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Merge branch 'pci/resource'

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- Clean up devm_of_pci_get_host_bridge_resources() resource allocation
    (Jan Kiszka)

  - Fixup resizable BARs after suspend/resume (Christian König)

  - Make "pci=earlydump" generic (Sinan Kaya)

  - Fix ROM BAR access routines to stay in bounds and check for signature
    correctly (Rex Zhu)

* pci/resource:
  PCI: Make pci_get_rom_size() static
  PCI: Add check code for last image indicator not set
  PCI: Avoid accessing memory outside the ROM BAR
  PCI: Make early dump functionality generic
  PCI: Cleanup PCI_REBAR_CTRL_BAR_SHIFT handling
  PCI: Restore resized BAR state on resume
  PCI: Clean up resource allocation in devm_of_pci_get_host_bridge_resources()

# Conflicts:
#	Documentation/admin-guide/kernel-parameters.txt
This commit is contained in:
Bjorn Helgaas
2018-08-15 14:59:01 -05:00
parent c689209be2 783e84961b
commit 5fc054a544
12 changed files with 71 additions and 72 deletions
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37
drivers/pci/pci.c
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@@ -114,6 +114,9 @@ static bool pcie_ari_disabled;
/* If set, the PCIe ATS capability will not be used. */
static bool pcie_ats_disabled;
/* If set, the PCI config space of each device is printed during boot. */
bool pci_early_dump;
bool pci_ats_disabled(void)
{
return pcie_ats_disabled;
@@ -1332,6 +1335,33 @@ static void pci_restore_config_space(struct pci_dev *pdev)
}
}
static void pci_restore_rebar_state(struct pci_dev *pdev)
{
unsigned int pos, nbars, i;
u32 ctrl;
pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_REBAR);
if (!pos)
return;
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
nbars = (ctrl & PCI_REBAR_CTRL_NBAR_MASK) >>
PCI_REBAR_CTRL_NBAR_SHIFT;
for (i = 0; i < nbars; i++, pos += 8) {
struct resource *res;
int bar_idx, size;
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
bar_idx = ctrl & PCI_REBAR_CTRL_BAR_IDX;
res = pdev->resource + bar_idx;
size = order_base_2((resource_size(res) >> 20) | 1) - 1;
ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE;
ctrl |= size << PCI_REBAR_CTRL_BAR_SHIFT;
pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
}
}
/**
* pci_restore_state - Restore the saved state of a PCI device
* @dev: - PCI device that we're dealing with
@@ -1347,6 +1377,7 @@ void pci_restore_state(struct pci_dev *dev)
pci_restore_pri_state(dev);
pci_restore_ats_state(dev);
pci_restore_vc_state(dev);
pci_restore_rebar_state(dev);
pci_cleanup_aer_error_status_regs(dev);
@@ -3311,7 +3342,7 @@ int pci_rebar_get_current_size(struct pci_dev *pdev, int bar)
return pos;
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
return (ctrl & PCI_REBAR_CTRL_BAR_SIZE) >> 8;
return (ctrl & PCI_REBAR_CTRL_BAR_SIZE) >> PCI_REBAR_CTRL_BAR_SHIFT;
}
/**
@@ -3334,7 +3365,7 @@ int pci_rebar_set_size(struct pci_dev *pdev, int bar, int size)
pci_read_config_dword(pdev, pos + PCI_REBAR_CTRL, &ctrl);
ctrl &= ~PCI_REBAR_CTRL_BAR_SIZE;
ctrl |= size << 8;
ctrl |= size << PCI_REBAR_CTRL_BAR_SHIFT;
pci_write_config_dword(pdev, pos + PCI_REBAR_CTRL, ctrl);
return 0;
}
@@ -6060,6 +6091,8 @@ static int __init pci_setup(char *str)
pcie_ats_disabled = true;
} else if (!strcmp(str, "noaer")) {
pci_no_aer();
} else if (!strcmp(str, "earlydump")) {
pci_early_dump = true;
} else if (!strncmp(str, "realloc=", 8)) {
pci_realloc_get_opt(str + 8);
} else if (!strncmp(str, "realloc", 7)) {