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net: stmmac: selftests: Add a test for TBS feature

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Add a new test for TBS feature which is used in ETF scheduler. In this
test, we send a packet with a launch time specified as now + 500ms and
check if the packet was transmitted on that time frame.

Changes from v2:
- Use the TBS bitfield
- Remove debug message

Signed-off-by: Jose Abreu <Jose.Abreu@synopsys.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Jose Abreu 2020-01-13 17:24:16 +01:00 committed by Jakub Kicinski
parent 05373e31ba
commit 28c1cf73c9
1 changed files with 71 additions and 0 deletions
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71
drivers/net/ethernet/stmicro/stmmac/stmmac_selftests.c
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@ -14,6 +14,7 @@
#include <linux/phy.h>
#include <linux/udp.h>
#include <net/pkt_cls.h>
#include <net/pkt_sched.h>
#include <net/tcp.h>
#include <net/udp.h>
#include <net/tc_act/tc_gact.h>
@ -50,6 +51,7 @@ struct stmmac_packet_attrs {
u8 id;
int sarc;
u16 queue_mapping;
u64 timestamp;
};
static u8 stmmac_test_next_id;
@ -208,6 +210,9 @@ static struct sk_buff *stmmac_test_get_udp_skb(struct stmmac_priv *priv,
skb->pkt_type = PACKET_HOST;
skb->dev = priv->dev;
if (attr->timestamp)
skb->tstamp = ns_to_ktime(attr->timestamp);
return skb;
}
@ -1723,6 +1728,68 @@ static int stmmac_test_sph(struct stmmac_priv *priv)
return 0;
}
static int stmmac_test_tbs(struct stmmac_priv *priv)
{
#define STMMAC_TBS_LT_OFFSET (500 * 1000 * 1000) /* 500 ms*/
struct stmmac_packet_attrs attr = { };
struct tc_etf_qopt_offload qopt;
u64 start_time, curr_time = 0;
unsigned long flags;
int ret, i;
if (!priv->hwts_tx_en)
return -EOPNOTSUPP;
/* Find first TBS enabled Queue, if any */
for (i = 0; i < priv->plat->tx_queues_to_use; i++)
if (priv->tx_queue[i].tbs & STMMAC_TBS_AVAIL)
break;
if (i >= priv->plat->tx_queues_to_use)
return -EOPNOTSUPP;
qopt.enable = true;
qopt.queue = i;
ret = stmmac_tc_setup_etf(priv, priv, &qopt);
if (ret)
return ret;
spin_lock_irqsave(&priv->ptp_lock, flags);
stmmac_get_systime(priv, priv->ptpaddr, &curr_time);
spin_unlock_irqrestore(&priv->ptp_lock, flags);
if (!curr_time) {
ret = -EOPNOTSUPP;
goto fail_disable;
}
start_time = curr_time;
curr_time += STMMAC_TBS_LT_OFFSET;
attr.dst = priv->dev->dev_addr;
attr.timestamp = curr_time;
attr.timeout = nsecs_to_jiffies(2 * STMMAC_TBS_LT_OFFSET);
attr.queue_mapping = i;
ret = __stmmac_test_loopback(priv, &attr);
if (ret)
goto fail_disable;
/* Check if expected time has elapsed */
spin_lock_irqsave(&priv->ptp_lock, flags);
stmmac_get_systime(priv, priv->ptpaddr, &curr_time);
spin_unlock_irqrestore(&priv->ptp_lock, flags);
if ((curr_time - start_time) < STMMAC_TBS_LT_OFFSET)
ret = -EINVAL;
fail_disable:
qopt.enable = false;
stmmac_tc_setup_etf(priv, priv, &qopt);
return ret;
}
#define STMMAC_LOOPBACK_NONE 0
#define STMMAC_LOOPBACK_MAC 1
#define STMMAC_LOOPBACK_PHY 2
@ -1856,6 +1923,10 @@ static const struct stmmac_test {
.name = "Split Header ",
.lb = STMMAC_LOOPBACK_PHY,
.fn = stmmac_test_sph,
}, {
.name = "TBS (ETF Scheduler) ",
.lb = STMMAC_LOOPBACK_PHY,
.fn = stmmac_test_tbs,
},
};