RE: [PATCH v4 1/6] PCI: dwc: Add msi_host_isr() callback

[Gustavo Pimentel]

On Fri, Jun 5, 2020 at 10:44:31, Kunihiko Hayashi 
<hayashi.kunihiko@xxxxxxxxxxxxx> wrote:

> This adds msi_host_isr() callback function support to describe
> SoC-dependent service triggered by MSI.
> 
> For example, when AER interrupt is triggered by MSI, the callback function
> reads SoC-dependent registers and detects that the interrupt is from AER,
> and invoke AER interrupts related to MSI.
> 
> Cc: Marc Zyngier <maz@xxxxxxxxxx>
> Cc: Jingoo Han <jingoohan1@xxxxxxxxx>
> Cc: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
> ---
>  drivers/pci/controller/dwc/pcie-designware-host.c | 3 +++
>  drivers/pci/controller/dwc/pcie-designware.h      | 1 +
>  2 files changed, 4 insertions(+)
> 
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 0a4a5aa..026edb1 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -83,6 +83,9 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
>  	u32 status, num_ctrls;
>  	irqreturn_t ret = IRQ_NONE;
>  
> +	if (pp->ops->msi_host_isr)
> +		pp->ops->msi_host_isr(pp);
> +
>  	num_ctrls = pp->num_vectors / MAX_MSI_IRQS_PER_CTRL;
>  
>  	for (i = 0; i < num_ctrls; i++) {
> diff --git a/drivers/pci/controller/dwc/pcie-designware.h b/drivers/pci/controller/dwc/pcie-designware.h
> index 656e00f..e741967 100644
> --- a/drivers/pci/controller/dwc/pcie-designware.h
> +++ b/drivers/pci/controller/dwc/pcie-designware.h
> @@ -170,6 +170,7 @@ struct dw_pcie_host_ops {
>  	void (*scan_bus)(struct pcie_port *pp);
>  	void (*set_num_vectors)(struct pcie_port *pp);
>  	int (*msi_host_init)(struct pcie_port *pp);
> +	void (*msi_host_isr)(struct pcie_port *pp);
>  };
>  
>  struct pcie_port {
> -- 
> 2.7.4


Acked-by: Gustavo Pimentel <gustavo.pimentel@xxxxxxxxxxxx>