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Date:   Sun, 1 Jan 2023 12:32:28 -0600
From:   Alex Elder <alex.elder@...aro.org>
To:     Caleb Connolly <caleb.connolly@...aro.org>,
        Alex Elder <elder@...aro.org>, davem@...emloft.net,
        edumazet@...gle.com, kuba@...nel.org, pabeni@...hat.com
Cc:     mka@...omium.org, evgreen@...omium.org, andersson@...nel.org,
        quic_cpratapa@...cinc.com, quic_avuyyuru@...cinc.com,
        quic_jponduru@...cinc.com, quic_subashab@...cinc.com,
        elder@...nel.org, netdev@...r.kernel.org,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 3/6] net: ipa: enable IPA interrupt handlers
 separate from registration

On 12/31/22 11:56 AM, Caleb Connolly wrote:
> 
> 
> On 30/12/2022 23:22, Alex Elder wrote:
>> Expose ipa_interrupt_enable() and have functions that register
>> IPA interrupt handlers enable them directly, rather than having the
>> registration process do that.  Do the same for disabling IPA
>> interrupt handlers.
> 
> Hi,
>>
>> Signed-off-by: Alex Elder <elder@...aro.org>
>> ---
>>   drivers/net/ipa/ipa_interrupt.c |  8 ++------
>>   drivers/net/ipa/ipa_interrupt.h | 14 ++++++++++++++
>>   drivers/net/ipa/ipa_power.c     |  6 +++++-
>>   drivers/net/ipa/ipa_uc.c        |  4 ++++
>>   4 files changed, 25 insertions(+), 7 deletions(-)
>>
>> diff --git a/drivers/net/ipa/ipa_interrupt.c 
>> b/drivers/net/ipa/ipa_interrupt.c
>> index 7b7388c14806f..87f4b94d02a3f 100644
>> --- a/drivers/net/ipa/ipa_interrupt.c
>> +++ b/drivers/net/ipa/ipa_interrupt.c
>> @@ -135,7 +135,7 @@ static void ipa_interrupt_enabled_update(struct 
>> ipa *ipa)
>>   }
>>   /* Enable an IPA interrupt type */
>> -static void ipa_interrupt_enable(struct ipa *ipa, enum ipa_irq_id 
>> ipa_irq)
>> +void ipa_interrupt_enable(struct ipa *ipa, enum ipa_irq_id ipa_irq)
>>   {
>>       /* Update the IPA interrupt mask to enable it */
>>       ipa->interrupt->enabled |= BIT(ipa_irq);
>> @@ -143,7 +143,7 @@ static void ipa_interrupt_enable(struct ipa *ipa, 
>> enum ipa_irq_id ipa_irq)
>>   }
>>   /* Disable an IPA interrupt type */
>> -static void ipa_interrupt_disable(struct ipa *ipa, enum ipa_irq_id 
>> ipa_irq)
>> +void ipa_interrupt_disable(struct ipa *ipa, enum ipa_irq_id ipa_irq)
>>   {
>>       /* Update the IPA interrupt mask to disable it */
>>       ipa->interrupt->enabled &= ~BIT(ipa_irq);
>> @@ -232,8 +232,6 @@ void ipa_interrupt_add(struct ipa_interrupt 
>> *interrupt,
>>           return;
>>       interrupt->handler[ipa_irq] = handler;
>> -
>> -    ipa_interrupt_enable(interrupt->ipa, ipa_irq);
>>   }
>>   /* Remove the handler for an IPA interrupt type */
>> @@ -243,8 +241,6 @@ ipa_interrupt_remove(struct ipa_interrupt 
>> *interrupt, enum ipa_irq_id ipa_irq)
>>       if (WARN_ON(ipa_irq >= IPA_IRQ_COUNT))
>>           return;
>> -    ipa_interrupt_disable(interrupt->ipa, ipa_irq);
>> -
>>       interrupt->handler[ipa_irq] = NULL;
>>   }
>> diff --git a/drivers/net/ipa/ipa_interrupt.h 
>> b/drivers/net/ipa/ipa_interrupt.h
>> index f31fd9965fdc6..5f7d2e90ea337 100644
>> --- a/drivers/net/ipa/ipa_interrupt.h
>> +++ b/drivers/net/ipa/ipa_interrupt.h
>> @@ -85,6 +85,20 @@ void ipa_interrupt_suspend_clear_all(struct 
>> ipa_interrupt *interrupt);
>>    */
>>   void ipa_interrupt_simulate_suspend(struct ipa_interrupt *interrupt);
>> +/**
>> + * ipa_interrupt_enable() - Enable an IPA interrupt type
>> + * @ipa:    IPA pointer
>> + * @ipa_irq:    IPA interrupt ID
>> + */
>> +void ipa_interrupt_enable(struct ipa *ipa, enum ipa_irq_id ipa_irq);
> 
> I think you forgot a forward declaration for enum ipa_irq_id

Thanks, I'll verify this and will send v2 with a fix once
net-next is open for business again.

					-Alex

> 
> Kind Regards,
> Caleb
>> +
>> +/**
>> + * ipa_interrupt_disable() - Disable an IPA interrupt type
>> + * @ipa:    IPA pointer
>> + * @ipa_irq:    IPA interrupt ID
>> + */
>> +void ipa_interrupt_disable(struct ipa *ipa, enum ipa_irq_id ipa_irq);
>> +
>>   /**
>>    * ipa_interrupt_config() - Configure the IPA interrupt framework
>>    * @ipa:    IPA pointer
>> diff --git a/drivers/net/ipa/ipa_power.c b/drivers/net/ipa/ipa_power.c
>> index 8420f93128a26..9148d606d5fc2 100644
>> --- a/drivers/net/ipa/ipa_power.c
>> +++ b/drivers/net/ipa/ipa_power.c
>> @@ -337,10 +337,13 @@ int ipa_power_setup(struct ipa *ipa)
>>       ipa_interrupt_add(ipa->interrupt, IPA_IRQ_TX_SUSPEND,
>>                 ipa_suspend_handler);
>> +    ipa_interrupt_enable(ipa, IPA_IRQ_TX_SUSPEND);
>>       ret = device_init_wakeup(&ipa->pdev->dev, true);
>> -    if (ret)
>> +    if (ret) {
>> +        ipa_interrupt_disable(ipa, IPA_IRQ_TX_SUSPEND);
>>           ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
>> +    }
>>       return ret;
>>   }
>> @@ -348,6 +351,7 @@ int ipa_power_setup(struct ipa *ipa)
>>   void ipa_power_teardown(struct ipa *ipa)
>>   {
>>       (void)device_init_wakeup(&ipa->pdev->dev, false);
>> +    ipa_interrupt_disable(ipa, IPA_IRQ_TX_SUSPEND);
>>       ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_TX_SUSPEND);
>>   }
>> diff --git a/drivers/net/ipa/ipa_uc.c b/drivers/net/ipa/ipa_uc.c
>> index 0a890b44c09e1..af541758d047f 100644
>> --- a/drivers/net/ipa/ipa_uc.c
>> +++ b/drivers/net/ipa/ipa_uc.c
>> @@ -187,7 +187,9 @@ void ipa_uc_config(struct ipa *ipa)
>>       ipa->uc_powered = false;
>>       ipa->uc_loaded = false;
>>       ipa_interrupt_add(interrupt, IPA_IRQ_UC_0, 
>> ipa_uc_interrupt_handler);
>> +    ipa_interrupt_enable(ipa, IPA_IRQ_UC_0);
>>       ipa_interrupt_add(interrupt, IPA_IRQ_UC_1, 
>> ipa_uc_interrupt_handler);
>> +    ipa_interrupt_enable(ipa, IPA_IRQ_UC_1);
>>   }
>>   /* Inverse of ipa_uc_config() */
>> @@ -195,7 +197,9 @@ void ipa_uc_deconfig(struct ipa *ipa)
>>   {
>>       struct device *dev = &ipa->pdev->dev;
>> +    ipa_interrupt_disable(ipa, IPA_IRQ_UC_1);
>>       ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_1);
>> +    ipa_interrupt_disable(ipa, IPA_IRQ_UC_0);
>>       ipa_interrupt_remove(ipa->interrupt, IPA_IRQ_UC_0);
>>       if (ipa->uc_loaded)
>>           ipa_power_retention(ipa, false);

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