1. 30 Apr, 2012 1 commit
    • Bjorn Helgaas's avatar
      PCI: work around Stratus ftServer broken PCIe hierarchy · 284f5f9d
      Bjorn Helgaas authored
      A PCIe downstream port is a P2P bridge.  Its secondary interface is
      a link that should lead only to device 0 (unless ARI is enabled)[1], so
      we don't probe for non-zero device numbers.
      
      Some Stratus ftServer systems have a PCIe downstream port (02:00.0) that
      leads to both an upstream port (03:00.0) and a downstream port (03:01.0),
      and 03:01.0 has important devices below it:
      
        [0000:02]-+-00.0-[03-3c]--+-00.0-[04-09]--...
                                  \-01.0-[0a-0d]--+-[USB]
                                                  +-[NIC]
                                                  +-...
      
      Previously, we didn't enumerate device 03:01.0, so USB and the network
      didn't work.  This patch adds a DMI quirk to scan all device numbers,
      not just 0, below a downstream port.
      
      Based on a patch by Prarit Bhargava.
      
      [1] PCIe spec r3.0, sec 7.3.1
      
      CC: Myron Stowe <mstowe@redhat.com>
      CC: Don Dutile <ddutile@redhat.com>
      CC: James Paradis <james.paradis@stratus.com>
      CC: Matthew Wilcox <matthew.r.wilcox@intel.com>
      CC: Jesse Barnes <jbarnes@virtuousgeek.org>
      CC: Prarit Bhargava <prarit@redhat.com>
      Signed-off-by: default avatarBjorn Helgaas <bhelgaas@google.com>
      284f5f9d
  2. 21 Apr, 2012 23 commits
  3. 20 Apr, 2012 14 commits
  4. 19 Apr, 2012 2 commits