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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] Re: PCI passthrough stopped working, brainache!
On 13 October 2011 19:15, Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx> wrote:
> On Wed, Oct 12, 2011 at 10:36:12PM +0100, Andy Burns wrote:
>
>> I discovered that the PCI tuners don't work in dom0 under Xen,
>> they only work if the dom0 is booted as baremetal.
>
> That would imply it is not the PCI passthrough code (good!).
> It is something related to the driver
I've been having a go at getting the card running in dom0 rather than
domU, no more success yet.
I've stopped using the PCI resource realignment for now, and enabled
debugging knobs in the tuner modules, seems the I2C transfers used to
program the tuner and receive status bits back from it are working OK,
I can see the driver queueing up DMA using a succession of transfer
buffers, and apparently interrupts signalling their completion.
Presume it's correct that within the dom0, the buffers should *NOT* be
within the SWIOTLB range?
# dmesg | grep ffff8800
[ 0.000000] found SMP MP-table at [ffff8800000ff780] ff780
[ 0.000000] Base memory trampoline at [ffff880000097000] 97000 size 20480
[ 0.000000] PERCPU: Embedded 27 pages/cpu @ffff88001fe43000 s81024
r8192 d21376 u110592
[ 0.000000] Placing 64MB software IO TLB between ffff880015c00000 -
ffff880019c00000
... snip ...
[ 1539.146723] saa7130[0]/ts: buffer_activate [ffff88000c25ca00]
[ 1539.146726] saa7130[0]/ts: - [top] buf=ffff88000c25ca00
next=ffff88000959c800
[ 1539.146737] saa7130[0]/core: buffer_next #2
prev=ffff8800041f8440/next=ffff88000959c840
[ 1539.146790] saa7130[0]/core: buffer_queue ffff88000c25c000
[ 1539.154693] saa7130[0]/core: buffer_finish ffff88000c25ca00
[ 1539.154698] saa7130[0]/core: buffer_next ffff88000959c800
[prev=ffff88000c25c040/next=ffff88000959c840]
[ 1539.154702] saa7130[0]/ts: buffer_activate [ffff88000959c800]
[ 1539.154705] saa7130[0]/ts: - [bottom] buf=ffff88000959c800
next=ffff88000959c600
[ 1539.154716] saa7130[0]/core: buffer_next #2
prev=ffff88000c25c040/next=ffff88000959c640
[ 1540.156114] saa7130[0]/core: timeout on ffff88000959c800
[ 1540.156118] saa7130[0]/core: buffer_finish ffff88000959c800
I assume no meaningful transport stream contents are contained in the
buffers following the transfers, as no stations are found.
Hypervisor, dom0 (and domU when I was using it) are all 64bit, the
tuner device is 32bit, is this likely to be an issue with DMA
transfers? Any extra logging for Xen?
09:00.0 Multimedia controller: Philips Semiconductors SAA7130 Video
Broadcast Decoder (rev 01)
Subsystem: Compro Technology, Inc. Videomate DVB-T200
Flags: bus master, medium devsel, latency 64, IRQ 16
Memory at febffc00 (32-bit, non-prefetchable) [size=1K]
Capabilities: [40] Power Management version 1
Kernel driver in use: saa7134
Kernel modules: saa7134
09:01.0 Multimedia controller: Philips Semiconductors SAA7130 Video
Broadcast Decoder (rev 01)
Subsystem: Compro Technology, Inc. Videomate DVB-T200
Flags: bus master, medium devsel, latency 64, IRQ 17
Memory at febff800 (32-bit, non-prefetchable) [size=1K]
Capabilities: [40] Power Management version 1
Kernel driver in use: saa7134
Kernel modules: saa7134
> Perhaps it is the VM_IO bug that sometimes creeps up..
Any pointers to previous cases of that bug, or the methods to discover it?
> I saw something about I2C, is there a knob in the driver to _not_ use I2C?
Not for my tuner, I've added modprobe options to blacklist devices
that I don't need and turn on debugging for the tuner modules
# cat /etc/modprobe.d/dvb.conf
blacklist ds3000
blacklist dvb_usb_dw2102
blacklist firewire_ehci
blacklist firewire_ohci
options saa7134 disable_ir=1 video_debug=1 ts_debug=1 i2c_debug=1
i2c_scan=1 irq_debug=1 core_debug=1 gpio_tracking=1
options saa7134-dvb debug=1
options tda1004x debug=1
# lsmod
Module Size Used by
lockd 70080 0
bridge 72368 0
stp 1927 1 bridge
llc 4738 2 bridge,stp
ip6t_REJECT 3992 2
nf_conntrack_ipv6 7730 2
nf_defrag_ipv6 9083 1 nf_conntrack_ipv6
xt_state 1306 2
nf_conntrack 67597 2 nf_conntrack_ipv6,xt_state
ip6table_filter 1655 1
ip6_tables 16792 1 ip6table_filter
snd_hda_codec_realtek 312621 1
raid456 54497 1
async_raid6_recov 5358 1 raid456
async_pq 4339 2 raid456,async_raid6_recov
raid6_pq 78299 2 async_raid6_recov,async_pq
async_xor 3255 3 raid456,async_raid6_recov,async_pq
xor 4793 1 async_xor
async_memcpy 1845 2 raid456,async_raid6_recov
async_tx 2702 5
raid456,async_raid6_recov,async_pq,async_xor,async_memcpy
tda1004x 14722 2
snd_hda_intel 24072 0
snd_hda_codec 85181 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 6264 1 snd_hda_codec
saa7134_dvb 27032 0
videobuf_dvb 5146 1 saa7134_dvb
dvb_core 87211 1 videobuf_dvb
snd_seq 52186 0
snd_seq_device 5941 1 snd_seq
iTCO_wdt 12024 0
snd_pcm 78514 2 snd_hda_intel,snd_hda_codec
saa7134 159679 1 saa7134_dvb
rc_core 17136 1 saa7134
videobuf_dma_sg 8462 2 saa7134_dvb,saa7134
videobuf_core 15780 3 videobuf_dvb,saa7134,videobuf_dma_sg
v4l2_common 6905 1 saa7134
videodev 78689 2 saa7134,v4l2_common
media 11511 1 videodev
v4l2_compat_ioctl32 7665 1 videodev
shpchp 24554 0
i2c_i801 9237 0
serio_raw 4298 0
iTCO_vendor_support 2578 1 iTCO_wdt
sky2 42923 0
snd_timer 19372 2 snd_seq,snd_pcm
snd 63124 8
snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
soundcore 6267 1 snd
snd_page_alloc 7311 2 snd_hda_intel,snd_pcm
tveeprom 13045 1 saa7134
asus_atk0110 12395 0
x38_edac 3159 0
edac_core 40154 2 x38_edac
xen_netback 23987 0 [permanent]
xen_blkback 17924 0 [permanent]
xen_gntdev 9019 0
xen_evtchn 5032 1
sunrpc 200831 2 lockd
xenfs 9621 1
raid1 22676 2
ata_generic 3587 0
uas 7775 0
pata_acpi 3419 0
usb_storage 46027 0
sata_mv 24941 8
pata_marvell 3240 0
radeon 690803 1
ttm 54997 1 radeon
drm_kms_helper 26490 1 radeon
drm 194532 3 radeon,ttm,drm_kms_helper
i2c_algo_bit 4958 1 radeon
i2c_core 25728 11
tda1004x,saa7134_dvb,saa7134,v4l2_common,videodev,i2c_i801,tveeprom,radeon,drm_kms_helper,drm,i2c_algo_bit
[root@xen ~]# lsmod|more
Module Size Used by
lockd 70080 0
bridge 72368 0
stp 1927 1 bridge
llc 4738 2 bridge,stp
ip6t_REJECT 3992 2
nf_conntrack_ipv6 7730 2
nf_defrag_ipv6 9083 1 nf_conntrack_ipv6
xt_state 1306 2
nf_conntrack 67597 2 nf_conntrack_ipv6,xt_state
ip6table_filter 1655 1
ip6_tables 16792 1 ip6table_filter
snd_hda_codec_realtek 312621 1
raid456 54497 1
async_raid6_recov 5358 1 raid456
async_pq 4339 2 raid456,async_raid6_recov
raid6_pq 78299 2 async_raid6_recov,async_pq
async_xor 3255 3 raid456,async_raid6_recov,async_pq
xor 4793 1 async_xor
async_memcpy 1845 2 raid456,async_raid6_recov
async_tx 2702 5
raid456,async_raid6_recov,async_pq,async_xor,async_memcpy
tda1004x 14722 2
snd_hda_intel 24072 0
snd_hda_codec 85181 2 snd_hda_codec_realtek,snd_hda_intel
snd_hwdep 6264 1 snd_hda_codec
saa7134_dvb 27032 0
videobuf_dvb 5146 1 saa7134_dvb
dvb_core 87211 1 videobuf_dvb
snd_seq 52186 0
snd_seq_device 5941 1 snd_seq
iTCO_wdt 12024 0
snd_pcm 78514 2 snd_hda_intel,snd_hda_codec
saa7134 159679 1 saa7134_dvb
rc_core 17136 1 saa7134
videobuf_dma_sg 8462 2 saa7134_dvb,saa7134
videobuf_core 15780 3 videobuf_dvb,saa7134,videobuf_dma_sg
v4l2_common 6905 1 saa7134
videodev 78689 2 saa7134,v4l2_common
media 11511 1 videodev
v4l2_compat_ioctl32 7665 1 videodev
shpchp 24554 0
i2c_i801 9237 0
serio_raw 4298 0
iTCO_vendor_support 2578 1 iTCO_wdt
sky2 42923 0
snd_timer 19372 2 snd_seq,snd_pcm
snd 63124 8
snd_hda_codec_realtek,snd_hda_intel,snd_hda_codec,snd_hwdep,snd_seq,snd_seq_device,snd_pcm,snd_timer
soundcore 6267 1 snd
snd_page_alloc 7311 2 snd_hda_intel,snd_pcm
tveeprom 13045 1 saa7134
asus_atk0110 12395 0
x38_edac 3159 0
edac_core 40154 2 x38_edac
xen_netback 23987 0 [permanent]
xen_blkback 17924 0 [permanent]
xen_gntdev 9019 0
xen_evtchn 5032 1
sunrpc 200831 2 lockd
xenfs 9621 1
raid1 22676 2
ata_generic 3587 0
uas 7775 0
pata_acpi 3419 0
usb_storage 46027 0
sata_mv 24941 8
pata_marvell 3240 0
radeon 690803 1
ttm 54997 1 radeon
drm_kms_helper 26490 1 radeon
drm 194532 3 radeon,ttm,drm_kms_helper
i2c_algo_bit 4958 1 radeon
i2c_core 25728 11
tda1004x,saa7134_dvb,saa7134,v4l2_common,videodev,i2c_i801,tveeprom,radeon,drm_kms_helper,drm,i2c_algo_bit
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