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Message-Id: <20240621183947.4105278-6-allen.lkml@gmail.com>
Date: Fri, 21 Jun 2024 11:39:37 -0700
From: Allen Pais <allen.lkml@...il.com>
To: netdev@...r.kernel.org
Cc: Allen Pais <allen.lkml@...il.com>
Subject: [PATCH 05/15] net: cavium/liquidio: Convert tasklet API to new bottom half workqueue mechanism
Migrate tasklet APIs to the new bottom half workqueue mechanism. It
replaces all occurrences of tasklet usage with the appropriate workqueue
APIs throughout the cavium/liquidio driver. This transition ensures
compatibility with the latest design and enhances performance.
Signed-off-by: Allen Pais <allen.lkml@...il.com>
---
.../net/ethernet/cavium/liquidio/lio_core.c | 4 ++--
.../net/ethernet/cavium/liquidio/lio_main.c | 24 +++++++++----------
.../ethernet/cavium/liquidio/lio_vf_main.c | 10 ++++----
.../ethernet/cavium/liquidio/octeon_droq.c | 4 ++--
.../ethernet/cavium/liquidio/octeon_main.h | 4 ++--
5 files changed, 23 insertions(+), 23 deletions(-)
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_core.c b/drivers/net/ethernet/cavium/liquidio/lio_core.c
index 674c54831875..37307e02a6ff 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_core.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_core.c
@@ -925,7 +925,7 @@ int liquidio_schedule_msix_droq_pkt_handler(struct octeon_droq *droq, u64 ret)
if (OCTEON_CN23XX_VF(oct))
dev_err(&oct->pci_dev->dev,
"should not come here should not get rx when poll mode = 0 for vf\n");
- tasklet_schedule(&oct_priv->droq_tasklet);
+ queue_work(system_bh_wq, &oct_priv->droq_bh_work);
return 1;
}
/* this will be flushed periodically by check iq db */
@@ -975,7 +975,7 @@ static void liquidio_schedule_droq_pkt_handlers(struct octeon_device *oct)
droq->ops.napi_fn(droq);
oct_priv->napi_mask |= BIT_ULL(oq_no);
} else {
- tasklet_schedule(&oct_priv->droq_tasklet);
+ queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
}
}
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_main.c b/drivers/net/ethernet/cavium/liquidio/lio_main.c
index 1d79f6eaa41f..d348656c2f38 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_main.c
@@ -150,12 +150,12 @@ static int liquidio_set_vf_link_state(struct net_device *netdev, int vfidx,
static struct handshake handshake[MAX_OCTEON_DEVICES];
static struct completion first_stage;
-static void octeon_droq_bh(struct tasklet_struct *t)
+static void octeon_droq_bh(struct work_struct *work)
{
int q_no;
int reschedule = 0;
- struct octeon_device_priv *oct_priv = from_tasklet(oct_priv, t,
- droq_tasklet);
+ struct octeon_device_priv *oct_priv = from_work(oct_priv, work,
+ droq_bh_work);
struct octeon_device *oct = oct_priv->dev;
for (q_no = 0; q_no < MAX_OCTEON_OUTPUT_QUEUES(oct); q_no++) {
@@ -180,7 +180,7 @@ static void octeon_droq_bh(struct tasklet_struct *t)
}
if (reschedule)
- tasklet_schedule(&oct_priv->droq_tasklet);
+ queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
static int lio_wait_for_oq_pkts(struct octeon_device *oct)
@@ -199,7 +199,7 @@ static int lio_wait_for_oq_pkts(struct octeon_device *oct)
}
if (pkt_cnt > 0) {
pending_pkts += pkt_cnt;
- tasklet_schedule(&oct_priv->droq_tasklet);
+ queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
pkt_cnt = 0;
schedule_timeout_uninterruptible(1);
@@ -1130,7 +1130,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
break;
} /* end switch (oct->status) */
- tasklet_kill(&oct_priv->droq_tasklet);
+ cancel_work_sync(&oct_priv->droq_bh_work);
}
/**
@@ -1234,7 +1234,7 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
netif_napi_del(napi);
- tasklet_enable(&oct_priv->droq_tasklet);
+ enable_and_queue_work(system_bh_wq, &oct_priv->droq_bh_work);
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
@@ -1770,7 +1770,7 @@ static int liquidio_open(struct net_device *netdev)
int ret = 0;
if (oct->props[lio->ifidx].napi_enabled == 0) {
- tasklet_disable(&oct_priv->droq_tasklet);
+ disable_work_sync(&oct_priv->droq_bh_work);
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_enable(napi);
@@ -1896,7 +1896,7 @@ static int liquidio_stop(struct net_device *netdev)
if (OCTEON_CN23XX_PF(oct))
oct->droq[0]->ops.poll_mode = 0;
- tasklet_enable(&oct_priv->droq_tasklet);
+ enable_and_queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
dev_info(&oct->pci_dev->dev, "%s interface is stopped\n", netdev->name);
@@ -4204,9 +4204,9 @@ static int octeon_device_init(struct octeon_device *octeon_dev)
}
}
- /* Initialize the tasklet that handles output queue packet processing.*/
- dev_dbg(&octeon_dev->pci_dev->dev, "Initializing droq tasklet\n");
- tasklet_setup(&oct_priv->droq_tasklet, octeon_droq_bh);
+ /* Initialize the bh work that handles output queue packet processing.*/
+ dev_dbg(&octeon_dev->pci_dev->dev, "Initializing droq bh work\n");
+ INIT_WORK(&oct_priv->droq_bh_work, octeon_droq_bh);
/* Setup the interrupt handler and record the INT SUM register address
*/
diff --git a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
index 62c2eadc33e3..04117625f388 100644
--- a/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
+++ b/drivers/net/ethernet/cavium/liquidio/lio_vf_main.c
@@ -87,7 +87,7 @@ static int lio_wait_for_oq_pkts(struct octeon_device *oct)
}
if (pkt_cnt > 0) {
pending_pkts += pkt_cnt;
- tasklet_schedule(&oct_priv->droq_tasklet);
+ queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
pkt_cnt = 0;
schedule_timeout_uninterruptible(1);
@@ -584,7 +584,7 @@ static void octeon_destroy_resources(struct octeon_device *oct)
break;
}
- tasklet_kill(&oct_priv->droq_tasklet);
+ cancel_work_sync(&oct_priv->droq_bh_work);
}
/**
@@ -687,7 +687,7 @@ static void liquidio_destroy_nic_device(struct octeon_device *oct, int ifidx)
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
netif_napi_del(napi);
- tasklet_enable(&oct_priv->droq_tasklet);
+ enable_and_queue_work(system_bh_wq, &oct_priv->droq_bh_work);
if (atomic_read(&lio->ifstate) & LIO_IFSTATE_REGISTERED)
unregister_netdev(netdev);
@@ -911,7 +911,7 @@ static int liquidio_open(struct net_device *netdev)
int ret = 0;
if (!oct->props[lio->ifidx].napi_enabled) {
- tasklet_disable(&oct_priv->droq_tasklet);
+ disable_work_sync(&oct_priv->droq_bh_work);
list_for_each_entry_safe(napi, n, &netdev->napi_list, dev_list)
napi_enable(napi);
@@ -986,7 +986,7 @@ static int liquidio_stop(struct net_device *netdev)
oct->droq[0]->ops.poll_mode = 0;
- tasklet_enable(&oct_priv->droq_tasklet);
+ enable_and_queue_work(system_bh_wq, &oct_priv->droq_bh_work);
}
cancel_delayed_work_sync(&lio->stats_wk.work);
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
index eef12fdd246d..4e5f8bbc891b 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_droq.c
@@ -96,7 +96,7 @@ u32 octeon_droq_check_hw_for_pkts(struct octeon_droq *droq)
last_count = pkt_count - droq->pkt_count;
droq->pkt_count = pkt_count;
- /* we shall write to cnts at napi irq enable or end of droq tasklet */
+ /* we shall write to cnts at napi irq enable or end of droq bh_work */
if (last_count)
atomic_add(last_count, &droq->pkts_pending);
@@ -764,7 +764,7 @@ octeon_droq_process_packets(struct octeon_device *oct,
(u16)rdisp->rinfo->recv_pkt->rh.r.subcode));
}
- /* If there are packets pending. schedule tasklet again */
+ /* If there are packets pending. schedule bh_work again */
if (atomic_read(&droq->pkts_pending))
return 1;
diff --git a/drivers/net/ethernet/cavium/liquidio/octeon_main.h b/drivers/net/ethernet/cavium/liquidio/octeon_main.h
index 5b4cb725f60f..a8f2a0a7b08e 100644
--- a/drivers/net/ethernet/cavium/liquidio/octeon_main.h
+++ b/drivers/net/ethernet/cavium/liquidio/octeon_main.h
@@ -24,6 +24,7 @@
#define _OCTEON_MAIN_H_
#include <linux/sched/signal.h>
+#include <linux/workqueue.h>
#if BITS_PER_LONG == 32
#define CVM_CAST64(v) ((long long)(v))
@@ -36,8 +37,7 @@
#define DRV_NAME "LiquidIO"
struct octeon_device_priv {
- /** Tasklet structures for this device. */
- struct tasklet_struct droq_tasklet;
+ struct work_struct droq_bh_work;
unsigned long napi_mask;
struct octeon_device *dev;
};
--
2.34.1
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