From: Julian Wiedmann <jwi@linux.ibm.com>
Subject: s390/qeth: skip QDIO queue handler indirection
Patch-mainline: v4.18-rc1
Git-commit: 7bcd64eb8cb56dc2a3b56c0b8f55c8cd908c1c14
References: FATE#326350, LTC#169511, bsc#1113509
Summary: qeth: performance improvements
Description: This adds recent functional and performance improvements for the
qeth network driver.
Primarily this brings Scatter-Gather support for HiperSockets,
reduced CPU consumption in the L3 IPv4 transmit path for OSA,
improved Promiscuous Mode performance due to IFF_UNICAST_FLT,
support for Scatter-Gather on z/VM virtual NICs, and
support for delayed GRO flushing.
For sanity & stability reasons, this effectively constitutes a
backport of the qeth device driver from 4.19 mainline.
Upstream-Description:
s390/qeth: skip QDIO queue handler indirection
Both qeth sub drivers use the same QDIO queue handlers, there's no need
to expose them via the driver's discipline. No functional change.
Signed-off-by: Julian Wiedmann <jwi@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Julian Wiedmann <jwi@linux.ibm.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/s390/net/qeth_core.h | 9 ---------
drivers/s390/net/qeth_core_main.c | 29 +++++++++++++----------------
drivers/s390/net/qeth_l2_main.c | 3 ---
drivers/s390/net/qeth_l3_main.c | 3 ---
4 files changed, 13 insertions(+), 31 deletions(-)
--- a/drivers/s390/net/qeth_core.h
+++ b/drivers/s390/net/qeth_core.h
@@ -710,9 +710,6 @@ enum qeth_discipline_id {
struct qeth_discipline {
const struct device_type *devtype;
- void (*start_poll)(struct ccw_device *, int, unsigned long);
- qdio_handler_t *input_handler;
- qdio_handler_t *output_handler;
int (*process_rx_buffer)(struct qeth_card *card, int budget, int *done);
int (*recover)(void *ptr);
int (*setup) (struct ccwgroup_device *);
@@ -930,13 +927,7 @@ struct sk_buff *qeth_core_get_next_skb(s
struct qeth_qdio_buffer *, struct qdio_buffer_element **, int *,
struct qeth_hdr **);
void qeth_schedule_recovery(struct qeth_card *);
-void qeth_qdio_start_poll(struct ccw_device *, int, unsigned long);
int qeth_poll(struct napi_struct *napi, int budget);
-void qeth_qdio_input_handler(struct ccw_device *,
- unsigned int, unsigned int, int,
- int, unsigned long);
-void qeth_qdio_output_handler(struct ccw_device *, unsigned int,
- int, int, int, unsigned long);
void qeth_clear_ipacmd_list(struct qeth_card *);
int qeth_qdio_clear_card(struct qeth_card *, int);
void qeth_clear_working_pool_list(struct qeth_card *);
--- a/drivers/s390/net/qeth_core_main.c
+++ b/drivers/s390/net/qeth_core_main.c
@@ -3595,15 +3595,14 @@ static void qeth_check_outbound_queue(st
}
}
-void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
- unsigned long card_ptr)
+static void qeth_qdio_start_poll(struct ccw_device *ccwdev, int queue,
+ unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *)card_ptr;
if (card->dev && (card->dev->flags & IFF_UP))
napi_schedule(&card->napi);
}
-EXPORT_SYMBOL_GPL(qeth_qdio_start_poll);
int qeth_configure_cq(struct qeth_card *card, enum qeth_cq cq)
{
@@ -3705,9 +3704,10 @@ out:
return;
}
-void qeth_qdio_input_handler(struct ccw_device *ccwdev, unsigned int qdio_err,
- unsigned int queue, int first_elem, int count,
- unsigned long card_ptr)
+static void qeth_qdio_input_handler(struct ccw_device *ccwdev,
+ unsigned int qdio_err, int queue,
+ int first_elem, int count,
+ unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *)card_ptr;
@@ -3718,14 +3718,12 @@ void qeth_qdio_input_handler(struct ccw_
qeth_qdio_cq_handler(card, qdio_err, queue, first_elem, count);
else if (qdio_err)
qeth_schedule_recovery(card);
-
-
}
-EXPORT_SYMBOL_GPL(qeth_qdio_input_handler);
-void qeth_qdio_output_handler(struct ccw_device *ccwdev,
- unsigned int qdio_error, int __queue, int first_element,
- int count, unsigned long card_ptr)
+static void qeth_qdio_output_handler(struct ccw_device *ccwdev,
+ unsigned int qdio_error, int __queue,
+ int first_element, int count,
+ unsigned long card_ptr)
{
struct qeth_card *card = (struct qeth_card *) card_ptr;
struct qeth_qdio_out_q *queue = card->qdio.out_qs[__queue];
@@ -3798,7 +3796,6 @@ void qeth_qdio_output_handler(struct ccw
card->perf_stats.outbound_handler_time += qeth_get_micros() -
card->perf_stats.outbound_handler_start_time;
}
-EXPORT_SYMBOL_GPL(qeth_qdio_output_handler);
/* We cannot use outbound queue 3 for unicast packets on HiperSockets */
static inline int qeth_cut_iqd_prio(struct qeth_card *card, int queue_num)
@@ -5006,7 +5003,7 @@ static int qeth_qdio_establish(struct qe
goto out_free_in_sbals;
}
for (i = 0; i < card->qdio.no_in_queues; ++i)
- queue_start_poll[i] = card->discipline->start_poll;
+ queue_start_poll[i] = qeth_qdio_start_poll;
qeth_qdio_establish_cq(card, in_sbal_ptrs, queue_start_poll);
@@ -5030,8 +5027,8 @@ static int qeth_qdio_establish(struct qe
init_data.qib_param_field = qib_param_field;
init_data.no_input_qs = card->qdio.no_in_queues;
init_data.no_output_qs = card->qdio.no_out_queues;
- init_data.input_handler = card->discipline->input_handler;
- init_data.output_handler = card->discipline->output_handler;
+ init_data.input_handler = qeth_qdio_input_handler;
+ init_data.output_handler = qeth_qdio_output_handler;
init_data.queue_start_poll_array = queue_start_poll;
init_data.int_parm = (unsigned long) card;
init_data.input_sbal_addr_array = (void **) in_sbal_ptrs;
--- a/drivers/s390/net/qeth_l2_main.c
+++ b/drivers/s390/net/qeth_l2_main.c
@@ -1321,9 +1321,6 @@ static int qeth_l2_control_event(struct
struct qeth_discipline qeth_l2_discipline = {
.devtype = &qeth_l2_devtype,
- .start_poll = qeth_qdio_start_poll,
- .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
- .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
.process_rx_buffer = qeth_l2_process_inbound_buffer,
.recover = qeth_l2_recover,
.setup = qeth_l2_probe_device,
--- a/drivers/s390/net/qeth_l3_main.c
+++ b/drivers/s390/net/qeth_l3_main.c
@@ -2967,9 +2967,6 @@ static int qeth_l3_control_event(struct
struct qeth_discipline qeth_l3_discipline = {
.devtype = &qeth_l3_devtype,
- .start_poll = qeth_qdio_start_poll,
- .input_handler = (qdio_handler_t *) qeth_qdio_input_handler,
- .output_handler = (qdio_handler_t *) qeth_qdio_output_handler,
.process_rx_buffer = qeth_l3_process_inbound_buffer,
.recover = qeth_l3_recover,
.setup = qeth_l3_probe_device,