Date: Fri, 26 Jun 2009 11:36:26 -0700 From: Mark Atkinson <atkin901@yahoo.com> To: freebsd-net@freebsd.org Subject: Re: Regression: em driver in -CURRENT, "Invalid MAC address" Message-ID: <h234fa$cob$1@ger.gmane.org> References: <gthe3t$822$1@ger.gmane.org> <2a41acea0905020803s63b69b1awb39538f000f5bd5a@mail.gmail.com>
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Jack Vogel wrote:
> I'm willing to bet that its in fact the same problem that VMWare is
> having. Our method of getting the mac address changed, and the emulations
> seem to be unprepared for it.
>
> This was done for a real customer requirement to allow support of
> alternate mac addressing in firmware. What happens now is a warm reset of
> the hardware is done, followed by reading the RAR[0] register. In a real
> Intel NIC the mac
> address will be valid in that register, but in VMWare, and I'm willing to
> bet in
> VirtualBox as well, its 0.
>
> VMWare also has 3 choices of device (wow, amazing coincidence :), can
> you tell me when you pick e1000 what real adapter it claims to emulate?
>
> I am considering options for this problem. The one I lean toward right now
> is to make a "legacy" em driver, it will have support for ONLY pre-PCI
> Express
> hardware, it will be frozen as it were, the idea is that with no new work
> on it
> it will not suffer from any regression type failures. If I do this, there
> are some
> strategy issues, and its those I'm thinking about.
>
> In any case, I intend to have this problem resolved for 8's release. Stay
> tuned.
Just FYI. this is a real machine with real cards. Older fiber cards.
em0: <Intel(R) PRO/1000 Network Connection 6.9.14> mem 0xdb000000-0xdb01ffff
irq 28 at device 4.0 on pci19
em0: Reserved 0x20000 bytes for rid 0x10 type 3 at 0xdb000000
em0: Invalid MAC address
device_attach: em0 attach returned 5
em1: <Intel(R) PRO/1000 Network Connection 6.9.14> mem 0xdb020000-0xdb03ffff
irq 29 at device 9.0 on pci19
em1: Reserved 0x20000 bytes for rid 0x10 type 3 at 0xdb020000
em1: Invalid MAC address
device_attach: em1 attach returned 5
$ pciconf -v -l |grep -A4 -e "^em"
em0@pci0:19:4:0: class=0x020000 card=0x10008086 chip=0x10008086
rev=0x03 hdr=0x00
vendor = 'Intel Corporation'
device = '82542 Gigabit Ethernet Controller'
class = network
subclass = ethernet
em1@pci0:19:9:0: class=0x020000 card=0x10008086 chip=0x10008086
rev=0x03 hdr=0x00
vendor = 'Intel Corporation'
device = '82542 Gigabit Ethernet Controller'
class = network
subclass = ethernet
--
Mark Atkinson
atkin901@yahoo.com
(!wired)?(coffee++):(wired);
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