[PATCH 7/9] s390: qeth driver fixes [4/6]
From: Frank Pavlic <[EMAIL PROTECTED]>
- fix kernel crash due to race,
set card->state to SOFTSETUP after
card and card->dev are initialized properly.
- remove CONFIG_QETH_PERF_STATS, use sysfs attribute instead,
as we want to have the ability to turn on/off the
statistics at runtime.
Signed-off-by: Frank Pavlic <[EMAIL PROTECTED]>
---
drivers/s390/net/Kconfig | 9 ---
drivers/s390/net/qeth.h | 10 +--
drivers/s390/net/qeth_eddp.c | 5 +
drivers/s390/net/qeth_main.c | 147
++++++++++++++++++++----------------------
drivers/s390/net/qeth_proc.c | 23 +++----
drivers/s390/net/qeth_sys.c | 42 ++++++++++++
6 files changed, 128 insertions(+), 108 deletions(-)
1068b773a870931ccec7009a320e37f7013b268f
diff --git a/drivers/s390/net/Kconfig b/drivers/s390/net/Kconfig
index 5488547..1a93fa6 100644
--- a/drivers/s390/net/Kconfig
+++ b/drivers/s390/net/Kconfig
@@ -92,15 +92,6 @@ config QETH_VLAN
If CONFIG_QETH is switched on, this option will include IEEE
802.1q VLAN support in the qeth device driver.
-config QETH_PERF_STATS
- bool "Performance statistics in /proc"
- depends on QETH
- help
- When switched on, this option will add a file in the proc-fs
- (/proc/qeth_perf_stats) containing performance statistics. It
- may slightly impact performance, so this is only recommended for
- internal tuning of the device driver.
-
config CCWGROUP
tristate
default (LCS || CTC || QETH)
diff --git a/drivers/s390/net/qeth.h b/drivers/s390/net/qeth.h
index c04ee91..22a7ffb 100644
--- a/drivers/s390/net/qeth.h
+++ b/drivers/s390/net/qeth.h
@@ -176,7 +176,6 @@ extern struct ccwgroup_driver qeth_ccwgr
/**
* card stuff
*/
-#ifdef CONFIG_QETH_PERF_STATS
struct qeth_perf_stats {
unsigned int bufs_rec;
unsigned int bufs_sent;
@@ -211,8 +210,10 @@ struct qeth_perf_stats {
unsigned int large_send_cnt;
unsigned int sg_skbs_sent;
unsigned int sg_frags_sent;
+ /* initial values when measuring starts */
+ unsigned long initial_rx_packets;
+ unsigned long initial_tx_packets;
};
-#endif /* CONFIG_QETH_PERF_STATS */
/* Routing stuff */
struct qeth_routing_info {
@@ -767,6 +768,7 @@ struct qeth_card_options {
int fake_ll;
int layer2;
enum qeth_large_send_types large_send;
+ int performance_stats;
};
/*
@@ -819,9 +821,7 @@ struct qeth_card {
struct list_head cmd_waiter_list;
/* QDIO buffer handling */
struct qeth_qdio_info qdio;
-#ifdef CONFIG_QETH_PERF_STATS
struct qeth_perf_stats perf_stats;
-#endif /* CONFIG_QETH_PERF_STATS */
int use_hard_stop;
int (*orig_hard_header)(struct sk_buff *,struct net_device *,
unsigned short,void *,void *,unsigned);
@@ -1049,13 +1049,11 @@ qeth_get_arphdr_type(int cardtype, int l
}
}
-#ifdef CONFIG_QETH_PERF_STATS
static inline int
qeth_get_micros(void)
{
return (int) (get_clock() >> 12);
}
-#endif
static inline int
qeth_get_qdio_q_format(struct qeth_card *card)
diff --git a/drivers/s390/net/qeth_eddp.c b/drivers/s390/net/qeth_eddp.c
index 8491598..a363721 100644
--- a/drivers/s390/net/qeth_eddp.c
+++ b/drivers/s390/net/qeth_eddp.c
@@ -179,9 +179,8 @@ out_check:
flush_cnt++;
}
} else {
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.skbs_sent_pack++;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.skbs_sent_pack++;
QETH_DBF_TEXT(trace, 6, "fillbfpa");
if (buf->next_element_to_fill >=
QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
diff --git a/drivers/s390/net/qeth_main.c b/drivers/s390/net/qeth_main.c
index 522fb9d..0bc55a3 100644
--- a/drivers/s390/net/qeth_main.c
+++ b/drivers/s390/net/qeth_main.c
@@ -1073,6 +1073,7 @@ qeth_set_intial_options(struct qeth_card
card->options.layer2 = 1;
else
card->options.layer2 = 0;
+ card->options.performance_stats = 1;
}
/**
@@ -2564,9 +2565,8 @@ qeth_process_inbound_buffer(struct qeth_
/* get first element of current buffer */
element = (struct qdio_buffer_element *)&buf->buffer->element[0];
offset = 0;
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.bufs_rec++;
-#endif
+ if (card->options.performance_stats)
+ card->perf_stats.bufs_rec++;
while((skb = qeth_get_next_skb(card, buf->buffer, &element,
&offset, &hdr))) {
skb->dev = card->dev;
@@ -2623,7 +2623,7 @@ qeth_init_input_buffer(struct qeth_card
{
struct qeth_buffer_pool_entry *pool_entry;
int i;
-
+
pool_entry = qeth_get_buffer_pool_entry(card);
/*
* since the buffer is accessed only from the input_tasklet
@@ -2697,17 +2697,18 @@ qeth_queue_input_buffer(struct qeth_card
* 'index') un-requeued -> this buffer is the first buffer that
* will be requeued the next time
*/
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.inbound_do_qdio_cnt++;
- card->perf_stats.inbound_do_qdio_start_time = qeth_get_micros();
-#endif
+ if (card->options.performance_stats) {
+ card->perf_stats.inbound_do_qdio_cnt++;
+ card->perf_stats.inbound_do_qdio_start_time =
+ qeth_get_micros();
+ }
rc = do_QDIO(CARD_DDEV(card),
QDIO_FLAG_SYNC_INPUT | QDIO_FLAG_UNDER_INTERRUPT,
0, queue->next_buf_to_init, count, NULL);
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.inbound_do_qdio_time += qeth_get_micros() -
- card->perf_stats.inbound_do_qdio_start_time;
-#endif
+ if (card->options.performance_stats)
+ card->perf_stats.inbound_do_qdio_time +=
+ qeth_get_micros() -
+ card->perf_stats.inbound_do_qdio_start_time;
if (rc){
PRINT_WARN("qeth_queue_input_buffer's do_QDIO "
"return %i (device %s).\n",
@@ -2743,10 +2744,10 @@ qeth_qdio_input_handler(struct ccw_devic
QETH_DBF_TEXT(trace, 6, "qdinput");
card = (struct qeth_card *) card_ptr;
net_dev = card->dev;
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.inbound_cnt++;
- card->perf_stats.inbound_start_time = qeth_get_micros();
-#endif
+ if (card->options.performance_stats) {
+ card->perf_stats.inbound_cnt++;
+ card->perf_stats.inbound_start_time = qeth_get_micros();
+ }
if (status & QDIO_STATUS_LOOK_FOR_ERROR) {
if (status & QDIO_STATUS_ACTIVATE_CHECK_CONDITION){
QETH_DBF_TEXT(trace, 1,"qdinchk");
@@ -2768,10 +2769,9 @@ qeth_qdio_input_handler(struct ccw_devic
qeth_put_buffer_pool_entry(card, buffer->pool_entry);
qeth_queue_input_buffer(card, index);
}
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.inbound_time += qeth_get_micros() -
- card->perf_stats.inbound_start_time;
-#endif
+ if (card->options.performance_stats)
+ card->perf_stats.inbound_time += qeth_get_micros() -
+ card->perf_stats.inbound_start_time;
}
static inline int
@@ -2861,10 +2861,11 @@ qeth_flush_buffers(struct qeth_qdio_out_
}
queue->card->dev->trans_start = jiffies;
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.outbound_do_qdio_cnt++;
- queue->card->perf_stats.outbound_do_qdio_start_time = qeth_get_micros();
-#endif
+ if (queue->card->options.performance_stats) {
+ queue->card->perf_stats.outbound_do_qdio_cnt++;
+ queue->card->perf_stats.outbound_do_qdio_start_time =
+ qeth_get_micros();
+ }
if (under_int)
rc = do_QDIO(CARD_DDEV(queue->card),
QDIO_FLAG_SYNC_OUTPUT | QDIO_FLAG_UNDER_INTERRUPT,
@@ -2872,10 +2873,10 @@ qeth_flush_buffers(struct qeth_qdio_out_
else
rc = do_QDIO(CARD_DDEV(queue->card), QDIO_FLAG_SYNC_OUTPUT,
queue->queue_no, index, count, NULL);
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.outbound_do_qdio_time += qeth_get_micros() -
- queue->card->perf_stats.outbound_do_qdio_start_time;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.outbound_do_qdio_time +=
+ qeth_get_micros() -
+ queue->card->perf_stats.outbound_do_qdio_start_time;
if (rc){
QETH_DBF_TEXT(trace, 2, "flushbuf");
QETH_DBF_TEXT_(trace, 2, " err%d", rc);
@@ -2887,9 +2888,8 @@ qeth_flush_buffers(struct qeth_qdio_out_
return;
}
atomic_add(count, &queue->used_buffers);
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.bufs_sent += count;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.bufs_sent += count;
}
/*
@@ -2904,9 +2904,8 @@ qeth_switch_to_packing_if_needed(struct
>= QETH_HIGH_WATERMARK_PACK){
/* switch non-PACKING -> PACKING */
QETH_DBF_TEXT(trace, 6, "np->pack");
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.sc_dp_p++;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.sc_dp_p++;
queue->do_pack = 1;
}
}
@@ -2929,9 +2928,8 @@ qeth_switch_to_nonpacking_if_needed(stru
<= QETH_LOW_WATERMARK_PACK) {
/* switch PACKING -> non-PACKING */
QETH_DBF_TEXT(trace, 6, "pack->np");
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.sc_p_dp++;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.sc_p_dp++;
queue->do_pack = 0;
/* flush packing buffers */
buffer = &queue->bufs[queue->next_buf_to_fill];
@@ -2943,7 +2941,7 @@ qeth_switch_to_nonpacking_if_needed(stru
queue->next_buf_to_fill =
(queue->next_buf_to_fill + 1) %
QDIO_MAX_BUFFERS_PER_Q;
- }
+ }
}
}
return flush_count;
@@ -2999,11 +2997,10 @@ qeth_check_outbound_queue(struct qeth_qd
!atomic_read(&queue->set_pci_flags_count))
flush_cnt +=
qeth_flush_buffers_on_no_pci(queue);
-#ifdef CONFIG_QETH_PERF_STATS
- if (q_was_packing)
+ if (queue->card->options.performance_stats &&
+ q_was_packing)
queue->card->perf_stats.bufs_sent_pack +=
flush_cnt;
-#endif
if (flush_cnt)
qeth_flush_buffers(queue, 1, index, flush_cnt);
atomic_set(&queue->state, QETH_OUT_Q_UNLOCKED);
@@ -3033,10 +3030,11 @@ qeth_qdio_output_handler(struct ccw_devi
return;
}
}
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.outbound_handler_cnt++;
- card->perf_stats.outbound_handler_start_time = qeth_get_micros();
-#endif
+ if (card->options.performance_stats) {
+ card->perf_stats.outbound_handler_cnt++;
+ card->perf_stats.outbound_handler_start_time =
+ qeth_get_micros();
+ }
for(i = first_element; i < (first_element + count); ++i){
buffer = &queue->bufs[i % QDIO_MAX_BUFFERS_PER_Q];
/*we only handle the KICK_IT error by doing a recovery */
@@ -3055,10 +3053,9 @@ qeth_qdio_output_handler(struct ccw_devi
qeth_check_outbound_queue(queue);
netif_wake_queue(queue->card->dev);
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.outbound_handler_time += qeth_get_micros() -
- card->perf_stats.outbound_handler_start_time;
-#endif
+ if (card->options.performance_stats)
+ card->perf_stats.outbound_handler_time += qeth_get_micros() -
+ card->perf_stats.outbound_handler_start_time;
}
static void
@@ -3684,10 +3681,10 @@ qeth_hard_start_xmit(struct sk_buff *skb
/* return OK; otherwise ksoftirqd goes to 100% */
return NETDEV_TX_OK;
}
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.outbound_cnt++;
- card->perf_stats.outbound_start_time = qeth_get_micros();
-#endif
+ if (card->options.performance_stats) {
+ card->perf_stats.outbound_cnt++;
+ card->perf_stats.outbound_start_time = qeth_get_micros();
+ }
netif_stop_queue(dev);
if ((rc = qeth_send_packet(card, skb))) {
if (rc == -EBUSY) {
@@ -3701,10 +3698,9 @@ qeth_hard_start_xmit(struct sk_buff *skb
}
}
netif_wake_queue(dev);
-#ifdef CONFIG_QETH_PERF_STATS
- card->perf_stats.outbound_time += qeth_get_micros() -
- card->perf_stats.outbound_start_time;
-#endif
+ if (card->options.performance_stats)
+ card->perf_stats.outbound_time += qeth_get_micros() -
+ card->perf_stats.outbound_start_time;
return rc;
}
@@ -4213,9 +4209,8 @@ qeth_fill_buffer(struct qeth_qdio_out_q
flush_cnt = 1;
} else {
QETH_DBF_TEXT(trace, 6, "fillbfpa");
-#ifdef CONFIG_QETH_PERF_STATS
- queue->card->perf_stats.skbs_sent_pack++;
-#endif
+ if (queue->card->options.performance_stats)
+ queue->card->perf_stats.skbs_sent_pack++;
if (buf->next_element_to_fill >=
QETH_MAX_BUFFER_ELEMENTS(queue->card)) {
/*
@@ -4380,10 +4375,8 @@ out:
qeth_flush_buffers(queue, 0, start_index, flush_count);
}
/* at this point the queue is UNLOCKED again */
-#ifdef CONFIG_QETH_PERF_STATS
- if (do_pack)
+ if (queue->card->options.performance_stats && do_pack)
queue->card->perf_stats.bufs_sent_pack += flush_count;
-#endif /* CONFIG_QETH_PERF_STATS */
return rc;
}
@@ -4420,10 +4413,8 @@ qeth_send_packet(struct qeth_card *card,
enum qeth_large_send_types large_send = QETH_LARGE_SEND_NO;
struct qeth_eddp_context *ctx = NULL;
int tx_bytes = skb->len;
-#ifdef CONFIG_QETH_PERF_STATS
unsigned short nr_frags = skb_shinfo(skb)->nr_frags;
unsigned short tso_size = skb_shinfo(skb)->gso_size;
-#endif
struct sk_buff *new_skb, *new_skb2;
int rc;
@@ -4505,19 +4496,19 @@ qeth_send_packet(struct qeth_card *card,
card->stats.tx_bytes += tx_bytes;
if (new_skb != skb)
dev_kfree_skb_any(skb);
-#ifdef CONFIG_QETH_PERF_STATS
- if (tso_size &&
- !(large_send == QETH_LARGE_SEND_NO)) {
- card->perf_stats.large_send_bytes += tx_bytes;
- card->perf_stats.large_send_cnt++;
- }
- if (nr_frags > 0) {
- card->perf_stats.sg_skbs_sent++;
- /* nr_frags + skb->data */
- card->perf_stats.sg_frags_sent +=
- nr_frags + 1;
+ if (card->options.performance_stats) {
+ if (tso_size &&
+ !(large_send == QETH_LARGE_SEND_NO)) {
+ card->perf_stats.large_send_bytes += tx_bytes;
+ card->perf_stats.large_send_cnt++;
+ }
+ if (nr_frags > 0) {
+ card->perf_stats.sg_skbs_sent++;
+ /* nr_frags + skb->data */
+ card->perf_stats.sg_frags_sent +=
+ nr_frags + 1;
+ }
}
-#endif /* CONFIG_QETH_PERF_STATS */
} else {
card->stats.tx_dropped++;
__qeth_free_new_skb(skb, new_skb);
@@ -7878,12 +7869,12 @@ __qeth_set_online(struct ccwgroup_device
QETH_DBF_TEXT_(setup, 2, "5err%d", rc);
goto out_remove;
}
- card->state = CARD_STATE_SOFTSETUP;
if ((rc = qeth_init_qdio_queues(card))){
QETH_DBF_TEXT_(setup, 2, "6err%d", rc);
goto out_remove;
}
+ card->state = CARD_STATE_SOFTSETUP;
netif_carrier_on(card->dev);
qeth_set_allowed_threads(card, 0xffffffff, 0);
diff --git a/drivers/s390/net/qeth_proc.c b/drivers/s390/net/qeth_proc.c
index 66f2da1..faa768e 100644
--- a/drivers/s390/net/qeth_proc.c
+++ b/drivers/s390/net/qeth_proc.c
@@ -173,7 +173,6 @@ static struct file_operations qeth_procf
#define QETH_PERF_PROCFILE_NAME "qeth_perf"
static struct proc_dir_entry *qeth_perf_procfile;
-#ifdef CONFIG_QETH_PERF_STATS
static int
qeth_perf_procfile_seq_show(struct seq_file *s, void *it)
{
@@ -192,14 +191,21 @@ qeth_perf_procfile_seq_show(struct seq_f
CARD_DDEV_ID(card),
QETH_CARD_IFNAME(card)
);
+ if (!card->options.performance_stats)
+ seq_printf(s, "Performance statistics are deactivated.\n");
seq_printf(s, " Skb's/buffers received : %lu/%u\n"
" Skb's/buffers sent : %lu/%u\n\n",
- card->stats.rx_packets, card->perf_stats.bufs_rec,
- card->stats.tx_packets, card->perf_stats.bufs_sent
+ card->stats.rx_packets -
+ card->perf_stats.initial_rx_packets,
+ card->perf_stats.bufs_rec,
+ card->stats.tx_packets -
+ card->perf_stats.initial_tx_packets,
+ card->perf_stats.bufs_sent
);
seq_printf(s, " Skb's/buffers sent without packing : %lu/%u\n"
" Skb's/buffers sent with packing : %u/%u\n\n",
- card->stats.tx_packets - card->perf_stats.skbs_sent_pack,
+ card->stats.tx_packets - card->perf_stats.initial_tx_packets
+ - card->perf_stats.skbs_sent_pack,
card->perf_stats.bufs_sent - card->perf_stats.bufs_sent_pack,
card->perf_stats.skbs_sent_pack,
card->perf_stats.bufs_sent_pack
@@ -275,11 +281,6 @@ static struct file_operations qeth_perf_
.release = seq_release,
};
-#define qeth_perf_procfile_created qeth_perf_procfile
-#else
-#define qeth_perf_procfile_created 1
-#endif /* CONFIG_QETH_PERF_STATS */
-
int __init
qeth_create_procfs_entries(void)
{
@@ -288,15 +289,13 @@ qeth_create_procfs_entries(void)
if (qeth_procfile)
qeth_procfile->proc_fops = &qeth_procfile_fops;
-#ifdef CONFIG_QETH_PERF_STATS
qeth_perf_procfile = create_proc_entry(QETH_PERF_PROCFILE_NAME,
S_IFREG | 0444, NULL);
if (qeth_perf_procfile)
qeth_perf_procfile->proc_fops = &qeth_perf_procfile_fops;
-#endif /* CONFIG_QETH_PERF_STATS */
if (qeth_procfile &&
- qeth_perf_procfile_created)
+ qeth_perf_procfile)
return 0;
else
return -ENOMEM;
diff --git a/drivers/s390/net/qeth_sys.c b/drivers/s390/net/qeth_sys.c
index c1f3187..5836737 100644
--- a/drivers/s390/net/qeth_sys.c
+++ b/drivers/s390/net/qeth_sys.c
@@ -743,6 +743,47 @@ static DEVICE_ATTR(layer2, 0644, qeth_de
qeth_dev_layer2_store);
static ssize_t
+qeth_dev_performance_stats_show(struct device *dev, struct device_attribute
*attr, char *buf)
+{
+ struct qeth_card *card = dev->driver_data;
+
+ if (!card)
+ return -EINVAL;
+
+ return sprintf(buf, "%i\n", card->options.performance_stats ? 1:0);
+}
+
+static ssize_t
+qeth_dev_performance_stats_store(struct device *dev, struct device_attribute
*attr, const char *buf, size_t count)
+{
+ struct qeth_card *card = dev->driver_data;
+ char *tmp;
+ int i;
+
+ if (!card)
+ return -EINVAL;
+
+ i = simple_strtoul(buf, &tmp, 16);
+ if ((i == 0) || (i == 1)) {
+ if (i == card->options.performance_stats)
+ return count;
+ card->options.performance_stats = i;
+ if (i == 0)
+ memset(&card->perf_stats, 0,
+ sizeof(struct qeth_perf_stats));
+ card->perf_stats.initial_rx_packets = card->stats.rx_packets;
+ card->perf_stats.initial_tx_packets = card->stats.tx_packets;
+ } else {
+ PRINT_WARN("performance_stats: write 0 or 1 to this file!\n");
+ return -EINVAL;
+ }
+ return count;
+}
+
+static DEVICE_ATTR(performance_stats, 0644, qeth_dev_performance_stats_show,
+ qeth_dev_performance_stats_store);
+
+static ssize_t
qeth_dev_large_send_show(struct device *dev, struct device_attribute *attr,
char *buf)
{
struct qeth_card *card = dev->driver_data;
@@ -928,6 +969,7 @@ static struct device_attribute * qeth_de
&dev_attr_canonical_macaddr,
&dev_attr_layer2,
&dev_attr_large_send,
+ &dev_attr_performance_stats,
NULL,
};
--
1.2.4
-
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