1. 17 7月, 2010 1 次提交
    • B
      PCI: fall back to original BIOS BAR addresses · 58c84eda
      Bjorn Helgaas 提交于
      If we fail to assign resources to a PCI BAR, this patch makes us try the
      original address from BIOS rather than leaving it disabled.
      
      Linux tries to make sure all PCI device BARs are inside the upstream
      PCI host bridge or P2P bridge apertures, reassigning BARs if necessary.
      Windows does similar reassignment.
      
      Before this patch, if we could not move a BAR into an aperture, we left
      the resource unassigned, i.e., at address zero.  Windows leaves such BARs
      at the original BIOS addresses, and this patch makes Linux do the same.
      
      This is a bit ugly because we disable the resource long before we try to
      reassign it, so we have to keep track of the BIOS BAR address somewhere.
      For lack of a better place, I put it in the struct pci_dev.
      
      I think it would be cleaner to attempt the assignment immediately when the
      claim fails, so we could easily remember the original address.  But we
      currently claim motherboard resources in the middle, after attempting to
      claim PCI resources and before assigning new PCI resources, and changing
      that is a fairly big job.
      
      Addresses https://bugzilla.kernel.org/show_bug.cgi?id=16263Reported-by: NAndrew <nitr0@seti.kr.ua>
      Tested-by: NAndrew <nitr0@seti.kr.ua>
      Signed-off-by: NBjorn Helgaas <bjorn.helgaas@hp.com>
      Signed-off-by: NJesse Barnes <jbarnes@virtuousgeek.org>
      58c84eda
  2. 12 7月, 2010 5 次提交
  3. 10 7月, 2010 2 次提交
  4. 09 7月, 2010 14 次提交
  5. 08 7月, 2010 6 次提交
  6. 07 7月, 2010 12 次提交