Adding netmap module dependency in this patch (it was added in the previous one by accident)

Due to pmap_change_attr() being public on arm64, the patch was reworked to use it instead

Remove spurious comment about barrier

Mark the code as ARM/ARM64 specific and change barrier, to order only loads.

Fix style issues and invalid conditional check

Fix building error introduced by the r325506 by casting csum_flags to uint64_t

Fix typo in printout

• Change M_NOWAIT to M_WAITOK on taskqueue_create_fast
• Style fix

In D12855#269430, @byenduri_gmail.com wrote:

Curious as to how this was tested since I assume 'out of order RX descriptors' condition is not common.

• Expand goto if retrieving RX mbuf fails
• Fix error handling routine by assigning value to free_rx_ids instead of tx

Removed unused macro and additional whitespace

Fix conflicts with recent update to D12860

The boolean variables are no longer compared explicitly to true/false.

Update due to conflict with recent fix in the:
D12853 Fix ENA driver error handling in attach and basic style fixes

Remove checking for NULL after calling malloc with M_WAITOK flag

Fixes from review:

• Remove checking for NULL after calling malloc with M_WAITOK flag

In D12143#252641, @rlibby wrote:

By the way the files in this review still have the wrong mode bits (100755 instead of 100644, need chmod a-x).

We were waiting for Linux community to accept ena_com patch (common code for both FreeBSD and Linux), but to do not waste more time, we decided to upload fix to issue with uint64_t being defined as unsigned long on amd64 on FreeBSD, and on Linux it is being defined as unsigned long long.

• Remove non-generic ENA_MEMCPY_TO_DEVICE_64
• Fix ENA_MEMCPY_TO_DEVICE_64

• The ena_efa files were removed
• Removed usage of LinuxKPI
• Implement macro ENA_MEMCPY_TO_DEVICE_64 in ena_plat.h file

Thanks Ryan for checking build with gcc and review.

• Add manual entry for the driver

Add new patchset. Manual and legal issues will be added in patchset 3.