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[Qemu-devel] Re: [PATCH V6 18/32] pci: remove bus_num member from struct
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH V6 18/32] pci: remove bus_num member from struct PCIBus. |
Date: |
Tue, 10 Nov 2009 17:33:22 +0200 |
User-agent: |
Mutt/1.5.19 (2009-01-05) |
On Fri, Oct 30, 2009 at 09:21:12PM +0900, Isaku Yamahata wrote:
> Since It can be retrieved from pci configuration space,
> the member is unnecessary.
>
> Signed-off-by: Isaku Yamahata <address@hidden>
Acked-by: Michael S. Tsirkin <address@hidden>
> ---
> hw/pci.c | 21 ++++++++++-----------
> 1 files changed, 10 insertions(+), 11 deletions(-)
>
> diff --git a/hw/pci.c b/hw/pci.c
> index 7da3db9..a75d981 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -36,7 +36,6 @@
>
> struct PCIBus {
> BusState qbus;
> - int bus_num;
> int devfn_min;
> pci_set_irq_fn set_irq;
> pci_map_irq_fn map_irq;
> @@ -192,7 +191,9 @@ static void pci_register_secondary_bus(PCIBus *bus,
>
> int pci_bus_num(PCIBus *s)
> {
> - return s->bus_num;
> + if (!s->parent_dev)
> + return 0; /* pci host bridge */
> + return s->parent_dev->config[PCI_SECONDARY_BUS];
> }
>
> static int get_pci_config_device(QEMUFile *f, void *pv, size_t size)
> @@ -624,7 +625,7 @@ void pci_data_write(void *opaque, uint32_t addr, uint32_t
> val, int len)
> addr, val, len);
> #endif
> bus_num = (addr >> 16) & 0xff;
> - while (s && s->bus_num != bus_num)
> + while (s && pci_bus_num(s) != bus_num)
> s = s->next;
> if (!s)
> return;
> @@ -645,7 +646,7 @@ uint32_t pci_data_read(void *opaque, uint32_t addr, int
> len)
> uint32_t val;
>
> bus_num = (addr >> 16) & 0xff;
> - while (s && s->bus_num != bus_num)
> + while (s && pci_bus_num(s) != bus_num)
> s= s->next;
> if (!s)
> goto fail;
> @@ -760,7 +761,8 @@ static void pci_info_device(PCIDevice *d)
> const pci_class_desc *desc;
>
> monitor_printf(mon, " Bus %2d, device %3d, function %d:\n",
> - d->bus->bus_num, PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
> + pci_bus_num(d->bus),
> + PCI_SLOT(d->devfn), PCI_FUNC(d->devfn));
> class = pci_get_word(d->config + PCI_CLASS_DEVICE);
> monitor_printf(mon, " ");
> desc = pci_class_descriptions;
> @@ -816,7 +818,7 @@ void pci_for_each_device(int bus_num, void
> (*fn)(PCIDevice *d))
> PCIDevice *d;
> int devfn;
>
> - while (bus && bus->bus_num != bus_num)
> + while (bus && pci_bus_num(bus) != bus_num)
> bus = bus->next;
> if (bus) {
> for(devfn = 0; devfn < 256; devfn++) {
> @@ -913,17 +915,14 @@ typedef struct {
> static void pci_bridge_write_config(PCIDevice *d,
> uint32_t address, uint32_t val, int len)
> {
> - PCIBridge *s = (PCIBridge *)d;
> -
> pci_default_write_config(d, address, val, len);
> - s->bus.bus_num = d->config[PCI_SECONDARY_BUS];
> }
>
> PCIBus *pci_find_bus(int bus_num)
> {
> PCIBus *bus = first_bus;
>
> - while (bus && bus->bus_num != bus_num)
> + while (bus && pci_bus_num(bus) != bus_num)
> bus = bus->next;
>
> return bus;
> @@ -1149,7 +1148,7 @@ static void pcibus_dev_print(Monitor *mon, DeviceState
> *dev, int indent)
> monitor_printf(mon, "%*sclass %s, addr %02x:%02x.%x, "
> "pci id %04x:%04x (sub %04x:%04x)\n",
> indent, "", ctxt,
> - d->bus->bus_num, PCI_SLOT(d->devfn), PCI_FUNC(d->devfn),
> + pci_bus_num(d->bus), PCI_SLOT(d->devfn),
> PCI_FUNC(d->devfn),
> pci_get_word(d->config + PCI_VENDOR_ID),
> pci_get_word(d->config + PCI_DEVICE_ID),
> pci_get_word(d->config + PCI_SUBSYSTEM_VENDOR_ID),
> --
> 1.6.0.2
>
>