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Commit 597becb4 authored by Bjorn Helgaas's avatar Bjorn Helgaas
Browse files

PCI: Expand Enhanced Allocation BAR output 



An Enhanced Allocation Capability entry with BEI 0 fills in
dev->resource[0] just like a real BAR 0 would, but non-EA experts might not
connect "EA - BEI 0" with BAR 0.

Decode the EA jargon a little bit, e.g., change this:

  pci 0002:01:00.0: EA - BEI  0, Prop 0x00: [mem 0x84300000-0x84303fff]

to this:

  pci 0002:01:00.0: BAR 0: [mem 0x84300000-0x84303fff] (from Enhanced Allocation, properties 0x00)

Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
parent 26635112

drivers/pci/pci.c

+14 −2
Original line number Diff line number Diff line
@@ -2293,8 +2293,20 @@ static int pci_ea_read(struct pci_dev *dev, int offset) 
	res->start = start;

	res->end = end;

	res->flags = flags;

	dev_printk(KERN_DEBUG, &dev->dev, "EA - BEI %2u, Prop 0x%02x: %pR\n",

		   bei, prop, res);



	if (bei <= PCI_EA_BEI_BAR5)

		dev_printk(KERN_DEBUG, &dev->dev, "BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",

			   bei, res, prop);

	else if (bei == PCI_EA_BEI_ROM)

		dev_printk(KERN_DEBUG, &dev->dev, "ROM: %pR (from Enhanced Allocation, properties %#02x)\n",

			   res, prop);

	else if (bei >= PCI_EA_BEI_VF_BAR0 && bei <= PCI_EA_BEI_VF_BAR5)

		dev_printk(KERN_DEBUG, &dev->dev, "VF BAR %d: %pR (from Enhanced Allocation, properties %#02x)\n",

			   bei - PCI_EA_BEI_VF_BAR0, res, prop);

	else

		dev_printk(KERN_DEBUG, &dev->dev, "BEI %d res: %pR (from Enhanced Allocation, properties %#02x)\n",

			   bei, res, prop);



out:

	return offset + ent_size;

}