Re: [PATCH v4 07/11] firmware: qcom_scm: ipq5332: add msa lock/unlock support

[Manikanta Mylavarapu <quic_mmanikan@quicinc.com>]

On 7/29/2023 6:00 AM, Guru Das Srinagesh wrote:
> On Jul 28 2023 12:04, Manikanta Mylavarapu wrote:
>> IPQ5332 user pd remoteproc firmwares need to be locked
>> with MSA(modem secure access) features. This patch add
>> support to lock/unlock MSA features.
>>
>> Signed-off-by: Manikanta Mylavarapu <quic_mmanikan@quicinc.com>
>> ---
>> Changes in v4:
>> 	- Rebased on linux-next
>>
>>   drivers/firmware/qcom_scm.c            | 78 ++++++++++++++++++++++++++
>>   drivers/firmware/qcom_scm.h            |  2 +
>>   include/linux/firmware/qcom/qcom_scm.h |  2 +
>>   3 files changed, 82 insertions(+)
>>
>> diff --git a/drivers/firmware/qcom_scm.c b/drivers/firmware/qcom_scm.c
>> index 3bc8c63a997f..2275cf7bc887 100644
>> --- a/drivers/firmware/qcom_scm.c
>> +++ b/drivers/firmware/qcom_scm.c
>> @@ -676,6 +676,84 @@ bool qcom_scm_pas_supported(u32 peripheral)
>>   }
>>   EXPORT_SYMBOL(qcom_scm_pas_supported);
>>   
>> +/**
>> + * qcom_scm_msa_lock() - Lock given peripheral firmware region as MSA
>> + *
>> + * @peripheral:	peripheral id
>> + *
>> + * Return 0 on success.
>> + */
>> +int qcom_scm_msa_lock(u32 peripheral)
>> +{
>> +	int ret;
>> +	struct qcom_scm_desc desc = {
>> +		.svc = QCOM_SCM_SVC_PIL,
>> +		.cmd = QCOM_SCM_MSA_LOCK,
>> +		.arginfo = QCOM_SCM_ARGS(1),
>> +		.args[0] = peripheral,
>> +		.owner = ARM_SMCCC_OWNER_SIP,
>> +	};
>> +	struct qcom_scm_res res;
>> +
>> +	if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
>> +					  QCOM_SCM_MSA_LOCK))
>> +		return 0;
>> +
>> +	ret = qcom_scm_clk_enable();
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = qcom_scm_bw_enable();
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = qcom_scm_call(__scm->dev, &desc, &res);
>> +	qcom_scm_bw_disable();
>> +	qcom_scm_clk_disable();
>> +
>> +	return ret ? : res.result[0];
>> +}
>> +EXPORT_SYMBOL(qcom_scm_msa_lock);
> 
> Could you please convert this to EXPORT_SYMBOL_GPL?
> 
Ok, sure.

>> +
>> +/**
>> + * qcom_scm_msa_unlock() - Unlock given peripheral MSA firmware region
>> + *
>> + * @peripheral:	peripheral id
>> + *
>> + * Return 0 on success.
>> + */
>> +int qcom_scm_msa_unlock(u32 peripheral)
>> +{
>> +	int ret;
>> +	struct qcom_scm_desc desc = {
>> +		.svc = QCOM_SCM_SVC_PIL,
>> +		.cmd = QCOM_SCM_MSA_UNLOCK,
>> +		.arginfo = QCOM_SCM_ARGS(1),
>> +		.args[0] = peripheral,
>> +		.owner = ARM_SMCCC_OWNER_SIP,
>> +	};
>> +	struct qcom_scm_res res;
>> +
>> +	if (!__qcom_scm_is_call_available(__scm->dev, QCOM_SCM_SVC_PIL,
>> +					  QCOM_SCM_MSA_UNLOCK))
>> +		return 0;
>> +
>> +	ret = qcom_scm_clk_enable();
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = qcom_scm_bw_enable();
>> +	if (ret)
>> +		return ret;
>> +
>> +	ret = qcom_scm_call(__scm->dev, &desc, &res);
>> +	qcom_scm_bw_disable();
>> +	qcom_scm_clk_disable();
>> +
>> +	return ret ? : res.result[0];
>> +}
>> +EXPORT_SYMBOL(qcom_scm_msa_unlock);
> 
> This one too?
> 
Ok, sure.

> Reference: [1]
> The whole driver has now moved to using EXPORT_SYMBOL_GPL() now.
> 
> [1] https://lore.kernel.org/lkml/19d9ac0bf79f957574ef9b3b73246ea0113cc0fd.1690503893.git.quic_gurus@quicinc.com/
> 
> Thank you.
> 
> Guru Das.

Thanks & Regards,
Manikanta.