ionic: Only run the doorbell workaround for certain asic_type

If the doorbell workaround isn't required for a certain
asic_type then there is no need to run the associated
code. Since newer FW versions are finally reporting their
asic_type we can use a flag to determine whether or not to
do the workaround.

Signed-off-by: Brett Creeley <brett.creeley@amd.com>
Signed-off-by: Shannon Nelson <shannon.nelson@amd.com>
Link: https://lore.kernel.org/r/20240619003257.6138-9-shannon.nelson@amd.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

drivers/net/ethernet/pensando/ionic/ionic.h

@@ -18,6 +18,8 @@ struct ionic_lif;
 #define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_PF	0x1002
 #define PCI_DEVICE_ID_PENSANDO_IONIC_ETH_VF	0x1003
 
+#define IONIC_ASIC_TYPE_ELBA	2
+
 #define DEVCMD_TIMEOUT			5
 #define IONIC_ADMINQ_TIME_SLICE		msecs_to_jiffies(100)
 
@@ -96,4 +98,6 @@ int ionic_port_identify(struct ionic *ionic);
 int ionic_port_init(struct ionic *ionic);
 int ionic_port_reset(struct ionic *ionic);
 
+bool ionic_doorbell_wa(struct ionic *ionic);
+
 #endif /* _IONIC_H_ */

drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c

@@ -412,7 +412,8 @@ 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);
+		if (ionic->lif->doorbell_wa)
+			cancel_delayed_work_sync(&ionic->doorbell_check_dwork);
 		ionic_lif_unregister(ionic->lif);
 		ionic_devlink_unregister(ionic);
 		ionic_lif_deinit(ionic->lif);

drivers/net/ethernet/pensando/ionic/ionic_dev.c

@@ -128,6 +128,13 @@ static void ionic_doorbell_check_dwork(struct work_struct *work)
 	ionic_queue_doorbell_check(ionic, IONIC_NAPI_DEADLINE);
 }
 
+bool ionic_doorbell_wa(struct ionic *ionic)
+{
+	u8 asic_type = ionic->idev.dev_info.asic_type;
+
+	return !asic_type || asic_type == IONIC_ASIC_TYPE_ELBA;
+}
+
 static int ionic_watchdog_init(struct ionic *ionic)
 {
 	struct ionic_dev *idev = &ionic->idev;
@@ -151,8 +158,10 @@ 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);
+
+	if (ionic_doorbell_wa(ionic))
+		INIT_DELAYED_WORK(&ionic->doorbell_check_dwork,
+				  ionic_doorbell_check_dwork);
 
 	return 0;
 }
@@ -161,6 +170,9 @@ void ionic_queue_doorbell_check(struct ionic *ionic, int delay)
 {
 	int cpu;
 
+	if (!ionic->lif->doorbell_wa)
+		return;
+
 	cpu = ionic_get_preferred_cpu(ionic, &ionic->lif->adminqcq->intr);
 	queue_delayed_work_on(cpu, ionic->wq, &ionic->doorbell_check_dwork,
 			      delay);

drivers/net/ethernet/pensando/ionic/ionic_lif.c

@@ -344,7 +344,8 @@ static int ionic_qcq_disable(struct ionic_lif *lif, struct ionic_qcq *qcq, int f
 	if (qcq->flags & IONIC_QCQ_F_INTR) {
 		struct ionic_dev *idev = &lif->ionic->idev;
 
-		cancel_work_sync(&qcq->doorbell_napi_work);
+		if (lif->doorbell_wa)
+			cancel_work_sync(&qcq->doorbell_napi_work);
 		cancel_work_sync(&qcq->dim.work);
 		ionic_intr_mask(idev->intr_ctrl, qcq->intr.index,
 				IONIC_INTR_MASK_SET);
@@ -691,7 +692,8 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 
 	INIT_WORK(&new->dim.work, ionic_dim_work);
 	new->dim.mode = DIM_CQ_PERIOD_MODE_START_FROM_CQE;
-	INIT_WORK(&new->doorbell_napi_work, ionic_doorbell_napi_work);
+	if (lif->doorbell_wa)
+		INIT_WORK(&new->doorbell_napi_work, ionic_doorbell_napi_work);
 
 	*qcq = new;
 
@@ -1215,12 +1217,14 @@ static int ionic_adminq_napi(struct napi_struct *napi, int budget)
 		ionic_intr_credits(idev->intr_ctrl, intr->index, credits, flags);
 	}
 
-	if (!a_work)
-		ionic_adminq_poke_doorbell(&lif->adminqcq->q);
-	if (lif->hwstamp_rxq && !rx_work)
-		ionic_rxq_poke_doorbell(&lif->hwstamp_rxq->q);
-	if (lif->hwstamp_txq && !tx_work)
-		ionic_txq_poke_doorbell(&lif->hwstamp_txq->q);
+	if (lif->doorbell_wa) {
+		if (!a_work)
+			ionic_adminq_poke_doorbell(&lif->adminqcq->q);
+		if (lif->hwstamp_rxq && !rx_work)
+			ionic_rxq_poke_doorbell(&lif->hwstamp_rxq->q);
+		if (lif->hwstamp_txq && !tx_work)
+			ionic_txq_poke_doorbell(&lif->hwstamp_txq->q);
+	}
 
 	return work_done;
 }
@@ -3749,6 +3753,7 @@ int ionic_lif_init(struct ionic_lif *lif)
 		goto err_out_notifyq_deinit;
 
 	lif->rx_copybreak = IONIC_RX_COPYBREAK_DEFAULT;
+	lif->doorbell_wa = ionic_doorbell_wa(lif->ionic);
 
 	set_bit(IONIC_LIF_F_INITED, lif->state);
 

drivers/net/ethernet/pensando/ionic/ionic_lif.h

@@ -211,6 +211,7 @@ struct ionic_lif {
 	u16 rx_copybreak;
 	u16 rx_mode;
 	bool registered;
+	bool doorbell_wa;
 	u16 lif_type;
 	unsigned int link_down_count;
 	unsigned int nmcast;

drivers/net/ethernet/pensando/ionic/ionic_txrx.c

@@ -950,7 +950,7 @@ int ionic_tx_napi(struct napi_struct *napi, int budget)
 				   work_done, flags);
 	}
 
-	if (!work_done)
+	if (!work_done && cq->bound_q->lif->doorbell_wa)
 		ionic_txq_poke_doorbell(&qcq->q);
 
 	return work_done;
@@ -993,7 +993,7 @@ int ionic_rx_napi(struct napi_struct *napi, int budget)
 				   work_done, flags);
 	}
 
-	if (!work_done)
+	if (!work_done && cq->bound_q->lif->doorbell_wa)
 		ionic_rxq_poke_doorbell(&qcq->q);
 
 	return work_done;
@@ -1038,10 +1038,12 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 				   tx_work_done + rx_work_done, flags);
 	}
 
-	if (!rx_work_done)
-		ionic_rxq_poke_doorbell(&rxqcq->q);
-	if (!tx_work_done)
-		ionic_txq_poke_doorbell(&txqcq->q);
+	if (lif->doorbell_wa) {
+		if (!rx_work_done)
+			ionic_rxq_poke_doorbell(&rxqcq->q);
+		if (!tx_work_done)
+			ionic_txq_poke_doorbell(&txqcq->q);
+	}
 
 	return rx_work_done;
 }