linux-kernel - Re: [PATCH 2/6] irqdomain: add a new send_ipi() to irq_domain

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Message-ID: <5602D6F3.7030709@linux.intel.com>
Date:	Thu, 24 Sep 2015 00:44:35 +0800
From:	Jiang Liu <jiang.liu@...ux.intel.com>
To:	Qais Yousef <qais.yousef@...tec.com>, linux-kernel@...r.kernel.org,
	tglx@...utronix.de
Cc:	marc.zyngier@....com, jason@...edaemon.net,
	linux-mips@...ux-mips.org
Subject: Re: [PATCH 2/6] irqdomain: add a new send_ipi() to irq_domain_ops

On 2015/9/23 22:49, Qais Yousef wrote:
> For generic ipi core to use. It takes hwirq as its sole argument.
> Hopefully this is generic enough? Should we pass something more abstract?
> 
> Signed-off-by: Qais Yousef <qais.yousef@...tec.com>
> ---
>  include/linux/irqdomain.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
> index 9b3dc6c2a3cc..cef9e6158be0 100644
> --- a/include/linux/irqdomain.h
> +++ b/include/linux/irqdomain.h
> @@ -92,6 +92,7 @@ struct irq_domain_ops {
>  	void (*activate)(struct irq_domain *d, struct irq_data *irq_data);
>  	void (*deactivate)(struct irq_domain *d, struct irq_data *irq_data);
>  #endif
> +	void (*send_ipi)(irq_hw_number_t hwirq);
Hi Qais,
	Instead of extending the irq_domain_ops, how about extending
irq_chip instead? If we treat IPI as a sort of irq controller, and
irq_chip is used to encapsulate all irq controller related operations,
and irq_domain_ops is mainly used to allocated resources instead of
operating corresponding hardware.
Thanks!
Gerry

>  };
>  
>  extern struct irq_domain_ops irq_generic_chip_ops;
> 
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