[+cc Marc; IRQ DOMAINS (IRQ NUMBER MAPPING LIBRARY) maintainer]
On Fri, May 15, 2020 at 10:58:59, 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.
>
> Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@xxxxxxxxxxxxx>
> ---
> drivers/pci/controller/dwc/pcie-designware-host.c | 8 ++++----
> drivers/pci/controller/dwc/pcie-designware.h | 1 +
> 2 files changed, 5 insertions(+), 4 deletions(-)
>
> diff --git a/drivers/pci/controller/dwc/pcie-designware-host.c b/drivers/pci/controller/dwc/pcie-designware-host.c
> index 42fbfe2..7dd1021 100644
> --- a/drivers/pci/controller/dwc/pcie-designware-host.c
> +++ b/drivers/pci/controller/dwc/pcie-designware-host.c
> @@ -112,13 +112,13 @@ irqreturn_t dw_handle_msi_irq(struct pcie_port *pp)
> static void dw_chained_msi_isr(struct irq_desc *desc)
> {
> struct irq_chip *chip = irq_desc_get_chip(desc);
> - struct pcie_port *pp;
> + struct pcie_port *pp = irq_desc_get_handler_data(desc);
>
> - chained_irq_enter(chip, desc);
> + if (pp->ops->msi_host_isr)
> + pp->ops->msi_host_isr(pp);
>
> - pp = irq_desc_get_handler_data(desc);
> + chained_irq_enter(chip, desc);
> dw_handle_msi_irq(pp);
> -
> chained_irq_exit(chip, desc);
> }
>
> 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
