On 10/18/21 03:36, BALATON Zoltan wrote:
> Cache the pointer to PCI function 0 (ISA bridge, that this IDE device
> has to use for IRQs) in the PCIIDEState and pass that as the opaque
> data for the interrupt handler to eliminate both the need to look up
> function 0 at every interrupt and also a QOM type cast of the opaque
> pointer as that's also expensive (mainly due to qom-debug being
> enabled by default).
>
> Suggested-by: Philippe Mathieu-Daudé <f4...@amsat.org>
> Signed-off-by: BALATON Zoltan <bala...@eik.bme.hu>
> ---
> hw/ide/via.c | 11 ++++++-----
> include/hw/ide/pci.h | 1 +
> 2 files changed, 7 insertions(+), 5 deletions(-)
>
> diff --git a/hw/ide/via.c b/hw/ide/via.c
> index 82def819c4..30566bc409 100644
> --- a/hw/ide/via.c
> +++ b/hw/ide/via.c
> @@ -104,15 +104,15 @@ static void bmdma_setup_bar(PCIIDEState *d)
>
> static void via_ide_set_irq(void *opaque, int n, int level)
> {
> - PCIDevice *d = PCI_DEVICE(opaque);
> + PCIIDEState *d = opaque;
>
> if (level) {
> - d->config[0x70 + n * 8] |= 0x80;
> + d->parent_obj.config[0x70 + n * 8] |= 0x80;
> } else {
> - d->config[0x70 + n * 8] &= ~0x80;
> + d->parent_obj.config[0x70 + n * 8] &= ~0x80;
> }
Better not to access parent_obj, so I'd rather keep the previous
code as it. The rest is OK, thanks. If you don't want to respin
I can fix and take via mips-next.
>
> - via_isa_set_irq(pci_get_function_0(d), 14 + n, level);
> + via_isa_set_irq(d->func0, 14 + n, level);
> }
>
> static void via_ide_reset(DeviceState *dev)
> @@ -188,7 +188,8 @@ static void via_ide_realize(PCIDevice *dev, Error **errp)
> bmdma_setup_bar(d);
> pci_register_bar(dev, 4, PCI_BASE_ADDRESS_SPACE_IO, &d->bmdma_bar);
>
> - qdev_init_gpio_in(ds, via_ide_set_irq, 2);
> + d->func0 = pci_get_function_0(dev);
> + qdev_init_gpio_in_named_with_opaque(ds, via_ide_set_irq, d, NULL, 2);
> for (i = 0; i < 2; i++) {
> ide_bus_init(&d->bus[i], sizeof(d->bus[i]), ds, i, 2);
> ide_init2(&d->bus[i], qdev_get_gpio_in(ds, i));
> diff --git a/include/hw/ide/pci.h b/include/hw/ide/pci.h
> index d8384e1c42..89d14abf95 100644
> --- a/include/hw/ide/pci.h
> +++ b/include/hw/ide/pci.h
> @@ -50,6 +50,7 @@ struct PCIIDEState {
> IDEBus bus[2];
> BMDMAState bmdma[2];
> uint32_t secondary; /* used only for cmd646 */
> + PCIDevice *func0; /* used only by IDE functions of superio chips */
> MemoryRegion bmdma_bar;
> MemoryRegion cmd_bar[2];
> MemoryRegion data_bar[2];
>
