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[Qemu-devel] Re: [PATCH 2/3] pci: use devfn for pci_find_device() instea
From: |
Michael S. Tsirkin |
Subject: |
[Qemu-devel] Re: [PATCH 2/3] pci: use devfn for pci_find_device() instead of (slot, fn) pair |
Date: |
Wed, 26 Jan 2011 15:38:48 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jan 26, 2011 at 06:45:19PM +0900, Isaku Yamahata wrote:
> (slot, fn) pair is somewhat confusing because of ARI.
> So use devfn for pci_find_device() instead of (slot, fn).
>
> Signed-off-by: Isaku Yamahata <address@hidden>
I'd prefer using uint8_t for devfn. This way we don't need
to bother to range-check it either.
> ---
> hw/pci-hotplug.c | 5 +++--
> hw/pci.c | 5 +++--
> hw/pci.h | 2 +-
> hw/pci_host.c | 2 +-
> hw/pcie_host.c | 3 +--
> 5 files changed, 9 insertions(+), 8 deletions(-)
>
> diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
> index 270a982..9715235 100644
> --- a/hw/pci-hotplug.c
> +++ b/hw/pci-hotplug.c
> @@ -126,7 +126,8 @@ void drive_hot_add(Monitor *mon, const QDict *qdict)
> if (pci_read_devaddr(mon, pci_addr, &dom, &pci_bus, &slot)) {
> goto err;
> }
> - dev = pci_find_device(pci_find_root_bus(dom), pci_bus, slot, 0);
> + dev = pci_find_device(pci_find_root_bus(dom), pci_bus,
> + PCI_DEVFN(slot, 0));
> if (!dev) {
> monitor_printf(mon, "no pci device with address %s\n", pci_addr);
> goto err;
> @@ -276,7 +277,7 @@ static int pci_device_hot_remove(Monitor *mon, const char
> *pci_addr)
> return -1;
> }
>
> - d = pci_find_device(pci_find_root_bus(dom), bus, slot, 0);
> + d = pci_find_device(pci_find_root_bus(dom), bus, PCI_DEVFN(slot, 0));
> if (!d) {
> monitor_printf(mon, "slot %d empty\n", slot);
> return -1;
> diff --git a/hw/pci.c b/hw/pci.c
> index 79a46e7..ac16029 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -1599,14 +1599,15 @@ PCIBus *pci_find_bus(PCIBus *bus, int bus_num)
> return NULL;
> }
>
> -PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function)
> +PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int devfn)
> {
> + assert(devfn < PCI_DEVFN_MAX);
> bus = pci_find_bus(bus, bus_num);
>
> if (!bus)
> return NULL;
>
> - return bus->devices[PCI_DEVFN(slot, function)];
> + return bus->devices[devfn];
> }
>
> static int pci_qdev_init(DeviceState *qdev, DeviceInfo *base)
> diff --git a/hw/pci.h b/hw/pci.h
> index ffb04e8..f6d20f6 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -253,7 +253,7 @@ void pci_for_each_device(PCIBus *bus, int bus_num, void
> (*fn)(PCIBus *bus, PCIDe
> PCIBus *pci_find_root_bus(int domain);
> int pci_find_domain(const PCIBus *bus);
> PCIBus *pci_find_bus(PCIBus *bus, int bus_num);
> -PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int slot, int function);
> +PCIDevice *pci_find_device(PCIBus *bus, int bus_num, int devfn);
> int pci_qdev_find_device(const char *id, PCIDevice **pdev);
> PCIBus *pci_get_bus_devfn(int *devfnp, const char *devaddr);
>
> diff --git a/hw/pci_host.c b/hw/pci_host.c
> index 7c40155..728e2d4 100644
> --- a/hw/pci_host.c
> +++ b/hw/pci_host.c
> @@ -44,7 +44,7 @@ static inline PCIDevice *pci_dev_find_by_addr(PCIBus *bus,
> uint32_t addr)
> uint8_t bus_num = addr >> 16;
> uint8_t devfn = addr >> 8;
>
> - return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
> + return pci_find_device(bus, bus_num, devfn);
> }
>
> void pci_data_write(PCIBus *s, uint32_t addr, uint32_t val, int len)
> diff --git a/hw/pcie_host.c b/hw/pcie_host.c
> index 21069ee..b749865 100644
> --- a/hw/pcie_host.c
> +++ b/hw/pcie_host.c
> @@ -49,8 +49,7 @@ static inline PCIDevice *pcie_dev_find_by_mmcfg_addr(PCIBus
> *s,
> uint32_t mmcfg_addr)
> {
> return pci_find_device(s, PCIE_MMCFG_BUS(mmcfg_addr),
> - PCI_SLOT(PCIE_MMCFG_DEVFN(mmcfg_addr)),
> - PCI_FUNC(PCIE_MMCFG_DEVFN(mmcfg_addr)));
> + PCIE_MMCFG_DEVFN(mmcfg_addr));
> }
>
> static void pcie_mmcfg_data_write(PCIBus *s,
> --
> 1.7.1.1
- [Qemu-devel] [PATCH 0/3] pci/pcie: implement ARI enable bit correctly, Isaku Yamahata, 2011/01/26
- [Qemu-devel] [PATCH 1/3] pci: replace the magic, 256, for the maximum of devfn, Isaku Yamahata, 2011/01/26
- [Qemu-devel] [PATCH 3/3] pci/pcie: make pci_find_device() ARI aware., Isaku Yamahata, 2011/01/26
- [Qemu-devel] [PATCH 2/3] pci: use devfn for pci_find_device() instead of (slot, fn) pair, Isaku Yamahata, 2011/01/26
- [Qemu-devel] Re: [PATCH 2/3] pci: use devfn for pci_find_device() instead of (slot, fn) pair,
Michael S. Tsirkin <=