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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 <bhelgaas@google.com>
This commit is contained in:
Bjorn Helgaas 2015-10-29 17:35:40 -05:00
parent 26635112d4
commit 597becb4ad
1 changed files with 14 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/pci/pci.c
View File

@ -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;
}