[PATCH] e1000: the power down when running ifdown command

[PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Hi all

I'm trying to modify e1000 driver for power saving.

The e1000 driver doesn't let the power down when running ifdown command.
So, I set to the D3hot state of a PCI device at the end of e1000_close().

With this modification, e1000 driver reduces power by ifdown
to the same level as link-down case.

I spoke it in Collaboration Summit 2009.
For details and result of power measurement,
please refer the 36-38 page of following document.
http://events.linuxfoundation.org/archive/lfcs09_ooiwa.pdf

Could you please check the my patch ?

Should I consider WOL ?
Dosen't E1000_PCI_POWER_SAVE need ?


Hi Vaidy

I was glad that you talked to me in Collaboration Summit.
I'm sorry for sending the patch so late.

I found a bug in the patch which I used in Collaboration Summit.
Sometimes, it's don't work to auto-negotiation by repeated ifup and ifdown.

I fixed it. I'd appreciate it if you could test.


Thanks you.
Naohiro Ooiwa

Signed-off-by: Naohiro Ooiwa <nooiwa@miraclelinux.com>
---
 drivers/net/e1000/e1000_main.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index bcd192c..12e1a42 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -26,6 +26,11 @@

 *******************************************************************************/

+/*
+ * define this if you want pci save power while ifdown.
+ */
+#define E1000_PCI_POWER_SAVE
+
 #include "e1000.h"
 #include <net/ip6_checksum.h>

@@ -1248,6 +1253,23 @@ static int e1000_open(struct net_device *netdev)
 	struct e1000_hw *hw = &adapter->hw;
 	int err;

+#ifdef E1000_PCI_POWER_SAVE
+	struct pci_dev *pdev = adapter->pdev;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	if (adapter->need_ioport)
+		err = pci_enable_device(pdev);
+	else
+		err = pci_enable_device_mem(pdev);
+	if (err) {
+		printk(KERN_ERR "e1000: Cannot enable PCI device from power-save\n");
+		return err;
+	}
+	pci_set_master(pdev);
+#endif
+
 	/* disallow open during test */
 	if (test_bit(__E1000_TESTING, &adapter->flags))
 		return -EBUSY;
@@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
 		goto err_setup_rx;

 	e1000_power_up_phy(adapter);
+	e1000_reset(adapter);

 	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 	if ((hw->mng_cookie.status &
@@ -1341,6 +1364,15 @@ static int e1000_close(struct net_device *netdev)
 		e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
 	}

+#ifdef E1000_PCI_POWER_SAVE
+#ifdef CONFIG_PM
+	pci_save_state(adapter->pdev);
+#endif
+	pci_disable_device(adapter->pdev);
+	pci_wake_from_d3(adapter->pdev, true);
+	pci_set_power_state(adapter->pdev, PCI_D3hot);
+#endif
+
 	return 0;
 }

-- 
1.5.4.1

[PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

I resend the mail to maintainers of the e1000 driver.
and Andrew CC-ed.

-------- Original Message --------

Hi all

I'm trying to modify e1000 driver for power saving.

The e1000 driver doesn't let the power down when running ifdown command.
So, I set to the D3hot state of a PCI device at the end of e1000_close().

With this modification, e1000 driver reduces power by ifdown
to the same level as link-down case.

I spoke it in Collaboration Summit 2009.
For details and result of power measurement,
please refer the 36-38 page of following document.
http://events.linuxfoundation.org/archive/lfcs09_ooiwa.pdf

Could you please check the my patch ?

Should I consider WOL ?
Dosen't E1000_PCI_POWER_SAVE need ?


Thanks you.
Naohiro Ooiwa

Signed-off-by: Naohiro Ooiwa <nooiwa@miraclelinux.com>
---
 drivers/net/e1000/e1000_main.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index bcd192c..12e1a42 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -26,6 +26,11 @@

 *******************************************************************************/

+/*
+ * define this if you want pci save power while ifdown.
+ */
+#define E1000_PCI_POWER_SAVE
+
 #include "e1000.h"
 #include <net/ip6_checksum.h>

@@ -1248,6 +1253,23 @@ static int e1000_open(struct net_device *netdev)
 	struct e1000_hw *hw = &adapter->hw;
 	int err;

+#ifdef E1000_PCI_POWER_SAVE
+	struct pci_dev *pdev = adapter->pdev;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	if (adapter->need_ioport)
+		err = pci_enable_device(pdev);
+	else
+		err = pci_enable_device_mem(pdev);
+	if (err) {
+		printk(KERN_ERR "e1000: Cannot enable PCI device from power-save\n");
+		return err;
+	}
+	pci_set_master(pdev);
+#endif
+
 	/* disallow open during test */
 	if (test_bit(__E1000_TESTING, &adapter->flags))
 		return -EBUSY;
@@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
 		goto err_setup_rx;

 	e1000_power_up_phy(adapter);
+	e1000_reset(adapter);

 	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 	if ((hw->mng_cookie.status &
@@ -1341,6 +1364,15 @@ static int e1000_close(struct net_device *netdev)
 		e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
 	}

+#ifdef E1000_PCI_POWER_SAVE
+#ifdef CONFIG_PM
+	pci_save_state(adapter->pdev);
+#endif
+	pci_disable_device(adapter->pdev);
+	pci_wake_from_d3(adapter->pdev, true);
+	pci_set_power_state(adapter->pdev, PCI_D3hot);
+#endif
+
 	return 0;
 }

-- 
1.5.4.1

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[PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Hi All

I resend my patch.
Sorry, my previous mail lacked an explanation.


The e1000 driver doesn't let the power down when running ifdown command.
So, I set to the D3hot state of a PCI device at the end of e1000_close().

With this modification, e1000 driver reduces power by ifdown.
It's about 6 watts when I measured a total power of one server machine
in my environment.

I tested this patch. The result is good enough to me.

Could you please check my patch ?
If I should have other considerations, please tell me.


Thanks you.
Naohiro Ooiwa



Signed-off-by: Naohiro Ooiwa <nooiwa@miraclelinux.com>
---
 drivers/net/e1000/e1000_main.c |   32 ++++++++++++++++++++++++++++++++
 1 files changed, 32 insertions(+), 0 deletions(-)

diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
index bcd192c..12e1a42 100644
--- a/drivers/net/e1000/e1000_main.c
+++ b/drivers/net/e1000/e1000_main.c
@@ -26,6 +26,11 @@

 *******************************************************************************/

+/*
+ * define this if you want pci save power while ifdown.
+ */
+#define E1000_PCI_POWER_SAVE
+
 #include "e1000.h"
 #include <net/ip6_checksum.h>

@@ -1248,6 +1253,23 @@ static int e1000_open(struct net_device *netdev)
 	struct e1000_hw *hw = &adapter->hw;
 	int err;

+#ifdef E1000_PCI_POWER_SAVE
+	struct pci_dev *pdev = adapter->pdev;
+
+	pci_set_power_state(pdev, PCI_D0);
+	pci_restore_state(pdev);
+
+	if (adapter->need_ioport)
+		err = pci_enable_device(pdev);
+	else
+		err = pci_enable_device_mem(pdev);
+	if (err) {
+		printk(KERN_ERR "e1000: Cannot enable PCI device from power-save\n");
+		return err;
+	}
+	pci_set_master(pdev);
+#endif
+
 	/* disallow open during test */
 	if (test_bit(__E1000_TESTING, &adapter->flags))
 		return -EBUSY;
@@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
 		goto err_setup_rx;

 	e1000_power_up_phy(adapter);
+	e1000_reset(adapter);

 	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
 	if ((hw->mng_cookie.status &
@@ -1341,6 +1364,15 @@ static int e1000_close(struct net_device *netdev)
 		e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
 	}

+#ifdef E1000_PCI_POWER_SAVE
+#ifdef CONFIG_PM
+	pci_save_state(adapter->pdev);
+#endif
+	pci_disable_device(adapter->pdev);
+	pci_wake_from_d3(adapter->pdev, true);
+	pci_set_power_state(adapter->pdev, PCI_D3hot);
+#endif
+
 	return 0;
 }

-- 
1.5.4.1

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Re: [PATCH] e1000: the power down when running ifdown command

[Stephen Hemminger]

On Sat, 31 Oct 2009 18:39:52 +0900
Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:

> Hi All
> 
> I resend my patch.
> Sorry, my previous mail lacked an explanation.
> 
> 
> The e1000 driver doesn't let the power down when running ifdown command.
> So, I set to the D3hot state of a PCI device at the end of e1000_close().
> 
> With this modification, e1000 driver reduces power by ifdown.
> It's about 6 watts when I measured a total power of one server machine
> in my environment.
> 
> I tested this patch. The result is good enough to me.
> 
> Could you please check my patch ?
> If I should have other considerations, please tell me.
> 


Does this work with Wake On Lan? 

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Re: [PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Stephen Hemminger wrote:
> On Sat, 31 Oct 2009 18:39:52 +0900
> Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:
> 
>> Hi All
>>
>> I resend my patch.
>> Sorry, my previous mail lacked an explanation.
>>
>>
>> The e1000 driver doesn't let the power down when running ifdown command.
>> So, I set to the D3hot state of a PCI device at the end of e1000_close().
>>
>> With this modification, e1000 driver reduces power by ifdown.
>> It's about 6 watts when I measured a total power of one server machine
>> in my environment.
>>
>> I tested this patch. The result is good enough to me.
>>
>> Could you please check my patch ?
>> If I should have other considerations, please tell me.
>>

Hi Stephen

Thank you so much for your reply.

> Does this work with Wake On Lan? 

Yes, it works WOL.
But I worry that my test is enough.

They are following:
  - simple data transmission after ifdown;ifup.
  - enable wol, ifup network device, system shutdown, and make sure wol work.
  - enable wol, ifdown network device, system shutdown, and make sure wol work.
  - while [ 0 ] ; do ifdown eth0 ; ifup eth0 ; done
  - while [ 0 ] ; do modprobe e1000 ; rmmod e1000 ; done


> @@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
>  		goto err_setup_rx;
>
>  	e1000_power_up_phy(adapter);
> +	e1000_reset(adapter);
>
>  	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
>  	if ((hw->mng_cookie.status &

This code fix problem that e1000 driver doesn't work to auto-negotiation
once in a while.
Maybe, the cause is that set state to D0 just before it.
I found it by repeat of ifup and ifdown.

If you find out other points and any necessary tests from my patch,
please tell me. I will make sure them.

Thanks you.
Naohiro Ooiwa

Re: [PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Naohiro Ooiwa wrote:
> Stephen Hemminger wrote:
>> On Sat, 31 Oct 2009 18:39:52 +0900
>> Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:
>>
>> Does this work with Wake On Lan? 
> 
> Yes, it works WOL.

Sorry, I made a mistake.
The WOL doesn't work when my patch applied to kernel.
I wasn't myself.

I consider the WOL and I will resent the patch.
Thank you for your point.


thanks,
Naohiro Ooiwa


> But I worry that my test is enough.
> 
> They are following:
>   - simple data transmission after ifdown;ifup.
>   - enable wol, ifup network device, system shutdown, and make sure wol work.
>   - enable wol, ifdown network device, system shutdown, and make sure wol work.
>   - while [ 0 ] ; do ifdown eth0 ; ifup eth0 ; done
>   - while [ 0 ] ; do modprobe e1000 ; rmmod e1000 ; done
> 
> 
>> @@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
>>  		goto err_setup_rx;
>>
>>  	e1000_power_up_phy(adapter);
>> +	e1000_reset(adapter);
>>
>>  	adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
>>  	if ((hw->mng_cookie.status &
> 
> This code fix problem that e1000 driver doesn't work to auto-negotiation
> once in a while.
> Maybe, the cause is that set state to D0 just before it.
> I found it by repeat of ifup and ifdown.
> 
> If you find out other points and any necessary tests from my patch,
> please tell me. I will make sure them.
> 
> Thanks you.
> Naohiro Ooiwa
> 
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> To unsubscribe from this list: send the line "unsubscribe netdev" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html
> 

Re: [PATCH] e1000: the power down when running ifdown command

[Stephen Hemminger]

On Wed, 04 Nov 2009 19:23:43 +0900
Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:

> Naohiro Ooiwa wrote:
> > Stephen Hemminger wrote:
> >> On Sat, 31 Oct 2009 18:39:52 +0900
> >> Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:
> >>
> >> Does this work with Wake On Lan? 
> > 
> > Yes, it works WOL.
> 
> Sorry, I made a mistake.
> The WOL doesn't work when my patch applied to kernel.
> I wasn't myself.
> 
> I consider the WOL and I will resent the patch.
> Thank you for your point.
> 
> 
> thanks,
> Naohiro Ooiwa


Good, thank you for checking. I like the idea of powering down the
PHY. Some of the drivers have shutdown hooks to power PHY back on
during shutdown to enable WOL.


-- 

Re: [PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Stephen Hemminger wrote:
> On Wed, 04 Nov 2009 19:23:43 +0900
> Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:
> 
>> Naohiro Ooiwa wrote:
>>> Stephen Hemminger wrote:
>>>> On Sat, 31 Oct 2009 18:39:52 +0900
>>>> Naohiro Ooiwa <nooiwa@miraclelinux.com> wrote:
>>>>
>>>> Does this work with Wake On Lan? 
>>> Yes, it works WOL.
>> Sorry, I made a mistake.
>> The WOL doesn't work when my patch applied to kernel.
>> I wasn't myself.
>>
>> I consider the WOL and I will resent the patch.
>> Thank you for your point.
>>
>>
>> thanks,
>> Naohiro Ooiwa
> 
> 
> Good, thank you for checking. I like the idea of powering down the
> PHY. Some of the drivers have shutdown hooks to power PHY back on
> during shutdown to enable WOL.
> 

Thank you so much for your infomation.
Oh, The shutdown hooks is useful.


Thanks.
Naohiro Ooiwa

Re: [PATCH] e1000: the power down when running ifdown command

[Jeff Kirsher]

2009/10/31 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
> Hi All
>
> I resend my patch.
> Sorry, my previous mail lacked an explanation.
>
>
> The e1000 driver doesn't let the power down when running ifdown command.
> So, I set to the D3hot state of a PCI device at the end of e1000_close().
>
> With this modification, e1000 driver reduces power by ifdown.
> It's about 6 watts when I measured a total power of one server machine
> in my environment.
>
> I tested this patch. The result is good enough to me.
>
> Could you please check my patch ?
> If I should have other considerations, please tell me.
>
>
> Thanks you.
> Naohiro Ooiwa
>
>
>
> Signed-off-by: Naohiro Ooiwa <nooiwa@miraclelinux.com>
> ---
>  drivers/net/e1000/e1000_main.c |   32 ++++++++++++++++++++++++++++++++
>  1 files changed, 32 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
> index bcd192c..12e1a42 100644
> --- a/drivers/net/e1000/e1000_main.c
> +++ b/drivers/net/e1000/e1000_main.c
> @@ -26,6 +26,11 @@
>
>  *******************************************************************************/
>
> +/*
> + * define this if you want pci save power while ifdown.
> + */
> +#define E1000_PCI_POWER_SAVE
> +
>  #include "e1000.h"
>  #include <net/ip6_checksum.h>
>
> @@ -1248,6 +1253,23 @@ static int e1000_open(struct net_device *netdev)
>        struct e1000_hw *hw = &adapter->hw;
>        int err;
>
> +#ifdef E1000_PCI_POWER_SAVE
> +       struct pci_dev *pdev = adapter->pdev;
> +
> +       pci_set_power_state(pdev, PCI_D0);
> +       pci_restore_state(pdev);
> +
> +       if (adapter->need_ioport)
> +               err = pci_enable_device(pdev);
> +       else
> +               err = pci_enable_device_mem(pdev);
> +       if (err) {
> +               printk(KERN_ERR "e1000: Cannot enable PCI device from power-save\n");
> +               return err;
> +       }
> +       pci_set_master(pdev);
> +#endif
> +
>        /* disallow open during test */
>        if (test_bit(__E1000_TESTING, &adapter->flags))
>                return -EBUSY;
> @@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
>                goto err_setup_rx;
>
>        e1000_power_up_phy(adapter);
> +       e1000_reset(adapter);
>
>        adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
>        if ((hw->mng_cookie.status &
> @@ -1341,6 +1364,15 @@ static int e1000_close(struct net_device *netdev)
>                e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
>        }
>
> +#ifdef E1000_PCI_POWER_SAVE
> +#ifdef CONFIG_PM
> +       pci_save_state(adapter->pdev);
> +#endif
> +       pci_disable_device(adapter->pdev);
> +       pci_wake_from_d3(adapter->pdev, true);
> +       pci_set_power_state(adapter->pdev, PCI_D3hot);
> +#endif
> +
>        return 0;
>  }
>

I have added this patch to my tree for testing.  This patch requires a
fair amount of regression testing, so once its passed testing I will
push the patch to David/netdev.

-- 
Cheers,
Jeff

Re: [PATCH] e1000: the power down when running ifdown command

[Dan Williams]

On Mon, 2009-11-02 at 16:26 -0800, Jeff Kirsher wrote:
> 2009/10/31 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
> > Hi All
> >
> > I resend my patch.
> > Sorry, my previous mail lacked an explanation.
> >
> >
> > The e1000 driver doesn't let the power down when running ifdown command.
> > So, I set to the D3hot state of a PCI device at the end of e1000_close().
> >
> > With this modification, e1000 driver reduces power by ifdown.
> > It's about 6 watts when I measured a total power of one server machine
> > in my environment.
> >
> > I tested this patch. The result is good enough to me.
> >
> > Could you please check my patch ?
> > If I should have other considerations, please tell me.
> >
> >
> > Thanks you.
> > Naohiro Ooiwa
> >
> >
> >
> > Signed-off-by: Naohiro Ooiwa <nooiwa@miraclelinux.com>
> > ---
> >  drivers/net/e1000/e1000_main.c |   32 ++++++++++++++++++++++++++++++++
> >  1 files changed, 32 insertions(+), 0 deletions(-)
> >
> > diff --git a/drivers/net/e1000/e1000_main.c b/drivers/net/e1000/e1000_main.c
> > index bcd192c..12e1a42 100644
> > --- a/drivers/net/e1000/e1000_main.c
> > +++ b/drivers/net/e1000/e1000_main.c
> > @@ -26,6 +26,11 @@
> >
> >  *******************************************************************************/
> >
> > +/*
> > + * define this if you want pci save power while ifdown.
> > + */
> > +#define E1000_PCI_POWER_SAVE
> > +
> >  #include "e1000.h"
> >  #include <net/ip6_checksum.h>
> >
> > @@ -1248,6 +1253,23 @@ static int e1000_open(struct net_device *netdev)
> >        struct e1000_hw *hw = &adapter->hw;
> >        int err;
> >
> > +#ifdef E1000_PCI_POWER_SAVE
> > +       struct pci_dev *pdev = adapter->pdev;
> > +
> > +       pci_set_power_state(pdev, PCI_D0);
> > +       pci_restore_state(pdev);
> > +
> > +       if (adapter->need_ioport)
> > +               err = pci_enable_device(pdev);
> > +       else
> > +               err = pci_enable_device_mem(pdev);
> > +       if (err) {
> > +               printk(KERN_ERR "e1000: Cannot enable PCI device from power-save\n");
> > +               return err;
> > +       }
> > +       pci_set_master(pdev);
> > +#endif
> > +
> >        /* disallow open during test */
> >        if (test_bit(__E1000_TESTING, &adapter->flags))
> >                return -EBUSY;
> > @@ -1265,6 +1287,7 @@ static int e1000_open(struct net_device *netdev)
> >                goto err_setup_rx;
> >
> >        e1000_power_up_phy(adapter);
> > +       e1000_reset(adapter);
> >
> >        adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
> >        if ((hw->mng_cookie.status &
> > @@ -1341,6 +1364,15 @@ static int e1000_close(struct net_device *netdev)
> >                e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
> >        }
> >
> > +#ifdef E1000_PCI_POWER_SAVE
> > +#ifdef CONFIG_PM
> > +       pci_save_state(adapter->pdev);
> > +#endif
> > +       pci_disable_device(adapter->pdev);
> > +       pci_wake_from_d3(adapter->pdev, true);
> > +       pci_set_power_state(adapter->pdev, PCI_D3hot);
> > +#endif
> > +
> >        return 0;
> >  }
> >
> 
> I have added this patch to my tree for testing.  This patch requires a
> fair amount of regression testing, so once its passed testing I will
> push the patch to David/netdev.

Can we get rid of E1000_PCI_POWER_SAVE and just enable this
unconditionally once it's baked?  Having the define there is pretty
superfluous right now.  Either that, or make it
CONFIG_E1000_PCI_POWER_SAVE and make a Kconfig option for it that
depends on experimental or something.  Or a module parameter.  Or
something other than a dangling #define :)

Dan



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Re: [PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Jeff Kirsher wrote:
> 2009/10/31 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
> 
> I have added this patch to my tree for testing.  This patch requires a
> fair amount of regression testing, so once its passed testing I will
> push the patch to David/netdev.

I appreciate the marge your tree.
If there is anything I can do, please let me know.

And I know this patch is good for e100 driver too.
I would really like to create patch for it.
How do you think about e100 driver.


Thanks,
Naohiro Ooiwa

Re: [PATCH] e1000: the power down when running ifdown command

[Jeff Kirsher]

2009/11/3 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
> Jeff Kirsher wrote:
>> 2009/10/31 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
>>
>> I have added this patch to my tree for testing.  This patch requires a
>> fair amount of regression testing, so once its passed testing I will
>> push the patch to David/netdev.
>
> I appreciate the marge your tree.
> If there is anything I can do, please let me know.
>
> And I know this patch is good for e100 driver too.
> I would really like to create patch for it.
> How do you think about e100 driver.
>
>
> Thanks,
> Naohiro Ooiwa
>

Patches are always welcome (referring to a e100 patch).

As far as the e1000 patch goes, it has a number of issues which were
found in testing.  Here are just a few problems we saw:
1. ethtool -t - crashes the system
2. ethtool eth0 - always shows link/speed as 1000/Full even when there
is no cable
3. ethtool -s eth0 autoneg on/off - system hang. Sometimes a copper
interface will show up as fiber after this.
4. ethtool -d/-S/-g etc - will corrupt the stats of the interface
while doing ifup/down

So it appears that more needs to be done to the driver to get this to
work as expected.

NAK

-- 
Cheers,
Jeff

Re: [PATCH] e1000: the power down when running ifdown command

[Naohiro Ooiwa]

Jeff Kirsher wrote:
> 2009/11/3 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
>> Jeff Kirsher wrote:
>>> 2009/10/31 Naohiro Ooiwa <nooiwa@miraclelinux.com>:
>>>
>>> I have added this patch to my tree for testing.  This patch requires a
>>> fair amount of regression testing, so once its passed testing I will
>>> push the patch to David/netdev.
>> I appreciate the marge your tree.
>> If there is anything I can do, please let me know.
>>
>> And I know this patch is good for e100 driver too.
>> I would really like to create patch for it.
>> How do you think about e100 driver.
>>
>>
>> Thanks,
>> Naohiro Ooiwa
>>
> 
> Patches are always welcome (referring to a e100 patch).

I am happy that you should say that.
I will try to create a patch for e100, e1000e, igb and ixgbe.
Before that, I should fix the following problems.


> As far as the e1000 patch goes, it has a number of issues which were
> found in testing.  Here are just a few problems we saw:
> 1. ethtool -t - crashes the system
> 2. ethtool eth0 - always shows link/speed as 1000/Full even when there
> is no cable
> 3. ethtool -s eth0 autoneg on/off - system hang. Sometimes a copper
> interface will show up as fiber after this.
> 4. ethtool -d/-S/-g etc - will corrupt the stats of the interface
> while doing ifup/down

Thank you for your tests.
Oh, My patch is full of problem.
The rest is my work.

I will resend the patch after test of all ethtool's options.
At that time, I will tell you contents of my tests.

And I sad WOL works on my patch in previous mail.
But WOL doesn't work. Sorry, I wasn't myself.
I will fix it too.

> 
> So it appears that more needs to be done to the driver to get this to
> work as expected.
> 
> NAK
>