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Merge branch 'pci/resource'

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- Protect pci_reassign_bridge_resources() against concurrent
    addition/removal (Benjamin Herrenschmidt)

  - Fix bridge dma_ranges resource list cleanup (Rob Herring)

  - Add PCI_STD_NUM_BARS for the number of standard BARs (Denis Efremov)

  - Add "pci=hpmmiosize" and "pci=hpmmioprefsize" parameters to control the
    MMIO and prefetchable MMIO window sizes of hotplug bridges
    independently (Nicholas Johnson)

  - Fix MMIO/MMIO_PREF window assignment that assigned more space than
    desired (Nicholas Johnson)

  - Only enforce bus numbers from bridge EA if the bridge has EA devices
    downstream (Subbaraya Sundeep)

* pci/resource:
  PCI: Do not use bus number zero from EA capability
  PCI: Avoid double hpmemsize MMIO window assignment
  PCI: Add "pci=hpmmiosize" and "pci=hpmmioprefsize" parameters
  PCI: Add PCI_STD_NUM_BARS for the number of standard BARs
  PCI: Fix missing bridge dma_ranges resource list cleanup
  PCI: Protect pci_reassign_bridge_resources() against concurrent addition/removal
This commit is contained in:
Bjorn Helgaas
2019-11-28 08:54:36 -06:00
parent 7cfe16393c 73884a7082
commit 774800cb09
50 changed files with 195 additions and 147 deletions
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17
drivers/pci/probe.c
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@@ -573,6 +573,7 @@ static void devm_pci_release_host_bridge_dev(struct device *dev)
bridge->release_fn(bridge);
pci_free_resource_list(&bridge->windows);
pci_free_resource_list(&bridge->dma_ranges);
}
static void pci_release_host_bridge_dev(struct device *dev)
@@ -1093,14 +1094,15 @@ static unsigned int pci_scan_child_bus_extend(struct pci_bus *bus,
* @sec: updated with secondary bus number from EA
* @sub: updated with subordinate bus number from EA
*
* If @dev is a bridge with EA capability, update @sec and @sub with
* fixed bus numbers from the capability and return true. Otherwise,
* return false.
* If @dev is a bridge with EA capability that specifies valid secondary
* and subordinate bus numbers, return true with the bus numbers in @sec
* and @sub. Otherwise return false.
*/
static bool pci_ea_fixed_busnrs(struct pci_dev *dev, u8 *sec, u8 *sub)
{
int ea, offset;
u32 dw;
u8 ea_sec, ea_sub;
if (dev->hdr_type != PCI_HEADER_TYPE_BRIDGE)
return false;
@@ -1112,8 +1114,13 @@ static bool pci_ea_fixed_busnrs(struct pci_dev *dev, u8 *sec, u8 *sub)
offset = ea + PCI_EA_FIRST_ENT;
pci_read_config_dword(dev, offset, &dw);
*sec = dw & PCI_EA_SEC_BUS_MASK;
*sub = (dw & PCI_EA_SUB_BUS_MASK) >> PCI_EA_SUB_BUS_SHIFT;
ea_sec = dw & PCI_EA_SEC_BUS_MASK;
ea_sub = (dw & PCI_EA_SUB_BUS_MASK) >> PCI_EA_SUB_BUS_SHIFT;
if (ea_sec == 0 || ea_sub < ea_sec)
return false;
*sec = ea_sec;
*sub = ea_sub;
return true;
}