Re: [Qemu-devel] [PATCH v3 1/2] lsi53c895a: add optional external IRQ via qdev

[Fam Zheng <famz@redhat.com>]

On Tue, 09/11 11:27, David Gibson wrote:
> On Mon, Sep 10, 2018 at 09:46:30PM +0100, Mark Cave-Ayland wrote:
> > On some early machines the on-board PCI devices IRQs are wired directly to
> > the interrupt controller instead of via the PCI host bridge.
> > 
> > Add an optional external IRQ that if wired up via qdev will replace the
> > in-built PCI IRQ.
> > 
> > Signed-off-by: Mark Cave-Ayland <mark.cave-ayland@ilande.co.uk>
> 
> Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
> 
> Fam, if I get an Acked-by from you I'm happy to take this through my tree.

This looks good to me, but I'm only 'R:' of scsi code. You'd perhaps need Paolo
to ack.  But anyway:

Reviewed-by: Fam Zheng <famz@redhat.com>

> 
> > ---
> >  hw/scsi/lsi53c895a.c | 16 ++++++++++++++--
> >  1 file changed, 14 insertions(+), 2 deletions(-)
> > 
> > diff --git a/hw/scsi/lsi53c895a.c b/hw/scsi/lsi53c895a.c
> > index f5cbbf653c..996b40650d 100644
> > --- a/hw/scsi/lsi53c895a.c
> > +++ b/hw/scsi/lsi53c895a.c
> > @@ -207,6 +207,7 @@ typedef struct {
> >      PCIDevice parent_obj;
> >      /*< public >*/
> >  
> > +    qemu_irq ext_irq;
> >      MemoryRegion mmio_io;
> >      MemoryRegion ram_io;
> >      MemoryRegion io_io;
> > @@ -443,9 +444,19 @@ static void lsi_stop_script(LSIState *s)
> >      s->istat1 &= ~LSI_ISTAT1_SRUN;
> >  }
> >  
> > -static void lsi_update_irq(LSIState *s)
> > +static void lsi_set_irq(LSIState *s, int level)
> >  {
> >      PCIDevice *d = PCI_DEVICE(s);
> > +
> > +    if (s->ext_irq) {
> > +        qemu_set_irq(s->ext_irq, level);
> > +    } else {
> > +        pci_set_irq(d, level);
> > +    }
> > +}
> > +
> > +static void lsi_update_irq(LSIState *s)
> > +{
> >      int level;
> >      static int last_level;
> >      lsi_request *p;
> > @@ -477,7 +488,7 @@ static void lsi_update_irq(LSIState *s)
> >                  level, s->dstat, s->sist1, s->sist0);
> >          last_level = level;
> >      }
> > -    pci_set_irq(d, level);
> > +    lsi_set_irq(s, level);
> >  
> >      if (!level && lsi_irq_on_rsl(s) && !(s->scntl1 & LSI_SCNTL1_CON)) {
> >          DPRINTF("Handled IRQs & disconnected, looking for pending "
> > @@ -2213,6 +2224,7 @@ static void lsi_scsi_realize(PCIDevice *dev, Error **errp)
> >                            "lsi-io", 256);
> >  
> >      address_space_init(&s->pci_io_as, pci_address_space_io(dev), "lsi-pci-io");
> > +    qdev_init_gpio_out(d, &s->ext_irq, 1);
> >  
> >      pci_register_bar(dev, 0, PCI_BASE_ADDRESS_SPACE_IO, &s->io_io);
> >      pci_register_bar(dev, 1, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio_io);
> 
> -- 
> David Gibson			| I'll have my music baroque, and my code
> david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
> 				| _way_ _around_!
> http://www.ozlabs.org/~dgibson