Date: Fri, 10 Dec 2010 00:43:40 +0600 From: Eugene Grosbein <egrosbein@rdtc.ru> To: Jack Vogel <jfvogel@gmail.com> Cc: bzeeb-lists@lists.zabbadoz.net, Mike Tancsa <mike@sentex.net>, freebsd-net <freebsd-net@freebsd.org> Subject: Re: [patch] Bring link down when interface goes down Message-ID: <4D01235C.4050803@rdtc.ru> In-Reply-To: <4CFCCD94.60100@rdtc.ru> References: <AANLkTimWVJhtu8LrZ_tn0Tdr-vs9PmPnW9SjebT7jnyM@mail.gmail.com> <AANLkTik%2B4Ag1HYXDWJvn2fTx6M%2Bpa9o29-A8j6qVRhZ_@mail.gmail.com> <AANLkTikwcRW%2BdqY=NTSbJsr3daEd-8usPo0Rw%2BhA_D-8@mail.gmail.com> <AANLkTin3%2BbCaXoPxTQsvzmqgtpA1zSY8f17Qh-nqymPw@mail.gmail.com> <201011270946271408828@yahoo.com.cn> <AANLkTikG8RJQw%2Bh1SHZPs1cHGrM%2B3LfniZrdLqVoPVtr@mail.gmail.com> <AANLkTi=YjG40%2BDj7471wyv3aeXGJgoL1GC33iNaypsrW@mail.gmail.com> <AANLkTi=LgejYxRXnxLtkvB-Qfp2u%2BtySdriWHfGWPQjL@mail.gmail.com> <20101128081617.GA90332@zibbi.meraka.csir.co.za> <AANLkTinF1fovumkeXxWgaKi_bNiUCnqgWAtdaCaXELzO@mail.gmail.com> <4CF73A2C.7000802@rdtc.ru> <4CF89EE7.8020807@rdtc.ru> <AANLkTi=6N3Rz57YVNF1ZiDGEexnEXWr6oNPz9F=c2GpA@mail.gmail.com> <4CF93A77.30804@rdtc.ru> <4CF9470F.4020709@sentex.net> <4CF947D4.10504@rdtc.ru> <AANLkTin7hfqqwkudNHhrsyS_O7_-PCXffAWT1N85i31f@mail.gmail.com> <4CFA0435.7020100@rdtc.ru> <AANLkTim_%2BYOvUgBAveciSoWUiGL46068ieHAEhYsU8kT@mail.gmail.com> <4CFCCD94.60100@rdtc.ru>
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On 06.12.2010 17:48, Eugene Grosbein wrote:
> On 04.12.2010 15:08, Jack Vogel wrote:
>> This isn't some simple 'go change this line or parameter',
>> there were some problematic issues that my Linux coworkers
>> faced, I have to go look into it before I even decide...
>>
>> so...patience friend.
>
> For igb(4) the change seems pretty short. At least, it works
> for my 82576-based dual-port copper card.
[skip]
>
> However, similar patch applied to em(4) does not work
> for my on-board 82574L-based cards: e1000_power_down_phy()
> thanslates to e1000_power_down_phy_copper_82571() that does nothing
> because mac->ops.check_mng_mode(hw) returns true value
> and, therefore, e1000_power_down_phy_copper(hw) is not even called.
>
> Still trying to find a way...
I've written a patch for em(4) that works for my 82573L and 82574L-based
systems. By default, ifconfig down does not affect link (POLA issue).
After sysctl dev.em.0.down_disables_link=1 it does.
Still do not know how to disable "management mode" on my cards
so patch just ignores it when sysctl turned on. Dirty hack, I guess.
--- sys/dev/e1000/if_em.h.orig 2010-12-06 12:45:53.000000000 +0600
+++ sys/dev/e1000/if_em.h 2010-12-08 20:11:05.000000000 +0600
@@ -436,6 +436,9 @@
unsigned long link_irq;
struct e1000_hw_stats stats;
+
+ /* Bring link down when interface goes down */
+ int down_disables_link;
};
/********************************************************************************
--- sys/dev/e1000/if_em.c.orig 2010-12-06 12:47:51.000000000 +0600
+++ sys/dev/e1000/if_em.c 2010-12-08 20:46:02.000000000 +0600
@@ -452,6 +452,13 @@
OID_AUTO, "debug", CTLTYPE_INT|CTLFLAG_RW, adapter, 0,
em_sysctl_debug_info, "I", "Debug Information");
+ adapter->down_disables_link = 0;
+ SYSCTL_ADD_INT(device_get_sysctl_ctx(dev),
+ SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
+ OID_AUTO, "down_disables_link", CTLTYPE_INT|CTLFLAG_RW,
+ &adapter->down_disables_link, adapter->down_disables_link,
+ "Bring link down when interface goes down");
+
callout_init_mtx(&adapter->timer, &adapter->core_mtx, 0);
/* Determine hardware and mac info */
@@ -1266,6 +1273,8 @@
}
/* Initialize the hardware */
+ if (!adapter->hw.phy.reset_disable)
+ e1000_phy_hw_reset(&adapter->hw);
em_reset(adapter);
em_update_link_status(adapter);
@@ -2319,6 +2328,19 @@
e1000_led_off(&adapter->hw);
e1000_cleanup_led(&adapter->hw);
+
+ if(adapter->down_disables_link) {
+ /* Bring physical link down by powering the phy down */
+/* e1000_power_down_phy(&adapter->hw); */
+ e1000_power_down_phy_copper(&adapter->hw);
+
+ /* Update system interface state */
+ adapter->hw.mac.get_link_status = 1;
+ em_update_link_status(adapter);
+
+ /* Reset the phy next time init gets called */
+ adapter->hw.phy.reset_disable = FALSE;
+ }
}
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