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>
1) Enabling multiple csm_encaps channel commands in a single packet.
2) Sending commands to separate channels in parallel.
This reduces the time waiting for the responses to the commands and brings in
the channel setup from 50ms to under 10ms.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This patch does a couple of things. It adds a new DEBUG mode where packet
statistics are printed when channels are closed which can be used to track where
packets might be lost in the transcoding chain.
This patch will also print to the kernel log if the AN983 has detected any
errored received packets. Problems of this type are typically system problems,
like when the card is having trouble DMAing packets.
Internal-Issue-ID: DAHDI-1071
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Keeping the transmit descriptor ring shorter reduces the time it takes to send
CSM_ENCAP commands to the transcoding engine when the card is otherwise busy.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
It is only modified under the chanlock anyway.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Simplifies the logic when polling is enabled. No need to worry about any system
factors when scheduling the default kernel timer.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Otherwise, if there are many RTP commands queued on the command list, some of
the CSM_ENCAP packets, like ACKS, weren't being sent to the firmware within the
timeout value.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Not only does this make it atomic when moving commands from the
waiting_for_response_list to the command_list if the descriptor is full, it will
also make the entire process of submitting a packet the packet transmission
logic atomic.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
This was more a holdover when the AN983 interface was brought over from the
voicebus driver.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
When we start the shutdown sequence for a channel, there is no need to submit
any RTP packets that are queued on the command list. Under extreme load with
many backed up RTP packets it was possible to have RTP packets submitted after
the channel shutdown process started.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
A small percentage of the total packets sent to the DTE ever wait for
completions. This will save on the need to keep the completion around in all the
packets.
Also, since we can use the presence of the completion as the flag whether we
intend to auto free, we can simplify the flags as well.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
While not required by the protocol to the DTE, this does help when debugging the
trace files.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Furthermore, do it as soon as we know we should to prevent the ack from
potentially going out after another CSM_ENCAPS packet on another CPU.
Previously, we would not send ACKS to responses we believed we already responded
to.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Eliminates some cases where there are duplicated packets in the capture if the
hardware descriptor ring was already full.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Makes the channels themselves behave like the supervisor channel. This only
protects the driver in the case the commands were severly backed up, like when
there was high packet loss.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
They are sufficiently protected by the list locks. This also cleans up a case
where the tcp was unlocked after already completing it, which was corrupting the
list.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
In case we missed an alert, this will allow for rapid shutdown of Asterisk.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Even if it is duplicated or we don't have an outbound message waiting, we should
ack it so that the firmware does not keep trying to send it to the host.
Otherwise the firmware could get into situations where it was constantly
retrying to send packets for which it did not receive our previous ACK and
exhaust memory.
I was only seeing this on platforms were packets were going missing in the
stream, increasing the probability that the driver would miss early responses.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The kernel log will now contain reports if there are bus errors.
This is a troubleshooting aide on systems with bus issues.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
Clarifies that the semaphore was being used as a mutex. Mutexes are also more
efficient and allow better debugging checks.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The ioctls for the debug network interface on the tc400b0 has not been used for
a long time. It is now gone.
This will also allow the sempahore set in the ioctl to be changed into a mutex
which provides enhanced debugging checks.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
When an unsolicited alert is received, we'll flag the card as halted so that
commands will not be retried. This is because often times the firmware will no
longer process any commands in this state and the driver will hold processes in
the dstate while waiting to retry the commands.
This is a debugging aide in that it simplies unloading the driver if the card /
driver is currently in a failed state.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The read-line-multiple command was already disabled on the voicebus cards, which
use the same interface, in commit 4de462c3e0. This
does the same thing for the transcoder card and also disables the read line
command.
I've seen this change directly correlated to problems with the AN983 receiving
packets from the onboard DSP on some platforms.
Internal-Issue-ID: DAHDI-1071
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
I've not seen this directly tied to any issue, but it's enabled on the voicebus
cards and so brings the wctc4xxp driver in line.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Signed-off-by: Russ Meyerriecks <rmeyerriecks@digium.com>
The timer_list member of the transcoder buffer has not been used for a long
time. Saves some space in the buffer in addition to removing any future
curiosity about what it is for.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
If system conditions prevent the card from loading the firmware without
touching all the descriptors in the ring, it's possible for
wctc4xxp_cleanup_descriptor_ring to attempt cleanup of a command that was never
submitted resulting in the following BUG.
wctc4xxp 0000:02:0a.0: Failed to load firmware.
BUG: unable to handle kernel paging request at c109556c
IP: [<f9faa83e>] wctc4xxp_cleanup_descriptor_ring+0x8c/0x148 [wctc4xxp]
Reported-by: Xavier Carcelle <xcarcelle@avencall.com>
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Newer versions of kernel build system do not require these Makefiles and
support for kernels older than 2.6.9 are no longer supported by DAHDI.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10617 a0bf4364-ded3-4de4-8d8a-66a801d63aff
In addition to updating the year, this also adds some boilerplate to
dahdi-sysfs.c and dahdi-sysfs-chan.c that wasn't there previously.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10560 a0bf4364-ded3-4de4-8d8a-66a801d63aff
This patch removes support for kernel versions < 2.6.18, as those are
not actively supported in any major Linux distribution (except RHEL4,
which is in the "extended" support level of the product life cycle).
This removes much of the more #ifdef-rich parts of the code.
Signed-off-by: Oron Peled <oron.peled@xorcom.com>
Acked-by: Acked-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10472 a0bf4364-ded3-4de4-8d8a-66a801d63aff
The ndo_set_multicast_list callback was removed in b81693d9, which was
first released in Linux Kernel 3.2-rc1
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10360 a0bf4364-ded3-4de4-8d8a-66a801d63aff
I only generally test on RHEL 4 when testing against kernels older
than 2.6.18. Apparently OpenSUSE 10.1 runs with 2.6.16 and doesn't
have WARN_ON_ONCE backported. I took the patch Richard Miller
originally attached to the issue and moved it to
include/dahdi/kernel.h so it would be available for all the board
drivers in the future.
Internal-Issue-ID: DAHLIN-260
Reported-by: Richard Miller
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10252 a0bf4364-ded3-4de4-8d8a-66a801d63aff
The driver has, until now, dropped G723 SID frames even though the
firmware on the TC400/TCE400 can handle them. Now let them on
through.
Reported-and-Tested-by: Angel Carhuas <acarhuas@colinanet.com>
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10218 a0bf4364-ded3-4de4-8d8a-66a801d63aff
r10082 "wctc4xxp: Cleanup in-flight commands when halting due to
hardware error." introduced a lock imblance on the error path where the
cmd_list_lock would be unlocked twice when the board is halted due to a
hardware error. Thanks sparse.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10138 a0bf4364-ded3-4de4-8d8a-66a801d63aff
DAHDI currently supports kernels >= 2.6.9. netdev_priv() has been in the
mainline kernel since versions 2.6.6 so it's available in all the
supported kernels. This change is needed to compile against the 3.1 kernel.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10096 a0bf4364-ded3-4de4-8d8a-66a801d63aff
On one system I was seeing the board reset in the middle of a
transaction. Any commands that were on the response list when this would
happen would never be completed and the process would then be stuck in
an uninterruptible sleep. This change also prevents the driver from
sleeping in timer context, which would result in a kernel panic.
This change at least lets an error message propogate back to the user.
DAHDI-880
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@10082 a0bf4364-ded3-4de4-8d8a-66a801d63aff
gcc-4.6 now warns about variables that are set but never used. Clean up
unused variables everywhere except the oct612x subdirectory.
The oct612x should go in a separate patch in case that needs to be
pulled out into a separate project again.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9929 a0bf4364-ded3-4de4-8d8a-66a801d63aff
These drivers (all DAHDI drivers) should explicitly block suspend if they are
loaded.
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Michael Spiceland <mspiceland@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9882 a0bf4364-ded3-4de4-8d8a-66a801d63aff
2.6.25 added the DEFINE_PCI_DEVICE_TABLE macro to make sure that the
pci_device_id tables are put into the correct section in the binary.
Convert all the places where the tables were defined to use them.
This is linux-2.6 commit where the change went in along with the
rationale: 90a1ba0c5e39eeea278f263c28ae02166c5911c8
Signed-off-by: Shaun Ruffell <sruffell@digium.com>
Acked-by: Kinsey Moore <kmoore@digium.com>
git-svn-id: http://svn.asterisk.org/svn/dahdi/linux/trunk@9584 a0bf4364-ded3-4de4-8d8a-66a801d63aff
