In case a user has a file descriptor that is used for non-blocking I/O
and the span to which it belongs gets unassigned, its reads and writes
will still yield -EAGAIN.
This commit adds a test for such a case and returns the proper -ENODEV.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The upstream 4.11 kernel, in commit (10383aea2f445bce9b2a2b308def08134b438c8e
"kref: Implement 'struct kref' using refcount_t"), changed refcount type on kref
objects. We now need to use refcount_read to read them.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Upstream kernel 4.11, in commit (bd0f9b356d00aa241ced36fb075a07041c28d3b8
"sched/headers: fix up header file dependency on <linux/sched/signal.h>"), now
requires users of signal_pending to include the new linux/sched/signal.h file.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
gcc-6.3.1 reports the following error when building the driver suite:
drivers/dahdi/voicebus/GpakApi.c: In function 'gpakReadDSPMemoryMap':
drivers/dahdi/voicebus/GpakApi.c:1560:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
if (DspStatus != 0)
^~
drivers/dahdi/voicebus/GpakApi.c:1563:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'if'
for (i = 0; i < MemoryLength_Word16; i++)
^~~
So we'll now update the indentation level (which appears to be a side effect of
mixed tabs and spaces in this file).
NOTE: The GpakAPI files are checkpatch.pl unclean because I did not want to
increase the burden of merging in updates from the original provider, but it may
be time to go ahead and bring the file in compliance with the kernel coding
standards.
Internal-Issue-ID: DAHLIN-354
Reported-by: Sean Darcy
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
The number of subunits per XPD (which is not trivial in BRI) has been
accidentally left out in a previous commit.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The packet data length field may have other values in some cases (BRI D
channel). It is also inherently limited to 3 bits.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The xpp drivers were originally developed seperately and thus had their
own version number. For quite some time they no longer have this version
number and report 'Revision: Unknown'.
Get rid of this mechanism.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The test originally did not check any input from the hardware.
Fix it to check the actual (and proper) input from the hardware.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Centos 5 has perl 5.8.8 . It does not support the '//' operator that was
added in perl 5.10. So sadly we have to avoid using it.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
* Don't enable debug by default.
* Demote some logging messages to debug.
* Remove a duplicate message about SLIC numbers.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Generation of metering tone (a feture normally disabled at build time)
is not yet implemented on the new FXS type 6 module.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The new FXS chip supports two ports for each chip and hence we once
again need to look at hardware differently.
Struct unit_description includes information about all chips/port in a
specific module.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Prepare for different types of commands: replace XFRAME_NEW_CMD with
XFRAME_NEW_REG_CMD in some places.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Currently we only have REG (register) commands. Refactor it to allow
MEM (memory) commands.
* A common header
* Don't assume a constant size.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
* wctdm: set to SPANTYPE_ANALOG_MIXED. Maybe it could be improved if all
slots have modules of the same type.
* wcfxo: type FXO.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
The xpp modules use time differences for various statistics. In one case
xpp_usb creates a histogram of the time it took the system to send USB
packets (URBs). The time difference is used (after adjustments) as an
index to that array.
However if the clock happens to go back at that exact point in time, we
get to write to an arbitrary negative index in this array.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
* Drop PCM during sluggish events:
- Drop both rx/tx (was only tx)
- Drop almost all pcm until sluggishness stops (used to drop only
single pcm each time).
- Renamed: "drop_next_pcm" -> "drop_pcm" (to match new semantics)
- Still allow "keep alive" PCM so Astribank will not reset FXS high-voltage.
The "sluggish_pcm_keepalive" parameter set the rate (1/50 by default)
- Added rx/tx drop statistics counters
- Removed "pcm_tx_drops" (replaced by new statistics counters)
* Also improved format of /proc/xpp/XBUS-*/xpp_usb:
- Show cummulative number of sluggish events.
- Clearly show range (in usec) of usb_tx_delay[]
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Now prints the serial number of the card to the kernel log for cards which
support this feature. This include the wcb23x and wcb43x series.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Adds support for Digium's new dual span wcb23x series cards. Also other minor
improvements for the new generation cards including the wcb23x and wcb43x
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
A few of the indirect register writes to the A_ST_* indirect registers weren't
being protected by any kind of sequence lock. This could lead to potential race
conditions of two spans were configured simultaneously.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The hw init function gets called on a module remove in order to reset the
hardware before shutdown. This was causing "Initializing zarlink echocan" to
print on shutdown which could be confusing.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This logic was reading and printing the bri chips automatic selection of sync
source. We always use manual sync selection in the driver so this doesn't need
to exist.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
When the firmware is reloaded and reset, the packet error count is not.
This can create a condition where the firmware could report an error like
the following if a channel was closed without any new errors:
wctc4xxp 0000:07:08.0: 18446744073709551597 errored receive packets
wcdte.packet_errors is also renamed to wcdte.reported_packet_errors to not
conflict with the packet_errors member of the descriptor lists.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
In the case where two transcoders are loaded in a system and one transcoder
experiences an errored receive packet condition, the logic would ping pong the
error between the two cards, causing a runaway stream of errors in the kernel
log.
This fix moves the global error count var into the wcdte struct to allow for
per-card logic.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>
The IRQF_DISABLED flag was removed in 4.1 in commit
"genirq: Remove the deprecated 'IRQF_DISABLED' request_irq() flag entirely" [1].
By default all interrupt handlers are now run with interrupts disabled and
therefore should all be considered "fast interrupts". Any driver that was still
using the flag will now lock interrupts directly in the handler in case running
on an older kernel that is not disabling interrupts when running the handler.
[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d8bf368d0631d4bc2612d8bf2e4e8e74e620d0cc
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
These flags are direct mappings to the IRQF_[SHARED|DISABLED] flags and no
longer need to be kept separate.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Introduces support for new series b43x cards which make use of the zarlink echo
canceller. Made as few changes to the b410 operation as possible, but the
critical region had some cleanups, so it may be a bit more performant.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The cards affected include the TE131/3, TE235/435, A4B, and A8B.
Update all PCIe cards' firmware to increase the incoming and outgoing TDM FIFOs
to 16ms. The FIFOs will only be filled to a depth equal to the driver's latency
setting (ie. 3ms default). The total system latency is not effected. The
firmware and driver now also report the maximum DMA transaction time when in
DEBUG mode to aid in determining if the system is experiencing long PCIe
transactions (ie. TLP completion timeouts).
Decreased the maximum latency to from 20 to 12ms
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
New USB firmware that fix mis-reporting of the number of channels (or
rather: licenses) in the Astribank when a 2FXS6FXO module is used in
conjunction with another module.
USB_FW.hex: rev. 11452
USB_FW.201.hex: rev. 11453
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Commit d5db139ab3764640e0882a1746e7b9fdee33fd87 "module: make
module_refcount() a signed integer." included in 3.19 makes this
condition slightly more complex.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
With commit (af3cd13501 "lib/string.c: remove strnicmp()") [1] dahdi can no
longer call strnicmp directly. strncasecmp was added into lib/string.c in kernel
version 2.6.22 so we'll map calls to strncasecmp to strnicmp for any kernel
before that.
This is necessary to compile against kernels >= 4.0.
[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3cd13501
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
It was reported that for VLAN interfaces, failing to release this reference
count will prevent a system from rebooting properly, resulting in the need to
power cycle.
Reported-by: Assen Totin
Internal-Issue-ID: DAHLIN-343
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Latest Astribank firmware (as of Rev. 11426 also supports some newer
hardware types, which will have the ID 203. Anyone installing this newer
version will now have 203 as an alias, but older versions will not have
it.
New firmware that includes a better way to identify hardware modules
type that does not require multiplexers.
This is firmware file FPGA_1161.201.hex rev. 11426.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Kernel version 3.16+, since upstream commit (7f7f25e82d54870d "replace checking
for ->read/->aio_read presence with check in ->f_mode" )[1], does not like it
when dahdi changes the set of allowed file operations on a file descriptor
outside of the context of an open() system call.
DAHDI changes the available file operations when a channel is opened by first
opening /dev/dahdi/channel and then calling the DAHDI_SPECIFY ioctl to bind it
to a particular DAHDI channel. Until DAHDI_SPECIFY is called there weren't any
read()/write() callbacks implemented and therefore after the initial open, the
kernel was setting not setting FMODE_CAN_{WRITE,READ} on the file descriptor
indicating that those operations were not allowed.
Now define empty shell functions on the general dahdi_fops so the vfs layer will
not mark a file descriptor as unwritteable or unreadable on open.
[1] https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=7f7f25e82d54870df24d415a7007fbd327da027b
Internal-Issue-ID: DAHLIN-340
Reported-and-tested-by: Thomas B. Clark
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The logic on ENABLE_TASKELETS compiler flag was inverted causing an oops on
normal dahdi_cfg of a dynamic span.
Issue-id: https://issues.asterisk.org/jira/browse/DAHLIN-328
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>
A fresh modprobe and dahdi_cfg would cause a temporary green alarm state on the
spans for a second while the alarm debounced into RED. New logic keeps the
spans alarm state as NONE during the unconfigured state, but sets the alarm
state to RED after the framer reset in the startup logic.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
A fresh modprobe and dahdi_cfg would cause a temporary green alarm state on the
driver for a second while the alarm debounced into RED. New logic keeps the
spans alarm state as NONE during the unconfigured state, but sets the alarm
state to RED after the framer reset in the startup logic.
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Acked-by: Shaun Ruffell <sruffell@digium.com>
The firmware/Makefile missed a line that added the firmware for the TE436 to the
download list.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Adds driver support for Digium's new te436 and te236 quad and dual span T1/E1 cards.
[removed whitespace at end of line]
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
If dahdi_span_ops.spanconfig is called multiple times in a row (like when
running dahdi_cfg; dahdi_cfg ) the tx signaling bits would go through a spurious
state that some far side devices would respond to.
Now, if the dahdi_span_ops.spanconfig callback is called, and the configuration
matches the existing configuration, we will not touch the framer.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
If dahdi_span_ops.spanconfig is called multiple times in a row (like when
running dahdi_cfg; dahdi_cfg ) the tx signaling bits would go through a spurious
state that some far side devices would respond to.
Now, if the dahdi_span_ops.spanconfig callback is called, and the configuration
matches the existing configuration, we will not touch the framer.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
If a channel is currently playing a tone when the tone zone is updated, the
existing tone zone could be freed while the channel keeps a reference to the
current tone (curtone) that points into the freed zone.
If the newly freed tone is then modified, there was a window where it was
possible to corrupt 'struct dahdi_chan' (by overrunning swritechunk[])
resulting in a "BUG: unable to handle kernel paging request at virtual address"
panic in the context of __dahdi_transmit_chunk().
Reported-and-Tested-by: Matt Behrens <matt@zigg.com>
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This fixes a long standing issue where, for CAS signaling, the RX bits were
sometimes misreported after span configuration before the first detected state
change.
The logic in the wct4xxp driver now matches that in the wcte43x driver and
wcte13xp drivers. The wcte12xp driver always polls the sigbits due to how
voicebus works and is not affected by this.
Internal-Issue-ID: DAHDI-1081
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
This is the same change for the wcte13xp driver but applied to the other
xbus-based digital card.
If dahdi_cfg set the DAHDI_CONFIG_NOTOPEN setting on the span, which it does
when the "yellow" flag is added to the span config line, then it was possible
for the span to get stuck with DAHDI_ALARM_NOTOPEN (NOP).
This is because the driver only updates the alarm state when the framer reports
that the span alarm has changed. Therefore, unless the framer goes through an
alarm transition, the fact that channels are opened was never noticed by alarm
handling routine.
Now check the alarm state directly when the first channel is opened, and the
last channel is closed.
Internal-Issue-ID: DAHDI-1103
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This will facilitate adding another flag for open channels on a span without
needing to add a lock on the span, or taking the global lock. Currently the span
flags are protected by the global reglock. This is not longer required.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
If dahdi_cfg set the DAHDI_CONFIG_NOTOPEN setting on the span, which it does
when the "yellow" flag is added to the span config line, then it was possible
for the span to get stuck with DAHDI_ALARM_NOTOPEN (NOP).
This is because the wcte13xp driver only updates the alarm state when the framer
reports that the span alarm has changed. Therefore, unless the framer goes
through an alarm transition, the fact that channels are opened was never noticed
by alarm handling routine.
Now check the alarm state directly when the first channel is opened, and the
last channel is closed.
Internal-Issue-ID: DAHDI-1103
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This makes the open symmetrical with the close. It is also considered good
practice to not call through callbacks with spinlocks held.
I modified all the drivers where I could not tell whether it was necessary to
hold the chan->lock with interrupts disabled to simply take the lock inside the
callback.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Fixes inability to reliably get CAS (robbed-bits) when using AMI line encoding
on the TE820 card.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
When originally implemented, the octasic calls where protected by the big kernel
lock. This change now allows the octasic library to control it's synchronization
as originally intended.
It would still be worthwhile to completely make the oct612x library
kernel-compliant.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
I am primarily making this change in order that the oct612x API can use a mutex as
a synchronization primitive. Mutexes can only be aquired in process context and
the wct4xxp driver calls the Oct61000InterruptServiceRoutine (which grabs a
serialization object) when tone detection is enabled.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This is never accessed or modified in interrupt context. This closes a potential
race if the echocan is being changed on a channel while enabling disabling is
hapening on another thread.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This closes a reference and memory leak when multiple CPUs are enabling echocan
on a single channel in parallel.
The essential problem is that the call to try_module_get() is not serialized.
Two separate threads can come into ioctl_echocan() on the same channel, they
coordinate via the dahdi_chan.lock to release any current echocan, but then both
create a new echocan state, bump the reference on the module, and the last one
through will actually attach the new state to the channel. The earlier reference
/ memory is leaked.
I tried to conceive of a way to fix this leak without adding a new lock, but the
choices where calling throught the function pointers with dahdi_chan.lock.
Otherwise I needed to change the semantics of echocan_create /free which would
ripple through the hardware echocan modules.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Since commit (e10f740 "wctc4xxp: Service tx ring in interrupt handler."), it
was possible to deadlock the system if the interrupt fires while the
watchdog function is running in the context of the system timer.
This was reported by lockdep.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Now use a continue after the check for cmd->timeout. This change is because I
need to make another change but the deep indentation level would make it hard to
stay within the 80 column limit.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
These were left over from recent developments and are not used by the driver.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This is a limitation of the DTE firmware that normally would result in dropped
packets on the firmware. If the driver knows it is going to be dropped it should
drop it.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The driver will now automatically reload the firmware when there are no open
channels if the firmware reports a fatal error. If the firmware reports an
error, but it was not fatal, it will leave things running and try to reload when
all channels are shut down. The driver will also halt channel processing and
reload the firmware if a channel ever failed to be created.
The thought is that if the DTE reports a non-fatal error, I cannot be certain
what the state is, and it should be reset when possible without impacting
otherwise functioning card. If there are problems, presumably all users would
hang up and the driver will then reload the firmware.
If the error is fatal, then all processing is halted to encourage everyone to
hang up. The card is probably not working at this point anyway, so there is no
point in trying to communicate with it.
Also included in this change is a compile-time selectable debug sysfs attribute
that will allow forcing an alert condition for testing the recovery.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The interrupt handler was not schedulding the deferred processing routine when
there was packets to process. I did not test the actual master branch after
editing for checkpatch compliance. Sorry.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
If the host system sends to many packets to the DTE to process, the on-card
memory can be exhausted which will result in an out of memory alert. In commit
2ac2338247, the driver will halt all communication
with the card and request a reload if any alert is received.
Now the driver will silently drop any "burst" traffic that was sent to the
transcoder as opposed to expecting the firmware to do it. There is currently a
limit of 640 samples (80ms of audio) in flight to the firmware at any one time
allowed.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This helps to keep the tx descriptor ring at max capacity when the system is
otherwise loaded. Now ready packets are moved from cmd_list to the transmit
descriptor ring directly in the interrupt handler and not when the deferred
function runs.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
I do not have any evidence that this made a difference, but hopefully it will
clear things up for people in the future who might be wondering why the
timestamp does not increase with the number of samples actually sent.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The polling interval was not fast enough to keep the tx ring full on a loaded
card. This fixes a regression introduced in commits
ba05e31c8a and
354d88cd41.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
When switching to polling mode it was possible that we would mask off the
receive complete interrupt until the next timer fired. Now go ahead and handle
anything we know how to handle regardless of the current mask.
Also, no need to update the reg local anymore since it isn't used to ack any
interrupts. We now always ack all the interrupts first and inspect them all.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
re-organize calls so worker_reset() isn't called twice
(was called from xbus_disconnect() and worker_destroy())
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
* Maintain a "shutting_down" flag per-xbus
* Use it to prevent xbus dereferencing (via xbus_get()/xbus_put())
during an xbus shutdown.
* Also, remove xbus from global array earlier.
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
