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sfc: on 8000 series use TX queues for TX timestamps

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For this we create and use one or more new TX queues on the PTP channel,
 and enable sync events for it.
Based on a patch by Martin Habets <mhabets@solarflare.com>.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Edward Cree
2018-01-25 17:26:06 +00:00
committed by David S. Miller
parent c1d0d33946
commit 2935e3c382
6 changed files with 54 additions and 13 deletions
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20
drivers/net/ethernet/sfc/ptp.c
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@@ -341,6 +341,14 @@ bool efx_ptp_use_mac_tx_timestamps(struct efx_nic *efx)
));
}
/* PTP 'extra' channel is still a traffic channel, but we only create TX queues
* if PTP uses MAC TX timestamps, not if PTP uses the MC directly to transmit.
*/
bool efx_ptp_want_txqs(struct efx_channel *channel)
{
return efx_ptp_use_mac_tx_timestamps(channel->efx);
}
#define PTP_SW_STAT(ext_name, field_name) \
{ #ext_name, 0, offsetof(struct efx_ptp_data, field_name) }
#define PTP_MC_STAT(ext_name, mcdi_name) \
@@ -1321,10 +1329,13 @@ int efx_ptp_probe(struct efx_nic *efx, struct efx_channel *channel)
goto fail2;
}
if (efx_ptp_use_mac_tx_timestamps(efx))
if (efx_ptp_use_mac_tx_timestamps(efx)) {
ptp->xmit_skb = efx_ptp_xmit_skb_queue;
else
ptp->xmit_skb = efx_ptp_xmit_skb_mc;
/* Request sync events on this channel. */
channel->sync_events_state = SYNC_EVENTS_QUIESCENT;
} else {
ptp->xmit_skb = efx_ptp_xmit_skb_mc;
}
INIT_WORK(&ptp->work, efx_ptp_worker);
ptp->config.flags = 0;
@@ -2009,13 +2020,14 @@ static int efx_phc_enable(struct ptp_clock_info *ptp,
return 0;
}
static const struct efx_channel_type efx_ptp_channel_type = {
const struct efx_channel_type efx_ptp_channel_type = {
.handle_no_channel = efx_ptp_handle_no_channel,
.pre_probe = efx_ptp_probe_channel,
.post_remove = efx_ptp_remove_channel,
.get_name = efx_ptp_get_channel_name,
/* no copy operation; there is no need to reallocate this channel */
.receive_skb = efx_ptp_rx,
.want_txqs = efx_ptp_want_txqs,
.keep_eventq = false,
};