diff options
Diffstat (limited to 'drivers/pci/pcie/portdrv_pci.c')
| -rw-r--r-- | drivers/pci/pcie/portdrv_pci.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/drivers/pci/pcie/portdrv_pci.c b/drivers/pci/pcie/portdrv_pci.c index 3debed25e46..f9033e190fb 100644 --- a/drivers/pci/pcie/portdrv_pci.c +++ b/drivers/pci/pcie/portdrv_pci.c @@ -15,6 +15,7 @@ #include <linux/pcieport_if.h> #include <linux/aer.h> #include <linux/dmi.h> +#include <linux/pci-aspm.h> #include "portdrv.h" #include "aer/aerdrv.h" @@ -29,6 +30,31 @@ MODULE_AUTHOR(DRIVER_AUTHOR); MODULE_DESCRIPTION(DRIVER_DESC); MODULE_LICENSE("GPL"); +/* If this switch is set, PCIe port native services should not be enabled. */ +bool pcie_ports_disabled; + +/* + * If this switch is set, ACPI _OSC will be used to determine whether or not to + * enable PCIe port native services. + */ +bool pcie_ports_auto = true; + +static int __init pcie_port_setup(char *str) +{ + if (!strncmp(str, "compat", 6)) { + pcie_ports_disabled = true; + } else if (!strncmp(str, "native", 6)) { + pcie_ports_disabled = false; + pcie_ports_auto = false; + } else if (!strncmp(str, "auto", 4)) { + pcie_ports_disabled = false; + pcie_ports_auto = true; + } + + return 1; +} +__setup("pcie_ports=", pcie_port_setup); + /* global data */ static int pcie_portdrv_restore_config(struct pci_dev *dev) @@ -301,6 +327,11 @@ static int __init pcie_portdrv_init(void) { int retval; + if (pcie_ports_disabled) { + pcie_no_aspm(); + return -EACCES; + } + dmi_check_system(pcie_portdrv_dmi_table); retval = pcie_port_bus_register(); @@ -315,11 +346,4 @@ static int __init pcie_portdrv_init(void) return retval; } -static void __exit pcie_portdrv_exit(void) -{ - pci_unregister_driver(&pcie_portdriver); - pcie_port_bus_unregister(); -} - module_init(pcie_portdrv_init); -module_exit(pcie_portdrv_exit); |