sfc: Add power-management and wake-on-LAN support

Wake-on-LAN is a stub for Falcon, but will be implemented fully for
new NICs.

Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

4 files changed, 146 insertions, 0 deletions

diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 14ef27fa8416..b016719d8f67 100644
--- a/drivers/net/sfc/efx.c
+++ b/drivers/net/sfc/efx.c
@@ -2243,11 +2243,107 @@ static int __devinit efx_pci_probe(struct pci_dev *pci_dev,
         return rc;
 }
 
+static int efx_pm_freeze(struct device *dev)
+{
+        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
+
+        efx->state = STATE_FINI;
+
+        netif_device_detach(efx->net_dev);
+
+        efx_stop_all(efx);
+        efx_fini_channels(efx);
+
+        return 0;
+}
+
+static int efx_pm_thaw(struct device *dev)
+{
+        struct efx_nic *efx = pci_get_drvdata(to_pci_dev(dev));
+
+        efx->state = STATE_INIT;
+
+        efx_init_channels(efx);
+
+        mutex_lock(&efx->mac_lock);
+        efx->phy_op->reconfigure(efx);
+        mutex_unlock(&efx->mac_lock);
+
+        efx_start_all(efx);
+
+        netif_device_attach(efx->net_dev);
+
+        efx->state = STATE_RUNNING;
+
+        efx->type->resume_wol(efx);
+
+        return 0;
+}
+
+static int efx_pm_poweroff(struct device *dev)
+{
+        struct pci_dev *pci_dev = to_pci_dev(dev);
+        struct efx_nic *efx = pci_get_drvdata(pci_dev);
+
+        efx->type->fini(efx);
+
+        efx->reset_pending = RESET_TYPE_NONE;
+
+        pci_save_state(pci_dev);
+        return pci_set_power_state(pci_dev, PCI_D3hot);
+}
+
+/* Used for both resume and restore */
+static int efx_pm_resume(struct device *dev)
+{
+        struct pci_dev *pci_dev = to_pci_dev(dev);
+        struct efx_nic *efx = pci_get_drvdata(pci_dev);
+        int rc;
+
+        rc = pci_set_power_state(pci_dev, PCI_D0);
+        if (rc)
+                return rc;
+        pci_restore_state(pci_dev);
+        rc = pci_enable_device(pci_dev);
+        if (rc)
+                return rc;
+        pci_set_master(efx->pci_dev);
+        rc = efx->type->reset(efx, RESET_TYPE_ALL);
+        if (rc)
+                return rc;
+        rc = efx->type->init(efx);
+        if (rc)
+                return rc;
+        efx_pm_thaw(dev);
+        return 0;
+}
+
+static int efx_pm_suspend(struct device *dev)
+{
+        int rc;
+
+        efx_pm_freeze(dev);
+        rc = efx_pm_poweroff(dev);
+        if (rc)
+                efx_pm_resume(dev);
+        return rc;
+}
+
+static struct dev_pm_ops efx_pm_ops = {
+        .suspend        = efx_pm_suspend,
+        .resume         = efx_pm_resume,
+        .freeze         = efx_pm_freeze,
+        .thaw           = efx_pm_thaw,
+        .poweroff       = efx_pm_poweroff,
+        .restore        = efx_pm_resume,
+};
+
 static struct pci_driver efx_pci_driver = {
         .name           = EFX_DRIVER_NAME,
         .id_table       = efx_pci_table,
         .probe          = efx_pci_probe,
         .remove         = efx_pci_remove,
+        .driver.pm      = &efx_pm_ops,
 };
 
 /**************************************************************************
diff --git a/drivers/net/sfc/ethtool.c b/drivers/net/sfc/ethtool.c
index d95d0fa399ff..b4c6ea1b9c07 100644
--- a/drivers/net/sfc/ethtool.c
+++ b/drivers/net/sfc/ethtool.c
@@ -739,6 +739,21 @@ static void efx_ethtool_get_pauseparam(struct net_device *net_dev,
 }
 
 
+static void efx_ethtool_get_wol(struct net_device *net_dev,
+                                struct ethtool_wolinfo *wol)
+{
+        struct efx_nic *efx = netdev_priv(net_dev);
+        return efx->type->get_wol(efx, wol);
+}
+
+
+static int efx_ethtool_set_wol(struct net_device *net_dev,
+                               struct ethtool_wolinfo *wol)
+{
+        struct efx_nic *efx = netdev_priv(net_dev);
+        return efx->type->set_wol(efx, wol->wolopts);
+}
+
 const struct ethtool_ops efx_ethtool_ops = {
         .get_settings           = efx_ethtool_get_settings,
         .set_settings           = efx_ethtool_set_settings,
@@ -767,4 +782,6 @@ const struct ethtool_ops efx_ethtool_ops = {
         .get_strings            = efx_ethtool_get_strings,
         .phys_id                = efx_ethtool_phys_id,
         .get_ethtool_stats      = efx_ethtool_get_stats,
+        .get_wol                = efx_ethtool_get_wol,
+        .set_wol                = efx_ethtool_set_wol,
 };
diff --git a/drivers/net/sfc/falcon.c b/drivers/net/sfc/falcon.c
index 3466616c01c0..8f2c58305538 100644
--- a/drivers/net/sfc/falcon.c
+++ b/drivers/net/sfc/falcon.c
@@ -3245,6 +3245,27 @@ void falcon_stop_nic_stats(struct efx_nic *efx)
 
 /**************************************************************************
  *
+ * Wake on LAN
+ *
+ **************************************************************************
+ */
+
+static void falcon_get_wol(struct efx_nic *efx, struct ethtool_wolinfo *wol)
+{
+        wol->supported = 0;
+        wol->wolopts = 0;
+        memset(&wol->sopass, 0, sizeof(wol->sopass));
+}
+
+static int falcon_set_wol(struct efx_nic *efx, u32 type)
+{
+        if (type != 0)
+                return -EINVAL;
+        return 0;
+}
+
+/**************************************************************************
+ *
  * Revision-dependent attributes used by efx.c
  *
  **************************************************************************
@@ -3266,6 +3287,9 @@ struct efx_nic_type falcon_a1_nic_type = {
         .push_irq_moderation = falcon_push_irq_moderation,
         .push_multicast_hash = falcon_push_multicast_hash,
         .reconfigure_port = falcon_reconfigure_port,
+        .get_wol = falcon_get_wol,
+        .set_wol = falcon_set_wol,
+        .resume_wol = efx_port_dummy_op_void,
         .default_mac_ops = &falcon_xmac_operations,
 
         .revision = EFX_REV_FALCON_A1,
@@ -3299,6 +3323,9 @@ struct efx_nic_type falcon_b0_nic_type = {
         .push_irq_moderation = falcon_push_irq_moderation,
         .push_multicast_hash = falcon_push_multicast_hash,
         .reconfigure_port = falcon_reconfigure_port,
+        .get_wol = falcon_get_wol,
+        .set_wol = falcon_set_wol,
+        .resume_wol = efx_port_dummy_op_void,
         .default_mac_ops = &falcon_xmac_operations,
 
         .revision = EFX_REV_FALCON_B0,
diff --git a/drivers/net/sfc/net_driver.h b/drivers/net/sfc/net_driver.h
index f63a05c4e38b..a9fde82aeeae 100644
--- a/drivers/net/sfc/net_driver.h
+++ b/drivers/net/sfc/net_driver.h
@@ -861,6 +861,9 @@ static inline const char *efx_dev_name(struct efx_nic *efx)
  * @push_irq_moderation: Apply interrupt moderation value
  * @push_multicast_hash: Apply multicast hash table
  * @reconfigure_port: Push loopback/power/txdis changes to the MAC and PHY
+ * @get_wol: Get WoL configuration from driver state
+ * @set_wol: Push WoL configuration to the NIC
+ * @resume_wol: Synchronise WoL state between driver and MC (e.g. after resume)
  * @default_mac_ops: efx_mac_operations to set at startup
  * @revision: Hardware architecture revision
  * @mem_map_size: Memory BAR mapped size
@@ -894,6 +897,9 @@ struct efx_nic_type {
         void (*push_irq_moderation)(struct efx_channel *channel);
         void (*push_multicast_hash)(struct efx_nic *efx);
         int (*reconfigure_port)(struct efx_nic *efx);
+        void (*get_wol)(struct efx_nic *efx, struct ethtool_wolinfo *wol);
+        int (*set_wol)(struct efx_nic *efx, u32 type);
+        void (*resume_wol)(struct efx_nic *efx);
         struct efx_mac_operations *default_mac_ops;
 
         int revision;