/* Copyright (c) 2015-2018, The Linux Foundation. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 and
 * only version 2 as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#include <linux/io.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/mutex.h>
#include <linux/slab.h>
#include <linux/types.h>
#include <linux/qcom_scm.h>
#include <linux/arm-smccc.h>
#include <linux/dma-mapping.h>
#include <asm/cacheflush.h>

#include "qcom_scm.h"

#define QCOM_SCM_FNID(s, c) ((((s) & 0xFF) << 8) | ((c) & 0xFF))

#define MAX_QCOM_SCM_ARGS 10
#define MAX_QCOM_SCM_RETS 3

enum qcom_scm_arg_types {
	QCOM_SCM_VAL,
	QCOM_SCM_RO,
	QCOM_SCM_RW,
	QCOM_SCM_BUFVAL,
};

#define QCOM_SCM_ARGS_IMPL(num, a, b, c, d, e, f, g, h, i, j, ...) (\
			   (((a) & 0x3) << 4) | \
			   (((b) & 0x3) << 6) | \
			   (((c) & 0x3) << 8) | \
			   (((d) & 0x3) << 10) | \
			   (((e) & 0x3) << 12) | \
			   (((f) & 0x3) << 14) | \
			   (((g) & 0x3) << 16) | \
			   (((h) & 0x3) << 18) | \
			   (((i) & 0x3) << 20) | \
			   (((j) & 0x3) << 22) | \
			   ((num) & 0xf))

#define QCOM_SCM_ARGS(...) QCOM_SCM_ARGS_IMPL(__VA_ARGS__, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0)

/**
 * struct qcom_scm_desc
 * @arginfo:	Metadata describing the arguments in args[]
 * @args:	The array of arguments for the secure syscall
 * @res:	The values returned by the secure syscall
 */
struct qcom_scm_desc {
	u32 arginfo;
	u64 args[MAX_QCOM_SCM_ARGS];
};

static u64 qcom_smccc_convention = -1;
static DEFINE_MUTEX(qcom_scm_lock);

#define QCOM_SCM_EBUSY_WAIT_MS 30
#define QCOM_SCM_EBUSY_MAX_RETRY 20

#define N_EXT_QCOM_SCM_ARGS 7
#define FIRST_EXT_ARG_IDX 3
#define N_REGISTER_ARGS (MAX_QCOM_SCM_ARGS - N_EXT_QCOM_SCM_ARGS + 1)

bool is_scm_armv8(void)
{
	return true;
}

/**
 * qcom_scm_call() - Invoke a syscall in the secure world
 * @dev:	device
 * @svc_id:	service identifier
 * @cmd_id:	command identifier
 * @desc:	Descriptor structure containing arguments and return values
 *
 * Sends a command to the SCM and waits for the command to finish processing.
 * This should *only* be called in pre-emptible context.
*/
static int qcom_scm_call(struct device *dev, u32 owner_id, u32 svc_id,
			 u32 cmd_id, const struct qcom_scm_desc *desc,
			 struct arm_smccc_res *res)
{
	int arglen = desc->arginfo & 0xf;
	int retry_count = 0, i;
	u32 fn_id = QCOM_SCM_FNID(svc_id, cmd_id);
	u64 cmd, x5 = desc->args[FIRST_EXT_ARG_IDX];
	dma_addr_t args_phys = 0;
	void *args_virt = NULL;
	size_t alloc_len;
	struct arm_smccc_quirk quirk = {.id = ARM_SMCCC_QUIRK_QCOM_A6};

	if (unlikely(arglen > N_REGISTER_ARGS)) {
		alloc_len = N_EXT_QCOM_SCM_ARGS * sizeof(u64);
		args_virt = kzalloc(PAGE_ALIGN(alloc_len), GFP_KERNEL);

		if (!args_virt)
			return -ENOMEM;

		if (qcom_smccc_convention == ARM_SMCCC_SMC_32) {
			__le32 *args = args_virt;

			for (i = 0; i < N_EXT_QCOM_SCM_ARGS; i++)
				args[i] = cpu_to_le32(desc->args[i +
						      FIRST_EXT_ARG_IDX]);
		} else {
			__le64 *args = args_virt;

			for (i = 0; i < N_EXT_QCOM_SCM_ARGS; i++)
				args[i] = cpu_to_le64(desc->args[i +
						      FIRST_EXT_ARG_IDX]);
		}

		args_phys = dma_map_single(dev, args_virt, alloc_len,
					   DMA_TO_DEVICE);

		if (dma_mapping_error(dev, args_phys)) {
			kfree(args_virt);
			return -ENOMEM;
		}

		x5 = args_phys;
	}

	do {
		mutex_lock(&qcom_scm_lock);

		cmd = ARM_SMCCC_CALL_VAL(ARM_SMCCC_STD_CALL,
					 qcom_smccc_convention,
					 owner_id, fn_id);

		quirk.state.a6 = 0;

		do {
			arm_smccc_smc_quirk(cmd, desc->arginfo, desc->args[0],
				      desc->args[1], desc->args[2], x5,
				      quirk.state.a6, 0, res, &quirk);

			if (res->a0 == QCOM_SCM_INTERRUPTED)
				cmd = res->a0;

		} while (res->a0 == QCOM_SCM_INTERRUPTED);

		mutex_unlock(&qcom_scm_lock);

		if (res->a0 == QCOM_SCM_V2_EBUSY) {
			if (retry_count++ > QCOM_SCM_EBUSY_MAX_RETRY)
				break;
			msleep(QCOM_SCM_EBUSY_WAIT_MS);
		}
	}  while (res->a0 == QCOM_SCM_V2_EBUSY);

	if (args_virt) {
		dma_unmap_single(dev, args_phys, alloc_len, DMA_TO_DEVICE);
		kfree(args_virt);
	}

	if ((signed long)res->a0 < 0)
		return qcom_scm_remap_error((signed long)res->a0);

	return 0;
}

/**
 * qcom_scm_set_cold_boot_addr() - Set the cold boot address for cpus
 * @entry: Entry point function for the cpus
 * @cpus: The cpumask of cpus that will use the entry point
 *
 * Set the cold boot address of the cpus. Any cpu outside the supported
 * range would be removed from the cpu present mask.
 */
int __qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
{
	return 0;
}

/**
 * qcom_scm_set_warm_boot_addr() - Set the warm boot address for cpus
 * @dev: Device pointer
 * @entry: Entry point function for the cpus
 * @cpus: The cpumask of cpus that will use the entry point
 *
 * Set the Linux entry point for the SCM to transfer control to when coming
 * out of a power down. CPU power down may be executed on cpuidle or hotplug.
 */
int __qcom_scm_set_warm_boot_addr(struct device *dev, void *entry,
				  const cpumask_t *cpus)
{
	return -ENOTSUPP;
}

/**
 * qcom_scm_cpu_power_down() - Power down the cpu
 * @flags - Flags to flush cache
 *
 * This is an end point to power down cpu. If there was a pending interrupt,
 * the control would return from this function, otherwise, the cpu jumps to the
 * warm boot entry point set for this cpu upon reset.
 */
void __qcom_scm_cpu_power_down(u32 flags)
{
}

int __qcom_scm_tls_hardening(struct device *dev,
			    struct scm_cmd_buf_t *scm_cmd_buf,
			    size_t buf_size, u32 cmd_id)
{
	return -ENOTSUPP;
}

int __qcom_scm_get_feat_version(struct device *dev, u32 feat, u64 *version)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	ret = __qcom_scm_is_call_available(dev, SCM_SVC_INFO,
						GET_FEAT_VERSION_CMD);
	if (ret <= 0)
		return -EAGAIN;

	desc.args[0] = feat;
	desc.arginfo = SCM_ARGS(1);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, SCM_SVC_INFO,
				GET_FEAT_VERSION_CMD, &desc, &res);

	*version = (u64) res.a1;

	return ret;

}

int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.arginfo = QCOM_SCM_ARGS(1);
	desc.args[0] = QCOM_SCM_FNID(svc_id, cmd_id) |
			(ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_INFO,
			    QCOM_IS_CALL_AVAIL_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
			u32 req_cnt, u32 *resp)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
		return -ERANGE;

	desc.args[0] = req[0].addr;
	desc.args[1] = req[0].val;
	desc.args[2] = req[1].addr;
	desc.args[3] = req[1].val;
	desc.args[4] = req[2].addr;
	desc.args[5] = req[2].val;
	desc.args[6] = req[3].addr;
	desc.args[7] = req[3].val;
	desc.args[8] = req[4].addr;
	desc.args[9] = req[4].val;
	desc.arginfo = QCOM_SCM_ARGS(10);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_HDCP,
			    QCOM_SCM_CMD_HDCP, &desc, &res);
	*resp = res.a1;

	return ret;
}

void __qcom_scm_init(void)
{
	u64 cmd;
	struct arm_smccc_res res;
	u32 function = QCOM_SCM_FNID(QCOM_SCM_SVC_INFO, QCOM_IS_CALL_AVAIL_CMD);

	/* First try a SMC64 call */
	cmd = ARM_SMCCC_CALL_VAL(ARM_SMCCC_FAST_CALL, ARM_SMCCC_SMC_64,
				 ARM_SMCCC_OWNER_SIP, function);

	arm_smccc_smc(cmd, QCOM_SCM_ARGS(1), cmd & (~BIT(ARM_SMCCC_TYPE_SHIFT)),
		      0, 0, 0, 0, 0, &res);

	if (!res.a0 && res.a1)
		qcom_smccc_convention = ARM_SMCCC_SMC_64;
	else
		qcom_smccc_convention = ARM_SMCCC_SMC_32;
}

bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = peripheral;
	desc.arginfo = QCOM_SCM_ARGS(1);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_IS_SUPPORTED_CMD, &desc, &res);

	return ret ? false : !!res.a1;
}

int __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
			      dma_addr_t metadata_phys)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = peripheral;
	desc.args[1] = metadata_phys;
	desc.arginfo = QCOM_SCM_ARGS(2, QCOM_SCM_VAL, QCOM_SCM_RW);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_INIT_IMAGE_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
			      phys_addr_t addr, phys_addr_t size)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = peripheral;
	desc.args[1] = addr;
	desc.args[2] = size;
	desc.arginfo = QCOM_SCM_ARGS(3);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_MEM_SETUP_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral, u32 debug)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	static int break_support = 0;

	if (debug) {
		ret = __qcom_scm_is_call_available(dev,
				QCOM_SCM_SVC_PIL,
				QCOM_SCM_PAS_AUTH_DEBUG_RESET_CMD);
		if (!ret)
			pr_err("No Break at reset supported\n");
		else
			break_support = 1;
	}

	if (break_support) {
		desc.args[0] = debug;
		desc.arginfo = QCOM_SCM_ARGS(1);
		ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
				QCOM_SCM_PAS_AUTH_DEBUG_RESET_CMD, &desc, &res);
		if (ret || res.a1)
			return ret ? : res.a1;
	}

	desc.args[0] = peripheral;
	desc.arginfo = QCOM_SCM_ARGS(1);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_AUTH_AND_RESET_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral)
{
	int ret;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = peripheral;
	desc.arginfo = QCOM_SCM_ARGS(1);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_SHUTDOWN_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;

	desc.args[0] = reset;
	desc.args[1] = 0;
	desc.arginfo = QCOM_SCM_ARGS(2);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_PIL,
			    QCOM_SCM_PAS_MSS_RESET, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_qfprom_show_authenticate(struct device *dev, char *buf)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};
	dma_addr_t auth_phys;
	void *auth_buf;

	auth_buf = dma_alloc_coherent(dev, sizeof(*buf),
					&auth_phys, GFP_KERNEL);
	if (!auth_buf) {
		dev_err(dev, "Allocation for auth buffer failed\n");
		return -ENOMEM;
	}
	desc.args[0] = (u64)auth_phys;
	desc.args[1] = sizeof(char);
	desc.arginfo = SCM_ARGS(2, SCM_RO);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_FUSE,
			    QCOM_QFPROM_IS_AUTHENTICATE_CMD, &desc, &res);
	memcpy(buf, auth_buf, sizeof(char));
	dma_free_coherent(dev, sizeof(*buf), auth_buf, auth_phys);
	return ret ? : res.a1;
}

int __qcom_config_ice_sec(struct device *dev, void *confBuf, int size)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};
	dma_addr_t conf_phys;

	conf_phys = dma_map_single(dev, confBuf, size, DMA_TO_DEVICE);

	ret = dma_mapping_error(dev, conf_phys);
	if (ret) {
		dev_err(dev, "Allocation fail for conf buffer\n");
		return -ENOMEM;
	}
	desc.arginfo = SCM_ARGS(2, QCOM_SCM_PARAM_BUF_RO, QCOM_SCM_PARAM_VAL);
	desc.args[0] = (u64)conf_phys;
	desc.args[1] = size;

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SVC_ICE,
			    QCOM_SCM_ICE_CMD, &desc, &res);

	dma_unmap_single(dev, conf_phys, size, DMA_TO_DEVICE);
	return ret ? : res.a1;
}

int __qcom_set_qcekey_sec(struct device *dev, void *confBuf, int size)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};
	dma_addr_t conf_phys;

	conf_phys = dma_map_single(dev, confBuf, size, DMA_TO_DEVICE);

	ret = dma_mapping_error(dev, conf_phys);
	if (ret) {
		dev_err(dev, "Allocation fail for conf buffer\n");
		return -ENOMEM;
	}
	desc.arginfo = SCM_ARGS(1, QCOM_SCM_PARAM_BUF_RO);
	desc.args[0] = (u64)conf_phys;
	desc.args[1] = size;

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_QCE_CRYPTO_SIP,
			    QCOM_SCM_QCE_CMD, &desc, &res);

	dma_unmap_single(dev, conf_phys, size, DMA_TO_DEVICE);
	return ret ? : res.a1;
}

int __qcom_sec_release_xpu_prot(struct device *dev)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};

	desc.arginfo = SCM_ARGS(0, QCOM_SCM_PARAM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_QCE_CRYPTO_SIP,
			QCOM_SCM_QCE_UNLOCK_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_sec_upgrade_auth(struct device *dev, unsigned int sw_type,
			unsigned int img_size, unsigned int load_addr)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};

	desc.args[0] = sw_type;
	desc.args[1] = img_size;
	desc.args[2] = (u64)load_addr;
	desc.arginfo = SCM_ARGS(3, SCM_VAL, SCM_VAL, SCM_RW);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_BOOT,
			    QCOM_KERNEL_AUTH_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_qfprom_write_version(struct device *dev, void *wrip, int size)
{
	return -ENOTSUPP;
}

int __qcom_qfprom_read_version(struct device *dev, uint32_t sw_type,
			uint32_t value, uint32_t qfprom_ret_ptr)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};

	desc.args[0] = sw_type;
	desc.args[1] = (u64)value;
	desc.args[2] = sizeof(uint32_t);
	desc.args[3] = (u64)qfprom_ret_ptr;
	desc.args[4] = sizeof(uint32_t);

	desc.arginfo = SCM_ARGS(5, SCM_VAL, SCM_RW, SCM_VAL, SCM_RW,
						SCM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_FUSE,
			    QCOM_QFPROM_ROW_READ_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_regsave(struct device *dev, u32 svc_id, u32 cmd_id,
			void *scm_regsave, unsigned int buf_size)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;

	desc.args[0] = (u64)virt_to_phys(scm_regsave);
	desc.args[1] = buf_size;
	desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_REGSAVE,
			    QCOM_SCM_REGSAVE_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_extwdt(struct device *dev, u32 svc_id, u32 cmd_id,
			unsigned int regaddr, unsigned int val)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;

	desc.args[0] = (u64)regaddr;
	desc.args[1] = val;
	desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, SCM_SVC_IO_ACCESS,
			    QCOM_SCM_EXTWDT_CMD, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_tcsr(struct device *dev, u32 svc_id, u32 cmd_id,
			struct qcom_scm_tcsr_req *tcsr_cmd)
{
	return -ENOTSUPP;
}

int __qcom_scm_dload(struct device *dev, u32 svc_id, u32 cmd_id, void *cmd_buf)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;
	unsigned int enable;

#define TCSR_BOOT_MISC_REG		0x193d100ull
#define DLOAD_MODE_ENABLE		0x10ull
#define DLOAD_MODE_DISABLE		0x00ull
#define DLOAD_MODE_ENABLE_WARMRESET	0x20ull

	enable = cmd_buf ? *((unsigned int *)cmd_buf) : 0;
	desc.args[0] = TCSR_BOOT_MISC_REG;
	if (enable == SET_MAGIC_WARMRESET)
		desc.args[1] = DLOAD_MODE_ENABLE_WARMRESET;
	else
		desc.args[1] = enable ? DLOAD_MODE_ENABLE : DLOAD_MODE_DISABLE;
	desc.arginfo = SCM_ARGS(2, SCM_VAL, SCM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, SCM_SVC_IO_ACCESS,
			    SCM_IO_WRITE, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_sdi(struct device *dev, u32 svc_id, u32 cmd_id)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;

	desc.args[0] = 1ull; /* Disable wdog debug */
	desc.args[1] = 1ull; /* SDI Disable */
	desc.arginfo = SCM_ARGS(2, SCM_VAL, SCM_VAL);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, QCOM_SCM_SVC_BOOT,
			    SCM_CMD_TZ_CONFIG_HW_FOR_RAM_DUMP_ID, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_mem_prot_assign(struct device *dev, struct sg_table *table,
			      u32 *source_vm_copy,
			      size_t source_vm_copy_size,
			      struct dest_vm_and_perm_info *dest_vm_copy,
			      size_t dest_vm_copy_size,
			      struct mem_prot_info *sg_table_copy,
			      size_t sg_table_copy_size,
			      u32 *resp, size_t resp_size)
{
	int ret = 0;
	int batch_start, batch_end;
	u64 batch_size;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = virt_to_phys(sg_table_copy);
	desc.args[1] = sg_table_copy_size;
	desc.args[2] = virt_to_phys(source_vm_copy);
	desc.args[3] = source_vm_copy_size;
	desc.args[4] = virt_to_phys(dest_vm_copy);
	desc.args[5] = dest_vm_copy_size;
	desc.args[6] = 0;

	desc.arginfo = SCM_ARGS(7, SCM_RO, SCM_VAL, SCM_RO, SCM_VAL,
				SCM_RO, SCM_VAL, SCM_VAL);

	dmac_flush_range(source_vm_copy,
			 (void *)source_vm_copy + source_vm_copy_size);
	dmac_flush_range(sg_table_copy,
			 (void *)sg_table_copy + sg_table_copy_size);
	dmac_flush_range(dest_vm_copy,
			 (void *)dest_vm_copy + dest_vm_copy_size);

	batch_start = 0;
	while (batch_start < table->nents) {
		/* Ensure no size zero batches */
		batch_size = sg_table_copy[batch_start].size;
		batch_end = batch_start + 1;
		while (1) {
			u64 size;

			if (batch_end >= table->nents)
				break;
			if (batch_end - batch_start
					>= BATCH_MAX_SECTIONS)
				break;

			size = sg_table_copy[batch_end].size;
			if (size + batch_size >= BATCH_MAX_SIZE)
				break;

			batch_size += size;
			batch_end++;
		}

		desc.args[0] =
			virt_to_phys(&sg_table_copy[batch_start]);
		desc.args[1] = (batch_end - batch_start) *
				sizeof(sg_table_copy[0]);

		ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, SCM_SVC_MP,
					MEM_PROT_ASSIGN_ID, &desc, &res);
		*resp = res.a1;

		if (ret) {
			pr_info("%s: Failed to assign memory protection, ret = %d\n",
				__func__, ret);
			break;
		}
		batch_start = batch_end;
	}
	return ret;
}

int __qcom_scm_mem_protect_lock(struct device *dev, struct cp2_lock_req *req,
				size_t req_size, u32 *resp, size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.args[0] = req->chunks.chunk_list;
	desc.args[1] = req->chunks.chunk_list_size;
	desc.args[2] = req->chunks.chunk_size;
	desc.args[3] = req->mem_usage;
	desc.args[4] = req->lock;
	desc.args[5] = 0;
	desc.arginfo = SCM_ARGS(6, SCM_RW, SCM_VAL, SCM_VAL, SCM_VAL,
				SCM_VAL, SCM_VAL);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, SCM_SVC_MP,
				MEM_PROTECT_LOCK_ID2_FLAT, &desc, &res);
	*resp = res.a1;

	return ret;
}

int __qcom_scm_qseecom_notify(struct device *dev,
			     struct qsee_notify_app *req, size_t req_size,
			     struct qseecom_command_scm_resp *resp,
			     size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
	desc.args[0] = req->applications_region_addr;
	desc.args[1] = req->applications_region_size;

	ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS, TZ_SVC_APP_MGR,
			   TZ_ARMv8_CMD_NOTIFY_REGION_ID, &desc, &res);

	resp->result = res.a1;
	resp->resp_type = res.a2;
	resp->data = res.a3;

	return ret;
}

int __qcom_scm_qseecom_load(struct device *dev, uint32_t smc_id,
			   uint32_t cmd_id, union qseecom_load_ireq *req,
			   size_t req_size,
			   struct qseecom_command_scm_resp *resp,
			   size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.arginfo = SCM_ARGS(3, SCM_VAL, SCM_VAL, SCM_VAL);
	desc.args[0] = req->load_lib_req.mdt_len;
	desc.args[1] = req->load_lib_req.img_len;
	desc.args[2] = req->load_lib_req.phy_addr;

	if (cmd_id == QSEOS_APP_START_COMMAND)
		ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS, TZ_SVC_APP_MGR,
				   TZ_ARMv8_CMD_LOAD_APP_ID, &desc, &res);
	else
		ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS, TZ_SVC_APP_MGR,
				   TZ_ARMv8_CMD_LOAD_LIB, &desc, &res);

	resp->result = res.a1;
	resp->resp_type = res.a2;
	resp->data = res.a3;

	return ret;
}

int __qcom_scm_qseecom_send_data(struct device *dev,
				union qseecom_client_send_data_ireq *req,
				size_t req_size,
				struct qseecom_command_scm_resp *resp,
				size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.arginfo = SCM_ARGS(5, SCM_VAL, SCM_RW, SCM_VAL, SCM_RW, SCM_VAL);
	desc.args[0] = req->v1.app_id;
	desc.args[1] = req->v1.req_ptr;
	desc.args[2] = req->v1.req_len;
	desc.args[3] = req->v1.rsp_ptr;
	desc.args[4] = req->v1.rsp_len;

	ret = qcom_scm_call(dev, TZ_OWNER_TZ_APPS, TZ_SVC_APP_ID_PLACEHOLDER,
			   TZ_ARMv8_CMD_SEND_DATA_ID, &desc, &res);

	resp->result = res.a1;
	resp->resp_type = res.a2;
	resp->data = res.a3;

	return ret;
}

int __qcom_scm_qseecom_unload(struct device *dev, uint32_t smc_id,
			     uint32_t cmd_id, struct qseecom_unload_ireq *req,
			     size_t req_size,
			     struct qseecom_command_scm_resp *resp,
			     size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	switch (cmd_id) {
	case QSEOS_APP_SHUTDOWN_COMMAND:
		desc.arginfo = SCM_ARGS(1);
		desc.args[0] = req->app_id;
		ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS,
				   TZ_SVC_APP_MGR,
				   TZ_ARMv8_CMD_UNLOAD_APP_ID,
				   &desc, &res);
		break;

	case QSEE_UNLOAD_SERV_IMAGE_COMMAND:
		ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS, TZ_SVC_APP_MGR,
				   TZ_ARMv8_CMD_UNLOAD_LIB, &desc, &res);
		break;

	default:
		pr_info("\nIncorrect command id has been passed");
		return -EINVAL;
	}

	resp->result = res.a1;
	resp->resp_type = res.a2;
	resp->data = res.a3;

	return ret;
}

int __qcom_scm_tz_register_log_buf(struct device *dev,
				  struct qsee_reg_log_buf_req *request,
				  size_t req_size,
				  struct qseecom_command_scm_resp *response,
				  size_t resp_size)
{
	int ret = 0;
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;

	desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);
	desc.args[0] = request->phy_addr;
	desc.args[1] = request->len;

	ret = qcom_scm_call(dev, TZ_OWNER_QSEE_OS, TZ_SVC_APP_MGR,
			   TZ_ARMv8_CMD_REGISTER_LOG_BUF, &desc, &res);

	response->result = res.a1;
	response->resp_type = res.a2;
	response->data = res.a3;

	return ret;
}


int __qcom_scm_tzsched(struct device *dev, const void *req, size_t req_size,
			void *resp, size_t resp_size)
{
	return -ENOTSUPP;
}

int __qcom_scm_pinmux_read(u32 svc_id, u32 cmd_id, u32 arg1)
{
	return -ENOTSUPP;
}

int __qcom_scm_pinmux_write(u32 svc_id, u32 cmd_id, u32 arg1, u32 arg2)
{
	return -ENOTSUPP;
}

int __qcom_scm_usb_mode_write(u32 svc_id, u32 cmd_id, u32 arg1, u32 arg2)
{
	return -ENOTSUPP;
}

int __qcom_scm_cache_dump(u32 cpu)
{
	return -ENOTSUPP;
}

int __qcom_scm_get_cache_dump_size(struct device *dev, u32 cmd_id,
					void *cmd_buf, u32 size)
{
	return -ENOTSUPP;
}

int __qcom_scm_send_cache_dump_addr(struct device *dev, u32 cmd_id,
					void *cmd_buf, u32 size)
{
	return -ENOTSUPP;
}

int __qcom_scm_pshold(struct device *dev)
{
	return -ENOTSUPP;
}

static int __qcom_scm_tz_hvc_log_v8(struct device *dev, u32 svc_id, u32 cmd_id,
					u32 log_buf, u32 buf_size)
{
	struct qcom_scm_desc desc = {0};
	struct arm_smccc_res res;
	int ret;

	desc.args[0] = log_buf;
	desc.args[1] = buf_size;
	desc.arginfo = SCM_ARGS(2, SCM_RW, SCM_VAL);

	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, svc_id,
			    cmd_id, &desc, &res);

	return ret ? : res.a1;
}

int __qcom_scm_hvc_log(struct device *dev, u32 svc_id, u32 cmd_id,
				void *ker_buf, u32 buf_len)
{
	int ret;
	dma_addr_t log_buf;

	log_buf = dma_map_single(dev, ker_buf, buf_len, DMA_FROM_DEVICE);
	ret = dma_mapping_error(dev, log_buf);

	if (ret != 0) {
		pr_err("DMA Mapping Error : %d\n", ret);
		return -EINVAL;
	}

	ret = __qcom_scm_tz_hvc_log_v8(dev, svc_id, cmd_id, log_buf, buf_len);
	dma_unmap_single(dev, log_buf, buf_len, DMA_FROM_DEVICE);

	return ret;
}

int __qcom_scm_tz_log(struct device *dev, u32 svc_id, u32 cmd_id,
				void *ker_buf, u32 buf_len)
{
	int ret;
	dma_addr_t log_buf;

	log_buf = dma_map_single(dev, ker_buf, buf_len, DMA_FROM_DEVICE);
	ret = dma_mapping_error(dev, log_buf);

	if (ret != 0) {
		pr_err("DMA Mapping Error : %d\n", ret);
		return -EINVAL;
	}

	ret = __qcom_scm_tz_hvc_log_v8(dev, svc_id, cmd_id, log_buf, buf_len);
	dma_unmap_single(dev, log_buf, buf_len, DMA_FROM_DEVICE);

	return ret;
}

int __qcom_los_scm_call(struct device *dev, u32 svc_id, u32 cmd_id,
					void *cmd_buf, size_t size)
{
	return -ENOTSUPP;
}

int __qcom_fuseipq_scm_call(struct device *dev, u32 svc_id, u32 cmd_id,
			    void *cmd_buf, size_t size)
{
	int ret;
	struct arm_smccc_res res;
	struct qcom_scm_desc desc = {0};
	uint64_t *status;

	desc.arginfo = SCM_ARGS(1, SCM_RO);
	desc.args[0] = *((unsigned int *)cmd_buf);
	ret = qcom_scm_call(dev, ARM_SMCCC_OWNER_SIP, svc_id,
			    cmd_id, &desc, &res);
	status = (uint64_t *)(*(((uint64_t *)cmd_buf) + 1));
	*status = res.a1;
	return ret ? : res.a1;
}