diff options
| author | Julian Wiedmann <jwi@linux.ibm.com> | 2021-06-11 09:33:34 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2021-06-11 12:49:15 -0700 |
| commit | 7a4b92e8e0de9cbbb623310af76b1d60cd344b1d (patch) | |
| tree | ee81c598aeb2a729a03cc91c66e09a20e509e687 /drivers/s390/net/qeth_core.h | |
| parent | e872d0c1249be74a65723664a329ef5a9113cc40 (diff) | |
s390/qeth: also use TX NAPI for non-IQD devices
Set scan_threshold = 0 to opt out from the qdio layer's internal tasklet
& timer mechanism for TX completions, and replace it with the TX NAPI
infrastructure that qeth already uses for IQD devices. This avoids the
fragile logic in qdio_check_output_queue(), enables tighter integration
and gives us more tuning options via ethtool in the future.
For now we continue to apply the same policy as the qdio layer:
scan for completions if 32 TX buffers are in use, or after 1 sec.
A re-scan is done after 10 sec, but only if no TX interrupt is pending.
With scan_threshold = 0 we no longer get TX completion scans from
within qdio_get_next_buffers(). So trigger these manually in qeth_poll()
and in the RX path switch to the equivalent qdio_inspect_queue().
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/s390/net/qeth_core.h')
| -rw-r--r-- | drivers/s390/net/qeth_core.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/s390/net/qeth_core.h b/drivers/s390/net/qeth_core.h index 3a49ef8dd906..4d29801bcf41 100644 --- a/drivers/s390/net/qeth_core.h +++ b/drivers/s390/net/qeth_core.h @@ -527,6 +527,7 @@ struct qeth_qdio_out_q { unsigned int coalesce_usecs; unsigned int max_coalesced_frames; + unsigned int rescan_usecs; }; #define qeth_for_each_output_queue(card, q, i) \ @@ -887,6 +888,11 @@ static inline bool qeth_card_hw_is_reachable(struct qeth_card *card) return card->state == CARD_STATE_SOFTSETUP; } +static inline bool qeth_use_tx_irqs(struct qeth_card *card) +{ + return !IS_IQD(card); +} + static inline void qeth_unlock_channel(struct qeth_card *card, struct qeth_channel *channel) { |