Re: [RFC PATCH v0] Add tw5864 driver

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On Mon, Jan 11, 2016 at 12:52 PM, Hans Verkuil <hverkuil@xxxxxxxxx> wrote:
> Did you also test with v4l2-compliance? Before I accept the driver I want to see the
> output of 'v4l2-compliance' and 'v4l2-compliance -s'. Basically there shouldn't be
> any failures.
>
> I did a quick scan over the source and I saw nothing big. When you post the new
> version I will go over it more carefully and do a proper review.

Thank you for review.
You can find output of v4l2-compliance and v4l2-compliance -s tests
below (v4l-utils-1.8.0-42-gf1348b4).
There are some issues, I will work on them.
Could you please advise how could I optimize high-volume data passing
to userspace apps?
In one installation with 16 boards, when all streams are set to be 30
FPS all-I-frames (workaround for another P-frames quality issue), the
host struggles from regular lockups, see message immediately below
(4.2.0 kernel though, DKMS package with slightly modified code to
match older API).
I am not fully sure it is related to my driver, but I guess memcpy-ish
approach to preparing video frames may be very CPU-expensive. 30 FPS
all-I-frames video stream is like 3 megabytes per second.
Of course this is not very good situation anyway, and I should either
fix original issue or find some workarounds, at last to lower
framerate. But still, optimization of data passing using some
appropriate API like scatter-gather should be done I believe. I need
hints how to do that right.
Thanks in advance.

Jan 13 19:35:20 cctv kernel: [34202.715069] NMI watchdog: BUG: soft
lockup - CPU#2 stuck for 22s! [khugepaged:69]
Jan 13 19:35:20 cctv kernel: [34202.715071] Modules linked in: ib_iser
rdma_cm iw_cm ib_cm ib_sa ib_mad ib_core ib_addr iscsi_tcp
libiscsi_tcp libiscsi scsi_transport_iscsi ast ttm drm_kms_helper drm
syscopyarea sysfillrect sysimgblt xfs libcrc32c ipmi_ssif joydev
input_leds intel_rapl iosf_mbi x86_pkg_temp_thermal intel_powerclamp
coretemp kvm_intel kvm crct10dif_pclmul crc32_pclmul aesni_intel
aes_x86_64 lrw gf128mul glue_helper ablk_helper cryptd sb_edac
edac_core lpc_ich mei_me mei shpchp wmi tw5864(OE) solo6x10
videobuf2_dma_contig videobuf2_dma_sg videobuf2_memops videobuf2_core
v4l2_common videodev media ipmi_si 8250_fintek ipmi_msghandler snd_pcm
snd_seq_midi snd_seq_midi_event snd_rawmidi snd_seq snd_seq_device
snd_timer snd acpi_power_meter acpi_pad soundcore mac_hid parport_pc
ppdev lp parport hid_generic usbhid hid igb i2c_algo_bit ahci dca ptp
libahci megaraid_sas pps_core
Jan 13 19:35:20 cctv kernel: [34202.715105] CPU: 2 PID: 69 Comm:
khugepaged Tainted: G        W  OEL  4.2.0-23-generic
#28~14.04.1-Ubuntu
Jan 13 19:35:20 cctv kernel: [34202.715106] Hardware name: Supermicro
Super Server/X10SRi-F, BIOS 2.0 12/17/2015
Jan 13 19:35:20 cctv kernel: [34202.715107] task: ffff88046d7a6040 ti:
ffff88046d0f4000 task.ti: ffff88046d0f4000
Jan 13 19:35:20 cctv kernel: [34202.715108] RIP:
0010:[<ffffffff810f4c49>]  [<ffffffff810f4c49>]
smp_call_function_many+0x1f9/0x250
Jan 13 19:35:20 cctv kernel: [34202.715112] RSP: 0018:ffff88046d0f7b58
 EFLAGS: 00000202
Jan 13 19:35:20 cctv kernel: [34202.715112] RAX: 0000000000000003 RBX:
0000000000000000 RCX: ffff88047fd1a870
Jan 13 19:35:20 cctv kernel: [34202.715113] RDX: 0000000000000004 RSI:
0000000000000100 RDI: ffff88047fc97788
Jan 13 19:35:20 cctv kernel: [34202.715114] RBP: ffff88046d0f7b98 R08:
00000000000000fb R09: 0000000000000000
Jan 13 19:35:20 cctv kernel: [34202.715114] R10: 0000000000000004 R11:
0000000000000000 R12: 0000000000000297
Jan 13 19:35:20 cctv kernel: [34202.715115] R13: ffff88046d0f7b08 R14:
0000000000000202 R15: 0000000000000202
Jan 13 19:35:20 cctv kernel: [34202.715116] FS:
0000000000000000(0000) GS:ffff88047fc80000(0000)
knlGS:0000000000000000
Jan 13 19:35:20 cctv kernel: [34202.715117] CS:  0010 DS: 0000 ES:
0000 CR0: 0000000080050033
Jan 13 19:35:20 cctv kernel: [34202.715118] CR2: 00007fae31dc0000 CR3:
0000000001c0d000 CR4: 00000000001406e0
Jan 13 19:35:20 cctv kernel: [34202.715118] Stack:
Jan 13 19:35:20 cctv kernel: [34202.715119]  0000000000017740
01ff880400000001 0000000000000009 ffffffff81fb4ec0
Jan 13 19:35:20 cctv kernel: [34202.715120]  ffffffff8117d4c0
0000000000000000 0000000000000002 0000000000000100
Jan 13 19:35:20 cctv kernel: [34202.715122]  ffff88046d0f7bc8
ffffffff810f4e49 0000000000000100 0000000000000000
Jan 13 19:35:20 cctv kernel: [34202.715123] Call Trace:
Jan 13 19:35:20 cctv kernel: [34202.715127]  [<ffffffff8117d4c0>] ?
page_alloc_cpu_notify+0x50/0x50
Jan 13 19:35:20 cctv kernel: [34202.715128]  [<ffffffff810f4e49>]
on_each_cpu_mask+0x29/0x70
Jan 13 19:35:20 cctv kernel: [34202.715129]  [<ffffffff8117b513>]
drain_all_pages+0xd3/0xf0
Jan 13 19:35:20 cctv kernel: [34202.715131]  [<ffffffff8117f391>]
__alloc_pages_nodemask+0x631/0x990
Jan 13 19:35:20 cctv kernel: [34202.715134]  [<ffffffff811d5cb0>]
khugepaged_scan_mm_slot+0x540/0xf50
Jan 13 19:35:20 cctv kernel: [34202.715136]  [<ffffffff817b9b85>] ?
schedule_timeout+0x165/0x2a0
Jan 13 19:35:20 cctv kernel: [34202.715137]  [<ffffffff811d67dd>]
khugepaged+0x11d/0x440
Jan 13 19:35:20 cctv kernel: [34202.715139]  [<ffffffff810b73f0>] ?
prepare_to_wait_event+0xf0/0xf0
Jan 13 19:35:20 cctv kernel: [34202.715141]  [<ffffffff811d66c0>] ?
khugepaged_scan_mm_slot+0xf50/0xf50
Jan 13 19:35:20 cctv kernel: [34202.715143]  [<ffffffff810951b2>]
kthread+0xd2/0xf0
Jan 13 19:35:20 cctv kernel: [34202.715144]  [<ffffffff810950e0>] ?
kthread_create_on_node+0x1c0/0x1c0
Jan 13 19:35:20 cctv kernel: [34202.715146]  [<ffffffff817baedf>]
ret_from_fork+0x3f/0x70
Jan 13 19:35:20 cctv kernel: [34202.715147]  [<ffffffff810950e0>] ?
kthread_create_on_node+0x1c0/0x1c0
Jan 13 19:35:20 cctv kernel: [34202.715147] Code: 51 2c 00 3b 05 ad 82
c3 00 89 c2 0f 8d 98 fe ff ff 48 98 49 8b 4d 00 48 03 0c c5 40 ae d2
81 8b 41 18 a8 01 74 ca f3 90 8b 41 18 <a8> 01 75 f7 eb bf 0f b6 4d c8
4c 89 fa 4c 89 f6 44 89 ef e8 7f



 # /src/v4l-utils/utils/v4l2-compliance/v4l2-compliance -d /dev/video6
Driver Info:
        Driver name   : tw5864
        Card type     : TW5864 Encoder 2
        Bus info      : PCI:0000:06:05.0
        Driver version: 4.4.0
        Capabilities  : 0x85200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x05200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format

Compliance test for device /dev/video6 (not using libv4l2):

Required ioctls:
        test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
        test second video open: OK
        test VIDIOC_QUERYCAP: OK
        test VIDIOC_G/S_PRIORITY: OK

Debug ioctls:
        test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
        test VIDIOC_LOG_STATUS: OK

Input ioctls:
        test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
        test VIDIOC_ENUMAUDIO: OK (Not Supported)
        test VIDIOC_G/S/ENUMINPUT: OK
        test VIDIOC_G/S_AUDIO: OK (Not Supported)
        Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
        test VIDIOC_G/S_MODULATOR: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_ENUMAUDOUT: OK (Not Supported)
        test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
        test VIDIOC_G/S_AUDOUT: OK (Not Supported)
        Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
        test VIDIOC_ENUM/G/S/QUERY_STD: OK
        test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
        test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
        test VIDIOC_G/S_EDID: OK (Not Supported)

Test input 0:

        Control ioctls:
                test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
                test VIDIOC_QUERYCTRL: OK
                test VIDIOC_G/S_CTRL: OK
                test VIDIOC_G/S/TRY_EXT_CTRLS: OK
                test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
                test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
                Standard Controls: 11 Private Controls: 0

        Format ioctls:
                test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
                test VIDIOC_G/S_PARM: OK
                test VIDIOC_G_FBUF: OK (Not Supported)
                test VIDIOC_G_FMT: OK
                test VIDIOC_TRY_FMT: OK
                test VIDIOC_S_FMT: OK
                test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
                test Cropping: OK (Not Supported)
                test Composing: OK (Not Supported)
                test Scaling: OK (Not Supported)

        Codec ioctls:
                test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
                test VIDIOC_G_ENC_INDEX: OK (Not Supported)
                test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

        Buffer ioctls:
                fail: v4l2-test-buffers.cpp(386): node->s_std(std)
                fail: v4l2-test-buffers.cpp(500): testCanSetSameTimings(node)
                test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL
                test VIDIOC_EXPBUF: OK (Not Supported)

Test input 0:


Total: 42, Succeeded: 41, Failed: 1, Warnings: 0
[ERR]
01:58:05root@localhost /usr/local/src/linux
 # /src/v4l-utils/utils/v4l2-compliance/v4l2-compliance -s -d /dev/video6
Driver Info:
        Driver name   : tw5864
        Card type     : TW5864 Encoder 2
        Bus info      : PCI:0000:06:05.0
        Driver version: 4.4.0
        Capabilities  : 0x85200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x05200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format

Compliance test for device /dev/video6 (not using libv4l2):

Required ioctls:
        test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
        test second video open: OK
        test VIDIOC_QUERYCAP: OK
        test VIDIOC_G/S_PRIORITY: OK

Debug ioctls:
        test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
        test VIDIOC_LOG_STATUS: OK

Input ioctls:
        test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
        test VIDIOC_ENUMAUDIO: OK (Not Supported)
        test VIDIOC_G/S/ENUMINPUT: OK
        test VIDIOC_G/S_AUDIO: OK (Not Supported)
        Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
        test VIDIOC_G/S_MODULATOR: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_ENUMAUDOUT: OK (Not Supported)
        test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
        test VIDIOC_G/S_AUDOUT: OK (Not Supported)
        Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
        test VIDIOC_ENUM/G/S/QUERY_STD: OK
        test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
        test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
        test VIDIOC_G/S_EDID: OK (Not Supported)

Test input 0:

        Control ioctls:
                test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
                test VIDIOC_QUERYCTRL: OK
                test VIDIOC_G/S_CTRL: OK
                test VIDIOC_G/S/TRY_EXT_CTRLS: OK
                test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
                test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
                Standard Controls: 11 Private Controls: 0

        Format ioctls:
                test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
                test VIDIOC_G/S_PARM: OK
                test VIDIOC_G_FBUF: OK (Not Supported)
                test VIDIOC_G_FMT: OK
                test VIDIOC_TRY_FMT: OK
                test VIDIOC_S_FMT: OK
                test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
                test Cropping: OK (Not Supported)
                test Composing: OK (Not Supported)
                test Scaling: OK (Not Supported)

        Codec ioctls:
                test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
                test VIDIOC_G_ENC_INDEX: OK (Not Supported)
                test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

        Buffer ioctls:
                fail: v4l2-test-buffers.cpp(386): node->s_std(std)
                fail: v4l2-test-buffers.cpp(500): testCanSetSameTimings(node)
                test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL
                test VIDIOC_EXPBUF: OK (Not Supported)

Test input 0:

Streaming ioctls:
        test read/write: OK
                fail: v4l2-test-buffers.cpp(959): ret != EINVAL
        test MMAP: FAIL
                fail: v4l2-test-buffers.cpp(1043): buf.qbuf(node)
                fail: v4l2-test-buffers.cpp(1087): setupUserPtr(node, q)
        test USERPTR: FAIL
        test DMABUF: Cannot test, specify --expbuf-device


Total: 45, Succeeded: 42, Failed: 3, Warnings: 0
[ERR]
01:58:11root@localhost /usr/local/src/linux
 # /src/v4l-utils/utils/v4l2-compliance/v4l2-compliance -s
--expbuf-device=/dev/video6 -d /dev/video6
Driver Info:
        Driver name   : tw5864
        Card type     : TW5864 Encoder 2
        Bus info      : PCI:0000:06:05.0
        Driver version: 4.4.0
        Capabilities  : 0x85200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format
                Device Capabilities
        Device Caps   : 0x05200001
                Video Capture
                Read/Write
                Streaming
                Extended Pix Format

Compliance test for device /dev/video6 (not using libv4l2):

Required ioctls:
        test VIDIOC_QUERYCAP: OK

Allow for multiple opens:
        test second video open: OK
        test VIDIOC_QUERYCAP: OK
        test VIDIOC_G/S_PRIORITY: OK

Debug ioctls:
        test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
        test VIDIOC_LOG_STATUS: OK

Input ioctls:
        test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
        test VIDIOC_ENUMAUDIO: OK (Not Supported)
        test VIDIOC_G/S/ENUMINPUT: OK
        test VIDIOC_G/S_AUDIO: OK (Not Supported)
        Inputs: 1 Audio Inputs: 0 Tuners: 0

Output ioctls:
        test VIDIOC_G/S_MODULATOR: OK (Not Supported)
        test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
        test VIDIOC_ENUMAUDOUT: OK (Not Supported)
        test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
        test VIDIOC_G/S_AUDOUT: OK (Not Supported)
        Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
        test VIDIOC_ENUM/G/S/QUERY_STD: OK
        test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
        test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
        test VIDIOC_G/S_EDID: OK (Not Supported)

Test input 0:

        Control ioctls:
                test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
                test VIDIOC_QUERYCTRL: OK
                test VIDIOC_G/S_CTRL: OK
                test VIDIOC_G/S/TRY_EXT_CTRLS: OK
                test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
                test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
                Standard Controls: 11 Private Controls: 0

        Format ioctls:
                test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
                test VIDIOC_G/S_PARM: OK
                test VIDIOC_G_FBUF: OK (Not Supported)
                test VIDIOC_G_FMT: OK
                test VIDIOC_TRY_FMT: OK
                test VIDIOC_S_FMT: OK
                test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
                test Cropping: OK (Not Supported)
                test Composing: OK (Not Supported)
                test Scaling: OK (Not Supported)

        Codec ioctls:
                test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
                test VIDIOC_G_ENC_INDEX: OK (Not Supported)
                test VIDIOC_(TRY_)DECODER_CMD: OK (Not Supported)

        Buffer ioctls:
                fail: v4l2-test-buffers.cpp(386): node->s_std(std)
                fail: v4l2-test-buffers.cpp(500): testCanSetSameTimings(node)
                test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: FAIL
                test VIDIOC_EXPBUF: OK (Not Supported)

Test input 0:

Streaming ioctls:
        test read/write: OK
                fail: v4l2-test-buffers.cpp(959): ret != EINVAL
        test MMAP: FAIL
                fail: v4l2-test-buffers.cpp(1043): buf.qbuf(node)
                fail: v4l2-test-buffers.cpp(1087): setupUserPtr(node, q)
        test USERPTR: FAIL
                fail: v4l2-test-buffers.cpp(1111):
exp_q.reqbufs(expbuf_node, q.g_buffers())
                fail: v4l2-test-buffers.cpp(1200):
setupDmaBuf(expbuf_node, node, q, exp_q)
        test DMABUF: FAIL


Total: 46, Succeeded: 42, Failed: 4, Warnings: 0
[ERR]

-- 
Bluecherry developer.
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