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Commit 8e2773ae authored by Shannon Nelson's avatar Shannon Nelson Committed by Jeff Kirsher
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i40e: add wake-on-lan support 



Wake on LAN is disabled by default and will remain that way for most
platforms, but there is an NVM setting that allows vendors to enable it
for a port if they think they've provided the right power environment
for the device.  This patch adds code to check the NVM setting and enable
Magic Packet use if WoL is enabled for the port.

Since only Magic Packet is supported, there's not a lot of HW configuration
needed.

Change-Id: I44e904a7b15695e34683009f487064cd86ea59b0
Signed-off-by: default avatarShannon Nelson <shannon.nelson@intel.com>
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Tested-by: default avatarKavindya Deegala <kavindya.s.deegala@intel.com>
Signed-off-by: default avatarJeff Kirsher <jeffrey.t.kirsher@intel.com>
parent d4dfb81a

drivers/net/ethernet/intel/i40e/i40e.h

+1 −0
Original line number Diff line number Diff line
@@ -205,6 +205,7 @@ struct i40e_pf { 
	u16 rss_size_max;          /* HW defined max RSS queues */

	u16 fdir_pf_filter_count;  /* num of guaranteed filters for this PF */

	u8 atr_sample_rate;

	bool wol_en;



	enum i40e_interrupt_policy int_policy;

	u16 rx_itr_default;

drivers/net/ethernet/intel/i40e/i40e_ethtool.c

+40 −2
Original line number Diff line number Diff line
@@ -844,8 +844,45 @@ static void i40e_diag_test(struct net_device *netdev, 
static void i40e_get_wol(struct net_device *netdev,

			 struct ethtool_wolinfo *wol)

{

	struct i40e_netdev_priv *np = netdev_priv(netdev);

	struct i40e_pf *pf = np->vsi->back;

	struct i40e_hw *hw = &pf->hw;

	u16 wol_nvm_bits;



	/* NVM bit on means WoL disabled for the port */

	i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);

	if ((1 << hw->port) & wol_nvm_bits) {

		wol->supported = 0;

		wol->wolopts = 0;

	} else {

		wol->supported = WAKE_MAGIC;

		wol->wolopts = (pf->wol_en ? WAKE_MAGIC : 0);

	}

}



static int i40e_set_wol(struct net_device *netdev, struct ethtool_wolinfo *wol)

{

	struct i40e_netdev_priv *np = netdev_priv(netdev);

	struct i40e_pf *pf = np->vsi->back;

	struct i40e_hw *hw = &pf->hw;

	u16 wol_nvm_bits;



	/* NVM bit on means WoL disabled for the port */

	i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);

	if (((1 << hw->port) & wol_nvm_bits))

		return -EOPNOTSUPP;



	/* only magic packet is supported */

	if (wol->wolopts && (wol->wolopts != WAKE_MAGIC))

		return -EOPNOTSUPP;



	/* is this a new value? */

	if (pf->wol_en != !!wol->wolopts) {

		pf->wol_en = !!wol->wolopts;

		device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);

	}



	return 0;

}



static int i40e_nway_reset(struct net_device *netdev)
@@ -1568,6 +1605,7 @@ static const struct ethtool_ops i40e_ethtool_ops = { 
	.nway_reset		= i40e_nway_reset,

	.get_link		= ethtool_op_get_link,

	.get_wol		= i40e_get_wol,

	.set_wol		= i40e_set_wol,

	.get_eeprom_len		= i40e_get_eeprom_len,

	.get_eeprom		= i40e_get_eeprom,

	.get_ringparam		= i40e_get_ringparam,

drivers/net/ethernet/intel/i40e/i40e_main.c

+14 −2
Original line number Diff line number Diff line
@@ -7537,6 +7537,10 @@ static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 
	pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;

	pf->link_check_timeout = jiffies;



	/* WoL defaults to disabled */

	pf->wol_en = false;

	device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);



	/* set up the main switch operations */

	i40e_determine_queue_usage(pf);

	i40e_init_interrupt_scheme(pf);
@@ -7858,6 +7862,7 @@ static void i40e_pci_error_resume(struct pci_dev *pdev) 
static void i40e_shutdown(struct pci_dev *pdev)

{

	struct i40e_pf *pf = pci_get_drvdata(pdev);

	struct i40e_hw *hw = &pf->hw;



	set_bit(__I40E_SUSPENDED, &pf->state);

	set_bit(__I40E_DOWN, &pf->state);
@@ -7865,8 +7870,11 @@ static void i40e_shutdown(struct pci_dev *pdev) 
	i40e_prep_for_reset(pf);

	rtnl_unlock();



	wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));

	wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));



	if (system_state == SYSTEM_POWER_OFF) {

		pci_wake_from_d3(pdev, false);    /* No WoL support yet */

		pci_wake_from_d3(pdev, pf->wol_en);

		pci_set_power_state(pdev, PCI_D3hot);

	}

}
@@ -7879,6 +7887,7 @@ static void i40e_shutdown(struct pci_dev *pdev) 
static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)

{

	struct i40e_pf *pf = pci_get_drvdata(pdev);

	struct i40e_hw *hw = &pf->hw;



	set_bit(__I40E_SUSPENDED, &pf->state);

	set_bit(__I40E_DOWN, &pf->state);
@@ -7886,7 +7895,10 @@ static int i40e_suspend(struct pci_dev *pdev, pm_message_t state) 
	i40e_prep_for_reset(pf);

	rtnl_unlock();



	pci_wake_from_d3(pdev, false);    /* No WoL support yet */

	wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));

	wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));



	pci_wake_from_d3(pdev, pf->wol_en);

	pci_set_power_state(pdev, PCI_D3hot);



	return 0;

drivers/net/ethernet/intel/i40e/i40e_type.h

+1 −0
Original line number Diff line number Diff line
@@ -1022,6 +1022,7 @@ struct i40e_hw_port_stats { 
#define I40E_SR_NVM_CONTROL_WORD		0x00

#define I40E_SR_EMP_MODULE_PTR			0x0F

#define I40E_SR_NVM_IMAGE_VERSION		0x18

#define I40E_SR_NVM_WAKE_ON_LAN			0x19

#define I40E_SR_ALTERNATE_SAN_MAC_ADDRESS_PTR	0x27

#define I40E_SR_NVM_EETRACK_LO			0x2D

#define I40E_SR_NVM_EETRACK_HI			0x2E