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Date:   Tue, 5 Nov 2019 22:05:48 -0800
From:   Bjorn Andersson <bjorn.andersson@linaro.org>
To:     Elliot Berman <eberman@codeaurora.org>
Cc:     saiprakash.ranjan@codeaurora.org, agross@kernel.org,
        tsoni@codeaurora.org, sidgup@codeaurora.org,
        psodagud@codeaurora.org, linux-arm-msm@vger.kernel.org,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH 03/17] firmware: qcom_scm: Order functions, definitions
 by service/command
Message-ID: <20191106060548.GG586@tuxbook-pro>
References: <1572917256-24205-1-git-send-email-eberman@codeaurora.org>
 <1572917256-24205-4-git-send-email-eberman@codeaurora.org>
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User-Agent: Mutt/1.12.1 (2019-06-15)
Sender: linux-kernel-owner@vger.kernel.org
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On Mon 04 Nov 17:27 PST 2019, Elliot Berman wrote:

> Definitions throughout qcom_scm are loosely grouped and loosely ordered.
> Sort all the functions/definitions by service ID/command ID to improve
> sanity when needing to add new functionality to this driver.
> 
> Signed-off-by: Elliot Berman <eberman@codeaurora.org>

Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>

> ---
>  drivers/firmware/qcom_scm-32.c | 104 +++++++++----------
>  drivers/firmware/qcom_scm-64.c | 192 +++++++++++++++++------------------
>  drivers/firmware/qcom_scm.c    | 224 ++++++++++++++++++++---------------------
>  drivers/firmware/qcom_scm.h    | 107 ++++++++++----------
>  include/linux/qcom_scm.h       |  72 ++++++-------
>  5 files changed, 350 insertions(+), 349 deletions(-)
> 
> diff --git a/drivers/firmware/qcom_scm-32.c b/drivers/firmware/qcom_scm-32.c
> index 87b520f..b09fddf 100644
> --- a/drivers/firmware/qcom_scm-32.c
> +++ b/drivers/firmware/qcom_scm-32.c
> @@ -419,33 +419,28 @@ void __qcom_scm_cpu_power_down(u32 flags)
>  			flags & QCOM_SCM_FLUSH_FLAG_MASK);
>  }
>  
> -int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
> +int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
>  {
> +	struct {
> +		__le32 state;
> +		__le32 id;
> +	} req;
> +	__le32 scm_ret = 0;
>  	int ret;
> -	__le32 svc_cmd = cpu_to_le32((svc_id << 10) | cmd_id);
> -	__le32 ret_val = 0;
> -
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL,
> -			    &svc_cmd, sizeof(svc_cmd), &ret_val,
> -			    sizeof(ret_val));
> -	if (ret)
> -		return ret;
>  
> -	return le32_to_cpu(ret_val);
> -}
> +	req.state = cpu_to_le32(state);
> +	req.id = cpu_to_le32(id);
>  
> -int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
> -			u32 req_cnt, u32 *resp)
> -{
> -	if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
> -		return -ERANGE;
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_REMOTE_STATE,
> +			    &req, sizeof(req), &scm_ret, sizeof(scm_ret));
>  
> -	return qcom_scm_call(dev, QCOM_SCM_SVC_HDCP, QCOM_SCM_HDCP_INVOKE,
> -		req, req_cnt * sizeof(*req), resp, sizeof(*resp));
> +	return ret ? : le32_to_cpu(scm_ret);
>  }
>  
> -void __qcom_scm_init(void)
> +int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
>  {
> +	return qcom_scm_call_atomic2(QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_DLOAD_MODE,
> +				     enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0, 0);
>  }
>  
>  bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
> @@ -550,35 +545,37 @@ int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
>  	return ret ? : le32_to_cpu(out);
>  }
>  
> -int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
> -{
> -	return qcom_scm_call_atomic2(QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_DLOAD_MODE,
> -				     enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0, 0);
> -}
> -
> -int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
> +int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
> +			unsigned int *val)
>  {
> -	struct {
> -		__le32 state;
> -		__le32 id;
> -	} req;
> -	__le32 scm_ret = 0;
>  	int ret;
>  
> -	req.state = cpu_to_le32(state);
> -	req.id = cpu_to_le32(id);
> +	ret = qcom_scm_call_atomic1(QCOM_SCM_SVC_IO, QCOM_SCM_IO_READ, addr);
> +	if (ret >= 0)
> +		*val = ret;
>  
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_REMOTE_STATE,
> -			    &req, sizeof(req), &scm_ret, sizeof(scm_ret));
> +	return ret < 0 ? ret : 0;
> +}
>  
> -	return ret ? : le32_to_cpu(scm_ret);
> +int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
> +{
> +	return qcom_scm_call_atomic2(QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE,
> +				     addr, val);
>  }
>  
> -int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
> -			  size_t mem_sz, phys_addr_t src, size_t src_sz,
> -			  phys_addr_t dest, size_t dest_sz)
> +int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
>  {
> -	return -ENODEV;
> +	int ret;
> +	__le32 svc_cmd = cpu_to_le32((svc_id << 10) | cmd_id);
> +	__le32 ret_val = 0;
> +
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL,
> +			    &svc_cmd, sizeof(svc_cmd), &ret_val,
> +			    sizeof(ret_val));
> +	if (ret)
> +		return ret;
> +
> +	return le32_to_cpu(ret_val);
>  }
>  
>  int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
> @@ -599,25 +596,28 @@ int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
>  	return -ENODEV;
>  }
>  
> -int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
> -			unsigned int *val)
> +int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
> +			  size_t mem_sz, phys_addr_t src, size_t src_sz,
> +			  phys_addr_t dest, size_t dest_sz)
>  {
> -	int ret;
> -
> -	ret = qcom_scm_call_atomic1(QCOM_SCM_SVC_IO, QCOM_SCM_IO_READ, addr);
> -	if (ret >= 0)
> -		*val = ret;
> -
> -	return ret < 0 ? ret : 0;
> +	return -ENODEV;
>  }
>  
> -int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
> +int __qcom_scm_hdcp_req(struct device *dev, struct qcom_scm_hdcp_req *req,
> +			u32 req_cnt, u32 *resp)
>  {
> -	return qcom_scm_call_atomic2(QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE,
> -				     addr, val);
> +	if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
> +		return -ERANGE;
> +
> +	return qcom_scm_call(dev, QCOM_SCM_SVC_HDCP, QCOM_SCM_HDCP_INVOKE,
> +		req, req_cnt * sizeof(*req), resp, sizeof(*resp));
>  }
>  
>  int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool enable)
>  {
>  	return -ENODEV;
>  }
> +
> +void __qcom_scm_init(void)
> +{
> +}
> \ No newline at end of file
> diff --git a/drivers/firmware/qcom_scm-64.c b/drivers/firmware/qcom_scm-64.c
> index f0b4853..ead0b5f 100644
> --- a/drivers/firmware/qcom_scm-64.c
> +++ b/drivers/firmware/qcom_scm-64.c
> @@ -246,68 +246,33 @@ void __qcom_scm_cpu_power_down(u32 flags)
>  {
>  }
>  
> -int __qcom_scm_is_call_available(struct device *dev, u32 svc_id, u32 cmd_id)
> +int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
>  {
> -	int ret;
>  	struct qcom_scm_desc desc = {0};
>  	struct arm_smccc_res res;
> +	int ret;
>  
> -	desc.arginfo = QCOM_SCM_ARGS(1);
> -	desc.args[0] = SMCCC_FUNCNUM(svc_id, cmd_id) |
> -			(ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);
> +	desc.args[0] = state;
> +	desc.args[1] = id;
> +	desc.arginfo = QCOM_SCM_ARGS(2);
>  
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL,
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_REMOTE_STATE,
>  			    &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 __qcom_scm_set_dload_mode(struct device *dev, bool enable)
>  {
> -	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, QCOM_SCM_SVC_HDCP, QCOM_SCM_HDCP_INVOKE, &desc,
> -			    &res);
> -	*resp = res.a1;
> -
> -	return ret;
> -}
> -
> -void __qcom_scm_init(void)
> -{
> -	u64 cmd;
> -	struct arm_smccc_res res;
> -	u32 function = SMCCC_FUNCNUM(QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL);
> -
> -	/* 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);
> +	desc.args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE;
> +	desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
> +	desc.arginfo = QCOM_SCM_ARGS(2);
>  
> -	if (!res.a0 && res.a1)
> -		qcom_smccc_convention = ARM_SMCCC_SMC_64;
> -	else
> -		qcom_smccc_convention = ARM_SMCCC_SMC_32;
> +	return qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_DLOAD_MODE,
> +			     &desc, &res);
>  }
>  
>  bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral)
> @@ -408,44 +373,48 @@ int __qcom_scm_pas_mss_reset(struct device *dev, bool reset)
>  	return ret ? : res.a1;
>  }
>  
> -int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id)
> +int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
> +			unsigned int *val)
>  {
>  	struct qcom_scm_desc desc = {0};
>  	struct arm_smccc_res res;
>  	int ret;
>  
> -	desc.args[0] = state;
> -	desc.args[1] = id;
> -	desc.arginfo = QCOM_SCM_ARGS(2);
> +	desc.args[0] = addr;
> +	desc.arginfo = QCOM_SCM_ARGS(1);
>  
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_REMOTE_STATE,
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_READ,
>  			    &desc, &res);
> +	if (ret >= 0)
> +		*val = res.a1;
>  
> -	return ret ? : res.a1;
> +	return ret < 0 ? ret : 0;
>  }
>  
> -int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
> -			  size_t mem_sz, phys_addr_t src, size_t src_sz,
> -			  phys_addr_t dest, size_t dest_sz)
> +int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
>  {
> -	int ret;
>  	struct qcom_scm_desc desc = {0};
>  	struct arm_smccc_res res;
>  
> -	desc.args[0] = mem_region;
> -	desc.args[1] = mem_sz;
> -	desc.args[2] = src;
> -	desc.args[3] = src_sz;
> -	desc.args[4] = dest;
> -	desc.args[5] = dest_sz;
> -	desc.args[6] = 0;
> +	desc.args[0] = addr;
> +	desc.args[1] = val;
> +	desc.arginfo = QCOM_SCM_ARGS(2);
>  
> -	desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL,
> -				     QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO,
> -				     QCOM_SCM_VAL, QCOM_SCM_VAL);
> +	return qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE,
> +			     &desc, &res);
> +}
>  
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
> -			    QCOM_SCM_MP_ASSIGN,
> +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] = SMCCC_FUNCNUM(svc_id, cmd_id) |
> +			(ARM_SMCCC_OWNER_SIP << ARM_SMCCC_OWNER_SHIFT);
> +
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL,
>  			    &desc, &res);
>  
>  	return ret ? : res.a1;
> @@ -509,48 +478,60 @@ int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr, u32 size,
>  	return ret;
>  }
>  
> -int __qcom_scm_set_dload_mode(struct device *dev, bool enable)
> +int __qcom_scm_assign_mem(struct device *dev, phys_addr_t mem_region,
> +			  size_t mem_sz, phys_addr_t src, size_t src_sz,
> +			  phys_addr_t dest, size_t dest_sz)
>  {
> +	int ret;
>  	struct qcom_scm_desc desc = {0};
>  	struct arm_smccc_res res;
>  
> -	desc.args[0] = QCOM_SCM_BOOT_SET_DLOAD_MODE;
> -	desc.args[1] = enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0;
> -	desc.arginfo = QCOM_SCM_ARGS(2);
> -
> -	return qcom_scm_call(dev, QCOM_SCM_SVC_BOOT, QCOM_SCM_BOOT_SET_DLOAD_MODE,
> -			     &desc, &res);
> -}
> -
> -int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr,
> -			unsigned int *val)
> -{
> -	struct qcom_scm_desc desc = {0};
> -	struct arm_smccc_res res;
> -	int ret;
> +	desc.args[0] = mem_region;
> +	desc.args[1] = mem_sz;
> +	desc.args[2] = src;
> +	desc.args[3] = src_sz;
> +	desc.args[4] = dest;
> +	desc.args[5] = dest_sz;
> +	desc.args[6] = 0;
>  
> -	desc.args[0] = addr;
> -	desc.arginfo = QCOM_SCM_ARGS(1);
> +	desc.arginfo = QCOM_SCM_ARGS(7, QCOM_SCM_RO, QCOM_SCM_VAL,
> +				     QCOM_SCM_RO, QCOM_SCM_VAL, QCOM_SCM_RO,
> +				     QCOM_SCM_VAL, QCOM_SCM_VAL);
>  
> -	ret = qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_READ,
> +	ret = qcom_scm_call(dev, QCOM_SCM_SVC_MP,
> +			    QCOM_SCM_MP_ASSIGN,
>  			    &desc, &res);
> -	if (ret >= 0)
> -		*val = res.a1;
>  
> -	return ret < 0 ? ret : 0;
> +	return ret ? : res.a1;
>  }
>  
> -int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val)
> +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;
>  
> -	desc.args[0] = addr;
> -	desc.args[1] = val;
> -	desc.arginfo = QCOM_SCM_ARGS(2);
> +	if (req_cnt > QCOM_SCM_HDCP_MAX_REQ_CNT)
> +		return -ERANGE;
>  
> -	return qcom_scm_call(dev, QCOM_SCM_SVC_IO, QCOM_SCM_IO_WRITE,
> -			     &desc, &res);
> +	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, QCOM_SCM_SVC_HDCP, QCOM_SCM_HDCP_INVOKE, &desc,
> +			    &res);
> +	*resp = res.a1;
> +
> +	return ret;
>  }
>  
>  int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool en)
> @@ -565,3 +546,22 @@ int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev, bool en)
>  	return qcom_scm_call_atomic(dev, QCOM_SCM_SVC_SMMU_PROGRAM,
>  				    QCOM_SCM_SMMU_CONFIG_ERRATA1, &desc, &res);
>  }
> +
> +void __qcom_scm_init(void)
> +{
> +	u64 cmd;
> +	struct arm_smccc_res res;
> +	u32 function = SMCCC_FUNCNUM(QCOM_SCM_SVC_INFO, QCOM_SCM_INFO_IS_CALL_AVAIL);
> +
> +	/* 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;
> +}
> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
> index 450d6d6..83fc049 100644
> --- a/drivers/firmware/qcom_scm.c
> +++ b/drivers/firmware/qcom_scm.c
> @@ -127,47 +127,33 @@ void qcom_scm_cpu_power_down(u32 flags)
>  }
>  EXPORT_SYMBOL(qcom_scm_cpu_power_down);
>  
> -/**
> - * qcom_scm_hdcp_available() - Check if secure environment supports HDCP.
> - *
> - * Return true if HDCP is supported, false if not.
> - */
> -bool qcom_scm_hdcp_available(void)
> +int qcom_scm_set_remote_state(u32 state, u32 id)
>  {
> -	int ret = qcom_scm_clk_enable();
> -
> -	if (ret)
> -		return ret;
> -
> -	ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_HDCP,
> -						QCOM_SCM_HDCP_INVOKE);
> -
> -	qcom_scm_clk_disable();
> -
> -	return ret > 0 ? true : false;
> +	return __qcom_scm_set_remote_state(__scm->dev, state, id);
>  }
> -EXPORT_SYMBOL(qcom_scm_hdcp_available);
> +EXPORT_SYMBOL(qcom_scm_set_remote_state);
>  
> -/**
> - * qcom_scm_hdcp_req() - Send HDCP request.
> - * @req: HDCP request array
> - * @req_cnt: HDCP request array count
> - * @resp: response buffer passed to SCM
> - *
> - * Write HDCP register(s) through SCM.
> - */
> -int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
> +static void qcom_scm_set_download_mode(bool enable)
>  {
> -	int ret = qcom_scm_clk_enable();
> +	bool avail;
> +	int ret = 0;
>  
> -	if (ret)
> -		return ret;
> +	avail = __qcom_scm_is_call_available(__scm->dev,
> +					     QCOM_SCM_SVC_BOOT,
> +					     QCOM_SCM_BOOT_SET_DLOAD_MODE);
> +	if (avail) {
> +		ret = __qcom_scm_set_dload_mode(__scm->dev, enable);
> +	} else if (__scm->dload_mode_addr) {
> +		ret = __qcom_scm_io_writel(__scm->dev, __scm->dload_mode_addr,
> +					   enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0);
> +	} else {
> +		dev_err(__scm->dev,
> +			"No available mechanism for setting download mode\n");
> +	}
>  
> -	ret = __qcom_scm_hdcp_req(__scm->dev, req, req_cnt, resp);
> -	qcom_scm_clk_disable();
> -	return ret;
> +	if (ret)
> +		dev_err(__scm->dev, "failed to set download mode: %d\n", ret);
>  }
> -EXPORT_SYMBOL(qcom_scm_hdcp_req);
>  
>  /**
>   * qcom_scm_pas_supported() - Check if the peripheral authentication service is
> @@ -325,30 +311,6 @@ static const struct reset_control_ops qcom_scm_pas_reset_ops = {
>  	.deassert = qcom_scm_pas_reset_deassert,
>  };
>  
> -int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
> -{
> -	return __qcom_scm_restore_sec_cfg(__scm->dev, device_id, spare);
> -}
> -EXPORT_SYMBOL(qcom_scm_restore_sec_cfg);
> -
> -int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
> -{
> -	return __qcom_scm_iommu_secure_ptbl_size(__scm->dev, spare, size);
> -}
> -EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_size);
> -
> -int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
> -{
> -	return __qcom_scm_iommu_secure_ptbl_init(__scm->dev, addr, size, spare);
> -}
> -EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init);
> -
> -int qcom_scm_qsmmu500_wait_safe_toggle(bool en)
> -{
> -	return __qcom_scm_qsmmu500_wait_safe_toggle(__scm->dev, en);
> -}
> -EXPORT_SYMBOL(qcom_scm_qsmmu500_wait_safe_toggle);
> -
>  int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val)
>  {
>  	return __qcom_scm_io_readl(__scm->dev, addr, val);
> @@ -361,68 +323,23 @@ int qcom_scm_io_writel(phys_addr_t addr, unsigned int val)
>  }
>  EXPORT_SYMBOL(qcom_scm_io_writel);
>  
> -static void qcom_scm_set_download_mode(bool enable)
> -{
> -	bool avail;
> -	int ret = 0;
> -
> -	avail = __qcom_scm_is_call_available(__scm->dev,
> -					     QCOM_SCM_SVC_BOOT,
> -					     QCOM_SCM_BOOT_SET_DLOAD_MODE);
> -	if (avail) {
> -		ret = __qcom_scm_set_dload_mode(__scm->dev, enable);
> -	} else if (__scm->dload_mode_addr) {
> -		ret = __qcom_scm_io_writel(__scm->dev, __scm->dload_mode_addr,
> -					   enable ? QCOM_SCM_BOOT_SET_DLOAD_MODE : 0);
> -	} else {
> -		dev_err(__scm->dev,
> -			"No available mechanism for setting download mode\n");
> -	}
> -
> -	if (ret)
> -		dev_err(__scm->dev, "failed to set download mode: %d\n", ret);
> -}
> -
> -static int qcom_scm_find_dload_address(struct device *dev, u64 *addr)
> +int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
>  {
> -	struct device_node *tcsr;
> -	struct device_node *np = dev->of_node;
> -	struct resource res;
> -	u32 offset;
> -	int ret;
> -
> -	tcsr = of_parse_phandle(np, "qcom,dload-mode", 0);
> -	if (!tcsr)
> -		return 0;
> -
> -	ret = of_address_to_resource(tcsr, 0, &res);
> -	of_node_put(tcsr);
> -	if (ret)
> -		return ret;
> -
> -	ret = of_property_read_u32_index(np, "qcom,dload-mode", 1, &offset);
> -	if (ret < 0)
> -		return ret;
> -
> -	*addr = res.start + offset;
> -
> -	return 0;
> +	return __qcom_scm_restore_sec_cfg(__scm->dev, device_id, spare);
>  }
> +EXPORT_SYMBOL(qcom_scm_restore_sec_cfg);
>  
> -/**
> - * qcom_scm_is_available() - Checks if SCM is available
> - */
> -bool qcom_scm_is_available(void)
> +int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
>  {
> -	return !!__scm;
> +	return __qcom_scm_iommu_secure_ptbl_size(__scm->dev, spare, size);
>  }
> -EXPORT_SYMBOL(qcom_scm_is_available);
> +EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_size);
>  
> -int qcom_scm_set_remote_state(u32 state, u32 id)
> +int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
>  {
> -	return __qcom_scm_set_remote_state(__scm->dev, state, id);
> +	return __qcom_scm_iommu_secure_ptbl_init(__scm->dev, addr, size, spare);
>  }
> -EXPORT_SYMBOL(qcom_scm_set_remote_state);
> +EXPORT_SYMBOL(qcom_scm_iommu_secure_ptbl_init);
>  
>  /**
>   * qcom_scm_assign_mem() - Make a secure call to reassign memory ownership
> @@ -506,6 +423,89 @@ int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>  }
>  EXPORT_SYMBOL(qcom_scm_assign_mem);
>  
> +/**
> + * qcom_scm_hdcp_available() - Check if secure environment supports HDCP.
> + *
> + * Return true if HDCP is supported, false if not.
> + */
> +bool qcom_scm_hdcp_available(void)
> +{
> +	int ret = qcom_scm_clk_enable();
> +
> +	if (ret)
> +		return ret;
> +
> +	ret = __qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_HDCP,
> +						QCOM_SCM_HDCP_INVOKE);
> +
> +	qcom_scm_clk_disable();
> +
> +	return ret > 0 ? true : false;
> +}
> +EXPORT_SYMBOL(qcom_scm_hdcp_available);
> +
> +/**
> + * qcom_scm_hdcp_req() - Send HDCP request.
> + * @req: HDCP request array
> + * @req_cnt: HDCP request array count
> + * @resp: response buffer passed to SCM
> + *
> + * Write HDCP register(s) through SCM.
> + */
> +int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp)
> +{
> +	int ret = qcom_scm_clk_enable();
> +
> +	if (ret)
> +		return ret;
> +
> +	ret = __qcom_scm_hdcp_req(__scm->dev, req, req_cnt, resp);
> +	qcom_scm_clk_disable();
> +	return ret;
> +}
> +EXPORT_SYMBOL(qcom_scm_hdcp_req);
> +
> +int qcom_scm_qsmmu500_wait_safe_toggle(bool en)
> +{
> +	return __qcom_scm_qsmmu500_wait_safe_toggle(__scm->dev, en);
> +}
> +EXPORT_SYMBOL(qcom_scm_qsmmu500_wait_safe_toggle);
> +
> +/**
> + * qcom_scm_is_available() - Checks if SCM is available
> + */
> +bool qcom_scm_is_available(void)
> +{
> +	return !!__scm;
> +}
> +EXPORT_SYMBOL(qcom_scm_is_available);
> +
> +static int qcom_scm_find_dload_address(struct device *dev, u64 *addr)
> +{
> +	struct device_node *tcsr;
> +	struct device_node *np = dev->of_node;
> +	struct resource res;
> +	u32 offset;
> +	int ret;
> +
> +	tcsr = of_parse_phandle(np, "qcom,dload-mode", 0);
> +	if (!tcsr)
> +		return 0;
> +
> +	ret = of_address_to_resource(tcsr, 0, &res);
> +	of_node_put(tcsr);
> +	if (ret)
> +		return ret;
> +
> +	ret = of_property_read_u32_index(np, "qcom,dload-mode", 1, &offset);
> +	if (ret < 0)
> +		return ret;
> +
> +	*addr = res.start + offset;
> +
> +	return 0;
> +}
> +
>  static int qcom_scm_probe(struct platform_device *pdev)
>  {
>  	struct qcom_scm *scm;
> diff --git a/drivers/firmware/qcom_scm.h b/drivers/firmware/qcom_scm.h
> index 99e91ba..4be482f 100644
> --- a/drivers/firmware/qcom_scm.h
> +++ b/drivers/firmware/qcom_scm.h
> @@ -4,54 +4,74 @@
>  #ifndef __QCOM_SCM_INT_H
>  #define __QCOM_SCM_INT_H
>  
> -#define QCOM_SCM_SVC_BOOT		0x1
> -#define QCOM_SCM_BOOT_SET_ADDR		0x1
> +#define QCOM_SCM_SVC_BOOT			0x01
> +#define QCOM_SCM_BOOT_SET_ADDR			0x01
> +#define QCOM_SCM_BOOT_TERMINATE_PC		0x02
> +#define QCOM_SCM_BOOT_SET_REMOTE_STATE		0x0a
>  #define QCOM_SCM_BOOT_SET_DLOAD_MODE		0x10
> -#define QCOM_SCM_BOOT_SET_REMOTE_STATE	0xa
> -extern int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id);
> -extern int __qcom_scm_set_dload_mode(struct device *dev, bool enable);
> -
> +extern int __qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
>  extern int __qcom_scm_set_warm_boot_addr(struct device *dev, void *entry,
>  		const cpumask_t *cpus);
> -extern int __qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
> -
> -#define QCOM_SCM_BOOT_TERMINATE_PC	0x2
> -#define QCOM_SCM_FLUSH_FLAG_MASK	0x3
>  extern void __qcom_scm_cpu_power_down(u32 flags);
> +extern int __qcom_scm_set_remote_state(struct device *dev, u32 state, u32 id);
> +extern int __qcom_scm_set_dload_mode(struct device *dev, bool enable);
> +#define QCOM_SCM_FLUSH_FLAG_MASK	0x3
> +
> +#define QCOM_SCM_SVC_PIL			0x02
> +#define QCOM_SCM_PIL_PAS_INIT_IMAGE		0x01
> +#define QCOM_SCM_PIL_PAS_MEM_SETUP		0x02
> +#define QCOM_SCM_PIL_PAS_AUTH_AND_RESET		0x05
> +#define QCOM_SCM_PIL_PAS_SHUTDOWN		0x06
> +#define QCOM_SCM_PIL_PAS_IS_SUPPORTED		0x07
> +#define QCOM_SCM_PIL_PAS_MSS_RESET		0x0a
> +extern bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral);
> +extern int  __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
> +		dma_addr_t metadata_phys);
> +extern int  __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
> +		phys_addr_t addr, phys_addr_t size);
> +extern int  __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral);
> +extern int  __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral);
> +extern int  __qcom_scm_pas_mss_reset(struct device *dev, bool reset);
>  
> -#define QCOM_SCM_SVC_IO			0x5
> -#define QCOM_SCM_IO_READ		0x1
> -#define QCOM_SCM_IO_WRITE		0x2
> +#define QCOM_SCM_SVC_IO				0x05
> +#define QCOM_SCM_IO_READ			0x01
> +#define QCOM_SCM_IO_WRITE			0x02
>  extern int __qcom_scm_io_readl(struct device *dev, phys_addr_t addr, unsigned int *val);
>  extern int __qcom_scm_io_writel(struct device *dev, phys_addr_t addr, unsigned int val);
>  
> -#define QCOM_SCM_SVC_INFO		0x6
> -#define QCOM_SCM_INFO_IS_CALL_AVAIL	0x1
> +#define QCOM_SCM_SVC_INFO			0x06
> +#define QCOM_SCM_INFO_IS_CALL_AVAIL		0x01
>  extern int __qcom_scm_is_call_available(struct device *dev, u32 svc_id,
>  		u32 cmd_id);
>  
> -#define QCOM_SCM_SVC_HDCP		0x11
> -#define QCOM_SCM_HDCP_INVOKE		0x01
> +#define QCOM_SCM_SVC_MP				0x0c
> +#define QCOM_SCM_MP_RESTORE_SEC_CFG		0x02
> +#define QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE	0x03
> +#define QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT	0x04
> +#define QCOM_SCM_MP_ASSIGN			0x16
> +extern int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
> +				      u32 spare);
> +extern int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
> +					     size_t *size);
> +extern int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr,
> +					     u32 size, u32 spare);
> +extern int  __qcom_scm_assign_mem(struct device *dev,
> +				  phys_addr_t mem_region, size_t mem_sz,
> +				  phys_addr_t src, size_t src_sz,
> +				  phys_addr_t dest, size_t dest_sz);
> +
> +#define QCOM_SCM_SVC_HDCP			0x11
> +#define QCOM_SCM_HDCP_INVOKE			0x01
>  extern int __qcom_scm_hdcp_req(struct device *dev,
>  		struct qcom_scm_hdcp_req *req, u32 req_cnt, u32 *resp);
>  
> -extern void __qcom_scm_init(void);
> +#define QCOM_SCM_SVC_SMMU_PROGRAM		0x15
> +#define QCOM_SCM_SMMU_CONFIG_ERRATA1		0x3
> +extern int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev,
> +						bool enable);
> +#define QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL	0x2
>  
> -#define QCOM_SCM_SVC_PIL		0x2
> -#define QCOM_SCM_PIL_PAS_INIT_IMAGE	0x1
> -#define QCOM_SCM_PIL_PAS_MEM_SETUP	0x2
> -#define QCOM_SCM_PIL_PAS_AUTH_AND_RESET	0x5
> -#define QCOM_SCM_PIL_PAS_SHUTDOWN	0x6
> -#define QCOM_SCM_PIL_PAS_IS_SUPPORTED	0x7
> -#define QCOM_SCM_PIL_PAS_MSS_RESET		0xa
> -extern bool __qcom_scm_pas_supported(struct device *dev, u32 peripheral);
> -extern int  __qcom_scm_pas_init_image(struct device *dev, u32 peripheral,
> -		dma_addr_t metadata_phys);
> -extern int  __qcom_scm_pas_mem_setup(struct device *dev, u32 peripheral,
> -		phys_addr_t addr, phys_addr_t size);
> -extern int  __qcom_scm_pas_auth_and_reset(struct device *dev, u32 peripheral);
> -extern int  __qcom_scm_pas_shutdown(struct device *dev, u32 peripheral);
> -extern int  __qcom_scm_pas_mss_reset(struct device *dev, bool reset);
> +extern void __qcom_scm_init(void);
>  
>  /* common error codes */
>  #define QCOM_SCM_V2_EBUSY	-12
> @@ -80,25 +100,4 @@ static inline int qcom_scm_remap_error(int err)
>  	return -EINVAL;
>  }
>  
> -#define QCOM_SCM_SVC_MP			0xc
> -#define QCOM_SCM_MP_RESTORE_SEC_CFG	2
> -extern int __qcom_scm_restore_sec_cfg(struct device *dev, u32 device_id,
> -				      u32 spare);
> -#define QCOM_SCM_MP_IOMMU_SECURE_PTBL_SIZE	3
> -#define QCOM_SCM_MP_IOMMU_SECURE_PTBL_INIT	4
> -#define QCOM_SCM_SVC_SMMU_PROGRAM	0x15
> -#define QCOM_SCM_SMMU_CONFIG_ERRATA1		0x3
> -#define QCOM_SCM_SMMU_CONFIG_ERRATA1_CLIENT_ALL	0x2
> -extern int __qcom_scm_iommu_secure_ptbl_size(struct device *dev, u32 spare,
> -					     size_t *size);
> -extern int __qcom_scm_iommu_secure_ptbl_init(struct device *dev, u64 addr,
> -					     u32 size, u32 spare);
> -extern int __qcom_scm_qsmmu500_wait_safe_toggle(struct device *dev,
> -						bool enable);
> -#define QCOM_SCM_MP_ASSIGN	0x16
> -extern int  __qcom_scm_assign_mem(struct device *dev,
> -				  phys_addr_t mem_region, size_t mem_sz,
> -				  phys_addr_t src, size_t src_sz,
> -				  phys_addr_t dest, size_t dest_sz);
> -
>  #endif
> diff --git a/include/linux/qcom_scm.h b/include/linux/qcom_scm.h
> index ffd72b3..f8b6525 100644
> --- a/include/linux/qcom_scm.h
> +++ b/include/linux/qcom_scm.h
> @@ -37,10 +37,8 @@ struct qcom_scm_vmperm {
>  #if IS_ENABLED(CONFIG_QCOM_SCM)
>  extern int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus);
>  extern int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus);
> -extern bool qcom_scm_is_available(void);
> -extern bool qcom_scm_hdcp_available(void);
> -extern int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
> -			     u32 *resp);
> +extern void qcom_scm_cpu_power_down(u32 flags);
> +extern int qcom_scm_set_remote_state(u32 state, u32 id);
>  extern bool qcom_scm_pas_supported(u32 peripheral);
>  extern int qcom_scm_pas_init_image(u32 peripheral, const void *metadata,
>  				   size_t size);
> @@ -48,58 +46,62 @@ extern int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
>  				  phys_addr_t size);
>  extern int qcom_scm_pas_auth_and_reset(u32 peripheral);
>  extern int qcom_scm_pas_shutdown(u32 peripheral);
> -extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
> -			       unsigned int *src,
> -			       const struct qcom_scm_vmperm *newvm,
> -			       unsigned int dest_cnt);
> -extern void qcom_scm_cpu_power_down(u32 flags);
> -extern u32 qcom_scm_get_version(void);
> -extern int qcom_scm_set_remote_state(u32 state, u32 id);
> +extern int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val);
> +extern int qcom_scm_io_writel(phys_addr_t addr, unsigned int val);
>  extern int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare);
>  extern int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size);
>  extern int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare);
> +extern int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
> +			       unsigned int *src,
> +			       const struct qcom_scm_vmperm *newvm,
> +			       int dest_cnt);
> +extern bool qcom_scm_hdcp_available(void);
> +extern int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
> +			     u32 *resp);
>  extern int qcom_scm_qsmmu500_wait_safe_toggle(bool en);
> -extern int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val);
> -extern int qcom_scm_io_writel(phys_addr_t addr, unsigned int val);
> +extern u32 qcom_scm_get_version(void);
> +extern bool qcom_scm_is_available(void);
>  #else
>  
>  #include <linux/errno.h>
>  
>  static inline
>  int qcom_scm_set_cold_boot_addr(void *entry, const cpumask_t *cpus)
> -{
> -	return -ENODEV;
> -}
> +		{ return -ENODEV; }
>  static inline
>  int qcom_scm_set_warm_boot_addr(void *entry, const cpumask_t *cpus)
> -{
> -	return -ENODEV;
> -}
> -static inline bool qcom_scm_is_available(void) { return false; }
> -static inline bool qcom_scm_hdcp_available(void) { return false; }
> -static inline int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
> -				    u32 *resp) { return -ENODEV; }
> +		{ return -ENODEV; }
> +static inline void qcom_scm_cpu_power_down(u32 flags) {}
> +static inline u32 qcom_scm_set_remote_state(u32 state, u32 id)
> +		{ return -ENODEV; }
>  static inline bool qcom_scm_pas_supported(u32 peripheral) { return false; }
>  static inline int qcom_scm_pas_init_image(u32 peripheral, const void *metadata,
>  					  size_t size) { return -ENODEV; }
>  static inline int qcom_scm_pas_mem_setup(u32 peripheral, phys_addr_t addr,
>  					 phys_addr_t size) { return -ENODEV; }
> -static inline int
> -qcom_scm_pas_auth_and_reset(u32 peripheral) { return -ENODEV; }
> +static inline int qcom_scm_pas_auth_and_reset(u32 peripheral)
> +		{ return -ENODEV; }
>  static inline int qcom_scm_pas_shutdown(u32 peripheral) { return -ENODEV; }
> +static inline int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val)
> +		{ return -ENODEV; }
> +static inline int qcom_scm_io_writel(phys_addr_t addr, unsigned int val)
> +		{ return -ENODEV; }
> +static inline int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare)
> +		{ return -ENODEV; }
> +static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size)
> +		{ return -ENODEV; }
> +static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare)
> +		{ return -ENODEV; }
>  static inline int qcom_scm_assign_mem(phys_addr_t mem_addr, size_t mem_sz,
>  				      unsigned int *src,
>  				      const struct qcom_scm_vmperm *newvm,
> -				      unsigned int dest_cnt) { return -ENODEV; }
> -static inline void qcom_scm_cpu_power_down(u32 flags) {}
> +				      int dest_cnt) { return -ENODEV; }
> +static inline bool qcom_scm_hdcp_available(void) { return false; }
> +static inline int qcom_scm_hdcp_req(struct qcom_scm_hdcp_req *req, u32 req_cnt,
> +				    u32 *resp) { return -ENODEV; }
> +static inline int qcom_scm_qsmmu500_wait_safe_toggle(bool en)
> +		{ return -ENODEV; }
>  static inline u32 qcom_scm_get_version(void) { return 0; }
> -static inline u32
> -qcom_scm_set_remote_state(u32 state,u32 id) { return -ENODEV; }
> -static inline int qcom_scm_restore_sec_cfg(u32 device_id, u32 spare) { return -ENODEV; }
> -static inline int qcom_scm_iommu_secure_ptbl_size(u32 spare, size_t *size) { return -ENODEV; }
> -static inline int qcom_scm_iommu_secure_ptbl_init(u64 addr, u32 size, u32 spare) { return -ENODEV; }
> -static inline int qcom_scm_qsmmu500_wait_safe_toggle(bool en) { return -ENODEV; }
> -static inline int qcom_scm_io_readl(phys_addr_t addr, unsigned int *val) { return -ENODEV; }
> -static inline int qcom_scm_io_writel(phys_addr_t addr, unsigned int val) { return -ENODEV; }
> +static inline bool qcom_scm_is_available(void) { return false; }
>  #endif
>  #endif
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
>