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Update the code that causes filter and router table caches to be
flushed so that it supports IPA versions 5.0+. It adds a comment in
ipa_hardware_config_hashing() that explains that cacheing does not
need to be enabled, just as before, because it's enabled by default.
(For the record, the FILT_ROUT_CACHE_CFG register would have been
used if we wanted to explicitly enable these.)
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Define some new registers that appear starting with IPA v5.0, along
with enumerated types identifying their fields. Code that uses
these will be added by upcoming patches.
Most of the new registers are related to filter and routing tables,
and in particular, their "hashed" variant. These tables are better
described as "cached", where a hash value determines which entries
are cached. From now on, naming related to this functionality will
use "cache" instead of "hash", and that is reflected in these new
register names. Some registers for managing these caches and their
contents have changed as well.
A few other new field definitions for registers (unrelated to table
caches) are also defined.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The IP_PACKET_INIT immediate command defines the destination
endpoint to which a packet should be sent. Prior to IPA v5.0, a
5 bit field in that command represents the endpoint, but starting
with IPA v5.0, the field is extended to 8 bits to support more than
32 endpoints.
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Increase the number of endpoints supported by the driver to 36,
which IPA v5.0 supports. This makes it impossible to check at build
time whether the supported number is too big to fit within the
(5-bit) PACKET_INIT destination endpoint field. Instead, convert
the build time check to compare against what fits in 8 bits.
Add a check in ipa_endpoint_config() to also ensure the hardware
reports an endpoint count that's in the expected range. Just
open-code 32 as the limit (the PACKET_INIT field mask is not
available where we'd want to use it).
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Replace the enable_irq_wake() call with one to dev_pm_set_wake_irq()
instead. This will let the dev PM framework automatically manage the
the wakeup capability of the ipa IRQ and ensure that userspace requests
to enable/disable wakeup for the IPA via sysfs are respected.
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20230127202758.2913612-1-caleb.connolly@linaro.org
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Update ipa_status_extract() to support IPA v5.0 and beyond. Because
the format of the IPA packet status depends on the version, pass an
IPA pointer to the function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Stop assuming the IPA packet status has a fixed format (defined by
a C structure). Instead, use a function to extract each field from
a block of data interpreted as an IPA packet status. Define an
enumerated type that identifies the fields that can be extracted.
The current function extracts fields based on the existing
ipa_status structure format (which is no longer used).
Define IPA_STATUS_RULE_MISS, to replace the calls to field_max() to
represent that condition; those depended on the knowing the width of
a filter or router rule in the IPA packet status structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The next patch reworks how the IPA packet status structure is
interpreted. This patch does some preparatory work, to make it
easier to see the effect of that change:
- Change a few functions that access fields in a IPA packet status
structure to store field values in local variables with names
related to the field.
- Pass a void pointer rather than an (equivalent) status pointer
to two functions called by ipa_endpoint_status_parse().
- Use "rule" rather than "val" as the name of a variable that
holds a routing rule ID.
- Consistently use "IPA packet status" rather than "status
element" when referring to this data structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Define the remaining values for opcode and exception fields in the
IPA packet status structure. Most of these values are powers-of-2,
suggesting they are meant to be used as bitmasks, but that is not
the case. Add comments to be clear about this, and express the
values in decimal format.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Rename the ipa_nat_en enumerated type to be ipa_nat_type, and rename
its symbols accordingly. Add a comment indicating those values are
also used in the IPA status nat_type field.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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There is a 16 bit status mask defined in the IPA packet status
structure, of which only one (TAG_VALID) is currently used.
Define all other IPA status mask values in an enumerated type whose
numeric values are bit mask values (in CPU byte order) in the status
mask. Use the TAG_VALID value from that type rather than defining a
separate field mask.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The IPA packet status structure changes in IPA v5.0 in ways that are
difficult to represent cleanly. As a small step toward redefining
it as a parsed block of data, use a constant to define its size,
rather than the size of the IPA status structure type.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The packet length encoded in an IPA packet status buffer is computed
more than once in ipa_endpoint_status_parse(). It is also checked
again in ipa_endpoint_status_skip(), which that function calls.
Compute the length once, and use that computed value later rather
than recomputing it. Check for it being zero in the parse function
rather than in ipa_endpoint_status_skip().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The internal mechanisms support this, but instead of exposting the gfp to
the caller it wrappers it into iommu_map() and iommu_map_atomic()
Fix this instead of adding more variants for GFP_KERNEL_ACCOUNT.
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/1-v3-76b587fe28df+6e3-iommu_map_gfp_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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drivers/net/ipa/ipa_interrupt.c
drivers/net/ipa/ipa_interrupt.h
9ec9b2a30853 ("net: ipa: disable ipa interrupt during suspend")
8e461e1f092b ("net: ipa: introduce ipa_interrupt_enable()")
d50ed3558719 ("net: ipa: enable IPA interrupt handlers separate from registration")
https://lore.kernel.org/all/20230119114125.5182c7ab@canb.auug.org.au/
https://lore.kernel.org/all/79e46152-8043-a512-79d9-c3b905462774@tessares.net/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The IPA interrupt can fire when pm_runtime is disabled due to it racing
with the PM suspend/resume code. This causes a splat in the interrupt
handler when it tries to call pm_runtime_get().
Explicitly disable the interrupt in our ->suspend callback, and
re-enable it in ->resume to avoid this. If there is an interrupt pending
it will be handled after resuming. The interrupt is a wake_irq, as a
result even when disabled if it fires it will cause the system to wake
from suspend as well as cancel any suspend transition that may be in
progress. If there is an interrupt pending, the ipa_isr_thread handler
will be called after resuming.
Fixes: 1aac309d3207 ("net: ipa: use autosuspend")
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
Reviewed-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20230115175925.465918-1-caleb.connolly@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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drivers/net/usb/r8152.c
be53771c87f4 ("r8152: add vendor/device ID pair for Microsoft Devkit")
ec51fbd1b8a2 ("r8152: add USB device driver for config selection")
https://lore.kernel.org/all/20230113113339.658c4723@canb.auug.org.au/
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Commit b310de784bacd ("net: ipa: add IPA v4.7 support") was merged
despite an unresolved comment made by Konrad Dybcio. Konrad
observed that the IMEM region specified for IPA v4.7 did not match
that used downstream for the SM7225 SoC. In "lagoon.dtsi" present
in a Sony Xperia source tree, a ipa_smmu_ap node was defined with a
"qcom,additional-mapping" property that defined the IPA IMEM area
starting at offset 0x146a8000 (not 0x146a9000 that was committed).
The IPA v4.7 target system used for testing uses the SM7225 SoC, so
we'll adhere what the downstream code specifies is the address of
the IMEM region used for IPA.
Link: https://lore.kernel.org/linux-arm-msm/20221208211529.757669-1-elder@linaro.org
Fixes: b310de784bac ("net: ipa: add IPA v4.7 support")
Tested-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Alex Elder <elder@linaro.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We can call the two IPA interrupt handler functions directly;
there's no need to maintain the array of handler function pointers
any more.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The dynamic assignment of IPA interrupt handlers isn't needed; we
only handle three IPA interrupt types, and their handler functions
are now assigned directly. We can get rid of ipa_interrupt_add()
and ipa_interrupt_remove() now, because they serve no purpose.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Declare the microcontroller IPA interrupt handler publicly, and
assign it directly in ipa_interrupt_config(). Make the SUSPEND IPA
interrupt handler public, and rename it ipa_power_suspend_handler().
Assign it directly in ipa_interrupt_config() as well.
This makes it unnecessary to do this in ipa_interrupt_add(). Make
similar changes for removing IPA interrupt handlers.
The next two patches will finish the cleanup, removing the
add/remove functions and the handler array entirely.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Expose ipa_interrupt_enable() and have functions that register
IPA interrupt handlers enable them directly, rather than having the
registration process do that. Do the same for disabling IPA
interrupt handlers.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Create new function ipa_interrupt_enable() to encapsulate enabling
one of the IPA interrupt types. Introduce ipa_interrupt_disable()
to reverse that operation. Add a helper function to factor out the
common register update used by both.
Use these in ipa_interrupt_add() and ipa_interrupt_remove().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The prototype for an IPA interrupt handler supplies the IPA
interrupt ID, so it's possible to use a single function to handle
any type of microcontroller interrupt.
Introduce ipa_uc_interrupt_handler(), which calls the event or the
response handler depending on the IRQ ID provided. Register the new
function as the handler for both microcontroller IPA interrupt types.
The called functions don't use their "irq_id" arguments, so remove
them.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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It is now possible for a system to have more than 32 endpoints. As
a result, registers related to endpoint suspend are parameterized,
with 32 endpoints represented in one more registers.
In ipa_interrupt_suspend_control(), the IPA_SUSPEND_EN register
offset is determined properly, but the bit mask used still assumes
the number of enpoints won't exceed 32. This is a bug. Fix it.
Fixes: f298ba785e2d ("net: ipa: add a parameter to suspend registers")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add the necessary register and data definitions needed for IPA v4.7,
which is found on the SM6350 SoC.
Co-developed-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Luca Weiss <luca.weiss@fairphone.com>
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Follow the advice of the Documentation/filesystems/sysfs.rst and show()
should only use sysfs_emit() or sysfs_emit_at() when formatting the
value to be returned to user space.
Signed-off-by: ye xingchen <ye.xingchen@zte.com.cn>
Reviewed-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Dan Carpenter reported that Smatch found an instance where a pointer
which had previously been assumed could be null (as indicated by a
null check) was later dereferenced without a similar check.
In practice this doesn't lead to a problem because currently the
pointers used are all non-null. Nevertheless this patch addresses
the reported problem.
In addition, I spotted another bug that arose in the same commit.
When the command to initialize a routing table memory region was
added, the number of entries computed for the non-hashed table
was wrong (it ended up being a Boolean rather than the count
intended). This bug is fixed here as well.
Reported-by: Dan Carpenter <error27@gmail.com>
Link: https://lore.kernel.org/kernel-janitors/Y3OOP9dXK6oEydkf@kili
Tested-by: Caleb Connolly <caleb.connolly@linaro.com>
Fixes: 5cb76899fb47 ("net: ipa: reduce arguments to ipa_table_init_add()")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Define a new value "skip" for the "qcom,gsi-loader" Device Tree
property. If used, it indicates that neither the AP nor the modem
need to load GSI firmware (because it has already been loaded--for
example by the boot loader).
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Introduce a new way of specifying how the GSI firmware gets loaded
for IPA. Currently, this is indicated by the presence or absence of
the Boolean "modem-init" Device Tree property. The new property
must have a value--either "self" or "modem"--which indicates whether
the AP or modem is the GSI firmware loader, respectively.
For legacy systems, the new property will not exist, and the
"modem-init" property will be used. For newer systems, the
"qcom,gsi-loader" property *must* exist, and must have one of the
two prescribed values. It is an error to have both properties
defined, and it is an error for the new property to have an
unrecognized value.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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The GSI layer used for IPA requires firmware to be loaded.
Currently either the AP or the modem loads the firmware,
distinguished by whether the "modem-init" Device Tree
property is defined.
Some newer systems implement a third option. In preparation for
that, encapsulate the code that determines how the GSI firmware
gets loaded in a new function, ipa_firmware_loader().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Replace the 32-bit unsigned used to track enabled endpoints with a
Linux bitmap, to allow an arbitrary number of endpoints to be
represented.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Replace the 32-bit unsigned used to track endpoints that have
completed setup with a Linux bitmap, to allow an arbitrary number
of endpoints to be represented.
Rework the error handling in ipa_endpoint_init() so the defined
endpoint bitmap is freed if an error occurs early. Once endpoints
have been initialized, ipa_endpoint_exit() is used to recover if
the set of filtered endpoints is invalid.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Prior to IPA v5.0, there could be no more than 32 endpoints.
A filter table begins with a bitmap indicating which endpoints have
a filter defined. That bitmap is currently assumed to fit in a
32-bit value.
Starting with IPA v5.0, more than 32 endpoints are supported, so
it's conceivable that a TX endpoint has an ID that exceeds 32.
Increase the size of the field representing endpoints that support
filtering to 64 bits. Rename the bitmap field "filtered".
Unlike other similar fields, we do not use an (arbitrarily long)
Linux bitmap for this purpose. The reason is that if a filter table
ever *did* need to support more than 64 TX endpoints, its format
would change in ways we can't anticipate.
Have ipa_endpoint_init() return a negative errno rather than a mask
that indicates which endpoints support filtering, and have that
function assign the "filtered" field directly.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Similar to the previous patch, replace the 32-bit unsigned used to
track endpoints supported by hardware with a Linux bitmap, to allow
an arbitrary number of endpoints to be represented.
Move ipa_endpoint_deconfig() above ipa_endpoint_config() and use
it in the error path of the latter function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IPA v5.0 supports more than 32 endpoints, so we will be unable to
represent endpoints defined in the configuration data with a 32-bit
value. To prepare for that, convert the field in the IPA structure
representing defined endpoints to be a Linux bitmap.
Convert loops based on that field into for_each_set_bit() calls over
the new bitmap. Note that the loop in ipa_endpoint_config() still
assumes there are 32 or fewer endpoints (when comparing against the
available endpoint bit mask); that assumption goes away in the next
patch.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The SUSPEND_INFO, SUSPEND_EN, SUSPEND_CLR registers represent
endpoint IDs in a bit mask. When more than 32 endpoints are
supported, these registers will be replicated as needed to represent
the number of supported endpoints. Update the definitions of these
registers to have a stride of 4 bytes, and update the code that
operates them to select the proper offset and bit.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Starting with IPA v5.0, a single IPA instance can have more than 32
endpoints defined. To handle this, each register that holds a
bitmap of IPA endpoints is replicated as needed to represent the
available endpoints.
To prepare for this, registers that represent endpoint IDs in a bit
mask will be defined to have a parameter, with a stride value of 4
bytes. The first 32 endpoints are represented in the first 32-bit
register, then the next (up to) 32 endpoints at an offset 4 bytes
higher. When accessing such a register, the endpoint ID divided
by 32 determines the offset, and the endpoint ID modulo 32 defines
the endpoint's bit position within the register.
The first two registers we'll update for this are STATE_AGGR_ACTIVE
and AGGR_FORCE_CLOSE.
Until more than 32 endpoints are supported, this change has no
practical effect.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Similar to the previous commit, pass flags rather than a memory
region ID to ipa_table_reset_add(), and there use ipa_table_mem() to
look up the memory region affected based on those flags.
Currently all eight of these table memory regions are assumed to
exist, because they all have canaries within them. Stop assuming
that will always be the case, and in ipa_table_reset_add() allow
these memory regions to be non-existent.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Recently ipa_table_mem() was added as a way to look up one of 8
possible memory regions by indicating whether it was a filter or
route table, hashed or not, and IPv6 or not.
We can simplify the interface to ipa_table_init_add() by passing two
flags to it instead of the opcode and both hashed and non-hashed
memory region IDs. The "filter" and "ipv6" flags are sufficient to
determine the opcode to use, and with ipa_table_mem() can look up
the correct memory region as well.
It's possible to not have hashed tables, but we already verify the
number of entries in a filter or routing table is nonzero. Stop
assuming a hashed table entry exists in ipa_table_init_add().
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Define a new field in the IPA structure that records the maximum
number of entries that will be used in the IPA endpoint array. Use
that value rather than IPA_ENDPOINT_MAX to determine the end
condition for two loops that iterate over all endpoints.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Each endpoint ID has an entry in the IPA endpoint array. But the
size of that array is defined at compile time. Instead, rename
ipa_endpoint_data_valid() to be ipa_endpoint_max() and have it
return the maximum endpoint ID defined in configuration data.
That function will still validate configuration data.
Zero is returned on error; it's a valid endpoint ID, but we need
more than one, so it can't be the maximum. The next patch makes use
of the returned maximum value.
Finally, rename the "initialized" mask of endpoints defined by
configuration data to be "defined".
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Change two functions that iterate over all endpoints to use while
loops, using "endpoint_id" as the index variables in both spots.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Ensure all defined TX endpoints are in the range [0, CONS_PIPES) and
defined RX endpoints are within [PROD_LOWEST, PROD_LOWEST+PROD_PIPES).
Modify the way local variables are used to make the checks easier
to understand. Check for each endpoint being in valid range in the
loop, and drop the logical-AND check of initialized against
unavailable IDs.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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IPA v5.0 eliminates the global filter table entry. As a result,
there is no need to shift the filtered endpoint bitmap when it is
written to IPA local memory.
Update comments to explain this. Also delete a redundant block of
comments above the function.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Don't require IPA v5.0 to have a STATS_TETHERING memory region.
Downstream defines its size to 0, so it apparently is unused.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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In preparation for adding support for IPA v5.0, define it as an
understood version.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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drivers/net/can/usb/kvaser_usb/kvaser_usb_leaf.c
2871edb32f46 ("can: kvaser_usb: Fix possible completions during init_completion")
abb8670938b2 ("can: kvaser_usb_leaf: Ignore stale bus-off after start")
8d21f5927ae6 ("can: kvaser_usb_leaf: Fix improved state not being reported")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Currently we assume that any filter table contains a fixed number
of entries. Like routing tables, the number of entries in a filter
table is limited only by the size of the IPA-local memory region
used to hold the table.
Stop assuming that a filter table has exactly 14 entries. Instead,
determine the number of entries in a routing table by dividing its
memory region size by the size of an entry. (Note that the first
"entry" in a filter table contains an endpoint bitmap.)
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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Currently all platforms are assumed allot 8 routing table entries
for use by the modem. Instead, add a new configuration data entry
that defines the number of modem routing table entries, and record
that in the IPA structure.
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
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