drivers/gpu/drm/amd/amdgpu/psp_v13_0_4.c - linux - Git at Google

 /*
  * Copyright 2020 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 "amdgpu.h"
 #include "amdgpu_psp.h"
 #include "amdgpu_ucode.h"
 #include "soc15_common.h"
 #include "psp_v13_0_4.h"

 #include "mp/mp_13_0_4_offset.h"
 #include "mp/mp_13_0_4_sh_mask.h"

 MODULE_FIRMWARE("amdgpu/psp_13_0_4_toc.bin");
 MODULE_FIRMWARE("amdgpu/psp_13_0_4_ta.bin");

 static int psp_v13_0_4_init_microcode(struct psp_context *psp)
 {
 	struct amdgpu_device *adev = psp->adev;
 	char ucode_prefix[30];
 	int err = 0;

 	amdgpu_ucode_ip_version_decode(adev, MP0_HWIP, ucode_prefix, sizeof(ucode_prefix));

 	switch (amdgpu_ip_version(adev, MP0_HWIP, 0)) {
 	case IP_VERSION(13, 0, 4):
 		err = psp_init_toc_microcode(psp, ucode_prefix);
 		if (err)
 			return err;
 		err = psp_init_ta_microcode(psp, ucode_prefix);
 		if (err)
 			return err;
 		break;
 	default:
 		BUG();
 	}

 	return 0;
 }

 static bool psp_v13_0_4_is_sos_alive(struct psp_context *psp)
 {
 	struct amdgpu_device *adev = psp->adev;
 	uint32_t sol_reg;

 	sol_reg = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_81);

 	return sol_reg != 0x0;
 }

 static int psp_v13_0_4_wait_for_bootloader(struct psp_context *psp)
 {
 	struct amdgpu_device *adev = psp->adev;

 	int ret;
 	int retry_loop;

 	for (retry_loop = 0; retry_loop < 10; retry_loop++) {
 		/* Wait for bootloader to signify that is
 		    ready having bit 31 of C2PMSG_35 set to 1 */
 		ret = psp_wait_for(psp,
 				   SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
 				   0x80000000,
 				   0x80000000,
 				   false);

 		if (ret == 0)
 			return 0;
 	}

 	return ret;
 }

 static int psp_v13_0_4_bootloader_load_component(struct psp_context  	*psp,
 					       struct psp_bin_desc 	*bin_desc,
 					       enum psp_bootloader_cmd  bl_cmd)
 {
 	int ret;
 	uint32_t psp_gfxdrv_command_reg = 0;
 	struct amdgpu_device *adev = psp->adev;

 	/* Check tOS sign of life register to confirm sys driver and sOS
 	 * are already been loaded.
 	 */
 	if (psp_v13_0_4_is_sos_alive(psp))
 		return 0;

 	ret = psp_v13_0_4_wait_for_bootloader(psp);
 	if (ret)
 		return ret;

 	memset(psp->fw_pri_buf, 0, PSP_1_MEG);

 	/* Copy PSP KDB binary to memory */
 	memcpy(psp->fw_pri_buf, bin_desc->start_addr, bin_desc->size_bytes);

 	/* Provide the PSP KDB to bootloader */
 	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36,
 	       (uint32_t)(psp->fw_pri_mc_addr >> 20));
 	psp_gfxdrv_command_reg = bl_cmd;
 	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35,
 	       psp_gfxdrv_command_reg);

 	ret = psp_v13_0_4_wait_for_bootloader(psp);

 	return ret;
 }

 static int psp_v13_0_4_bootloader_load_kdb(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->kdb, PSP_BL__LOAD_KEY_DATABASE);
 }

 static int psp_v13_0_4_bootloader_load_spl(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->kdb, PSP_BL__LOAD_TOS_SPL_TABLE);
 }

 static int psp_v13_0_4_bootloader_load_sysdrv(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->sys, PSP_BL__LOAD_SYSDRV);
 }

 static int psp_v13_0_4_bootloader_load_soc_drv(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->soc_drv, PSP_BL__LOAD_SOCDRV);
 }

 static int psp_v13_0_4_bootloader_load_intf_drv(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->intf_drv, PSP_BL__LOAD_INTFDRV);
 }

 static int psp_v13_0_4_bootloader_load_dbg_drv(struct psp_context *psp)
 {
 	return psp_v13_0_4_bootloader_load_component(psp, &psp->dbg_drv, PSP_BL__LOAD_DBGDRV);
 }

 static int psp_v13_0_4_bootloader_load_sos(struct psp_context *psp)
 {
 	int ret;
 	unsigned int psp_gfxdrv_command_reg = 0;
 	struct amdgpu_device *adev = psp->adev;

 	/* Check sOS sign of life register to confirm sys driver and sOS
 	 * are already been loaded.
 	 */
 	if (psp_v13_0_4_is_sos_alive(psp))
 		return 0;

 	ret = psp_v13_0_4_wait_for_bootloader(psp);
 	if (ret)
 		return ret;

 	memset(psp->fw_pri_buf, 0, PSP_1_MEG);

 	/* Copy Secure OS binary to PSP memory */
 	memcpy(psp->fw_pri_buf, psp->sos.start_addr, psp->sos.size_bytes);

 	/* Provide the PSP secure OS to bootloader */
 	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36,
 	       (uint32_t)(psp->fw_pri_mc_addr >> 20));
 	psp_gfxdrv_command_reg = PSP_BL__LOAD_SOSDRV;
 	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35,
 	       psp_gfxdrv_command_reg);

 	/* there might be handshake issue with hardware which needs delay */
 	mdelay(20);
 	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_81),
 			   RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_81),
 			   0, true);

 	return ret;
 }

 static int psp_v13_0_4_ring_stop(struct psp_context *psp,
 			       enum psp_ring_type ring_type)
 {
 	int ret = 0;
 	struct amdgpu_device *adev = psp->adev;

 	if (amdgpu_sriov_vf(adev)) {
 		/* Write the ring destroy command*/
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
 			     GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
 		/* there might be handshake issue with hardware which needs delay */
 		mdelay(20);
 		/* Wait for response flag (bit 31) */
 		ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_101),
 				   0x80000000, 0x80000000, false);
 	} else {
 		/* Write the ring destroy command*/
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_64,
 			     GFX_CTRL_CMD_ID_DESTROY_RINGS);
 		/* there might be handshake issue with hardware which needs delay */
 		mdelay(20);
 		/* Wait for response flag (bit 31) */
 		ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
 				   0x80000000, 0x80000000, false);
 	}

 	return ret;
 }

 static int psp_v13_0_4_ring_create(struct psp_context *psp,
 				 enum psp_ring_type ring_type)
 {
 	int ret = 0;
 	unsigned int psp_ring_reg = 0;
 	struct psp_ring *ring = &psp->km_ring;
 	struct amdgpu_device *adev = psp->adev;

 	if (amdgpu_sriov_vf(adev)) {
 		ret = psp_v13_0_4_ring_stop(psp, ring_type);
 		if (ret) {
 			DRM_ERROR("psp_v13_0_ring_stop_sriov failed!\n");
 			return ret;
 		}

 		/* Write low address of the ring to C2PMSG_102 */
 		psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102, psp_ring_reg);
 		/* Write high address of the ring to C2PMSG_103 */
 		psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_103, psp_ring_reg);

 		/* Write the ring initialization command to C2PMSG_101 */
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
 			     GFX_CTRL_CMD_ID_INIT_GPCOM_RING);

 		/* there might be handshake issue with hardware which needs delay */
 		mdelay(20);

 		/* Wait for response flag (bit 31) in C2PMSG_101 */
 		ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_101),
 				   0x80000000, 0x8000FFFF, false);

 	} else {
 		/* Wait for sOS ready for ring creation */
 		ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
 				   0x80000000, 0x80000000, false);
 		if (ret) {
 			DRM_ERROR("Failed to wait for trust OS ready for ring creation\n");
 			return ret;
 		}

 		/* Write low address of the ring to C2PMSG_69 */
 		psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_69, psp_ring_reg);
 		/* Write high address of the ring to C2PMSG_70 */
 		psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_70, psp_ring_reg);
 		/* Write size of ring to C2PMSG_71 */
 		psp_ring_reg = ring->ring_size;
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_71, psp_ring_reg);
 		/* Write the ring initialization command to C2PMSG_64 */
 		psp_ring_reg = ring_type;
 		psp_ring_reg = psp_ring_reg << 16;
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_64, psp_ring_reg);

 		/* there might be handshake issue with hardware which needs delay */
 		mdelay(20);

 		/* Wait for response flag (bit 31) in C2PMSG_64 */
 		ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
 				   0x80000000, 0x8000FFFF, false);
 	}

 	return ret;
 }

 static int psp_v13_0_4_ring_destroy(struct psp_context *psp,
 				  enum psp_ring_type ring_type)
 {
 	int ret = 0;
 	struct psp_ring *ring = &psp->km_ring;
 	struct amdgpu_device *adev = psp->adev;

 	ret = psp_v13_0_4_ring_stop(psp, ring_type);
 	if (ret)
 		DRM_ERROR("Fail to stop psp ring\n");

 	amdgpu_bo_free_kernel(&adev->firmware.rbuf,
 			      &ring->ring_mem_mc_addr,
 			      (void **)&ring->ring_mem);

 	return ret;
 }

 static uint32_t psp_v13_0_4_ring_get_wptr(struct psp_context *psp)
 {
 	uint32_t data;
 	struct amdgpu_device *adev = psp->adev;

 	if (amdgpu_sriov_vf(adev))
 		data = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102);
 	else
 		data = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_67);

 	return data;
 }

 static void psp_v13_0_4_ring_set_wptr(struct psp_context *psp, uint32_t value)
 {
 	struct amdgpu_device *adev = psp->adev;

 	if (amdgpu_sriov_vf(adev)) {
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102, value);
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
 			     GFX_CTRL_CMD_ID_CONSUME_CMD);
 	} else
 		WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_67, value);
 }

 static const struct psp_funcs psp_v13_0_4_funcs = {
 	.init_microcode = psp_v13_0_4_init_microcode,
 	.bootloader_load_kdb = psp_v13_0_4_bootloader_load_kdb,
 	.bootloader_load_spl = psp_v13_0_4_bootloader_load_spl,
 	.bootloader_load_sysdrv = psp_v13_0_4_bootloader_load_sysdrv,
 	.bootloader_load_soc_drv = psp_v13_0_4_bootloader_load_soc_drv,
 	.bootloader_load_intf_drv = psp_v13_0_4_bootloader_load_intf_drv,
 	.bootloader_load_dbg_drv = psp_v13_0_4_bootloader_load_dbg_drv,
 	.bootloader_load_sos = psp_v13_0_4_bootloader_load_sos,
 	.ring_create = psp_v13_0_4_ring_create,
 	.ring_stop = psp_v13_0_4_ring_stop,
 	.ring_destroy = psp_v13_0_4_ring_destroy,
 	.ring_get_wptr = psp_v13_0_4_ring_get_wptr,
 	.ring_set_wptr = psp_v13_0_4_ring_set_wptr,
 };

 void psp_v13_0_4_set_psp_funcs(struct psp_context *psp)
 {
 	psp->funcs = &psp_v13_0_4_funcs;
 }
	/*
	* Copyright 2020 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 "amdgpu.h"
	#include "amdgpu_psp.h"
	#include "amdgpu_ucode.h"
	#include "soc15_common.h"
	#include "psp_v13_0_4.h"

	#include "mp/mp_13_0_4_offset.h"
	#include "mp/mp_13_0_4_sh_mask.h"

	MODULE_FIRMWARE("amdgpu/psp_13_0_4_toc.bin");
	MODULE_FIRMWARE("amdgpu/psp_13_0_4_ta.bin");

	static int psp_v13_0_4_init_microcode(struct psp_context *psp)
	{
	struct amdgpu_device *adev = psp->adev;
	char ucode_prefix[30];
	int err = 0;

	amdgpu_ucode_ip_version_decode(adev, MP0_HWIP, ucode_prefix, sizeof(ucode_prefix));

	switch (amdgpu_ip_version(adev, MP0_HWIP, 0)) {
	case IP_VERSION(13, 0, 4):
	err = psp_init_toc_microcode(psp, ucode_prefix);
	if (err)
	return err;
	err = psp_init_ta_microcode(psp, ucode_prefix);
	if (err)
	return err;
	break;
	default:
	BUG();
	}

	return 0;
	}

	static bool psp_v13_0_4_is_sos_alive(struct psp_context *psp)
	{
	struct amdgpu_device *adev = psp->adev;
	uint32_t sol_reg;

	sol_reg = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_81);

	return sol_reg != 0x0;
	}

	static int psp_v13_0_4_wait_for_bootloader(struct psp_context *psp)
	{
	struct amdgpu_device *adev = psp->adev;

	int ret;
	int retry_loop;

	for (retry_loop = 0; retry_loop < 10; retry_loop++) {
	/* Wait for bootloader to signify that is
	ready having bit 31 of C2PMSG_35 set to 1 */
	ret = psp_wait_for(psp,
	SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_35),
	0x80000000,
	0x80000000,
	false);

	if (ret == 0)
	return 0;
	}

	return ret;
	}

	static int psp_v13_0_4_bootloader_load_component(struct psp_context *psp,
	struct psp_bin_desc *bin_desc,
	enum psp_bootloader_cmd bl_cmd)
	{
	int ret;
	uint32_t psp_gfxdrv_command_reg = 0;
	struct amdgpu_device *adev = psp->adev;

	/* Check tOS sign of life register to confirm sys driver and sOS
	* are already been loaded.
	*/
	if (psp_v13_0_4_is_sos_alive(psp))
	return 0;

	ret = psp_v13_0_4_wait_for_bootloader(psp);
	if (ret)
	return ret;

	memset(psp->fw_pri_buf, 0, PSP_1_MEG);

	/* Copy PSP KDB binary to memory */
	memcpy(psp->fw_pri_buf, bin_desc->start_addr, bin_desc->size_bytes);

	/* Provide the PSP KDB to bootloader */
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36,
	(uint32_t)(psp->fw_pri_mc_addr >> 20));
	psp_gfxdrv_command_reg = bl_cmd;
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35,
	psp_gfxdrv_command_reg);

	ret = psp_v13_0_4_wait_for_bootloader(psp);

	return ret;
	}

	static int psp_v13_0_4_bootloader_load_kdb(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->kdb, PSP_BL__LOAD_KEY_DATABASE);
	}

	static int psp_v13_0_4_bootloader_load_spl(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->kdb, PSP_BL__LOAD_TOS_SPL_TABLE);
	}

	static int psp_v13_0_4_bootloader_load_sysdrv(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->sys, PSP_BL__LOAD_SYSDRV);
	}

	static int psp_v13_0_4_bootloader_load_soc_drv(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->soc_drv, PSP_BL__LOAD_SOCDRV);
	}

	static int psp_v13_0_4_bootloader_load_intf_drv(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->intf_drv, PSP_BL__LOAD_INTFDRV);
	}

	static int psp_v13_0_4_bootloader_load_dbg_drv(struct psp_context *psp)
	{
	return psp_v13_0_4_bootloader_load_component(psp, &psp->dbg_drv, PSP_BL__LOAD_DBGDRV);
	}

	static int psp_v13_0_4_bootloader_load_sos(struct psp_context *psp)
	{
	int ret;
	unsigned int psp_gfxdrv_command_reg = 0;
	struct amdgpu_device *adev = psp->adev;

	/* Check sOS sign of life register to confirm sys driver and sOS
	* are already been loaded.
	*/
	if (psp_v13_0_4_is_sos_alive(psp))
	return 0;

	ret = psp_v13_0_4_wait_for_bootloader(psp);
	if (ret)
	return ret;

	memset(psp->fw_pri_buf, 0, PSP_1_MEG);

	/* Copy Secure OS binary to PSP memory */
	memcpy(psp->fw_pri_buf, psp->sos.start_addr, psp->sos.size_bytes);

	/* Provide the PSP secure OS to bootloader */
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_36,
	(uint32_t)(psp->fw_pri_mc_addr >> 20));
	psp_gfxdrv_command_reg = PSP_BL__LOAD_SOSDRV;
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_35,
	psp_gfxdrv_command_reg);

	/* there might be handshake issue with hardware which needs delay */
	mdelay(20);
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_81),
	RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_81),
	0, true);

	return ret;
	}

	static int psp_v13_0_4_ring_stop(struct psp_context *psp,
	enum psp_ring_type ring_type)
	{
	int ret = 0;
	struct amdgpu_device *adev = psp->adev;

	if (amdgpu_sriov_vf(adev)) {
	/* Write the ring destroy command*/
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
	GFX_CTRL_CMD_ID_DESTROY_GPCOM_RING);
	/* there might be handshake issue with hardware which needs delay */
	mdelay(20);
	/* Wait for response flag (bit 31) */
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_101),
	0x80000000, 0x80000000, false);
	} else {
	/* Write the ring destroy command*/
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_64,
	GFX_CTRL_CMD_ID_DESTROY_RINGS);
	/* there might be handshake issue with hardware which needs delay */
	mdelay(20);
	/* Wait for response flag (bit 31) */
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
	0x80000000, 0x80000000, false);
	}

	return ret;
	}

	static int psp_v13_0_4_ring_create(struct psp_context *psp,
	enum psp_ring_type ring_type)
	{
	int ret = 0;
	unsigned int psp_ring_reg = 0;
	struct psp_ring *ring = &psp->km_ring;
	struct amdgpu_device *adev = psp->adev;

	if (amdgpu_sriov_vf(adev)) {
	ret = psp_v13_0_4_ring_stop(psp, ring_type);
	if (ret) {
	DRM_ERROR("psp_v13_0_ring_stop_sriov failed!\n");
	return ret;
	}

	/* Write low address of the ring to C2PMSG_102 */
	psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102, psp_ring_reg);
	/* Write high address of the ring to C2PMSG_103 */
	psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_103, psp_ring_reg);

	/* Write the ring initialization command to C2PMSG_101 */
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
	GFX_CTRL_CMD_ID_INIT_GPCOM_RING);

	/* there might be handshake issue with hardware which needs delay */
	mdelay(20);

	/* Wait for response flag (bit 31) in C2PMSG_101 */
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_101),
	0x80000000, 0x8000FFFF, false);

	} else {
	/* Wait for sOS ready for ring creation */
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
	0x80000000, 0x80000000, false);
	if (ret) {
	DRM_ERROR("Failed to wait for trust OS ready for ring creation\n");
	return ret;
	}

	/* Write low address of the ring to C2PMSG_69 */
	psp_ring_reg = lower_32_bits(ring->ring_mem_mc_addr);
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_69, psp_ring_reg);
	/* Write high address of the ring to C2PMSG_70 */
	psp_ring_reg = upper_32_bits(ring->ring_mem_mc_addr);
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_70, psp_ring_reg);
	/* Write size of ring to C2PMSG_71 */
	psp_ring_reg = ring->ring_size;
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_71, psp_ring_reg);
	/* Write the ring initialization command to C2PMSG_64 */
	psp_ring_reg = ring_type;
	psp_ring_reg = psp_ring_reg << 16;
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_64, psp_ring_reg);

	/* there might be handshake issue with hardware which needs delay */
	mdelay(20);

	/* Wait for response flag (bit 31) in C2PMSG_64 */
	ret = psp_wait_for(psp, SOC15_REG_OFFSET(MP0, 0, regMP0_SMN_C2PMSG_64),
	0x80000000, 0x8000FFFF, false);
	}

	return ret;
	}

	static int psp_v13_0_4_ring_destroy(struct psp_context *psp,
	enum psp_ring_type ring_type)
	{
	int ret = 0;
	struct psp_ring *ring = &psp->km_ring;
	struct amdgpu_device *adev = psp->adev;

	ret = psp_v13_0_4_ring_stop(psp, ring_type);
	if (ret)
	DRM_ERROR("Fail to stop psp ring\n");

	amdgpu_bo_free_kernel(&adev->firmware.rbuf,
	&ring->ring_mem_mc_addr,
	(void **)&ring->ring_mem);

	return ret;
	}

	static uint32_t psp_v13_0_4_ring_get_wptr(struct psp_context *psp)
	{
	uint32_t data;
	struct amdgpu_device *adev = psp->adev;

	if (amdgpu_sriov_vf(adev))
	data = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102);
	else
	data = RREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_67);

	return data;
	}

	static void psp_v13_0_4_ring_set_wptr(struct psp_context *psp, uint32_t value)
	{
	struct amdgpu_device *adev = psp->adev;

	if (amdgpu_sriov_vf(adev)) {
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_102, value);
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_101,
	GFX_CTRL_CMD_ID_CONSUME_CMD);
	} else
	WREG32_SOC15(MP0, 0, regMP0_SMN_C2PMSG_67, value);
	}

	static const struct psp_funcs psp_v13_0_4_funcs = {
	.init_microcode = psp_v13_0_4_init_microcode,
	.bootloader_load_kdb = psp_v13_0_4_bootloader_load_kdb,
	.bootloader_load_spl = psp_v13_0_4_bootloader_load_spl,
	.bootloader_load_sysdrv = psp_v13_0_4_bootloader_load_sysdrv,
	.bootloader_load_soc_drv = psp_v13_0_4_bootloader_load_soc_drv,
	.bootloader_load_intf_drv = psp_v13_0_4_bootloader_load_intf_drv,
	.bootloader_load_dbg_drv = psp_v13_0_4_bootloader_load_dbg_drv,
	.bootloader_load_sos = psp_v13_0_4_bootloader_load_sos,
	.ring_create = psp_v13_0_4_ring_create,
	.ring_stop = psp_v13_0_4_ring_stop,
	.ring_destroy = psp_v13_0_4_ring_destroy,
	.ring_get_wptr = psp_v13_0_4_ring_get_wptr,
	.ring_set_wptr = psp_v13_0_4_ring_set_wptr,
	};

	void psp_v13_0_4_set_psp_funcs(struct psp_context *psp)
	{
	psp->funcs = &psp_v13_0_4_funcs;
	}