iwlwifi: pcie: use partial pages if applicable

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If we have only 2k RBs like on the latest (AX210) hardware, then
even on x86 where PAGE_SIZE is 4k we currently waste half of the
memory.

If this is the case, return partial pages from the allocator and
track the offset in each RBD (to be able to find the data in them
and remap them later.)

This might also address other platforms with larger PAGE_SIZE by
putting more RBs into a single large page.

Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>

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This commit is contained in:

Johannes Berg 2019-10-02 12:11:54 +02:00 • committed by Luca Coelho

parent 80084e3591

commit cfdc20efeb

3 changed files with 70 additions and 13 deletions

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14

drivers/net/wireless/intel/iwlwifi/pcie/internal.h

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59

drivers/net/wireless/intel/iwlwifi/pcie/rx.c

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10

drivers/net/wireless/intel/iwlwifi/pcie/trans.c

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