diff options
| author | Pali Rohár <pali@kernel.org> | 2022-02-14 12:41:08 +0100 |
|---|---|---|
| committer | Bjorn Helgaas <bhelgaas@google.com> | 2022-02-17 15:29:35 -0600 |
| commit | 904b10fb189cc15376e9bfce1ef0282e68b0b004 (patch) | |
| tree | 9a1ab805b9ce6975818b590b820fbb0e6e01da56 /drivers/pci/controller/dwc/pci-meson.c | |
| parent | e783362eb54cd99b2cac8b3a9aeac942e6f6ac07 (diff) | |
| download | linux-904b10fb189cc15376e9bfce1ef0282e68b0b004.tar.bz2 | |
PCI: Add defines for normal and subtractive PCI bridges
Add these PCI class codes to pci_ids.h:
PCI_CLASS_BRIDGE_PCI_NORMAL
PCI_CLASS_BRIDGE_PCI_SUBTRACTIVE
Use these defines in all kernel code for describing PCI class codes for
normal and subtractive PCI bridges.
[bhelgaas: similar change in pci-mvebu.c]
Link: https://lore.kernel.org/r/20220214114109.26809-1-pali@kernel.org
Signed-off-by: Pali Rohár <pali@kernel.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Diffstat (limited to 'drivers/pci/controller/dwc/pci-meson.c')
| -rw-r--r-- | drivers/pci/controller/dwc/pci-meson.c | 16 |
1 files changed, 8 insertions, 8 deletions
diff --git a/drivers/pci/controller/dwc/pci-meson.c b/drivers/pci/controller/dwc/pci-meson.c index 686ded034f22..f44bf347904a 100644 --- a/drivers/pci/controller/dwc/pci-meson.c +++ b/drivers/pci/controller/dwc/pci-meson.c @@ -313,14 +313,14 @@ static int meson_pcie_rd_own_conf(struct pci_bus *bus, u32 devfn, * cannot program the PCI_CLASS_DEVICE register, so we must fabricate * the return value in the config accessors. */ - if (where == PCI_CLASS_REVISION && size == 4) - *val = (PCI_CLASS_BRIDGE_PCI << 16) | (*val & 0xffff); - else if (where == PCI_CLASS_DEVICE && size == 2) - *val = PCI_CLASS_BRIDGE_PCI; - else if (where == PCI_CLASS_DEVICE && size == 1) - *val = PCI_CLASS_BRIDGE_PCI & 0xff; - else if (where == PCI_CLASS_DEVICE + 1 && size == 1) - *val = (PCI_CLASS_BRIDGE_PCI >> 8) & 0xff; + if ((where & ~3) == PCI_CLASS_REVISION) { + if (size <= 2) + *val = (*val & ((1 << (size * 8)) - 1)) << (8 * (where & 3)); + *val &= ~0xffffff00; + *val |= PCI_CLASS_BRIDGE_PCI_NORMAL << 8; + if (size <= 2) + *val = (*val >> (8 * (where & 3))) & ((1 << (size * 8)) - 1); + } return PCIBIOS_SUCCESSFUL; } |