Skip to content

K
kernel_linux

OpenHarmony / kernel_linux
上一次同步 大约 4 年

通知 14
Star 8
Fork 2
K
kernel_linux
切换分支/标签
  1. 28 7月, 2013 1 次提交
  3. 01 5月, 2013 4 次提交
    • P
      firewire: ohci: dump_stack() for PHY regs read/write failures · 6fe9efb9
      由 Peter Hurley 提交于 
      A stack trace is an invaluable tool in determining the basis
and cause of PHY regs read/write failures.

Include PHY reg addr (and value for writes) in the diagnostic.

[Stefan R:  changed whitespace]
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      6fe9efb9
    • P
      firewire: ohci: Improve bus reset error messages · 67672134
      由 Peter Hurley 提交于 
      Many of the error messages possible from bus_reset_work() do not
contain enough information to distinguish which error condition
occurred nor enough information to evaluate the error afterwards.

Differentiate all error conditions in bus_reset_work(); add
additional information to make error diagnosis possible.

[Stefan R:  fixed self-ID endian conversion]
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      67672134
    • P
      firewire: ohci: Alias dev_* log functions · de97cb64
      由 Peter Hurley 提交于 
      Convert dev_xxxx(ohci->card.device, ...) log functions to
ohci_xxxx(ohci, ...).

[Stefan R:  Peter argues that this increases readability of the code.]
[Stefan R:  changed whitespace]
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      de97cb64
    • P
      firewire: ohci: Fix 'failed to read phy reg' on FW643 rev8 · bd972688
      由 Peter Hurley 提交于 
      With the LSI FW643 rev 8 [1], the first commanded bus reset at
the conclusion of ohci_enable() has been observed to fail with
the following messages:

[    4.884015] firewire_ohci 0000:01:00.0: failed to read phy reg
....
[    5.684012] firewire_ohci 0000:01:00.0: failed to read phy reg

With drivers/firewire/ohci.c instrumented, the error condition [2]
indicates the PHY arbitration state machine has timed out prior to
enabling PHY LCtrl.

Furthermore, instrumenting ohci_enable() shows that LPS has been
enabled within 1 ms.

Test LPS latching every 1 ms rather than every 50ms.

[1]  lspci -v

01:00.0 FireWire (IEEE 1394): LSI Corporation FW643 [TrueFire] PCIe 1394b Controller (rev 08) (prog-if 10 [OHCI])
	Subsystem: LSI Corporation FW643 [TrueFire] PCIe 1394b Controller
	Flags: bus master, fast devsel, latency 0, IRQ 92
	Memory at fbeff000 (64-bit, non-prefetchable) [size=4K]
	Capabilities: [44] Power Management version 3
	Capabilities: [4c] MSI: Enable+ Count=1/1 Maskable- 64bit+
	Capabilities: [60] Express Endpoint, MSI 00
	Capabilities: [100] Advanced Error Reporting
	Capabilities: [140] Virtual Channel
	Capabilities: [170] Device Serial Number 08-14-43-82-00-00-41-fc
	Kernel driver in use: firewire_ohci
	Kernel modules: firewire-ohci

[2] instrumented WARNING in read_phy_reg()

[    4.576010] ------------[ cut here ]------------
[    4.576035] WARNING: at ./drivers/firewire/ohci.c:570 read_phy_reg+0x93/0xe0 [firewire_ohci]()
[    4.576050] Hardware name: Precision WorkStation T5400
[    4.576058] failed to read phy reg:1 (phy(5) @ config enhance:19)
[    4.576068] Modules linked in: hid_logitech_dj hid_generic(+) usbhid <...snip...>
[    4.576140] Pid: 61, comm: kworker/2:1 Not tainted 3.8.0-2+fwtest-xeon #2+fwtest
[    4.576149] Call Trace:
[    4.576160]  [<ffffffff8105468f>] warn_slowpath_common+0x7f/0xc0
[    4.576168]  [<ffffffff81054786>] warn_slowpath_fmt+0x46/0x50
[    4.576178]  [<ffffffffa00caca3>] read_phy_reg+0x93/0xe0 [firewire_ohci]
[    4.576188]  [<ffffffffa00cae19>] ohci_read_phy_reg+0x39/0x60 [firewire_ohci]
[    4.576203]  [<ffffffffa00731ff>] fw_send_phy_config+0xbf/0xe0 [firewire_core]
[    4.576214]  [<ffffffffa006b2d6>] br_work+0x46/0xb0 [firewire_core]
[    4.576225]  [<ffffffff81071e0c>] process_one_work+0x13c/0x500
[    4.576238]  [<ffffffffa006b290>] ? fw_card_initialize+0x180/0x180 [firewire_core]
[    4.576248]  [<ffffffff810737ed>] worker_thread+0x16d/0x470
[    4.576257]  [<ffffffff81073680>] ? busy_worker_rebind_fn+0x100/0x100
[    4.576266]  [<ffffffff8107d160>] kthread+0xc0/0xd0
[    4.576275]  [<ffffffff816a0000>] ? pcpu_dump_alloc_info+0x1cb/0x2c4
[    4.576284]  [<ffffffff8107d0a0>] ? kthread_create_on_node+0x130/0x130
[    4.576297]  [<ffffffff816b2f6c>] ret_from_fork+0x7c/0xb0
[    4.576305]  [<ffffffff8107d0a0>] ? kthread_create_on_node+0x130/0x130
[    4.576313] ---[ end trace cbc940994b300302 ]---

[Stefan R:  Peter also reports a change of behavior with LSI FW323.
Before the patch, there would often occur a lock transaction failure
during firewire-core startup:
[    6.056022] firewire_core 0000:07:06.0: BM lock failed (timeout), making local node (ffc0) root
This failure no longer happens after the patch, without an obvious
reason for the failure or the fix.]

[Stefan R:  Added quirk flag, quirk table entry, and comment.]
Reported-by: NTim Jordan <tim@insipid.org.uk>
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      bd972688
  5. 29 4月, 2013 5 次提交
    • A
      firewire: ohci: fix VIA VT6306 video reception · be8dcab9
      由 Andy Leiserson 提交于 
      Add quirk for VT6306 wake bit behavior.

VT6306 seems to reread the wrong descriptor when the wake bit is
written. work around by putting a copy of the branch address in the
first descriptor of the block.

[Stefan R:  This fixes the known broken video reception via gstreamer
on VIA VT6306.  100% repeatable testcase:
$ gst-launch-0.10 dv1394src \! dvdemux \! dvdec \! xvimagesink
with a camcorder or other DV source connected.  Likewise for MPEG2-TS
reception via gstreamer, e.g. from TV settop boxes.
Perhaps this also fixes dv4l on VT6306, but this is as yet untested.
Kino, dvgrab or FFADO had not been affected by this chip quirk.
Additional comments from Andy:]

I've looked into some problems with the wake bit on a vt6306 family
chip (1106:3044, rev 46).

I used this firewire card in a mythtv setup (ISO receive MPEG2 stream)
with Debian 2.6.32 kernels for ~2 years without problems.

Since upgrading to 3.2, I've been having problems with the input stream
freezing -- input data stops until I restart mythtv (I expect closing
and reopening the device would be sufficient). This happens
infrequently, maybe one out of 20 recordings. I eventually determined
that the problem is more likely to occur if the system is loaded.

I isolated the kernel version as the triggering SW factor and then
specifically the change from dualbuffer back to packet-per-buffer DMA
mode.

The possibility that the controller does not properly respond to the
wake bit was suggested in
https://bugzilla.redhat.com/show_bug.cgi?id=415841, but not proven.

Based on the fact that dualbuffer mode worked while packet-per-buffer
has trouble, I guessed that upon seeing the wake bit written, the vt6306
controller only checks the branch address in the first descriptor of the
block, even if that is not the correct place to look (because the block
has multiple descriptors).

This theory seems to be correct. When the ISO reception is hung, I am
able to resume it by manually writing the branch address to the first
descriptor in the block, and then writing the wake bit.

I've had luck so far with the attached patch, so I'm including it. It's
probably not a complete solution -- I haven't tested transmit modes to
see whether they have a similar issue.

I doubt that the quirk test is any cheaper than just writing the extra
branch address in all cases, but it does reduce the risk of breaking
other hardware.

[Stefan R:  omitted QUIRK_NO_MSI from VT6306 quirks table entry,
changed whitespace]
Signed-off-by: NAndy Leiserson <andy@leiserson.org>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      be8dcab9
    • P
      firewire: ohci: Check LPS before register access on pci removal · 8db49149
      由 Peter Hurley 提交于 
      A pci device can be removed while in its suspended state. If the ohci
host controller is suspended, the PHY is also in low-power mode and
LPS is disabled. If LPS is disabled, most of the host registers aren't
accessible, including IntMaskClear. Furthermore, access to these registers
when LPS is disabled can cause hard lockups on some hardware. Since
interrupts are already disabled in this mode, further action is
unnecessary.

Test LPS before attempting to write IntMaskClear to disable interrupts.

[Stefan R: whitespace changes]
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      8db49149
    • P
      firewire: ohci: Fix double free_irq() · 247fd50b
      由 Peter Hurley 提交于 
      A pci device can be removed while in its suspended state.
Because the ohci driver freed the irq to suspend, free_irq() is
called twice; once from pci_remove() and again from pci_suspend(),
which issues the warning below [1].

Rather than allocate the irq in the .enable() path, move the
allocation to .probe(). Consequently, the irq is not reallocated
upon pci_resume() and thus is not freed upon pci_suspend().

[1] Warning reported by Mark Einon <mark.einon@gmail.com> when
suspending an MSI MS-1727 GT740 laptop on Ubuntu 3.5.0-22-generic

WARNING: at ./kernel/irq/manage.c:1198 __free_irq+0xa3/0x1e0()
Hardware name: MS-1727
Trying to free already-free IRQ 16
Modules linked in: ip6table_filter ip6_tables ebtable_nat ebtables <...snip...>
Pid: 4, comm: kworker/0:0 Tainted: P           O 3.5.0-22-generic #34-Ubuntu
Call Trace:
 [<ffffffff81051c1f>] warn_slowpath_common+0x7f/0xc0
 [<ffffffff81051d16>] warn_slowpath_fmt+0x46/0x50
 [<ffffffff8103fa39>] ? default_spin_lock_flags+0x9/0x10
 [<ffffffff810df6b3>] __free_irq+0xa3/0x1e0
 [<ffffffff810df844>] free_irq+0x54/0xc0
 [<ffffffffa005a27e>] pci_remove+0x6e/0x210 [firewire_ohci]
 [<ffffffff8135ae7f>] pci_device_remove+0x3f/0x110
 [<ffffffff8141fdbc>] __device_release_driver+0x7c/0xe0
 [<ffffffff8141fe4c>] device_release_driver+0x2c/0x40
 [<ffffffff8141f5f1>] bus_remove_device+0xe1/0x120
 [<ffffffff8141cd1a>] device_del+0x12a/0x1c0
 [<ffffffff8141cdc6>] device_unregister+0x16/0x30
 [<ffffffff81354784>] pci_stop_bus_device+0x94/0xa0
 [<ffffffffa0091c67>] acpiphp_disable_slot+0xb7/0x1a0 [acpiphp]
 [<ffffffffa0090716>] ? get_slot_status+0x46/0xc0 [acpiphp]
 [<ffffffffa0091d7d>] acpiphp_check_bridge.isra.15+0x2d/0xf0 [acpiphp]
 [<ffffffffa0092442>] _handle_hotplug_event_bridge+0x372/0x4d0 [acpiphp]
 [<ffffffff81390f8c>] ? acpi_os_execute_deferred+0x2f/0x34
 [<ffffffff8116e22d>] ? kfree+0xed/0x110
 [<ffffffff8107086a>] process_one_work+0x12a/0x420
 [<ffffffffa00920d0>] ? _handle_hotplug_event_func+0x1d0/0x1d0 [acpiphp]
 [<ffffffff8107141e>] worker_thread+0x12e/0x2f0
 [<ffffffff810712f0>] ? manage_workers.isra.26+0x200/0x200
 [<ffffffff81075f13>] kthread+0x93/0xa0
 [<ffffffff8168d024>] kernel_thread_helper+0x4/0x10
 [<ffffffff81075e80>] ? kthread_freezable_should_stop+0x70/0x70
 [<ffffffff8168d020>] ? gs_change+0x13/0x13
Reported-by: NMark Einon <mark.einon@gmail.com>
Signed-off-by: NPeter Hurley <peter@hurleysoftware.com>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      247fd50b
    • S
      firewire: remove unnecessary alloc/OOM messages · cfb0c9d1
      由 Stefan Richter 提交于 
      These are redundant to log messages from the mm core.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      cfb0c9d1
    • P
      firewire: Remove two unneeded checks for macros · df7ce663
      由 Paul Bolle 提交于 
      The old IEEE 1394 driver stack was removed in v2.6.37. That made the
checks for two Kconfig (module) macros unneeded, since they will now
always evaluate to true. Remove these two checks.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      df7ce663
  7. 09 1月, 2013 1 次提交
  9. 29 11月, 2012 1 次提交
  11. 19 11月, 2012 1 次提交
  13. 25 9月, 2012 1 次提交
  15. 18 6月, 2012 1 次提交
  17. 05 6月, 2012 1 次提交
  19. 27 5月, 2012 1 次提交
  21. 18 4月, 2012 2 次提交
  23. 09 4月, 2012 1 次提交
  25. 29 3月, 2012 1 次提交
  27. 19 3月, 2012 7 次提交
  29. 17 3月, 2012 1 次提交
    • C
      firewire: ohci: fix too-early completion of IR multichannel buffers · 0c0efbac
      由 Clemens Ladisch 提交于 
      handle_ir_buffer_fill() assumed that a completed descriptor would be
indicated by a non-zero transfer_status (as in most other descriptors).
However, this field is written by the controller as soon as (the end of)
the first packet has been written into the buffer.  As a consequence, if
we happen to run into such a descriptor when the interrupt handler is
executed after such a packet has completed, the descriptor would be
taken out of the list of active descriptors as soon as the buffer had
been partially filled, so the event for the buffer being completely
filled would never be sent.

To fix this, handle descriptors only when they have been completely
filled, i.e., when res_count == 0.  (This also matches the condition
that is reported by the controller with an interrupt.)
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Cc: 2.6.36+ <stable@vger.kernel.org>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      0c0efbac
  31. 11 3月, 2012 2 次提交
  33. 31 1月, 2012 1 次提交
  35. 27 1月, 2012 1 次提交
  37. 16 1月, 2012 1 次提交
  39. 18 10月, 2011 2 次提交
    • C
      firewire: ohci: fix isochronous DMA synchronization · a572e688
      由 Clemens Ladisch 提交于 
      Add the dma_sync_single_* calls necessary to ensure proper cache
synchronization for isochronous data buffers on non-coherent
architectures.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      a572e688
    • C
      firewire: ohci: work around selfID junk due to wrong gap count · 32eaeae1
      由 Clemens Ladisch 提交于 
      If a device's firmware initiates a bus reset by setting the IBR bit in
PHY register 1 without resetting the gap count field to 63 (and without
having sent a PHY configuration packet beforehand), the gap count of
this node will remain at the old value after the bus reset and thus be
inconsistent with the gap count on all other nodes.

The bus manager is supposed to detect the inconsistent gap count values
in the self ID packets and correct them by issuing another bus reset.

However, if the buggy device happens to be the cycle master, and if it
sends a cycle start packet immediately after the bus reset (which is
likely after a long bus reset), then the time between the end of the
selfID phase and the start of the cycle start packet will be based on
the too-small gap count value, so this gap will be too short to be
detected as a subaction gap by the other nodes.  This means that the
cycle start packet will be assumed to be self ID data, and will be
stored after the actual self ID quadlets in the self ID buffer.

This garbage in the self ID buffer made firewire-core ignore all of the
self ID data, and thus prevented the Linux bus manager from correcting
the problem.  Furthermore, because the bus reset handling was aborted
completely, asynchronous transfers would be no longer handled correctly,
and fw_run_transaction() would hang until the next bus reset.

To fix this, make the detection of inconsistent self IDs more
discriminating:  If the invalid data in the self ID buffer looks like
a cycle start packet, we can assume that the previous data in the buffer
is correctly received self ID information, and process it normally.

(We inspect only the first quadlet of the cycle start packet, because
this value is different enough from any valid self ID quadlet, and many
controllers do not store the cycle start packet in five quadlets because
they expect self ID data to have an even number of quadlets.)

This bug has been observed when a bus-powered DesktopKonnekt6 is
switched off with its power button.
Signed-off-by: NClemens Ladisch <clemens@ladisch.de>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      32eaeae1
  41. 09 10月, 2011 3 次提交
    • S
      firewire: net: Use posted writes · a74477db
      由 Stephan Gatzka 提交于 
      Change memory region to ohci "middle address space". This effectively
reduces the number of packets by 50%.

[Stefan R.:]  This eliminates 1394 ack packets and improved throughput
by a few percent in some tests with an S400a connection with and without
gap count optimization.  Since firewire-net taxes the AR-req DMA unit of
a FireWire controller much more than firewire-sbp2 (which uses the
middle address space with PCI posted writes too), this commit also
changes a related error printk into a ratelimited one as a precaution.

Side note:  The IPv4-over-1394 drivers of Mac OS X 10.4, Windows XP SP3,
and the Thesycon 1394 bus driver for Windows all use the middle address
space too.
Signed-off-by: NStephan Gatzka <stephan@gatzka.org>
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      a74477db
    • S
      firewire: ohci: optimize TSB41BA3D detection · b810e4ae
      由 Stefan Richter 提交于 
      Takes less source code and machine code, and less runtime with PHYs
other than TSB41BA3D (e.g. TSB81BA3 with device ID 0x831304 which takes
one instead of six read_paged_phy_reg now).
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      b810e4ae
    • S
      firewire: ohci: TSB41BA3D support tweaks · 28897fb7
      由 Stefan Richter 提交于 
      Fix:  phy_reg_mutex must be held over the write/read_phy_reg pair which
gets PHY port status.

Only print to the log when a TSB41BA3D was found.  By far most TSB82AA2
cards have a TSB81BA3, and firewire-ohci can keep quiet about that.

Shorten some strings and comments.  Change some whitespace.
Signed-off-by: NStefan Richter <stefanr@s5r6.in-berlin.de>
      28897fb7
  43. 17 9月, 2011 1 次提交