RE: find struct pci_dev from struct net_device

RE: find struct pci_dev from struct net_device

[Hen, Shmulik]

Take the value of dev->base_addr, mask it's lowest 4 bits, do a scan of all
PCI net devices and in each PCI device try to match to each of the 6 address
regs:

struct pci_dev* find_pci_device_by_baseddr(unsigned long base_addr)
{
      struct pci_dev *pcid = NULL;
      unsigned long reg;
      int i;

      base_addr &= ~(0x0000000F);

      while ((pcid = pci_find_class(PCI_CLASS_NETWORK_ETHERNET << 8, pcid)))
{
            for (i=0; i<6; i++) {
                  reg = pci_resource_start(pcid,i);
                  reg &= ~(0x0000000F);
                  if (reg == base_addr) {
                        return pcid;
                  }
            }
      }

      return NULL;
}
-----Original Message-----
From: Sebastian Heidl [mailto:heidl@zib.de]
Sent: Wednesday, September 12, 2001 3:53 PM
To: linux-kernel@vger.kernel.org
Subject: find struct pci_dev from struct net_device



Hi,

What's the easiest way to find a corresponding struct pci_dev from a
struct net_device ?  Especially, if the driver does not set
pci_dev.driver_data to it's net_device struct (such as the acenic
driver) ?

thanks,
_sh_

-- 
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Re: find struct pci_dev from struct net_device

[David Woodhouse]

shmulik.hen@intel.com said:
> Take the value of dev->base_addr, mask it's lowest 4 bits, do a scan
> of all PCI net devices and in each PCI device try to match to each of
> the 6 address regs: 

We have to assume this isn't a deliberate attempt to mislead, and that you 
really do things like this in your own code.

I suspect that whatever chance there was of someone trying to help out some
poor user unfortunate or ignorant enough to use the binary-only modules that
you are working on has just bitten the dust. 

--
dwmw2

RE: find struct pci_dev from struct net_device

[Hen, Shmulik]

Just trying to repent by contributing something good back to the community
;-)

Actually, I'm using this exact code and in an open source project too (we
have those too you know).

-----Original Message-----
From: David Woodhouse [mailto:dwmw2@infradead.org]
Sent: Thursday, September 13, 2001 12:42 PM
To: Hen, Shmulik
Cc: 'Sebastian Heidl'; linux-kernel@vger.kernel.org
Subject: Re: find struct pci_dev from struct net_device 



shmulik.hen@intel.com said:
> Take the value of dev->base_addr, mask it's lowest 4 bits, do a scan
> of all PCI net devices and in each PCI device try to match to each of
> the 6 address regs: 

We have to assume this isn't a deliberate attempt to mislead, and that you 
really do things like this in your own code.

I suspect that whatever chance there was of someone trying to help out some
poor user unfortunate or ignorant enough to use the binary-only modules that
you are working on has just bitten the dust. 

--
dwmw2

find struct pci_dev from struct net_device

[Sebastian Heidl]

Hi,

What's the easiest way to find a corresponding struct pci_dev from a
struct net_device ?  Especially, if the driver does not set
pci_dev.driver_data to it's net_device struct (such as the acenic
driver) ?

thanks,
_sh_

-- 

Re: find struct pci_dev from struct net_device

[Francois Romieu]

Sebastian Heidl <heidl@zib.de> :
> What's the easiest way to find a corresponding struct pci_dev from a
> struct net_device ?  Especially, if the driver does not set
> pci_dev.driver_data to it's net_device struct (such as the acenic
> driver) ?

Forget it. It depends on the driver in both directions. How would it 
handle a pci device with different L2 interfaces or a network adapter
with PCI bridge + various PCI devices behind the bridge ?

-- 
Ueimor