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  1. 29 11月, 2020 6 次提交
    • A
      net: ipa: adjust GSI register addresses · cdeee49f
      由 Alex Elder 提交于 
      The offsets for almost all GSI registers we use have different
offsets starting at IPA version 4.5.  Only two registers remain
in their original location.

In a way though, the new register locations are not *that*
different.  The entire group of affected registers has simply
been shifted down in memory by a fixed amount (0xd000).  So for
example, the channel context 0 register that has a base offset of
0x0001c000 for "older" hardware now has a base offset of 0x0000f000.

This patch aims to add support for IPA v4.5 registers at their new
offets in a way that minimizes the amount of code that needs to
change.  It is not ideal, but it avoids the need to maintain
a nearly complete set of additional register offset definitions.

The approach takes advantage of the fact that when accessing GSI
registers we do not access any of memory at lower end of the "gsi"
memory range (with two exceptions already noted).  In particular,
we do not access anything within the bottom 0xd000 bytes of the
GSI memory range.

For IPA version 4.5, after we map the GSI memory, we adjust the
virtual memory pointer downward by the fixed amount (0xd000).
That way, register accesses using the offsets defined by the
existing GSI_REG_*() macros will resolve to the proper locations
for IPA version 4.5.

The two registers *not* affected by this offset are accessed only
in gsi_irq_setup().  There, for IPA version 4.5, we undo the general
register adjustment by adding the fixed amount back to the virtual
address to access these registers.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      cdeee49f
    • A
      net: ipa: update gsi registers for IPA v4.5 · b0b6f0dd
      由 Alex Elder 提交于 
      Very few GSI register definitions change for IPA v4.5, however
as a group their position in memory shifts a constant amount
(handled by the next commit).

Add definitions and update comments to the set of GSI registers to
support changes that come with IPA v4.5.

Update the logic in gsi_channel_program() to accommodate the new
(expanded) PREFETCH_MODE field in the CH_C_QOS register.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      b0b6f0dd
    • A
      net: ipa: add support to code for IPA v4.5 · 8bfc4e21
      由 Alex Elder 提交于 
      Update the IPA code to make use of the updated IPA v4.5 register
definitions.  Generally what this patch does is, if IPA v4.5
hardware is in use:
  - Ensure new registers or fields in IPA v4.5 are updated where
    required
  - Ensure registers or fields not supported in IPA v4.5 are not
    examined when read, or are set to 0 when written
It does this while preserving the existing functionality for IPA
versions lower than v4.5.

The values to program for QSB_MAX_READS and QSB_MAX_WRITES and the
source and destination resource counts are updated to be correct for
all versions through v4.5 as well.

Note that IPA_RESOURCE_GROUP_SRC_MAX and IPA_RESOURCE_GROUP_DST_MAX
already reflect that 5 is an acceptable number of resources (which
IPA v4.5 implements).
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      8bfc4e21
    • A
      net: ipa: add new most-significant bits to registers · 1af15c2a
      由 Alex Elder 提交于 
      IPA v4.5 adds a few fields to the endpoint header and extended
header configuration registers that represent new high-order bits
for certain offsets and sizes.  Add code to incorporate these upper
bits into the registers for IPA v4.5.

This includes creating ipa_header_size_encoded(), which handles
encoding the metadata offset field for use in the ENDP_INIT_HDR
register in a way appropriate for the hardware version.  This and
ipa_metadata_offset_encoded() ensure the mask argument passed to
u32_encode_bits() is constant.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      1af15c2a
    • A
      net: ipa: update IPA registers for IPA v4.5 · 5b6cd69e
      由 Alex Elder 提交于 
      Update "ipa_reg.h" so that register definitions support IPA hardware
version 4.5, in addition to versions 3.5.1 through v4.2.  Most of
the register definitions are the same, but in some cases fields are
added, changed, or eliminated.

Updates for a few IPA v4.5 registers are more complex, and adding
those definition will be deferred to separate patches.  This patch
only updates the register offset and field definitions, and adds
informational comments.

The only code change avoids accessing the backward compatibility
register for IPA version 4.5 in ipa_hardware_config().  Other IPA
v4.5-specific code changes will come later.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      5b6cd69e
    • A
      net: ipa: reverse logic on escape buffer use · 9f848198
      由 Alex Elder 提交于 
      Starting with IPA v4.2 there is a GSI channel option to use an
"escape buffer" instead of prefetch buffers.  This should be used
for all channels *except* the AP command TX channel.  The logic
that implements this has it backwards; fix this bug.
Signed-off-by: NAlex Elder <elder@linaro.org>
Signed-off-by: NJakub Kicinski <kuba@kernel.org>
      9f848198
  3. 28 11月, 2020 6 次提交
  5. 27 11月, 2020 3 次提交
  7. 26 11月, 2020 25 次提交