#include <linux/errno.h>
#include <linux/pm.h>
#include <linux/init.h>
-#include <linux/slab.h>
#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"
*/
#define DRIVER_VERSION "v1.0"
#define DRIVER_AUTHOR "tom.l.nguyen@intel.com"
-#define DRIVER_DESC "PCIE Port Bus Driver"
+#define DRIVER_DESC "PCIe Port Bus Driver"
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 const char device_name[] = "pcieport-driver";
static int pcie_portdrv_restore_config(struct pci_dev *dev)
{
}
#ifdef CONFIG_PM
-static int pcie_portdrv_suspend(struct pci_dev *dev, pm_message_t state)
-{
- return pcie_port_device_suspend(dev, state);
+static const struct dev_pm_ops pcie_portdrv_pm_ops = {
+ .suspend = pcie_port_device_suspend,
+ .resume = pcie_port_device_resume,
+ .freeze = pcie_port_device_suspend,
+ .thaw = pcie_port_device_resume,
+ .poweroff = pcie_port_device_suspend,
+ .restore = pcie_port_device_resume,
+};
-}
+#define PCIE_PORTDRV_PM_OPS (&pcie_portdrv_pm_ops)
-static int pcie_portdrv_resume(struct pci_dev *dev)
-{
- pci_set_master(dev);
- return pcie_port_device_resume(dev);
-}
-#else
-#define pcie_portdrv_suspend NULL
-#define pcie_portdrv_resume NULL
-#endif
+#else /* !PM */
+
+#define PCIE_PORTDRV_PM_OPS NULL
+#endif /* !PM */
/*
* pcie_portdrv_probe - Probe PCI-Express port devices
* @dev: PCI-Express port device being probed
*
- * If detected invokes the pcie_port_device_register() method for
+ * If detected invokes the pcie_port_device_register() method for
* this port device.
*
*/
-static int __devinit pcie_portdrv_probe (struct pci_dev *dev,
- const struct pci_device_id *id )
+static int __devinit pcie_portdrv_probe(struct pci_dev *dev,
+ const struct pci_device_id *id)
{
- int status;
+ int status;
- status = pcie_port_device_probe(dev);
- if (status)
- return status;
+ if (!pci_is_pcie(dev) ||
+ ((dev->pcie_type != PCI_EXP_TYPE_ROOT_PORT) &&
+ (dev->pcie_type != PCI_EXP_TYPE_UPSTREAM) &&
+ (dev->pcie_type != PCI_EXP_TYPE_DOWNSTREAM)))
+ return -ENODEV;
- if (!dev->irq && dev->pin) {
+ if (!dev->irq && dev->pin) {
dev_warn(&dev->dev, "device [%04x:%04x] has invalid IRQ; "
"check vendor BIOS\n", dev->vendor, dev->device);
}
return 0;
}
-static void pcie_portdrv_remove (struct pci_dev *dev)
+static void pcie_portdrv_remove(struct pci_dev *dev)
{
pcie_port_device_remove(dev);
pci_disable_device(dev);
- kfree(pci_get_drvdata(dev));
}
static int error_detected_iter(struct device *device, void *data)
static pci_ers_result_t pcie_portdrv_error_detected(struct pci_dev *dev,
enum pci_channel_state error)
{
- struct aer_broadcast_data result_data =
- {error, PCI_ERS_RESULT_CAN_RECOVER};
- int retval;
+ struct aer_broadcast_data data = {error, PCI_ERS_RESULT_CAN_RECOVER};
+ int ret;
/* can not fail */
- retval = device_for_each_child(&dev->dev, &result_data, error_detected_iter);
+ ret = device_for_each_child(&dev->dev, &data, error_detected_iter);
- return result_data.result;
+ return data.result;
}
static int mmio_enabled_iter(struct device *device, void *data)
static pci_ers_result_t pcie_portdrv_slot_reset(struct pci_dev *dev)
{
- pci_ers_result_t status = PCI_ERS_RESULT_NONE;
+ pci_ers_result_t status = PCI_ERS_RESULT_RECOVERED;
int retval;
/* If fatal, restore cfg space for possible link reset at upstream */
if (dev->error_state == pci_channel_io_frozen) {
+ dev->state_saved = true;
pci_restore_state(dev);
pcie_portdrv_restore_config(dev);
pci_enable_pcie_error_reporting(dev);
};
static struct pci_driver pcie_portdriver = {
- .name = (char *)device_name,
+ .name = "pcieport",
.id_table = &port_pci_ids[0],
.probe = pcie_portdrv_probe,
.remove = pcie_portdrv_remove,
- .suspend = pcie_portdrv_suspend,
- .resume = pcie_portdrv_resume,
-
.err_handler = &pcie_portdrv_err_handler,
+
+ .driver.pm = PCIE_PORTDRV_PM_OPS,
+};
+
+static int __init dmi_pcie_pme_disable_msi(const struct dmi_system_id *d)
+{
+ pr_notice("%s detected: will not use MSI for PCIe PME signaling\n",
+ d->ident);
+ pcie_pme_disable_msi();
+ return 0;
+}
+
+static struct dmi_system_id __initdata pcie_portdrv_dmi_table[] = {
+ /*
+ * Boxes that should not use MSI for PCIe PME signaling.
+ */
+ {
+ .callback = dmi_pcie_pme_disable_msi,
+ .ident = "MSI Wind U-100",
+ .matches = {
+ DMI_MATCH(DMI_SYS_VENDOR,
+ "MICRO-STAR INTERNATIONAL CO., LTD"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "U-100"),
+ },
+ },
+ {}
};
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();
if (retval) {
printk(KERN_WARNING "PCIE: bus_register error: %d\n", retval);
return retval;
}
-static void __exit pcie_portdrv_exit(void)
+static void __exit pcie_portdrv_exit(void)
{
pci_unregister_driver(&pcie_portdriver);
pcie_port_bus_unregister();