[Qemu-devel] Re: [PATCH V5 20/29] pci: move pci host stuff from pci.c to pci_host.c

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

On Fri, Oct 09, 2009 at 03:28:53PM +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.
> 
> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp>

So this is good stuff except we do not need
pci_dev_write_config/pci_dev_read_config.

> ---
>  hw/pci.c      |   34 ++++------------------------------
>  hw/pci.h      |    4 ++++
>  hw/pci_host.c |   34 ++++++++++++++++++++++++++++++++++
>  3 files changed, 42 insertions(+), 30 deletions(-)
> 
> diff --git a/hw/pci.c b/hw/pci.c
> index d472b58..99b420f 100644
> --- a/hw/pci.c
> +++ b/hw/pci.c
> @@ -654,8 +654,8 @@ void pci_default_write_config(PCIDevice *d, uint32_t addr, uint32_t val, int l)
>          pci_update_mappings(d);
>  }
>  
> -static void pci_dev_write_config(PCIDevice *pci_dev,
> -                                 uint32_t config_addr, uint32_t val, int len)
> +void pci_dev_write_config(PCIDevice *pci_dev,
> +                          uint32_t config_addr, uint32_t val, int len)
>  {
>      assert(len == 1 || len == 2 || len == 4);
>      if (!pci_dev)
> @@ -666,8 +666,8 @@ static void pci_dev_write_config(PCIDevice *pci_dev,
>      pci_dev->config_write(pci_dev, config_addr, val, len);
>  }
>  
> -static uint32_t pci_dev_read_config(PCIDevice *pci_dev,
> -                                    uint32_t config_addr, int len)
> +uint32_t pci_dev_read_config(PCIDevice *pci_dev,
> +                             uint32_t config_addr, int len)
>  {
>      uint32_t val;
>  
> @@ -693,32 +693,6 @@ static uint32_t pci_dev_read_config(PCIDevice *pci_dev,
>      return val;
>  }
>  
> -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 & 0xff;
> -}
> -
> -void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
> -{
> -    PCIBus *s = opaque;
> -    pci_dev_write_config(pci_addr_to_dev(s, addr), pci_addr_to_config(addr),
> -                         val, len);
> -}
> -
> -uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
> -{
> -    PCIBus *s = opaque;
> -    return pci_dev_read_config(pci_addr_to_dev(s, addr),
> -                               pci_addr_to_config(addr), len);
> -}
> -
>  /***********************************************************/
>  /* generic PCI irq support */
>  
> diff --git a/hw/pci.h b/hw/pci.h
> index 3a3838d..7711ed4 100644
> --- a/hw/pci.h
> +++ b/hw/pci.h
> @@ -268,6 +268,10 @@ PCIDevice *pci_nic_init(NICInfo *nd, const char *default_model,
>                          const char *default_devaddr);
>  PCIDevice *pci_nic_init_nofail(NICInfo *nd, const char *default_model,
>                                 const char *default_devaddr);
> +void pci_dev_write_config(PCIDevice *pci_dev,
> +                          uint32_t config_addr, uint32_t val, int len);
> +uint32_t pci_dev_read_config(PCIDevice *pci_dev,
> +                             uint32_t config_addr, int len);
>  void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len);
>  uint32_t pci_data_read(void *opaque, uint32_t addr, int len);
>  int pci_bus_num(PCIBus *s);
> diff --git a/hw/pci_host.c b/hw/pci_host.c
> index 99416c8..d827b06 100644
> --- a/hw/pci_host.c
> +++ b/hw/pci_host.c
> @@ -32,6 +32,40 @@ 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 & 0xff;
> +}
> +
> +void pci_data_write(void *opaque, uint32_t addr, uint32_t val, int len)
> +{
> +    PCIBus *s = opaque;
> +    pci_dev_write_config(pci_addr_to_dev(s, addr), pci_addr_to_config(addr),
> +                         val, len);
> +}
> +
> +uint32_t pci_data_read(void *opaque, uint32_t addr, int len)
> +{
> +    PCIBus *s = opaque;
> +    return pci_dev_read_config(pci_addr_to_dev(s, addr),
> +                               pci_addr_to_config(addr), len);
> +}
> +
>  static void pci_host_config_writel(void *opaque, target_phys_addr_t addr,
>                                     uint32_t val)
>  {
> -- 
> 1.6.0.2