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Message-ID: <20240619003257.6138-5-shannon.nelson@amd.com>
Date: Tue, 18 Jun 2024 17:32:53 -0700
From: Shannon Nelson <shannon.nelson@....com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>, <kuba@...nel.org>,
<edumazet@...gle.com>, <pabeni@...hat.com>, <David.Laight@...LAB.COM>,
<andrew@...n.ch>
CC: <brett.creeley@....com>, <drivers@...sando.io>, Shannon Nelson
<shannon.nelson@....com>
Subject: [PATCH v2 net-next 4/8] ionic: add work item for missed-doorbell check
Add the first queued work for checking on the missed doorbell.
This is a delayed work item that reschedules itself every cycle
starting at probe.
Signed-off-by: Shannon Nelson <shannon.nelson@....com>
---
drivers/net/ethernet/pensando/ionic/ionic.h | 1 +
.../ethernet/pensando/ionic/ionic_bus_pci.c | 2 +
.../net/ethernet/pensando/ionic/ionic_dev.c | 66 +++++++++++++++++++
.../net/ethernet/pensando/ionic/ionic_dev.h | 3 +-
.../net/ethernet/pensando/ionic/ionic_lif.c | 2 +
5 files changed, 73 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic.h b/drivers/net/ethernet/pensando/ionic/ionic.h
index df29c977a702..106ee5b2ceff 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic.h
@@ -56,6 +56,7 @@ struct ionic {
unsigned int nintrs;
DECLARE_BITMAP(intrs, IONIC_INTR_CTRL_REGS_MAX);
cpumask_var_t *affinity_masks;
+ struct delayed_work doorbell_check_dwork;
struct work_struct nb_work;
struct notifier_block nb;
struct rw_semaphore vf_op_lock; /* lock for VF operations */
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index a7146d50f814..f362e76756df 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -377,6 +377,7 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
mod_timer(&ionic->watchdog_timer,
round_jiffies(jiffies + ionic->watchdog_period));
+ ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE);
return 0;
@@ -411,6 +412,7 @@ static void ionic_remove(struct pci_dev *pdev)
if (test_and_clear_bit(IONIC_LIF_F_FW_RESET, ionic->lif->state))
set_bit(IONIC_LIF_F_FW_STOPPING, ionic->lif->state);
+ cancel_delayed_work_sync(&ionic->doorbell_check_dwork);
ionic_lif_unregister(ionic->lif);
ionic_devlink_unregister(ionic);
ionic_lif_deinit(ionic->lif);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 342863fd0b16..5d5990e7376e 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -47,6 +47,61 @@ static void ionic_watchdog_cb(struct timer_list *t)
}
}
+static void ionic_napi_schedule_do_softirq(struct napi_struct *napi)
+{
+ local_bh_disable();
+ napi_schedule(napi);
+ local_bh_enable();
+}
+
+static int ionic_get_preferred_cpu(struct ionic *ionic,
+ struct ionic_intr_info *intr)
+{
+ int cpu;
+
+ cpu = cpumask_first_and(*intr->affinity_mask, cpu_online_mask);
+ if (cpu >= nr_cpu_ids)
+ cpu = cpumask_local_spread(0, dev_to_node(ionic->dev));
+
+ return cpu;
+}
+
+static void ionic_doorbell_check_dwork(struct work_struct *work)
+{
+ struct ionic *ionic = container_of(work, struct ionic,
+ doorbell_check_dwork.work);
+ struct ionic_lif *lif = ionic->lif;
+
+ mutex_lock(&lif->queue_lock);
+
+ if (test_bit(IONIC_LIF_F_FW_STOPPING, lif->state) ||
+ test_bit(IONIC_LIF_F_FW_RESET, lif->state)) {
+ mutex_unlock(&lif->queue_lock);
+ return;
+ }
+
+ ionic_napi_schedule_do_softirq(&lif->adminqcq->napi);
+
+ if (test_bit(IONIC_LIF_F_UP, lif->state)) {
+ int i;
+
+ for (i = 0; i < lif->nxqs; i++) {
+ ionic_napi_schedule_do_softirq(&lif->txqcqs[i]->napi);
+ ionic_napi_schedule_do_softirq(&lif->rxqcqs[i]->napi);
+ }
+
+ if (lif->hwstamp_txq &&
+ lif->hwstamp_txq->flags & IONIC_QCQ_F_INTR)
+ ionic_napi_schedule_do_softirq(&lif->hwstamp_txq->napi);
+ if (lif->hwstamp_rxq &&
+ lif->hwstamp_rxq->flags & IONIC_QCQ_F_INTR)
+ ionic_napi_schedule_do_softirq(&lif->hwstamp_rxq->napi);
+ }
+ mutex_unlock(&lif->queue_lock);
+
+ ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE);
+}
+
static int ionic_watchdog_init(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
@@ -70,10 +125,21 @@ static int ionic_watchdog_init(struct ionic *ionic)
dev_err(ionic->dev, "alloc_workqueue failed");
return -ENOMEM;
}
+ INIT_DELAYED_WORK(&ionic->doorbell_check_dwork,
+ ionic_doorbell_check_dwork);
return 0;
}
+void ionic_queue_doorbell_check(struct ionic *ionic, int delay)
+{
+ int cpu;
+
+ cpu = ionic_get_preferred_cpu(ionic, &ionic->lif->adminqcq->intr);
+ queue_delayed_work_on(cpu, ionic->wq, &ionic->doorbell_check_dwork,
+ delay);
+}
+
void ionic_init_devinfo(struct ionic *ionic)
{
struct ionic_dev *idev = &ionic->idev;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index 7dbd3b8b0e36..d87e6020cfb1 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -28,7 +28,7 @@
#define IONIC_DEV_INFO_REG_COUNT 32
#define IONIC_DEV_CMD_REG_COUNT 32
-#define IONIC_NAPI_DEADLINE (HZ / 200) /* 5ms */
+#define IONIC_NAPI_DEADLINE (HZ) /* 1 sec */
#define IONIC_ADMIN_DOORBELL_DEADLINE (HZ / 2) /* 500ms */
#define IONIC_TX_DOORBELL_DEADLINE (HZ / 100) /* 10ms */
#define IONIC_RX_MIN_DOORBELL_DEADLINE (HZ / 100) /* 10ms */
@@ -386,6 +386,7 @@ bool ionic_q_is_posted(struct ionic_queue *q, unsigned int pos);
int ionic_heartbeat_check(struct ionic *ionic);
bool ionic_is_fw_running(struct ionic_dev *idev);
+void ionic_queue_doorbell_check(struct ionic *ionic, int delay);
bool ionic_adminq_poke_doorbell(struct ionic_queue *q);
bool ionic_txq_poke_doorbell(struct ionic_queue *q);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index cd12107f66d7..42a587d14d01 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1191,6 +1191,7 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget)
if (lif->adminqcq && lif->adminqcq->flags & IONIC_QCQ_F_INITED)
a_work = ionic_cq_service(&lif->adminqcq->cq, budget,
ionic_adminq_service, NULL, NULL);
+
spin_unlock_irqrestore(&lif->adminq_lock, irqflags);
if (lif->hwstamp_rxq)
@@ -3406,6 +3407,7 @@ int ionic_restart_lif(struct ionic_lif *lif)
clear_bit(IONIC_LIF_F_FW_RESET, lif->state);
ionic_link_status_check_request(lif, CAN_SLEEP);
netif_device_attach(lif->netdev);
+ ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE);
return 0;
--
2.17.1
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