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Date: Sun, 29 Nov 2009 13:43:07 +0000
From: Ben Hutchings <bhutchings@...arflare.com>
To: David Miller <davem@...emloft.net>
Cc: netdev@...r.kernel.org, linux-net-drivers@...arflare.com
Subject: [PATCH 07/12] 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@...arflare.com>
---
drivers/net/sfc/efx.c | 96 ++++++++++++++++++++++++++++++++++++++++++
drivers/net/sfc/ethtool.c | 17 +++++++
drivers/net/sfc/falcon.c | 27 ++++++++++++
drivers/net/sfc/net_driver.h | 6 +++
4 files changed, 146 insertions(+), 0 deletions(-)
diff --git a/drivers/net/sfc/efx.c b/drivers/net/sfc/efx.c
index 14ef27f..b016719 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 d95d0fa..b4c6ea1 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 3466616..8f2c583 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 f63a05c..a9fde82 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;
--
1.6.5.3
--
Ben Hutchings, Senior Software Engineer, Solarflare Communications
Not speaking for my employer; that's the marketing department's job.
They asked us to note that Solarflare product names are trademarked.
--
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