Date: Mon, 11 May 2009 15:29:10 -0400 From: Jung-uk Kim <jkim@FreeBSD.org> To: Alexander Motin <mav@FreeBSD.org> Cc: freebsd-current@FreeBSD.org, freebsd-firewire@FreeBSD.org Subject: Re: [Fwd: Re: amd64 suspend/resume broken on current] Message-ID: <200905111529.12808.jkim@FreeBSD.org> In-Reply-To: <4A058B5C.3010707@FreeBSD.org> References: <4A058B5C.3010707@FreeBSD.org>
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On Saturday 09 May 2009 09:55 am, Alexander Motin wrote:
> -------- Original Message --------
> Subject: Re: amd64 suspend/resume broken on current
> Date: Fri, 8 May 2009 21:52:45 +0200
> From: Guy Brand <gb@unistra.fr>
> Organization: Direction Informatique, Université de Strasbourg,
> France To: Alexander Motin <mav@mavhome.dp.ua>
> References: <gtslv6$ufq$1@FreeBSD.cs.nctu.edu.tw>
> <4A021118.2030106@mavhome.dp.ua> <20090508111024.GK4922@unistra.fr>
> <4A041DC2.90106@mavhome.dp.ua> <20090508144551.GA1599@unistra.fr>
> <4A047925.6060301@mavhome.dp.ua>
>
> Guy Brand wrote:
> > Alexander Motin wrote:
> > > Done. No firewire issue of course, but a kernel panic on
> > > resume. Bad karma since yesterday :-)
> >
> > Where is this panic happens now?
>
> Just after resuming:
>
> Fatal trap 12: page fault while in kernel mode
> ...
> current process = 1415 (acpiconf)
>
> The backtrace says:
>
> intr_execute_handlers() at intr_execute_handlers+0x21
> lapic_handle_intr() at lapic_handle_intr+0x37
> Xapic_isr1() at Xapic_isr1+0xa4
>
> acpi_sleep_machdep() at acpi_sleep_machdep+0x3b2
> acpi_EnterSleepState() at acpi_EnterSleepState+0x3fe
> acpi_AckSleepState() at acpi_AckSleepState+0x163
> devfs_ioctl() at devfs_ioctl_f+0x77
> kern_ioctl() at kern_ioctl+0xb0
> ioctl() at ioctl+0xfd
> syscall() at syscal+0x246
> Xfast_syscall() at Xfast_syscall+0xd0
So, that means the interrupt handler is executed *before* device is
completely resumed. In fact, the interrupts are not disabled for
dcons(4), it seems:
#if 0 /* Let dcons(4) be accessed */
/* Stop interrupt */
OWRITE(sc, FWOHCI_INTMASKCLR,
OHCI_INT_EN | OHCI_INT_ERR | OHCI_INT_PHY_SID
| OHCI_INT_PHY_INT
| OHCI_INT_DMA_ATRQ | OHCI_INT_DMA_ATRS
| OHCI_INT_DMA_PRRQ | OHCI_INT_DMA_PRRS
| OHCI_INT_DMA_ARRQ | OHCI_INT_DMA_ARRS
| OHCI_INT_PHY_BUS_R);
/* FLUSH FIFO and reset Transmitter/Reciever */
OWRITE(sc, OHCI_HCCCTL, OHCI_HCC_RESET);
#endif
I guess firewire(4) should differentiate suspend and shutdown
properly.
Jung-uk Kim
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