumgr);
+	if (result)
+		return result;
+
+	/* Clear status */
+	cgs_write_ind_register(smumgr->device, CGS_IND_REG__SMC,
+		ixSMU_STATUS, 0);
+
+	/* Enable clock */
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_CLOCK_CNTL_0, ck_disable, 0);
+
+	/* De-assert reset */
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_RESET_CNTL, rst_reg, 0);
+
+	/* Set SMU Auto Start */
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMU_INPUT_DATA, AUTO_START, 1);
+
+	/* Clear firmware interrupt enable flag */
+	cgs_write_ind_register(smumgr->device, CGS_IND_REG__SMC,
+		ixFIRMWARE_FLAGS, 0);
+
+	SMUM_WAIT_VFPF_INDIRECT_FIELD(smumgr, SMC_IND,
+		RCU_UC_EVENTS, INTERRUPTS_ENABLED, 1);
+
+	/**
+	 * Call Test SMU message with 0x20000 offset to trigger SMU start
+	 */
+	tonga_send_msg_to_smc_offset(smumgr);
+
+	/* Wait for done bit to be set */
+	SMUM_WAIT_VFPF_INDIRECT_FIELD_UNEQUAL(smumgr, SMC_IND,
+		SMU_STATUS, SMU_DONE, 0);
+
+	/* Check pass/failed indicator */
+	if (1 != SMUM_READ_VFPF_INDIRECT_FIELD(smumgr->device,
+				CGS_IND_REG__SMC, SMU_STATUS, SMU_PASS)) {
+		printk(KERN_ERR "[ powerplay ] SMU Firmware start failed\n");
+		return -EINVAL;
+	}
+
+	/* Wait for firmware to initialize */
+	SMUM_WAIT_VFPF_INDIRECT_FIELD(smumgr, SMC_IND,
+		FIRMWARE_FLAGS, INTERRUPTS_ENABLED, 1);
+
+	return 0;
+}
+
+
+static int tonga_start_in_non_protection_mode(struct pp_smumgr *smumgr)
+{
+	int result = 0;
+
+	/* wait for smc boot up */
+	SMUM_WAIT_VFPF_INDIRECT_FIELD_UNEQUAL(smumgr, SMC_IND,
+		RCU_UC_EVENTS, boot_seq_done, 0);
+
+	/*Clear firmware interrupt enable flag*/
+	cgs_write_ind_register(smumgr->device, CGS_IND_REG__SMC,
+		ixFIRMWARE_FLAGS, 0);
+
+
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_RESET_CNTL, rst_reg, 1);
+
+	result = tonga_smu_upload_firmware_image(smumgr);
+
+	if (result != 0)
+		return result;
+
+	/* Set smc instruct start point at 0x0 */
+	tonga_program_jump_on_start(smumgr);
+
+
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_CLOCK_CNTL_0, ck_disable, 0);
+
+	/*De-assert reset*/
+	SMUM_WRITE_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+		SMC_SYSCON_RESET_CNTL, rst_reg, 0);
+
+	/* Wait for firmware to initialize */
+	SMUM_WAIT_VFPF_INDIRECT_FIELD(smumgr, SMC_IND,
+		FIRMWARE_FLAGS, INTERRUPTS_ENABLED, 1);
+
+	return result;
+}
+
+static int tonga_start_smu(struct pp_smumgr *smumgr)
+{
+	int result;
+
+	/* Only start SMC if SMC RAM is not running */
+	if (!tonga_is_smc_ram_running(smumgr)) {
+		/*Check if SMU is running in protected mode*/
+		if (0 == SMUM_READ_VFPF_INDIRECT_FIELD(smumgr->device, CGS_IND_REG__SMC,
+					SMU_FIRMWARE, SMU_MODE)) {
+			result = tonga_start_in_non_protection_mode(smumgr);
+			if (result)
+				return result;
+		} else {
+			result = tonga_start_in_protection_mode(smumgr);
+			if (result)
+				return result;
+		}
+	}
+
+	result = tonga_request_smu_reload_fw(smumgr);
+
+	return result;
+}
+
+/**
+ * Write a 32bit value to the SMC SRAM space.
+ * ALL PARAMETERS ARE IN HOST BYTE ORDER.
+ * @param    smumgr  the address of the powerplay hardware manager.
+ * @param    smcAddress the address in the SMC RAM to access.
+ * @param    value to write to the SMC SRAM.
+ */
+static int tonga_smu_init(struct pp_smumgr *smumgr)
+{
+	struct tonga_smumgr *tonga_smu;
+	uint8_t *internal_buf;
+	uint64_t mc_addr = 0;
+	/* Allocate memory for backend private data */
+	tonga_smu = (struct tonga_smumgr *)(smumgr->backend);
+	tonga_smu->header_buffer.data_size =
+		((sizeof(struct SMU_DRAMData_TOC) / 4096) + 1) * 4096;
+	tonga_smu->smu_buffer.data_size = 200*4096;
+
+	smu_allocate_memory(smumgr->device,
+		tonga_smu->header_buffer.data_size,
+		CGS_GPU_MEM_TYPE__VISIBLE_CONTIG_FB,
+		PAGE_SIZE,
+		&mc_addr,
+		&tonga_smu->header_buffer.kaddr,
+		&tonga_smu->header_buffer.handle);
+
+	tonga_smu->pHeader = tonga_smu->header_buffer.kaddr;
+	tonga_smu->header_buffer.mc_addr_high = smu_upper_32_bits(mc_addr);
+	tonga_smu->header_buffer.mc_addr_low = smu_lower_32_bits(mc_addr);
+
+	PP_ASSERT_WITH_CODE((NULL != tonga_smu->pHeader),
+		"Out of memory.",
+		kfree(smumgr->backend);
+		cgs_free_gpu_mem(smumgr->device,
+		(cgs_handle_t)tonga_smu->header_buffer.handle);
+		return -1);
+
+	smu_allocate_memory(smumgr->device,
+		tonga_smu->smu_buffer.data_size,
+		CGS_GPU_MEM_TYPE__VISIBLE_CONTIG_FB,
+		PAGE_SIZE,
+		&mc_addr,
+		&tonga_smu->smu_buffer.kaddr,
+		&tonga_smu->smu_buffer.handle);
+
+	internal_buf = tonga_smu->smu_buffer.kaddr;
+	tonga_smu->smu_buffer.mc_addr_high = smu_upper_32_bits(mc_addr);
+	tonga_smu->smu_buffer.mc_addr_low = smu_lower_32_bits(mc_addr);
+
+	PP_ASSERT_WITH_CODE((NULL != internal_buf),
+		"Out of memory.",
+		kfree(smumgr->backend);
+		cgs_free_gpu_mem(smumgr->device,
+		(cgs_handle_t)tonga_smu->smu_buffer.handle);
+		return -1;);
+
+	return 0;
+}
+
+static const struct pp_smumgr_func tonga_smu_funcs = {
+	.smu_init = &tonga_smu_init,
+	.smu_fini = &tonga_smu_fini,
+	.start_smu = &tonga_start_smu,
+	.check_fw_load_finish = &tonga_check_fw_load_finish,
+	.request_smu_load_fw = &tonga_request_smu_reload_fw,
+	.request_smu_load_specific_fw = &tonga_request_smu_load_specific_fw,
+	.send_msg_to_smc = &tonga_send_msg_to_smc,
+	.send_msg_to_smc_with_parameter = &tonga_send_msg_to_smc_with_parameter,
+	.download_pptable_settings = NULL,
+	.upload_pptable_settings = NULL,
+};
+
+int tonga_smum_init(struct pp_smumgr *smumgr)
+{
+	struct tonga_smumgr *tonga_smu = NULL;
+
+	tonga_smu = kzalloc(sizeof(struct tonga_smumgr), GFP_KERNEL);
+
+	if (tonga_smu == NULL)
+		return -1;
+
+	smumgr->backend = tonga_smu;
+	smumgr->smumgr_funcs = &tonga_smu_funcs;
+
+	return 0;
+}
diff --git a/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.h b/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.h
new file mode 100644
index 000000000000..33c788d7f05c
--- /dev/null
+++ b/drivers/gpu/drm/amd/powerplay/smumgr/tonga_smumgr.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2015 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.
+ *
+ */
+
+#ifndef _TONGA_SMUMGR_H_
+#define _TONGA_SMUMGR_H_
+
+struct tonga_buffer_entry {
+	uint32_t data_size;
+	uint32_t mc_addr_low;
+	uint32_t mc_addr_high;
+	void *kaddr;
+	unsigned long  handle;
+};
+
+struct tonga_smumgr {
+	uint8_t *pHeader;
+	uint8_t *pMecImage;
+	uint32_t ulSoftRegsStart;
+
+	struct tonga_buffer_entry header_buffer;
+	struct tonga_buffer_entry smu_buffer;
+};
+
+extern int tonga_smum_init(struct pp_smumgr *smumgr);
+extern int tonga_copy_bytes_to_smc(struct pp_smumgr *smumgr,
+		uint32_t smcStartAddress, const uint8_t *src,
+		uint32_t byteCount, uint32_t limit);
+extern int tonga_read_smc_sram_dword(struct pp_smumgr *smumgr, uint32_t smcAddress,
+		uint32_t *value, uint32_t limit);
+extern int tonga_write_smc_sram_dword(struct pp_smumgr *smumgr, uint32_t smcAddress,
+		uint32_t value, uint32_t limit);
+
+#endif