[Qemu-devel] Re: [PATCH V6 21/32] pci: move pci host stuff from pci.c to pci_host.c

["Michael S. Tsirkin" <mst@redhat.com>]

On Fri, Oct 30, 2009 at 09:21:15PM +0900, Isaku Yamahata wrote:
> Move pci host stuff from pci.c to pci_host.c.
> And add some comments.
> Later pcie host bridge functions will be defined in pcie_host.c
> not to bloat pci.c.

For consistency, should we also move declaration to appropriate header,
and rename it as well?

> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>
> ---
>  hw/pci.c      |   67 ---------------------------------------------------------
>  hw/pci_host.c |   63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 63 insertions(+), 67 deletions(-)
> 
> diff --git a/hw/pci.c b/hw/pci.c
> index d0a96c6..a599996 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -663,73 +663,6 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
>          pci_update_mappings(d);
>  }
>  
> -static inline PCIDevice *pci_addr_to_dev(PCIBus *bus, uint32_t addr)
> -{
> -    uint8_t bus_num = (addr >> 16) & 0xff;
> -    uint8_t devfn = (addr >> 8) & 0xff;
> -    return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
> -}
> -
> -static inline int pci_addr_to_config(uint32_t addr)
> -{
> -    return addr & (PCI_CONFIG_SPACE_SIZE - 1);
> -}
> -
> -void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
> -{
> -    PCIBus *s = opaque;
> -    PCIDevice *pci_dev;
> -    int config_addr;
> -
> -#if 0
> -    PCI_DPRINTF("pci_data_write: addr=%08x val=%08x len=%d\n",
> -                addr, val, len);
> -#endif
> -    pci_dev = pci_addr_to_dev(s, addr);
> -    if (!pci_dev)
> -        return;
> -    config_addr = addr & 0xff;
> -    config_addr = pci_addr_to_config(addr);
> -    PCI_DPRINTF("pci_config_write: %s: addr=%02x val=%08x len=%d\n",
> -                pci_dev->name, config_addr, val, len);
> -    pci_dev->config_write(pci_dev, config_addr, val, len);
> -}
> -
> -uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
> -{
> -    PCIBus *s = opaque;
> -    PCIDevice *pci_dev;
> -    int config_addr;
> -    uint32_t val;
> -
> -    pci_dev = pci_addr_to_dev(s, addr);
> -    if (!pci_dev) {
> -        switch(len) {
> -        case 1:
> -            val = 0xff;
> -            break;
> -        case 2:
> -            val = 0xffff;
> -            break;
> -        default:
> -        case 4:
> -            val = 0xffffffff;
> -            break;
> -        }
> -        goto the_end;
> -    }
> -    config_addr = pci_addr_to_config(addr);
> -    val = pci_dev->config_read(pci_dev, config_addr, len);
> -    PCI_DPRINTF("pci_config_read: %s: addr=%02x val=%08x len=%d\n",
> -                pci_dev->name, config_addr, val, len);
> - the_end:
> -#if 0
> -    PCI_DPRINTF("pci_data_read: addr=%08x val=%08x len=%d\n",
> -                addr, val, len);
> -#endif
> -    return val;
> -}
> -
>  /***********************************************************/
>  /* generic PCI irq support */
>  
> diff --git a/hw/pci_host.c b/hw/pci_host.c
> index 6009e37..351ade4 100644
> --- a/hw/pci_host.c
> +++ b/hw/pci_host.c
> @@ -32,6 +32,69 @@ do { printf("pci_host_data: " fmt , ## __VA_ARGS__); } while (0)
>  #define PCI_DPRINTF(fmt, ...)
>  #endif
>  
> +/*
> + * PCI address
> + * bit 16 - 24: bus number
> + * bit  8 - 15: devfun number
> + * bit  0 -  7: offset in configuration space of a given pci device
> + */
> +
> +/* the helper functio to get a PCIDeice* for a given pci address */
> +static inline PCIDevice *pci_addr_to_dev(PCIBus *bus, uint32_t addr)
> +{
> +    uint8_t bus_num = (addr >> 16) & 0xff;
> +    uint8_t devfn = (addr >> 8) & 0xff;
> +    return pci_find_device(bus, bus_num, PCI_SLOT(devfn), PCI_FUNC(devfn));
> +}
> +
> +static inline uint32_t pci_addr_to_config(uint32_t addr)
> +{
> +    return addr & (PCI_CONFIG_SPACE_SIZE - 1);
> +}
> +
> +void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
> +{
> +    PCIBus *s = opaque;
> +    PCIDevice *pci_dev = pci_addr_to_dev(s, addr);
> +    uint32_t config_addr = pci_addr_to_config(addr);
> +
> +    if (!pci_dev)
> +        return;
> +
> +    PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRI32x" len=%d\n",
> +                __func__, pci_dev->name, config_addr, val, len);
> +    pci_dev->config_write(pci_dev, config_addr, val, len);
> +}
> +
> +uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
> +{
> +    PCIBus *s = opaque;
> +    PCIDevice *pci_dev = pci_addr_to_dev(s, addr);
> +    uint32_t config_addr = pci_addr_to_config(addr);
> +    uint32_t val;
> +
> +    if (!pci_dev) {
> +        switch(len) {
> +        case 1:
> +            val = 0xff;
> +            break;
> +        case 2:
> +            val = 0xffff;
> +            break;
> +        default:
> +        case 4:
> +            val = 0xffffffff;
> +            break;
> +        }

We can do the memcpy trick here as well I think.

> +    } else {
> +        val = pci_dev->config_read(pci_dev, config_addr, len);
> +        PCI_DPRINTF("%s: %s: addr=%02"PRIx32" val=%08"PRIx32" len=%d\n",
> +                    __func__, pci_dev->name, config_addr, val, len);
> +    }
> +
> +    return val;
> +}
> +
>  static void pci_host_config_writel(void *opaque, target_phys_addr_t addr,
>                                     uint32_t val)
>  {
> -- 
> 1.6.0.2