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>

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>

Verify that the sizes of the routing and filter table memory regions
are valid as part of memory initialization, rather than waiting for
table initialization.  The main reason to do this is that upcoming
patches use these memory region sizes to determine the number of
entries in these tables, and we'll want to know these sizes are good
sooner.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

What ipa_table_valid() (and ipa_table_valid_one(), which it calls)
does is ensure that the memory regions that hold routing and filter
tables have reasonable size.  Specifically, it checks that the size
of a region is sufficient (or rather, exactly the right size) to
hold the maximum number of entries supported by the driver.  (There
is an additional check that's erroneous, but in practice it is never
reached.)

Recently ipa_table_mem_valid() was added, which is called by
ipa_table_init().  That function verifies that all table memory
regions are of sufficient size, and requires hashed tables to have
zero size if hashing is not supported.  It only ensures the filter
table is large enough to hold the number of endpoints that support
filtering, but that is adequate.

Therefore everything that ipa_table_valid() does is redundant, so
get rid of it.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Currently, ipa_cmd_data_valid() is called by ipa_mem_config().
Nothing it does requires access to hardware though, so it can be
done during the init phase of IPA driver startup.

Create a new function ipa_cmd_init(), whose purpose is to do early
initialization related to IPA immediate commands.  It will call the
build-time validation function, then will make the two calls made
previously by ipa_cmd_data_valid().  This make ipa_cmd_data_valid()
unnecessary, so get rid of it.

Rename ipa_cmd_header_valid() to be ipa_cmd_header_init_local_valid(),
so its name is clearer about which IPA immediate command it is
associated with.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

Some source files state copyright dates that are earlier than the
last modification of the file.  Change the copyright year to 2022 in
all such cases.

Signed-off-by: Alex Elder <elder@linaro.org>
Link: https://lore.kernel.org/r/20220930224549.3503434-1-elder@linaro.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Define the fields for the LOCAL_PKT_PROC_CNTXT, COUNTER_CFG, and
IPA_TX_CFG IPA registers for all supported IPA versions.

Create enumerated types to identify fields for these IPA registers.
Use IPA_REG_FIELDS() to specify the field mask values defined for
these registers, for each supported version of IPA.

Use ipa_reg_bit() and ipa_reg_encode() to build up the values to be
written to these registers.  Remove the definition of the *_FMASK
symbols as well as proc_cntxt_base_addr_encoded(), because they are
no longer needed.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Define the fields for the SHARED_MEM_SIZE, QSB_MAX_WRITES,
QSB_MAX_READS, FILT_ROUT_HASH_EN, and FILT_ROUT_HASH_FLUSH IPA
registers for all supported IPA versions.

Create enumerated types to identify fields for these registers.  Use
IPA_REG_FIELDS() to specify the field mask values defined for these
registers, for each supported version of IPA.

Use ipa_reg_bit() and ipa_reg_encode() to build up the values to be
written to these registers rather than using the *_FMASK
preprocessor symbols.

Remove the definition of the now unused *_FMASK symbols.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Create a new function that returns a register descriptor given its
ID.  Change ipa_reg_offset() and ipa_reg_n_offset() so they take a
register descriptor argument rather than an IPA pointer and register
ID.  Have them accept null pointers (and return an invalid 0 offset),
to avoid the need for excessive error checking.  (A warning is issued
whenever ipa_reg() returns 0).

Call ipa_reg() or ipa_reg_n() to look up information about the
register before calls to ipa_reg_offset() and ipa_reg_n_offset().
Delay looking up offsets until they're needed to read or write
registers.

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

Expose two inline functions that return the offset for a register
whose ID is provided; one of them takes an additional argument
that's used for registers that are parameterized.  These both use
a common helper function __ipa_reg_offset(), which just uses the
offset symbols already defined.

Replace all references to the offset macros defined for IPA
registers with calls to ipa_reg_offset() or ipa_reg_n_offset().

Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>