static int amd_params_to_tee_params()

in amdtee/call.c [72:122]

• 39 lines of code
• 12 McCabe index (conditional complexity)

static int amd_params_to_tee_params(struct tee_param *tee, u32 count,
				    struct tee_operation *amd)
{
	int i, ret = 0;
	u32 type;

	if (!count)
		return 0;

	if (!tee || !amd || count > TEE_MAX_PARAMS)
		return -EINVAL;

	/* Assumes amd->param_types is valid */
	for (i = 0; i < count; i++) {
		type = TEE_PARAM_TYPE_GET(amd->param_types, i);
		pr_debug("%s: type[%d] = 0x%x\n", __func__, i, type);

		if (type == TEE_OP_PARAM_TYPE_INVALID ||
		    type > TEE_OP_PARAM_TYPE_MEMREF_INOUT)
			return -EINVAL;

		if (type == TEE_OP_PARAM_TYPE_NONE ||
		    type == TEE_OP_PARAM_TYPE_VALUE_INPUT ||
		    type == TEE_OP_PARAM_TYPE_MEMREF_INPUT)
			continue;

		/*
		 * It is assumed that buf_id remains unchanged for
		 * both open_session and invoke_cmd call
		 */
		if (type > TEE_OP_PARAM_TYPE_MEMREF_INPUT) {
			tee[i].u.memref.shm_offs = amd->params[i].mref.offset;
			tee[i].u.memref.size = amd->params[i].mref.size;
			pr_debug("%s: bufid[%d] = 0x%x, offset[%d] = 0x%x, size[%d] = 0x%x\n",
				 __func__,
				 i, amd->params[i].mref.buf_id,
				 i, amd->params[i].mref.offset,
				 i, amd->params[i].mref.size);
		} else {
			/* field 'c' not supported by AMD TEE */
			tee[i].u.value.a = amd->params[i].val.a;
			tee[i].u.value.b = amd->params[i].val.b;
			tee[i].u.value.c = 0;
			pr_debug("%s: a[%d] = 0x%x, b[%d] = 0x%x\n",
				 __func__,
				 i, amd->params[i].val.a,
				 i, amd->params[i].val.b);
		}
	}
	return ret;
}