diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 4 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv.h | 12 | ||||
| -rw-r--r-- | drivers/pci/pcie/portdrv_core.c | 16 |
3 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 033d4e69b43b..7fb7a4b161ff 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -2118,6 +2118,10 @@ bytes respectively. Such letter suffixes can also be entirely omitted. force Enable ASPM even on devices that claim not to support it. WARNING: Forcing ASPM on may cause system lockups. + pcie_hp= [PCIE] PCI Express Hotplug driver options: + nomsi Do not use MSI for PCI Express Native Hotplug (this + makes all PCIe ports use INTx for hotplug services). + pcie_ports= [PCIE] PCIe ports handling: auto Ask the BIOS whether or not to use native PCIe services associated with PCIe ports (PME, hot-plug, AER). Use diff --git a/drivers/pci/pcie/portdrv.h b/drivers/pci/pcie/portdrv.h index bd00a01aef14..eea2ca2375e6 100644 --- a/drivers/pci/pcie/portdrv.h +++ b/drivers/pci/pcie/portdrv.h @@ -34,6 +34,18 @@ struct pci_dev; extern void pcie_clear_root_pme_status(struct pci_dev *dev); +#ifdef CONFIG_HOTPLUG_PCI_PCIE +extern bool pciehp_msi_disabled; + +static inline bool pciehp_no_msi(void) +{ + return pciehp_msi_disabled; +} + +#else /* !CONFIG_HOTPLUG_PCI_PCIE */ +static inline bool pciehp_no_msi(void) { return false; } +#endif /* !CONFIG_HOTPLUG_PCI_PCIE */ + #ifdef CONFIG_PCIE_PME extern bool pcie_pme_msi_disabled; diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c index 595654a1a6a6..2f589a54f9bd 100644 --- a/drivers/pci/pcie/portdrv_core.c +++ b/drivers/pci/pcie/portdrv_core.c @@ -19,6 +19,17 @@ #include "../pci.h" #include "portdrv.h" +bool pciehp_msi_disabled; + +static int __init pciehp_setup(char *str) +{ + if (!strncmp(str, "nomsi", 5)) + pciehp_msi_disabled = true; + + return 1; +} +__setup("pcie_hp=", pciehp_setup); + /** * release_pcie_device - free PCI Express port service device structure * @dev: Port service device to release @@ -189,8 +200,9 @@ static int init_service_irqs(struct pci_dev *dev, int *irqs, int mask) { int i, irq = -1; - /* We have to use INTx if MSI cannot be used for PCIe PME. */ - if ((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) { + /* We have to use INTx if MSI cannot be used for PCIe PME or pciehp. */ + if (((mask & PCIE_PORT_SERVICE_PME) && pcie_pme_no_msi()) || + ((mask & PCIE_PORT_SERVICE_HP) && pciehp_no_msi())) { if (dev->pin) irq = dev->irq; goto no_msi; |