[PATCH 3/3 v2] dl2k: Implement suspend

Ondrej Zary
2015-11-18T21:36:43Z

Add suspend/resume support to dl2k driver.
Tested on Asus NX1101 (IP1000A) and D-Link DGE-550T (DL-2000).

Signed-off-by: Ondrej Zary <linux@rainbow-software.org>
---
drivers/net/ethernet/dlink/dl2k.c | 55 +++++++++++++++++++++++++++++++++++--
1 file changed, 53 insertions(+), 2 deletions(-)

diff --git a/drivers/net/ethernet/dlink/dl2k.c b/drivers/net/ethernet/dlink/dl2k.c
index 9e9baa0..28a96d3 100644
--- a/drivers/net/ethernet/dlink/dl2k.c
+++ b/drivers/net/ethernet/dlink/dl2k.c
@@ -464,14 +464,21 @@ static void free_list(struct net_device *dev)
}
}

+static void rio_reset_ring(struct netdev_private *np)
+{
+ np->cur_rx = 0;
+ np->cur_tx = 0;
+ np->old_rx = 0;
+ np->old_tx = 0;
+}
+
/* allocate and initialize Tx and Rx descriptors */
static int alloc_list(struct net_device *dev)
{
struct netdev_private *np = netdev_priv(dev);
int i;

- np->cur_rx = np->cur_tx = 0;
- np->old_rx = np->old_tx = 0;
+ rio_reset_ring(np);
np->rx_buf_sz = (dev->mtu <= 1500 ? PACKET_SIZE : dev->mtu + 32);

/* Initialize Tx descriptors, TFDListPtr leaves in start_xmit(). */
@@ -1824,11 +1831,55 @@ rio_remove1 (struct pci_dev *pdev)
}
}

+#ifdef CONFIG_PM_SLEEP
+static int rio_suspend(struct device *device)
+{
+ struct net_device *dev = dev_get_drvdata(device);
+ struct netdev_private *np = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return 0;
+
+ netif_device_detach(dev);
+ del_timer_sync(&np->timer);
+ rio_hw_stop(dev);
+
+ return 0;
+}
+
+static int rio_resume(struct device *device)
+{
+ struct net_device *dev = dev_get_drvdata(device);
+ struct netdev_private *np = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return 0;
+
+ rio_reset_ring(np);
+ rio_hw_init(dev);
+ np->timer.expires = jiffies + 1 * HZ;
+ add_timer(&np->timer);
+ netif_device_attach(dev);
+ dl2k_enable_int(np);
+
+ return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(rio_pm_ops, rio_suspend, rio_resume);
+#define RIO_PM_OPS (&rio_pm_ops)
+
+#else
+
+#define RIO_PM_OPS NULL
+
+#endif /* CONFIG_PM_SLEEP */
+
static struct pci_driver rio_driver = {
.name = "dl2k",
.id_table = rio_pci_tbl,
.probe = rio_probe1,
.remove = rio_remove1,
+ .driver.pm = RIO_PM_OPS,
};

module_pci_driver(rio_driver);
--
Ondrej Zary