PCI: Expand Enhanced Allocation BAR output (597becb4) · Commits · 戴 / test

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:

Bjorn Helgaas <bhelgaas@google.com>

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;
		}

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