channel_joblist_peek() returns NULL if the list is empty.
nvgpu_channel_joblist_is_empty() has been used only together with that
function; remove it and check against NULL to see whether there are jobs
in flight.
This removes some duplication, simplifies the call sites slightly, and
gets rid of a Coverity nag about a possible NULL pointer from peek that
really isn't (when the emptiness was already checked).
Jira NVGPU-5772
Change-Id: I814e9c510d99b88e59539359992fb44d4e7ce2ea
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2397394
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Split up nvgpu_channel_clean_up_jobs() on the clean_all parameter so
that there's one version for the asynchronous ("deferred") cleanup and
another for the synchronous deterministic cleanup that occurs in the
submit path.
Forking another version like this adds some repetition, but this lets us
look at both versions clearly in order to come up with a coherent plan.
For example, it might be feasible to have the light cleanup of pooled
items in also the nondeterministic path, and deferring heavy cleanup to
another, entirely separated job queue.
Jira NVGPU-5493
Change-Id: I5423fd474e5b8f7b273383f12302126f47076bd3
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2346065
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As the submit job metadata has been simplified, the fence pool for job
tracking fences is now just complex code for very simple purposes, so
delete it. It's enough to hold the fence memory in the job struct itself
instead of having separately allocated objects with different lifetimes.
Each channel is using preallocated job arrays based on the prespecified
inflight job count. The fences are used for tracking job completion, and
a new job cannot be submitted before a previous wait has completed.
This means that even with a ringbuffer with space for only one job, the
previous job memory cannot get reclaimed by a new submit because the
submits are ordered.
Jira NVGPU-5773
Change-Id: I0c777df700aa7cfda6f971efa47aa72c5462b53a
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2392704
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During recovery, we set ch->unserviceable at the end after we preempt
the TSG and reset the engines. It might be too late and user-space
might submit more work to the broken channel which is not desirable.
Move setting this unserviceable flag right at the start
of recovery sequence.
Another thread doing a submit can still read the unserviceable flag
just before it is set here, leaving that submit stuck if recovery
completes before the submit thread advances enough to set up a post
fence visible for other threads. This could be fixed with a big lock
or with a double check at the end of the submit code after the job
data has been made visible.
We still release the fences, semaphore and error notifier wait queues
at the end; so user-space would not trigger channel unbind while
channel is being recovered.
Also, change the handle_mmu_fault APIs to return void as the
debug_dump return value is not used in any of the caller APIs.
JIRA NVGPU-5843
Change-Id: Ib42c2816dd1dca542e4f630805411cab75fad90e
Signed-off-by: Tejal Kudav <tkudav@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2385256
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Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
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Currently the vGPU engine management rewrites a lot of the common
device agnostic engine management code.
With the new top HAL parsing one device at a time, it is now more
easily possible to tie the vGPU into the new common device framework
by implementing the top HAL but with the vGPU engine list backend.
This lets the vGPU inherit all the common engine and device
management code. By doing so the vGPU HAL need only implement a
trivial and simple HAL.
This also gets us a step closer to merging all of the CE init
code: logically it just iterates through all CE engines whatever
they may be. The only reason this differs between chips is because
of the swap from CE0-2 to LCEs in the Pascal generation. This could
be abstracted by the unit code easily enough.
Also, the pbdma_id for each engine has to be added to the device
struct. Eventually this was going to happen anyway, since the
device struct will soon replace the nvgpu_engine_info struct.
It's a little bit of an abuse but might be worth it long term. If
not, it should not be difficult to replace uses of dev->pbdma_id
with a proper lookup of PBDMA ID based on the device info.
JIRA NVGPU-5421
Change-Id: Ie8dcd3b0150184d58ca0f78940c2e7ca72994e64
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2351877
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Unify the job metadata handling by deleting the parts that have handled
dynamically allocated job structs and fences. Now a channel can be in
one less mode than before which reduces branching in tricky places and
makes the submit/cleanup sequence easier to understand.
While preallocating all the resources upfront may increase average
memory consumption by some kilobytes, users of channels have to supply
the worst case numbers anyway and this preallocation has been already
done on deterministic channels.
Flip the channel_joblist_delete() call in nvgpu_channel_clean_up_jobs()
to be done after nvgpu_channel_free_job(). Deleting from the list (which
is a ringbuffer) makes it possible to reuse the job again, so the job
must be freed before that. The comment about using post_fence is no
longer valid; nvgpu_channel_abort() does not use fences.
This inverse order has not posed problems before because it's been buggy
only for deterministic channels, and such channels do not do the cleanup
asynchronously so no races are possible. With preallocated job list for
all channels, this would have become a problem.
Jira NVGPU-5492
Change-Id: I085066b0c9c2475e38be885a275d7be629725d64
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2346064
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Reviewed-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-by: Deepak Nibade <dnibade@nvidia.com>
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Implement empty stubs of the channel watchdog functions for when
watchdog is disabled from build. Add some forward declarations that were
missing. Now most call sites don't need #idefs for the build flag.
Add error checks for the wdt alloc failure.
Jira NVGPU-5494
Jira NVGPU-5493
Change-Id: I2d42e8ab4c5e045cd280b2e1f254396127bd154b
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2352050
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Make Recovery and quiesce co-exist to support quiesce state
on unrecoverrable errors. Currently, the quiesce code is wrapped
under ifndef CONFIG_NVGPU_RECOVERY. Isolate the quiesce code from
recovery config, thereby enabling it on all builds.
On Linux, the hung_task checker(check_hung_uninterruptible_tasks()
in kernel/hung_task.c) complains that quiesce thread is stuck for
more than 120 seconds.
INFO: task sw-quiesce:1068 blocked for more than 120 seconds.
The wait time of more than 120 seconds is expected as quiesce
thread will wait until quiesce call is triggered on fatal
unrecoverable errors. However, the INFO print upsets the
kernel_warning_test(KWT) on Linux builds. To fix the failing
KWT, change the quiesce task to interruptible instead of
uninterruptible as checker only looks at uninterruptible tasks.
Bug 2919899
JIRA NVGPU-5479
Change-Id: Ibd1023506859d8371998b785e881ace52cb5f030
Signed-off-by: tkudav <tkudav@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2342774
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The gk20a_debug_dump() function implicitly adds a newline since it
uses nvgpu_err() under the hood (for uart destined prints). For the
seq_file destined writes it does not so there is an annoying inconsistency.
Remove the newline that many of the gk20a_debug_dump() calls add and add
the newline to the (now) seq_printf() call. This reduces the length of
debug dump logs and speeds them up - UART is _very_ slow after all.
Also cleanup some formatting issues in the various debug prints I
happened to notice.
JIRA NVGPU-5541
Change-Id: Iabf853d5c50214794fc4cbb602dfffabeb877132
Signed-off-by: Alex Waterman <alexw@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2347956
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Reviewed-by: Konsta Holtta <kholtta@nvidia.com>
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Move the per-channel hw semaphore object to be owned by the channel sync
(just like with syncpoints, too). Store just the channel ID in the hw
sema for debug prints to get rid of sema->channel dependencies. Make
nvgpu_semaphore_alloc() take a hw sema instead of a channel.
Fix up some channel-related documentation that has been incorrect.
Jira NVGPU-5353
Change-Id: I04d49da3aac50a4cea32e7393f48e6f85a80ca0d
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2339931
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Move preallocation of priv cmdbuf metadata structs to the priv cmdbuf
level and do it always, not only on deterministic channels. This makes
job tracking simpler and loosens dependencies from jobs to cmdbuf
internals. The underlying dma memory for the cmdbuf data has always been
preallocated.
Rename the priv cmdbuf functions to have a consistent prefix.
Refactor the channel sync wait and incr ops to free any priv cmdbufs
they allocate. They have been depending on the caller to free their
resources even on error conditions, requiring the caller to know how
they work.
The error paths that could occur after a priv cmdbuf has been allocated
have likely been wrong for a long time. Usually the cmdbuf queue allows
allocating only from one end and freeing from only the other end, as
that's natural with the hardware job queue. However, in error conditions
the just recently allocated entries need to be put back. Improve the
interface for this.
[not part of the cherry-pick:] Delete the error prints about not enough
priv cmd buffer space. That is not an error. When obeying the
user-provided job sizes more strictly, momentarily running out of job
tracking resources is possible when the job cleanup thread does not
catch up quickly enough. In such a case the number of inflight jobs on
the hardware could be less than the maximum, but the inflight job count
that nvgpu sees via the consumed resources could reach the maximum.
Also remove the wrong translation to -EINVAL from err from one call to
nvgpu_priv_cmdbuf_alloc() - the -EAGAIN from the failed allocation is
important.
[not part of the cherry-pick: a bunch of MISRA mitigations.]
Jira NVGPU-4548
Change-Id: I09d02bd44d50a5451500d09605f906d74009a8a4
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2329657
(cherry picked from commit 25412412f31436688c6b45684886f7552075da83)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2332506
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Move struct priv_cmd_queue to priv_cmdbuf.c so that its definition does
not need to be visible to all users of channel.h. This also forces it to
be separately allocated (during channel init time).
While at it, rename the functions to allocate and free priv cmdbuf
queues now that they're not in channel.c anymore. A private command
buffer queue is a piece of dma memory from which entries for incr and
wait command lists are suballocated. As the name implies, it's a queue;
allocations and frees of the bufs must happen in certain order.
Jira NVGPU-4548
Change-Id: I1b47029f3a478e1942f24292918b7b59a5d91528
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2323147
(cherry picked from commit 1fcf9b04275f44638059c0147dc16c1dc6956510)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2328407
Reviewed-by: automaticguardword <automaticguardword@nvidia.com>
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Reviewed-by: Alex Waterman <alexw@nvidia.com>
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GVS: Gerrit_Virtual_Submit
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Refactor user managed syncpoints out of the channel sync infrastructure
that deals with jobs submitted via the kernel api. The user syncpt only
needs to expose the id and gpu address of the reserved syncpoint. None
of the rest (fences, priv cmdbufs) is needed for that, so it hasn't been
ideal to couple with the user-allocated syncpts.
With user syncpts now provided by channel_user_syncpt, remove the
user_managed flag from the kernel sync api.
This allows moving all the kernel submit sync code to be conditionally
compiled in only when needed, and separates the user sync functionality
in a more clear way from the rest with a minimal API.
[this is squashed with commit 5111caea601a (gpu: nvgpu: guard user
syncpt with nvhost config) from
https://git-master.nvidia.com/r/c/linux-nvgpu/+/2325009]
Jira NVGPU-4548
Change-Id: I99259fc9cbd30bbd478ed86acffcce12768502d3
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2321768
(cherry picked from commit 1095ad353f5f1cf7ca180d0701bc02a607404f5e)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2319629
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Each submitted job has held a reference to the channel where the job
runs. This is not necessary: all that the refs do is prevent the channel
from getting freed before the jobs are done in case the channel file is
closed early. However, that is already taken care of, so remove the
per-job get/put pair.
The channel closure path needs to unbind the channel from its tsg if
that hasn't done by the channel's user. Unbind gets the channel off the
runlist and forces all fences to expire, then enqueues the channel for
final job cleanup. No jobs can outlive this.
Delete also the extra get/put pair in job cleanup. The caller (either
the channel worker thread or the submit path in case of deterministic
channels) will always hold a reference.
Jira NVGPU-4548
Change-Id: I3a01759e1b2caf66c46cff19f6557645489ca8f4
Signed-off-by: Konsta Hölttä <kholtta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2322541
(cherry picked from commit 8af6260b8fcfd7bf393f50addb681b5353cbae38)
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2324255
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Channel debug_dump hal function does not involve
any register related code.
Move gv11b_channel_debug_dump hal function to
common code nvgpu_channel_info_debug_dump function.
Check gpu hw version to limit instance variables
dump that differs between socs.
Add new hal pointer syncpt_debug_dump for pbdma.
Jira NVGPU-5109
Signed-off-by: Vinod G <vinodg@nvidia.com>
Change-Id: Icfca837ce8e4117387cffa6fadf6c094c7da5946
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2321016
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Enable build flags for dGPU in safety, when
NVGPU_FORCE_DGPU_SAFETY_PROFILE is set.
Use libnvgpu-dgpu_safe.exports for dGPU safety build.
Add build flags for tu104 HAL initialization (to solve
undefined symbols in safety build).
Temporarily add non-fusa files needed to build dGPU in safety.
related functions will have to move to fusa files.
Jira NVGPU-4611
Change-Id: I41db0c039c7f15d9191cdb811b4906e779d5cc88
Signed-off-by: Thomas Fleury <tfleury@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2310276
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- "include/trace/events/gk20a.h" file was having GPL2 license
(which should not used for QNX code). This file was used for
compiling linux userspace driver("libnvgpu-drv.so") and was used for
unit testing on QNX.
- This patch removes stubs in "include/trace/events/gk20a.h" file.
(which were used for linux userspace driver.)
- For QNX driver, "nvgpu_rmos/trace/events/gk20a.h" was used.
This patch moves that file to "include/nvgpu/posix/trace_gk20a.h" and
does relevant license change. This same file will be used for linux
userspace driver.
- This patch also creates a new file "include/nvgpu/trace.h" which
selects proper trace file depending on the config.
Bug 2802414
Change-Id: Icdfb251e5698073f986753a969e804161af3ecc5
Signed-off-by: Vaibhav Kachore <vkachore@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2286388
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This patch adds boundary value check for common.fifo parameters as
listed below.
1. nvgpu_channel_setup_bind() includes a condition to check that value
of num_gpfifo_entries does not exceed 2^31. Otherwise prints message and
returns error.
2. nvgpu_tsg_bind_channel() includes a condition to check if channel
subctx had ASYNC id. If true, runqueue selector is set to 1 and 0
otherwise. This check is to be moved from devctl to common.fifo.
Jira NVGPU-4817
Change-Id: Id1c9253945859c245e584b5c42b3285a6b620055
Signed-off-by: Vedashree Vidwans <vvidwans@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nvgpu/+/2278613
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IRQs can get triggered during nvgpu power-on due to MMU fault, invalid
PRIV ring or bus access etc. Handlers for those IRQs can't access the
full state related to the IRQ unless nvgpu is fully powered on.
In order to let the IRQ handlers know about the nvgpu power-on state
gk20a.power_on_state variable has to be protected through spinlock
to avoid the deadlock due to usage of earlier power_lock mutex.
Further the IRQs need to be disabled on local CPU while updating the
power state variable hence use spin_lock_irqsave and spin_unlock_-
irqrestore APIs for protecting the access.
JIRA NVGPU-1592
Change-Id: If5d1b5e2617ad90a68faa56ff47f62bb3f0b232b
Signed-off-by: Sagar Kamble <skamble@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2203860
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This change eliminates MISRA Advisory Rule 18.4
violations in the following by accessing g->fifo.channel
with array indexing:
* nvgpu_channel_init_support()
* nvgpu_channel_semaphore_wakeup()
Advisory Rule 18.4 states that the +, -, +=, and -=
operators should not be applied to an expression
of pointer type.
JIRA NVGPU-3798
Change-Id: I6b1bf360db6ec25894cc0ea430c33067e0cddf64
Signed-off-by: Scott Long <scottl@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2207550
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Add macros for whitelisting coverity violations. These macros use pragma
directives. The pragma directives and whitelisting macros are only
enabled when a coverity scan is being run.
The whitelisting macros have been added to a new header called
static_analysis.h. The contents of safe_ops.h (CERT C safe ops) have
been moved into static_analysis.h because this will be the new header
for static analysis related macros/defines/etc.
JIRA NVGPU-3820
Change-Id: I9c63f20f670880b420415535738034619314b7c3
Signed-off-by: Adeel Raza <araza@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2180600
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The following misra violations are fixed in the current patch.
1) misra_c_2012_directive_4_7_violation: Calling function
"nvgpu_report_host_err" which returns error information without testing
the error information.
2) misra_c_2012_directive_4_7_violation: The variable "intr_0_en_mask"
which contains error information hasn't been tested.
3) misra_c_2012_directive_4_7_violation: Calling function
"gv11b_fifo_intr_0_error_mask(g)" which returns error information
without testing the error information.
4) misra_c_2012_rule_8_6_violation: "gk20a_fifo_bar1_snooping_disable"
is declared but never defined.
5) misra_c_2012_rule_8_6_violation: "gm20b_fuse_check_priv_security" is
declared but never defined.
6) misra_c_2012_rule_8_6_violation: "gm20b_fuse_status_opt_gpc" is
declared but never defined.
Jira NVGPU-3881
Change-Id: I731cd1d99649e07cb39aa75c4715e17eedd4d927
Signed-off-by: Debarshi Dutta <ddutta@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/2188161
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GVS: Gerrit_Virtual_Submit
Reviewed-by: Vijayakumar Subbu <vsubbu@nvidia.com>
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