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Message-Id: <200708142009.03272.rjw@sisk.pl>
Date: Tue, 14 Aug 2007 20:09:02 +0200
From: "Rafael J. Wysocki" <rjw@...k.pl>
To: Jeff Garzik <jeff@...zik.org>
Cc: Kyle McMartin <kyle@...artin.ca>,
LKML <linux-kernel@...r.kernel.org>,
pm list <linux-pm@...ts.linux-foundation.org>,
Grant Grundler <grundler@...isc-linux.org>
Subject: Re: [RFC][PATCH] uli526x: Add suspend and resume routines (updated)
On Tuesday, 14 August 2007 07:58, Jeff Garzik wrote:
> Rafael J. Wysocki wrote:
> > On Wednesday, 8 August 2007 00:26, Jeff Garzik wrote:
> >> Rafael J. Wysocki wrote:
> >>> On Tuesday, 7 August 2007 23:40, Jeff Garzik wrote:
> >>>> I'll let our new tulip maintainer see what he thinks about the
> >>>> implementation. Seems fairly sane to me, but should at least get an "it
> >>>> works" test.
> >>> It has been tested, as stated in the changelog, and works (on my test system).
[--snip--]
> Two comments:
>
> 1) Like akpm, the CONFIG_PM_SLEEP is out of place. All other drivers
> use CONFIG_PM
OK
> 2) just remove the !dev checks, that is an impossible condition
OK
Updated patch follows.
---
From: Rafael J. Wysocki <rjw@...k.pl>
Add suspend/resume support to the uli526x network driver (tested on x86_64,
with 'Ethernet controller: ALi Corporation M5263 Ethernet Controller, rev 40').
This patch is based on the suspend/resume code in the tg3 driver.
Signed-off-by: Rafael J. Wysocki <rjw@...k.pl>
---
drivers/net/tulip/uli526x.c | 108 +++++++++++++++++++++++++++++++++++++++++---
1 file changed, 102 insertions(+), 6 deletions(-)
Index: linux-2.6.23-rc3/drivers/net/tulip/uli526x.c
===================================================================
--- linux-2.6.23-rc3.orig/drivers/net/tulip/uli526x.c
+++ linux-2.6.23-rc3/drivers/net/tulip/uli526x.c
@@ -1110,19 +1110,15 @@ static void uli526x_timer(unsigned long
/*
- * Dynamic reset the ULI526X board
* Stop ULI526X board
* Free Tx/Rx allocated memory
- * Reset ULI526X board
- * Re-initialize ULI526X board
+ * Init system variable
*/
-static void uli526x_dynamic_reset(struct net_device *dev)
+static void uli526x_reset_prepare(struct net_device *dev)
{
struct uli526x_board_info *db = netdev_priv(dev);
- ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
-
/* Sopt MAC controller */
db->cr6_data &= ~(CR6_RXSC | CR6_TXSC); /* Disable Tx/Rx */
update_cr6(db->cr6_data, dev->base_addr);
@@ -1141,6 +1137,22 @@ static void uli526x_dynamic_reset(struct
db->link_failed = 1;
db->init=1;
db->wait_reset = 0;
+}
+
+
+/*
+ * Dynamic reset the ULI526X board
+ * Stop ULI526X board
+ * Free Tx/Rx allocated memory
+ * Reset ULI526X board
+ * Re-initialize ULI526X board
+ */
+
+static void uli526x_dynamic_reset(struct net_device *dev)
+{
+ ULI526X_DBUG(0, "uli526x_dynamic_reset()", 0);
+
+ uli526x_reset_prepare(dev);
/* Re-initialize ULI526X board */
uli526x_init(dev);
@@ -1150,6 +1162,88 @@ static void uli526x_dynamic_reset(struct
}
+#ifdef CONFIG_PM
+
+/*
+ * Suspend the interface.
+ */
+
+static int uli526x_suspend(struct pci_dev *pdev, pm_message_t state)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ pci_power_t power_state;
+ int err;
+
+ ULI526X_DBUG(0, "uli526x_suspend", 0);
+
+ if (!netdev_priv(dev))
+ return 0;
+
+ pci_save_state(pdev);
+
+ if (!netif_running(dev))
+ return 0;
+
+ netif_device_detach(dev);
+ uli526x_reset_prepare(dev);
+
+ power_state = pci_choose_state(pdev, state);
+ pci_enable_wake(pdev, power_state, 0);
+ err = pci_set_power_state(pdev, power_state);
+ if (err) {
+ netif_device_attach(dev);
+ /* Re-initialize ULI526X board */
+ uli526x_init(dev);
+ /* Restart upper layer interface */
+ netif_wake_queue(dev);
+ }
+
+ return err;
+}
+
+/*
+ * Resume the interface.
+ */
+
+static int uli526x_resume(struct pci_dev *pdev)
+{
+ struct net_device *dev = pci_get_drvdata(pdev);
+ int err;
+
+ ULI526X_DBUG(0, "uli526x_resume", 0);
+
+ if (!netdev_priv(dev))
+ return 0;
+
+ pci_restore_state(pdev);
+
+ if (!netif_running(dev))
+ return 0;
+
+ err = pci_set_power_state(pdev, PCI_D0);
+ if (err) {
+ printk(KERN_WARNING "%s: Could not put device into D0\n",
+ dev->name);
+ return err;
+ }
+
+ netif_device_attach(dev);
+ /* Re-initialize ULI526X board */
+ uli526x_init(dev);
+ /* Restart upper layer interface */
+ netif_wake_queue(dev);
+
+ return 0;
+}
+
+#else /* !CONFIG_PM */
+
+#define uli526x_suspend NULL
+#define uli526x_resume NULL
+
+#endif /* !CONFIG_PM */
+
+
/*
* free all allocated rx buffer
*/
@@ -1689,6 +1783,8 @@ static struct pci_driver uli526x_driver
.id_table = uli526x_pci_tbl,
.probe = uli526x_init_one,
.remove = __devexit_p(uli526x_remove_one),
+ .suspend = uli526x_suspend,
+ .resume = uli526x_resume,
};
MODULE_AUTHOR("Peer Chen, peer.chen@....com.tw");
-
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