Colin Percival
f6d2c8591c
The ena_[rt]x_cleanup functions are limited internally to a maximum number of packets; this ensures that TX doesn't starve RX (or vice versa) and also attempts to ensure that we get a chance to refill the RX buffer ring before the device runs out of buffers and starts dropping packets. Historically these functions have returned the number of packets which they processed which ena_cleanup compares to their respective budgets to decide whether to reinvoke them. This is unnecessary complication; since the precise number of packets processed is never used, adjust the APIs of those functions to return a bool indicating if they want to be reinvoked (aka if they hit their limits). Since ena_tx_cleanup now only uses work_done if diagnostics are enabled (ena_log_io macros to nothing otherwise) eliminate that variable and pass its value (ENA_TX_BUDGET - budget) to ena_log_io directly. No functional change intended; this will simplify a future commit. Reviewed by: akiyano Sponsored by: Amazon MFC after: 6 days Differential Revision: https://reviews.freebsd.org/D56478
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