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i40e: support for suspend and resume

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Add basic support for handling suspend and resume.  We'll add
Wake-on-LAN support later.

Change-Id: Iea5e11c81bd9289a5bdbf086de8f626911a0b5ce
Signed-off-by: Shannon Nelson <shannon.nelson@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: Kavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
This commit is contained in:
Shannon Nelson 2013-11-26 10:49:23 +00:00 committed by Jeff Kirsher
parent 233261867f
commit 9007bccd30
2 changed files with 97 additions and 1 deletions
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1
drivers/net/ethernet/intel/i40e/i40e.h
View File

@ -133,6 +133,7 @@ enum i40e_state_t {
__I40E_GLOBAL_RESET_REQUESTED,
__I40E_EMP_RESET_REQUESTED,
__I40E_FILTER_OVERFLOW_PROMISC,
__I40E_SUSPENDED,
};
enum i40e_interrupt_policy {

97
drivers/net/ethernet/intel/i40e/i40e_main.c
View File

@ -7749,7 +7749,11 @@ static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
/* shutdown all operations */
i40e_pf_quiesce_all_vsi(pf);
if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
rtnl_lock();
i40e_prep_for_reset(pf);
rtnl_unlock();
}
/* Request a slot reset */
return PCI_ERS_RESULT_NEED_RESET;
@ -7812,9 +7816,95 @@ static void i40e_pci_error_resume(struct pci_dev *pdev)
struct i40e_pf *pf = pci_get_drvdata(pdev);
dev_info(&pdev->dev, "%s\n", __func__);
if (test_bit(__I40E_SUSPENDED, &pf->state))
return;
rtnl_lock();
i40e_handle_reset_warning(pf);
rtnl_lock();
}
/**
* i40e_shutdown - PCI callback for shutting down
* @pdev: PCI device information struct
**/
static void i40e_shutdown(struct pci_dev *pdev)
{
struct i40e_pf *pf = pci_get_drvdata(pdev);
set_bit(__I40E_SUSPENDED, &pf->state);
set_bit(__I40E_DOWN, &pf->state);
rtnl_lock();
i40e_prep_for_reset(pf);
rtnl_unlock();
if (system_state == SYSTEM_POWER_OFF) {
pci_wake_from_d3(pdev, false); /* No WoL support yet */
pci_set_power_state(pdev, PCI_D3hot);
}
}
#ifdef CONFIG_PM
/**
* i40e_suspend - PCI callback for moving to D3
* @pdev: PCI device information struct
**/
static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
{
struct i40e_pf *pf = pci_get_drvdata(pdev);
set_bit(__I40E_SUSPENDED, &pf->state);
set_bit(__I40E_DOWN, &pf->state);
rtnl_lock();
i40e_prep_for_reset(pf);
rtnl_unlock();
pci_wake_from_d3(pdev, false); /* No WoL support yet */
pci_set_power_state(pdev, PCI_D3hot);
return 0;
}
/**
* i40e_resume - PCI callback for waking up from D3
* @pdev: PCI device information struct
**/
static int i40e_resume(struct pci_dev *pdev)
{
struct i40e_pf *pf = pci_get_drvdata(pdev);
u32 err;
pci_set_power_state(pdev, PCI_D0);
pci_restore_state(pdev);
/* pci_restore_state() clears dev->state_saves, so
* call pci_save_state() again to restore it.
*/
pci_save_state(pdev);
err = pci_enable_device_mem(pdev);
if (err) {
dev_err(&pdev->dev,
"%s: Cannot enable PCI device from suspend\n",
__func__);
return err;
}
pci_set_master(pdev);
/* no wakeup events while running */
pci_wake_from_d3(pdev, false);
/* handling the reset will rebuild the device state */
if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
clear_bit(__I40E_DOWN, &pf->state);
rtnl_lock();
i40e_reset_and_rebuild(pf, false);
rtnl_unlock();
}
return 0;
}
#endif
static const struct pci_error_handlers i40e_err_handler = {
.error_detected = i40e_pci_error_detected,
.slot_reset = i40e_pci_error_slot_reset,
@ -7826,6 +7916,11 @@ static struct pci_driver i40e_driver = {
.id_table = i40e_pci_tbl,
.probe = i40e_probe,
.remove = i40e_remove,
#ifdef CONFIG_PM
.suspend = i40e_suspend,
.resume = i40e_resume,
#endif
.shutdown = i40e_shutdown,
.err_handler = &i40e_err_handler,
.sriov_configure = i40e_pci_sriov_configure,
};