aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/net
diff options
context:
space:
mode:
authorBert Kenward <bkenward@solarflare.com>2018-01-25 17:24:20 +0000
committerDavid S. Miller <davem@davemloft.net>2018-01-25 16:05:13 -0500
commit5227ecccea2d645d253d243ad287169335a4ae64 (patch)
treebd8a3e1833aa56bdc5b6252ac60dee25d2cda079 /drivers/net
parentnet: Move net:netns_ids destruction out of rtnl_lock() and document locking scheme (diff)
downloadlinux-dev-5227ecccea2d645d253d243ad287169335a4ae64.tar.xz
linux-dev-5227ecccea2d645d253d243ad287169335a4ae64.zip
sfc: remove tx and MCDI handling from NAPI budget consideration
The NAPI budget is only for RX processing work, not other work such as TX or MCDI completion handling. Signed-off-by: Bert Kenward <bkenward@solarflare.com> Signed-off-by: Edward Cree <ecree@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net')
-rw-r--r--drivers/net/ethernet/sfc/ef10.c20
-rw-r--r--drivers/net/ethernet/sfc/farch.c17
2 files changed, 7 insertions, 30 deletions
diff --git a/drivers/net/ethernet/sfc/ef10.c b/drivers/net/ethernet/sfc/ef10.c
index 8ae467db9162..03ec2cc1eab4 100644
--- a/drivers/net/ethernet/sfc/ef10.c
+++ b/drivers/net/ethernet/sfc/ef10.c
@@ -3572,31 +3572,26 @@ static int efx_ef10_handle_rx_event(struct efx_channel *channel,
return n_packets;
}
-static int
+static void
efx_ef10_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
{
struct efx_nic *efx = channel->efx;
struct efx_tx_queue *tx_queue;
unsigned int tx_ev_desc_ptr;
unsigned int tx_ev_q_label;
- int tx_descs = 0;
if (unlikely(READ_ONCE(efx->reset_pending)))
- return 0;
+ return;
if (unlikely(EFX_QWORD_FIELD(*event, ESF_DZ_TX_DROP_EVENT)))
- return 0;
+ return;
/* Transmit completion */
tx_ev_desc_ptr = EFX_QWORD_FIELD(*event, ESF_DZ_TX_DESCR_INDX);
tx_ev_q_label = EFX_QWORD_FIELD(*event, ESF_DZ_TX_QLABEL);
tx_queue = efx_channel_get_tx_queue(channel,
tx_ev_q_label % EFX_TXQ_TYPES);
- tx_descs = ((tx_ev_desc_ptr + 1 - tx_queue->read_count) &
- tx_queue->ptr_mask);
efx_xmit_done(tx_queue, tx_ev_desc_ptr & tx_queue->ptr_mask);
-
- return tx_descs;
}
static void
@@ -3658,7 +3653,6 @@ static int efx_ef10_ev_process(struct efx_channel *channel, int quota)
efx_qword_t event, *p_event;
unsigned int read_ptr;
int ev_code;
- int tx_descs = 0;
int spent = 0;
if (quota <= 0)
@@ -3698,13 +3692,7 @@ static int efx_ef10_ev_process(struct efx_channel *channel, int quota)
}
break;
case ESE_DZ_EV_CODE_TX_EV:
- tx_descs += efx_ef10_handle_tx_event(channel, &event);
- if (tx_descs > efx->txq_entries) {
- spent = quota;
- goto out;
- } else if (++spent == quota) {
- goto out;
- }
+ efx_ef10_handle_tx_event(channel, &event);
break;
case ESE_DZ_EV_CODE_DRIVER_EV:
efx_ef10_handle_driver_event(channel, &event);
diff --git a/drivers/net/ethernet/sfc/farch.c b/drivers/net/ethernet/sfc/farch.c
index 5334dc83d926..ca79ac6d0ac3 100644
--- a/drivers/net/ethernet/sfc/farch.c
+++ b/drivers/net/ethernet/sfc/farch.c
@@ -818,17 +818,16 @@ static void efx_farch_magic_event(struct efx_channel *channel, u32 magic)
* The NIC batches TX completion events; the message we receive is of
* the form "complete all TX events up to this index".
*/
-static int
+static void
efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
{
unsigned int tx_ev_desc_ptr;
unsigned int tx_ev_q_label;
struct efx_tx_queue *tx_queue;
struct efx_nic *efx = channel->efx;
- int tx_packets = 0;
if (unlikely(READ_ONCE(efx->reset_pending)))
- return 0;
+ return;
if (likely(EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_COMP))) {
/* Transmit completion */
@@ -836,8 +835,6 @@ efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
tx_ev_q_label = EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_Q_LABEL);
tx_queue = efx_channel_get_tx_queue(
channel, tx_ev_q_label % EFX_TXQ_TYPES);
- tx_packets = ((tx_ev_desc_ptr - tx_queue->read_count) &
- tx_queue->ptr_mask);
efx_xmit_done(tx_queue, tx_ev_desc_ptr);
} else if (EFX_QWORD_FIELD(*event, FSF_AZ_TX_EV_WQ_FF_FULL)) {
/* Rewrite the FIFO write pointer */
@@ -856,8 +853,6 @@ efx_farch_handle_tx_event(struct efx_channel *channel, efx_qword_t *event)
EFX_QWORD_FMT"\n", channel->channel,
EFX_QWORD_VAL(*event));
}
-
- return tx_packets;
}
/* Detect errors included in the rx_evt_pkt_ok bit. */
@@ -1270,7 +1265,6 @@ int efx_farch_ev_process(struct efx_channel *channel, int budget)
unsigned int read_ptr;
efx_qword_t event, *p_event;
int ev_code;
- int tx_packets = 0;
int spent = 0;
if (budget <= 0)
@@ -1304,12 +1298,7 @@ int efx_farch_ev_process(struct efx_channel *channel, int budget)
goto out;
break;
case FSE_AZ_EV_CODE_TX_EV:
- tx_packets += efx_farch_handle_tx_event(channel,
- &event);
- if (tx_packets > efx->txq_entries) {
- spent = budget;
- goto out;
- }
+ efx_farch_handle_tx_event(channel, &event);
break;
case FSE_AZ_EV_CODE_DRV_GEN_EV:
efx_farch_handle_generated_event(channel, &event);