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: Bjorn Helgaas <[email protected]>
mig · Oct 29, 2015 · 597becb · 597becb
1 parent 2663511
commit 597becb
Showing 1 changed file with 14 additions and 2 deletions.
diff --git a/drivers/pci/pci.c b/drivers/pci/pci.c
@@ -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;
 }