In case user application was interrupted while some cs still in-flight
or in the middle of completion handling in driver, the
last refcount of the kernel private data for the user process
will not be put in the fd close flow, but in the cs completion
workqueue context.
This means that the device reset-upon-device-release will be called
from that context. During the reset flow, the driver flushes all the cs
workqueue to ensure that any scheduled work has run to completion,
and since we are running from the completion context we will
have deadlock.
Therefore, we need to skip flushing the workqueue in those cases.
It is safe to do it because the user won't be able to release the device
unless the workqueues are already empty.
Signed-off-by: farah kassabri <fkassabri@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Working with MMU that supports multiple page sizes requires that mapping
of a page of a certain size will be aligned to the same size (e.g. the
physical address of 32MB page shall be aligned to 32MB).
To achieve this the gen_poll allocation is now using the "align" variant
to comply with the alignment requirements.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
There are a few events that can arrive from the f/w and without proper
handling can cause errors to appear in the kernel log without reason.
Add the relevant handling that was missing.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Various AXI errors can occur in the NIC engines and are reported to
the driver by the f/w. Add code to print the errors and ack them to
the f/w.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
In future ASICs the MMU will be able to work with multiple page sizes,
thus a new flag is added to allow the user to set the requested page
size.
This flag is added since the whole DRAM is allocated for the user and
the user also should be familiar with the memory usage use case.
As such, the user may choose to "over allocate" memory in favor of
performance (for instance- large page allocations covers more memory
in less TLB entries).
For example: say available page sizes are of 1MB and 32MB. If user
wants to allocate 40MB the user can either set page size to 1MB and
allocate the exact amount of memory (but will result in 40 TLB entries)
or the user can use 32MB pages, "waste" 8MB of physical memory but
occupy only 2 TLB entries.
Note that this feature will be available only to ASIC that supports
multiple DRAM page sizes.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Fix the following compilation warning in
hl_cb_ioctl() @ command_buffer.c:
warning: ‘device_va’ may be used uninitialized in this function
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
For current devices there is a need to send the max power value to F/W
during device init, for example because there might be several card
types.
In future devices, this info will be programmed in the device's EEPROM
and will be read by F/W, and hence the driver should not send it.
Modify the sending of the relevant message to be done only for ASIC
types that need it.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
The max_power variable which is used for calculating the device
utilization is the ASIC specific property which is set during init.
However, the max value can be modified via sysfs, and thus the updated
value in the device structure should be used instead.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
On Goya and Gaudi, the stop-on-error configuration can be set via
debugfs. However, in future devices, this configuration will always be
enabled.
Modify the debugfs node to be allowed only for ASICs that support this
dynamic configuration.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Use of vfree(), vmalloc_user(), vmalloc() and remap_vmalloc_range()
requires this include in some architectures.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
When the code iterates over the free list of physical pages nodes, it
deletes the physical page node which is used as the iterator.
Therefore, we need to use the safe version of the iteration to prevent
use-after-free.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
The iATU is an internal h/w machine inside Habana's PCI controller.
Mentioning it by name doesn't say anything to the user. It is better
to say the PCI controller initialization was not done successfully.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Timestamp registration API allows the user to register
a timestamp record event which will make the driver set
timestamp when CQ counter reaches the target value
and write it to a specific location specified
by the user.
This is a non blocking API, unlike the wait_for_interrupt
which is a blocking one.
Signed-off-by: farah kassabri <fkassabri@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Scenario:
1. CS which is part of encaps signal has been completed and now
executing kref_put to its encaps signal handle. The refcount of the
handle decremented to 0, and called the encaps signal handle
release function - hl_encaps_handle_do_release.
2. At this point the user starts waiting on the signal, and finds the
encaps signal handle in the handlers list and increment the habdle
refcount to 1.
3. Immediately after, hl_encaps_handle_do_release removed the handle
from the list and free its memory.
4. Wait function using the handle although it has been freed.
This scenario caused the slab area which was previously allocated
for the handle to be poison overwritten which triggered kernel bug
the next time the OS needed to allocate this slab.
Fixed by getting the refcount of the handle only in case it is not
zero.
Signed-off-by: Dani Liberman <dliberman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Smatch warns that:
drivers/misc/habanalabs/common/command_buffer.c:471 hl_cb_ioctl()
error: uninitialized symbol 'device_va'.
Which is true, but harmless. Anyway, it's easy to silence this by
adding a error check.
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
We print detailed messages inside the internal ioctl functions. No need
to print a generic message at the end, it doesn't add any information.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
The heartbeat thread is active during soft-reset, and it tries to send
messages to CPU-CP core.
Within the soft-reset, in the time window in which the device is marked
as disabled, any CPU-CP command is "silently" skipped and a success
value it returned.
However, in addition to the return value, the heartbeat function also
checks the F/W result, but because no command is sent in this time
window, the result variable won't hold the expected value and we will
have a false heartbeat failure.
To avoid it, modify the "silent" skip to be done only in hard-reset.
The CPU-CP should be able to handle messages during soft-reset.
In addition to the heartbeat problem, this should also solve other
issues in other flows that send messages during soft-reset and use the
F/W result as it w/o being aware to the reset.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
There is a race in the user interrupts code, where between checking
the target value and adding the new pend to the list, there is a chance
the interrupt happened.
In that case, no one will complete the node, and we will get a timeout
on it.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
When timeout is 0, we need to return the busy status in case the
target value wasn't reached upon entry to the ioctl.
Also return the correct timestamp.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This is not something we can do a workaround. It is clearly an error
and we should notify the user that it is an error.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Currently we only expose to the user the ID of the first available
user interrupt. To make user interrupts allocation truly dynamic, we
need to also expose the number of user interrupts.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Add a missing error check in the sysfs show function for max_power.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
In case of soft reset failure, hard reset should be initiated, but
reset flags were not set to enable it, which caused another soft reset
followed by another failure.
Updated reset flags to enable hard reset flow in case of soft reset
failure.
Signed-off-by: Dani Liberman <dliberman@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Add a missing error check in the sysfs show functions for
clk_max_freq_mhz and clk_cur_freq_mhz_show.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
If reading PLL info from F/W fails, the PLL info is not set in the
"result" variable, and hence shouldn't be copied to the caller's array.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Freeing phys_pg_pack includes calling to scrubbing functions of the
device's memory, taking locks and possibly even calling reset.
This is not something that should be done while holding a device-wide
spinlock.
Therefore, save the relevant objects on a local linked-list and after
releasing the spinlock, traverse that list and free the phys_pg_pack
objects.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
In order to support several device MMU blocks with different
architectures (e.g. different HOP table size) we need to move to
per-MMU properties rather than keeping those properties as ASIC
properties.
Refactoring the code to use "per-MMU proprties" is a major effort.
To start making the transition towards this goal but still support
taking the properties from ASIC properties (for code that currently
uses them) this patch copies some of the properties to the "per-MMU"
properties and later, when implementing the per-MMU properties, we
would be able to delete the MMU props from the ASIC props.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
In future ASICs, there is no kernel TDR for new workloads that are
submitted directly from user-space to the device.
Therefore, the driver can NEVER know that a workload has timed-out.
So, when the user asks us to wait for interrupt on the workload's
completion, and the wait has timed-out, it doesn't mean the workload
has timed-out. It only means the wait has timed-out, which is NOT an
error from driver's perspective.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Adds new sysfs entry to display firmware os version
/sys/class/habanalabs/hl<n>/fw_os_ver
Signed-off-by: Rajaravi Krishna Katta <rkatta@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
We have a common function that wraps the call to the MMU cache
invalidation function, which is ASIC-specific. The wrapper checks
the return value and prints error if necessary. For consistency, try
to use the wrapper when possible.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
infineon version is only applicable to GOYA and GAUDI. For later
ASICs, we display the Voltage Regulator Monitor f/w version.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
In this attribute group we are only adding clocks. This is in
preparation for adding a device specific attribute group which is
not related to clocks.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Setting PLL profile is the same for all ASICs, except for GOYA.
However, because this function is never called from common code, there
is no need to have an asic-specific callback function.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
For better maintainability, try to concentrate all the common functions
that communicate with the f/w in firmware_if.c
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
The two remaining functions in this file belong to firmware_if.c,
as they communicate with the firmware.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Retrieving the clock from the f/w is done exactly the same in ALL our
ASICs. Therefore, no real justification for doing it as an
ASIC-specific function.
The only thing is we need to check if we are running on simulator,
which doesn't require ASIC-specific callback.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Move common sysfs store/show functions to sysfs.c file for
consistency.
This is part of a patch-set to remove hwmgr.c
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Some MMU functions can be used by different versions of our MMUs, so
move them to be common.
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Now that clock gating is permanently disabled in GAUDI, no need for
the ASIC functions of setting and disabling clock gating, as this
was a unique scenario in GAUDI.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Due to the need of SynapseAI to configure all TPC engines from a single
QMAN, the driver must disable CGM and never allow the user to enable
it. Otherwise, the configuration of the TPC engines will fail.
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
This patch fixes what seems to be copy paste error.
We will have a memory leak if the host-resident shadow is NULL (which
will likely happen as the DR and HR are not dependent).
Signed-off-by: Ohad Sharabi <osharabi@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
As part of handling of the multi-CS wait ioctl, hl_cs_poll_fences() is
called in a "while (true)" loop. This function can fail, but the
checking of its return value was missed.
Add this check and exit the loop in case of a failure.
Signed-off-by: Tomer Tayar <ttayar@habana.ai>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
During the hardware start sequence, do not overwrite the driver state
and do not proceed with the initialization sequence if the state
was changed while the driver was waiting for the start interrupt.
This can happen if the driver's removal/stop procedure was triggered
from the parent level while the driver is waiting for the start
interrupt. This may lead to stray the reset work or the timer
after driver were removed.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-4-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Avoid link reset in DISABLED and POWERING_DOWN state
if read error is occurred - let shutdown flow finish.
In any state exit interrupt handler if read error occurred.
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-3-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Avoid lingering reset thread on driver shutdown.
If the firmware is down during a shutdown flow
do not initiate the link reset, simply disconnect
all clients and let shutdown flow finish
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-2-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Add a quirk to disable MEI interface on Intel PCH Ignition (IGN)
as the IGN firmware doesn't support the protocol.
Cc: <stable@vger.kernel.org>
Signed-off-by: Alexander Usyskin <alexander.usyskin@intel.com>
Signed-off-by: Tomas Winkler <tomas.winkler@intel.com>
Link: https://lore.kernel.org/r/20220215080438.264876-1-tomas.winkler@intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
