From eba8760948ba04a0909e9c40d552d7fbc6bfb7d3 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:19 -0700
Subject: [PATCH 01/12] ionic: set MTU floor at ETH_MIN_MTU

The NIC might tell us its minimum MTU, but let's be sure not
to use something smaller than ETH_MIN_MTU.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 26988ad7ec97..235215c28f29 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -2079,7 +2079,8 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 	lif->identity = lid;
 	lif->lif_type = IONIC_LIF_TYPE_CLASSIC;
 	ionic_lif_identify(ionic, lif->lif_type, lif->identity);
-	lif->netdev->min_mtu = le32_to_cpu(lif->identity->eth.min_frame_size);
+	lif->netdev->min_mtu = max_t(unsigned int, ETH_MIN_MTU,
+				     le32_to_cpu(lif->identity->eth.min_frame_size));
 	lif->netdev->max_mtu =
 		le32_to_cpu(lif->identity->eth.max_frame_size) - ETH_HLEN - VLAN_HLEN;
 

From 9aa1c152eb44c28a7306bbb2597b32d8e1d65a49 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:20 -0700
Subject: [PATCH 02/12] ionic: fix up a couple of debug strings

Fix the queue name displayed.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 235215c28f29..e95e3fa8840a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -433,14 +433,14 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 		err = ionic_intr_alloc(lif, &new->intr);
 		if (err) {
 			netdev_warn(lif->netdev, "no intr for %s: %d\n",
-				    name, err);
+				    new->q.name, err);
 			goto err_out;
 		}
 
 		err = ionic_bus_get_irq(lif->ionic, new->intr.index);
 		if (err < 0) {
 			netdev_warn(lif->netdev, "no vector for %s: %d\n",
-				    name, err);
+				    new->q.name, err);
 			goto err_out_free_intr;
 		}
 		new->intr.vector = err;
@@ -449,7 +449,8 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 
 		err = ionic_request_irq(lif, new);
 		if (err) {
-			netdev_warn(lif->netdev, "irq request failed %d\n", err);
+			netdev_warn(lif->netdev, "irq request failed for %s: %d\n",
+				    new->q.name, err);
 			goto err_out_free_intr;
 		}
 

From ee205626afa3960fb6353fd6c7a51522c5ce7686 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:21 -0700
Subject: [PATCH 03/12] ionic: use kcalloc for new arrays

Use kcalloc for allocating arrays of structures.

Following along after
commit e71642009cbdA ("ionic_lif: Use devm_kcalloc() in ionic_qcq_alloc()")
there are a couple more array allocations that can be converted
to using devm_kcalloc().

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c | 8 ++++----
 1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index e95e3fa8840a..d73beddc30cc 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -522,7 +522,6 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 static int ionic_qcqs_alloc(struct ionic_lif *lif)
 {
 	struct device *dev = lif->ionic->dev;
-	unsigned int q_list_size;
 	unsigned int flags;
 	int err;
 	int i;
@@ -552,9 +551,9 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 		ionic_link_qcq_interrupts(lif->adminqcq, lif->notifyqcq);
 	}
 
-	q_list_size = sizeof(*lif->txqcqs) * lif->nxqs;
 	err = -ENOMEM;
-	lif->txqcqs = devm_kzalloc(dev, q_list_size, GFP_KERNEL);
+	lif->txqcqs = devm_kcalloc(dev, lif->ionic->ntxqs_per_lif,
+				   sizeof(*lif->txqcqs), GFP_KERNEL);
 	if (!lif->txqcqs)
 		goto err_out_free_notifyqcq;
 	for (i = 0; i < lif->nxqs; i++) {
@@ -565,7 +564,8 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 			goto err_out_free_tx_stats;
 	}
 
-	lif->rxqcqs = devm_kzalloc(dev, q_list_size, GFP_KERNEL);
+	lif->rxqcqs = devm_kcalloc(dev, lif->ionic->nrxqs_per_lif,
+				   sizeof(*lif->rxqcqs), GFP_KERNEL);
 	if (!lif->rxqcqs)
 		goto err_out_free_tx_stats;
 	for (i = 0; i < lif->nxqs; i++) {

From 30b87ab4c0b30e0f681cb7dfaab6c642dd17e454 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:22 -0700
Subject: [PATCH 04/12] ionic: remove lif list concept

As we aren't yet supporting multiple lifs, we can remove
complexity by removing the list concept and related code,
to be re-engineered later when actually needed.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic.h   |   4 +-
 .../ethernet/pensando/ionic/ionic_bus_pci.c   |  32 +++--
 .../net/ethernet/pensando/ionic/ionic_dev.c   |   6 +-
 .../ethernet/pensando/ionic/ionic_devlink.c   |   2 +-
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 131 +++++-------------
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  14 +-
 6 files changed, 62 insertions(+), 127 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic.h b/drivers/net/ethernet/pensando/ionic/ionic.h
index f5a910c458ba..f699ed19eb4f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic.h
@@ -42,13 +42,11 @@ struct ionic {
 	struct ionic_dev_bar bars[IONIC_BARS_MAX];
 	unsigned int num_bars;
 	struct ionic_identity ident;
-	struct list_head lifs;
-	struct ionic_lif *master_lif;
+	struct ionic_lif *lif;
 	unsigned int nnqs_per_lif;
 	unsigned int neqs_per_lif;
 	unsigned int ntxqs_per_lif;
 	unsigned int nrxqs_per_lif;
-	DECLARE_BITMAP(lifbits, IONIC_LIFS_MAX);
 	unsigned int nintrs;
 	DECLARE_BITMAP(intrs, IONIC_INTR_CTRL_REGS_MAX);
 	struct work_struct nb_work;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
index 85c686c16741..d1d6fb6669e5 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_bus_pci.c
@@ -294,21 +294,21 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 		goto err_out_port_reset;
 	}
 
-	err = ionic_lifs_size(ionic);
+	err = ionic_lif_size(ionic);
 	if (err) {
-		dev_err(dev, "Cannot size LIFs: %d, aborting\n", err);
+		dev_err(dev, "Cannot size LIF: %d, aborting\n", err);
 		goto err_out_port_reset;
 	}
 
-	err = ionic_lifs_alloc(ionic);
+	err = ionic_lif_alloc(ionic);
 	if (err) {
-		dev_err(dev, "Cannot allocate LIFs: %d, aborting\n", err);
+		dev_err(dev, "Cannot allocate LIF: %d, aborting\n", err);
 		goto err_out_free_irqs;
 	}
 
-	err = ionic_lifs_init(ionic);
+	err = ionic_lif_init(ionic->lif);
 	if (err) {
-		dev_err(dev, "Cannot init LIFs: %d, aborting\n", err);
+		dev_err(dev, "Cannot init LIF: %d, aborting\n", err);
 		goto err_out_free_lifs;
 	}
 
@@ -321,9 +321,9 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 			dev_err(dev, "Cannot enable existing VFs: %d\n", err);
 	}
 
-	err = ionic_lifs_register(ionic);
+	err = ionic_lif_register(ionic->lif);
 	if (err) {
-		dev_err(dev, "Cannot register LIFs: %d, aborting\n", err);
+		dev_err(dev, "Cannot register LIF: %d, aborting\n", err);
 		goto err_out_deinit_lifs;
 	}
 
@@ -336,12 +336,13 @@ static int ionic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return 0;
 
 err_out_deregister_lifs:
-	ionic_lifs_unregister(ionic);
+	ionic_lif_unregister(ionic->lif);
 err_out_deinit_lifs:
 	ionic_vf_dealloc(ionic);
-	ionic_lifs_deinit(ionic);
+	ionic_lif_deinit(ionic->lif);
 err_out_free_lifs:
-	ionic_lifs_free(ionic);
+	ionic_lif_free(ionic->lif);
+	ionic->lif = NULL;
 err_out_free_irqs:
 	ionic_bus_free_irq_vectors(ionic);
 err_out_port_reset:
@@ -377,11 +378,12 @@ static void ionic_remove(struct pci_dev *pdev)
 	if (!ionic)
 		return;
 
-	if (ionic->master_lif) {
+	if (ionic->lif) {
 		ionic_devlink_unregister(ionic);
-		ionic_lifs_unregister(ionic);
-		ionic_lifs_deinit(ionic);
-		ionic_lifs_free(ionic);
+		ionic_lif_unregister(ionic->lif);
+		ionic_lif_deinit(ionic->lif);
+		ionic_lif_free(ionic->lif);
+		ionic->lif = NULL;
 		ionic_bus_free_irq_vectors(ionic);
 	}
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index d83eff0ae0ac..25cf376f3b40 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -21,8 +21,8 @@ static void ionic_watchdog_cb(struct timer_list *t)
 
 	hb = ionic_heartbeat_check(ionic);
 
-	if (hb >= 0 && ionic->master_lif)
-		ionic_link_status_check_request(ionic->master_lif);
+	if (hb >= 0 && ionic->lif)
+		ionic_link_status_check_request(ionic->lif);
 }
 
 void ionic_init_devinfo(struct ionic *ionic)
@@ -126,7 +126,7 @@ int ionic_heartbeat_check(struct ionic *ionic)
 	/* is this a transition? */
 	if (fw_status != idev->last_fw_status &&
 	    idev->last_fw_status != 0xff) {
-		struct ionic_lif *lif = ionic->master_lif;
+		struct ionic_lif *lif = ionic->lif;
 		bool trigger = false;
 
 		if (!fw_status || fw_status == 0xff) {
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
index c4f4fd469fe3..8d9fb2e19cca 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_devlink.c
@@ -85,7 +85,7 @@ int ionic_devlink_register(struct ionic *ionic)
 		dev_err(ionic->dev, "devlink_port_register failed: %d\n", err);
 	else
 		devlink_port_type_eth_set(&ionic->dl_port,
-					  ionic->master_lif->netdev);
+					  ionic->lif->netdev);
 
 	return err;
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index d73beddc30cc..de9da16db3a8 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -2045,7 +2045,7 @@ int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg)
 	return err;
 }
 
-static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index)
+int ionic_lif_alloc(struct ionic *ionic)
 {
 	struct device *dev = ionic->dev;
 	union ionic_lif_identity *lid;
@@ -2056,7 +2056,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 
 	lid = kzalloc(sizeof(*lid), GFP_KERNEL);
 	if (!lid)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
 	netdev = alloc_etherdev_mqs(sizeof(*lif),
 				    ionic->ntxqs_per_lif, ionic->ntxqs_per_lif);
@@ -2070,7 +2070,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 
 	lif = netdev_priv(netdev);
 	lif->netdev = netdev;
-	ionic->master_lif = lif;
+	ionic->lif = lif;
 	netdev->netdev_ops = &ionic_netdev_ops;
 	ionic_ethtool_set_ops(netdev);
 
@@ -2089,7 +2089,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 	lif->nxqs = ionic->ntxqs_per_lif;
 
 	lif->ionic = ionic;
-	lif->index = index;
+	lif->index = 0;
 	lif->ntxq_descs = IONIC_DEF_TXRX_DESC;
 	lif->nrxq_descs = IONIC_DEF_TXRX_DESC;
 	lif->tx_budget = IONIC_TX_BUDGET_DEFAULT;
@@ -2101,7 +2101,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 	lif->tx_coalesce_usecs = lif->rx_coalesce_usecs;
 	lif->tx_coalesce_hw = lif->rx_coalesce_hw;
 
-	snprintf(lif->name, sizeof(lif->name), "lif%u", index);
+	snprintf(lif->name, sizeof(lif->name), "lif%u", lif->index);
 
 	spin_lock_init(&lif->adminq_lock);
 
@@ -2121,7 +2121,8 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 
 	ionic_debugfs_add_lif(lif);
 
-	/* allocate queues */
+	/* allocate control queues and txrx queue arrays */
+	ionic_lif_queue_identify(lif);
 	err = ionic_qcqs_alloc(lif);
 	if (err)
 		goto err_out_free_lif_info;
@@ -2140,9 +2141,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 	}
 	netdev_rss_key_fill(lif->rss_hash_key, IONIC_RSS_HASH_KEY_SIZE);
 
-	list_add_tail(&lif->list, &ionic->lifs);
-
-	return lif;
+	return 0;
 
 err_out_free_qcqs:
 	ionic_qcqs_free(lif);
@@ -2156,27 +2155,7 @@ static struct ionic_lif *ionic_lif_alloc(struct ionic *ionic, unsigned int index
 err_out_free_lid:
 	kfree(lid);
 
-	return ERR_PTR(err);
-}
-
-int ionic_lifs_alloc(struct ionic *ionic)
-{
-	struct ionic_lif *lif;
-
-	INIT_LIST_HEAD(&ionic->lifs);
-
-	/* only build the first lif, others are for later features */
-	set_bit(0, ionic->lifbits);
-
-	lif = ionic_lif_alloc(ionic, 0);
-	if (IS_ERR_OR_NULL(lif)) {
-		clear_bit(0, ionic->lifbits);
-		return -ENOMEM;
-	}
-
-	ionic_lif_queue_identify(lif);
-
-	return 0;
+	return err;
 }
 
 static void ionic_lif_reset(struct ionic_lif *lif)
@@ -2211,7 +2190,7 @@ static void ionic_lif_handle_fw_down(struct ionic_lif *lif)
 		ionic_txrx_deinit(lif);
 		ionic_txrx_free(lif);
 	}
-	ionic_lifs_deinit(ionic);
+	ionic_lif_deinit(lif);
 	ionic_reset(ionic);
 	ionic_qcqs_free(lif);
 
@@ -2234,7 +2213,7 @@ static void ionic_lif_handle_fw_up(struct ionic_lif *lif)
 	if (err)
 		goto err_out;
 
-	err = ionic_lifs_init(ionic);
+	err = ionic_lif_init(lif);
 	if (err)
 		goto err_qcqs_free;
 
@@ -2263,14 +2242,14 @@ static void ionic_lif_handle_fw_up(struct ionic_lif *lif)
 err_txrx_free:
 	ionic_txrx_free(lif);
 err_lifs_deinit:
-	ionic_lifs_deinit(ionic);
+	ionic_lif_deinit(lif);
 err_qcqs_free:
 	ionic_qcqs_free(lif);
 err_out:
 	dev_err(ionic->dev, "FW Up: LIFs restart failed - err %d\n", err);
 }
 
-static void ionic_lif_free(struct ionic_lif *lif)
+void ionic_lif_free(struct ionic_lif *lif)
 {
 	struct device *dev = lif->ionic->dev;
 
@@ -2299,23 +2278,10 @@ static void ionic_lif_free(struct ionic_lif *lif)
 
 	/* free netdev & lif */
 	ionic_debugfs_del_lif(lif);
-	list_del(&lif->list);
 	free_netdev(lif->netdev);
 }
 
-void ionic_lifs_free(struct ionic *ionic)
-{
-	struct list_head *cur, *tmp;
-	struct ionic_lif *lif;
-
-	list_for_each_safe(cur, tmp, &ionic->lifs) {
-		lif = list_entry(cur, struct ionic_lif, list);
-
-		ionic_lif_free(lif);
-	}
-}
-
-static void ionic_lif_deinit(struct ionic_lif *lif)
+void ionic_lif_deinit(struct ionic_lif *lif)
 {
 	if (!test_and_clear_bit(IONIC_LIF_F_INITED, lif->state))
 		return;
@@ -2336,17 +2302,6 @@ static void ionic_lif_deinit(struct ionic_lif *lif)
 	ionic_lif_reset(lif);
 }
 
-void ionic_lifs_deinit(struct ionic *ionic)
-{
-	struct list_head *cur, *tmp;
-	struct ionic_lif *lif;
-
-	list_for_each_safe(cur, tmp, &ionic->lifs) {
-		lif = list_entry(cur, struct ionic_lif, list);
-		ionic_lif_deinit(lif);
-	}
-}
-
 static int ionic_lif_adminq_init(struct ionic_lif *lif)
 {
 	struct device *dev = lif->ionic->dev;
@@ -2492,7 +2447,7 @@ static int ionic_station_set(struct ionic_lif *lif)
 	return 0;
 }
 
-static int ionic_lif_init(struct ionic_lif *lif)
+int ionic_lif_init(struct ionic_lif *lif)
 {
 	struct ionic_dev *idev = &lif->ionic->idev;
 	struct device *dev = lif->ionic->dev;
@@ -2582,22 +2537,6 @@ static int ionic_lif_init(struct ionic_lif *lif)
 	return err;
 }
 
-int ionic_lifs_init(struct ionic *ionic)
-{
-	struct list_head *cur, *tmp;
-	struct ionic_lif *lif;
-	int err;
-
-	list_for_each_safe(cur, tmp, &ionic->lifs) {
-		lif = list_entry(cur, struct ionic_lif, list);
-		err = ionic_lif_init(lif);
-		if (err)
-			return err;
-	}
-
-	return 0;
-}
-
 static void ionic_lif_notify_work(struct work_struct *ws)
 {
 }
@@ -2646,45 +2585,41 @@ static int ionic_lif_notify(struct notifier_block *nb,
 	return NOTIFY_DONE;
 }
 
-int ionic_lifs_register(struct ionic *ionic)
+int ionic_lif_register(struct ionic_lif *lif)
 {
 	int err;
 
-	INIT_WORK(&ionic->nb_work, ionic_lif_notify_work);
+	INIT_WORK(&lif->ionic->nb_work, ionic_lif_notify_work);
 
-	ionic->nb.notifier_call = ionic_lif_notify;
+	lif->ionic->nb.notifier_call = ionic_lif_notify;
 
-	err = register_netdevice_notifier(&ionic->nb);
+	err = register_netdevice_notifier(&lif->ionic->nb);
 	if (err)
-		ionic->nb.notifier_call = NULL;
+		lif->ionic->nb.notifier_call = NULL;
 
 	/* only register LIF0 for now */
-	err = register_netdev(ionic->master_lif->netdev);
+	err = register_netdev(lif->netdev);
 	if (err) {
-		dev_err(ionic->dev, "Cannot register net device, aborting\n");
+		dev_err(lif->ionic->dev, "Cannot register net device, aborting\n");
 		return err;
 	}
-	ionic->master_lif->registered = true;
-	ionic_lif_set_netdev_info(ionic->master_lif);
+	lif->registered = true;
+	ionic_lif_set_netdev_info(lif);
 
 	return 0;
 }
 
-void ionic_lifs_unregister(struct ionic *ionic)
+void ionic_lif_unregister(struct ionic_lif *lif)
 {
-	if (ionic->nb.notifier_call) {
-		unregister_netdevice_notifier(&ionic->nb);
-		cancel_work_sync(&ionic->nb_work);
-		ionic->nb.notifier_call = NULL;
+	if (lif->ionic->nb.notifier_call) {
+		unregister_netdevice_notifier(&lif->ionic->nb);
+		cancel_work_sync(&lif->ionic->nb_work);
+		lif->ionic->nb.notifier_call = NULL;
 	}
 
-	/* There is only one lif ever registered in the
-	 * current model, so don't bother searching the
-	 * ionic->lif for candidates to unregister
-	 */
-	if (ionic->master_lif &&
-	    ionic->master_lif->netdev->reg_state == NETREG_REGISTERED)
-		unregister_netdev(ionic->master_lif->netdev);
+	if (lif->netdev->reg_state == NETREG_REGISTERED)
+		unregister_netdev(lif->netdev);
+	lif->registered = false;
 }
 
 static void ionic_lif_queue_identify(struct ionic_lif *lif)
@@ -2803,7 +2738,7 @@ int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
 	return 0;
 }
 
-int ionic_lifs_size(struct ionic *ionic)
+int ionic_lif_size(struct ionic *ionic)
 {
 	struct ionic_identity *ident = &ionic->ident;
 	unsigned int nintrs, dev_nintrs;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 1ee3b14c8d50..95d85502c18d 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -242,15 +242,15 @@ void ionic_get_stats64(struct net_device *netdev,
 		       struct rtnl_link_stats64 *ns);
 void ionic_lif_deferred_enqueue(struct ionic_deferred *def,
 				struct ionic_deferred_work *work);
-int ionic_lifs_alloc(struct ionic *ionic);
-void ionic_lifs_free(struct ionic *ionic);
-void ionic_lifs_deinit(struct ionic *ionic);
-int ionic_lifs_init(struct ionic *ionic);
-int ionic_lifs_register(struct ionic *ionic);
-void ionic_lifs_unregister(struct ionic *ionic);
+int ionic_lif_alloc(struct ionic *ionic);
+int ionic_lif_init(struct ionic_lif *lif);
+void ionic_lif_free(struct ionic_lif *lif);
+void ionic_lif_deinit(struct ionic_lif *lif);
+int ionic_lif_register(struct ionic_lif *lif);
+void ionic_lif_unregister(struct ionic_lif *lif);
 int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
 		       union ionic_lif_identity *lif_ident);
-int ionic_lifs_size(struct ionic *ionic);
+int ionic_lif_size(struct ionic *ionic);
 int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);
 

From 34dec947b9ceff8a822ece467aac49b0ac992b8e Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:23 -0700
Subject: [PATCH 05/12] ionic: rework and simplify handling of the queue stats
 block

Use a block of stats structs attached to the lif instead of
little ones attached to each qcq.  This simplifies our memory
management and gets rid of a lot of unnecessary indirection.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../ethernet/pensando/ionic/ionic_ethtool.c   |   4 +-
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 135 +++++++-----------
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  42 ++----
 .../net/ethernet/pensando/ionic/ionic_stats.c |  46 +++---
 .../net/ethernet/pensando/ionic/ionic_txrx.c  |  12 +-
 5 files changed, 91 insertions(+), 148 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 3c57c331729f..73af0ecc5495 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -454,7 +454,7 @@ static int ionic_set_coalesce(struct net_device *netdev,
 
 		if (test_bit(IONIC_LIF_F_UP, lif->state)) {
 			for (i = 0; i < lif->nxqs; i++) {
-				qcq = lif->rxqcqs[i].qcq;
+				qcq = lif->rxqcqs[i];
 				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
 						     qcq->intr.index,
 						     lif->rx_coalesce_hw);
@@ -471,7 +471,7 @@ static int ionic_set_coalesce(struct net_device *netdev,
 
 		if (test_bit(IONIC_LIF_F_UP, lif->state)) {
 			for (i = 0; i < lif->nxqs; i++) {
-				qcq = lif->txqcqs[i].qcq;
+				qcq = lif->txqcqs[i];
 				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
 						     qcq->intr.index,
 						     lif->tx_coalesce_hw);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index de9da16db3a8..03eee682f872 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -327,7 +327,6 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 static void ionic_qcqs_free(struct ionic_lif *lif)
 {
 	struct device *dev = lif->ionic->dev;
-	unsigned int i;
 
 	if (lif->notifyqcq) {
 		ionic_qcq_free(lif, lif->notifyqcq);
@@ -340,17 +339,15 @@ static void ionic_qcqs_free(struct ionic_lif *lif)
 	}
 
 	if (lif->rxqcqs) {
-		for (i = 0; i < lif->nxqs; i++)
-			if (lif->rxqcqs[i].stats)
-				devm_kfree(dev, lif->rxqcqs[i].stats);
+		devm_kfree(dev, lif->rxqstats);
+		lif->rxqstats = NULL;
 		devm_kfree(dev, lif->rxqcqs);
 		lif->rxqcqs = NULL;
 	}
 
 	if (lif->txqcqs) {
-		for (i = 0; i < lif->nxqs; i++)
-			if (lif->txqcqs[i].stats)
-				devm_kfree(dev, lif->txqcqs[i].stats);
+		devm_kfree(dev, lif->txqstats);
+		lif->txqstats = NULL;
 		devm_kfree(dev, lif->txqcqs);
 		lif->txqcqs = NULL;
 	}
@@ -524,7 +521,6 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 	struct device *dev = lif->ionic->dev;
 	unsigned int flags;
 	int err;
-	int i;
 
 	flags = IONIC_QCQ_F_INTR;
 	err = ionic_qcq_alloc(lif, IONIC_QTYPE_ADMINQ, 0, "admin", flags,
@@ -544,7 +540,7 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 				      sizeof(union ionic_notifyq_comp),
 				      0, lif->kern_pid, &lif->notifyqcq);
 		if (err)
-			goto err_out_free_adminqcq;
+			goto err_out;
 		ionic_debugfs_add_qcq(lif, lif->notifyqcq);
 
 		/* Let the notifyq ride on the adminq interrupt */
@@ -553,52 +549,27 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 
 	err = -ENOMEM;
 	lif->txqcqs = devm_kcalloc(dev, lif->ionic->ntxqs_per_lif,
-				   sizeof(*lif->txqcqs), GFP_KERNEL);
+				   sizeof(struct ionic_qcq *), GFP_KERNEL);
 	if (!lif->txqcqs)
-		goto err_out_free_notifyqcq;
-	for (i = 0; i < lif->nxqs; i++) {
-		lif->txqcqs[i].stats = devm_kzalloc(dev,
-						    sizeof(struct ionic_q_stats),
-						    GFP_KERNEL);
-		if (!lif->txqcqs[i].stats)
-			goto err_out_free_tx_stats;
-	}
-
+		goto err_out;
 	lif->rxqcqs = devm_kcalloc(dev, lif->ionic->nrxqs_per_lif,
-				   sizeof(*lif->rxqcqs), GFP_KERNEL);
+				   sizeof(struct ionic_qcq *), GFP_KERNEL);
 	if (!lif->rxqcqs)
-		goto err_out_free_tx_stats;
-	for (i = 0; i < lif->nxqs; i++) {
-		lif->rxqcqs[i].stats = devm_kzalloc(dev,
-						    sizeof(struct ionic_q_stats),
-						    GFP_KERNEL);
-		if (!lif->rxqcqs[i].stats)
-			goto err_out_free_rx_stats;
-	}
+		goto err_out;
+
+	lif->txqstats = devm_kcalloc(dev, lif->ionic->ntxqs_per_lif,
+				     sizeof(struct ionic_tx_stats), GFP_KERNEL);
+	if (!lif->txqstats)
+		goto err_out;
+	lif->rxqstats = devm_kcalloc(dev, lif->ionic->nrxqs_per_lif,
+				     sizeof(struct ionic_rx_stats), GFP_KERNEL);
+	if (!lif->rxqstats)
+		goto err_out;
 
 	return 0;
 
-err_out_free_rx_stats:
-	for (i = 0; i < lif->nxqs; i++)
-		if (lif->rxqcqs[i].stats)
-			devm_kfree(dev, lif->rxqcqs[i].stats);
-	devm_kfree(dev, lif->rxqcqs);
-	lif->rxqcqs = NULL;
-err_out_free_tx_stats:
-	for (i = 0; i < lif->nxqs; i++)
-		if (lif->txqcqs[i].stats)
-			devm_kfree(dev, lif->txqcqs[i].stats);
-	devm_kfree(dev, lif->txqcqs);
-	lif->txqcqs = NULL;
-err_out_free_notifyqcq:
-	if (lif->notifyqcq) {
-		ionic_qcq_free(lif, lif->notifyqcq);
-		lif->notifyqcq = NULL;
-	}
-err_out_free_adminqcq:
-	ionic_qcq_free(lif, lif->adminqcq);
-	lif->adminqcq = NULL;
-
+err_out:
+	ionic_qcqs_free(lif);
 	return err;
 }
 
@@ -630,7 +601,7 @@ static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
 		intr_index = qcq->intr.index;
 	else
-		intr_index = lif->rxqcqs[q->index].qcq->intr.index;
+		intr_index = lif->rxqcqs[q->index]->intr.index;
 	ctx.cmd.q_init.intr_index = cpu_to_le16(intr_index);
 
 	dev_dbg(dev, "txq_init.pid %d\n", ctx.cmd.q_init.pid);
@@ -1483,7 +1454,7 @@ static void ionic_txrx_disable(struct ionic_lif *lif)
 
 	if (lif->txqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			err = ionic_qcq_disable(lif->txqcqs[i].qcq);
+			err = ionic_qcq_disable(lif->txqcqs[i]);
 			if (err == -ETIMEDOUT)
 				break;
 		}
@@ -1491,7 +1462,7 @@ static void ionic_txrx_disable(struct ionic_lif *lif)
 
 	if (lif->rxqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			err = ionic_qcq_disable(lif->rxqcqs[i].qcq);
+			err = ionic_qcq_disable(lif->rxqcqs[i]);
 			if (err == -ETIMEDOUT)
 				break;
 		}
@@ -1504,17 +1475,17 @@ static void ionic_txrx_deinit(struct ionic_lif *lif)
 
 	if (lif->txqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			ionic_lif_qcq_deinit(lif, lif->txqcqs[i].qcq);
-			ionic_tx_flush(&lif->txqcqs[i].qcq->cq);
-			ionic_tx_empty(&lif->txqcqs[i].qcq->q);
+			ionic_lif_qcq_deinit(lif, lif->txqcqs[i]);
+			ionic_tx_flush(&lif->txqcqs[i]->cq);
+			ionic_tx_empty(&lif->txqcqs[i]->q);
 		}
 	}
 
 	if (lif->rxqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			ionic_lif_qcq_deinit(lif, lif->rxqcqs[i].qcq);
-			ionic_rx_flush(&lif->rxqcqs[i].qcq->cq);
-			ionic_rx_empty(&lif->rxqcqs[i].qcq->q);
+			ionic_lif_qcq_deinit(lif, lif->rxqcqs[i]);
+			ionic_rx_flush(&lif->rxqcqs[i]->cq);
+			ionic_rx_empty(&lif->rxqcqs[i]->q);
 		}
 	}
 	lif->rx_mode = 0;
@@ -1526,15 +1497,15 @@ static void ionic_txrx_free(struct ionic_lif *lif)
 
 	if (lif->txqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			ionic_qcq_free(lif, lif->txqcqs[i].qcq);
-			lif->txqcqs[i].qcq = NULL;
+			ionic_qcq_free(lif, lif->txqcqs[i]);
+			lif->txqcqs[i] = NULL;
 		}
 	}
 
 	if (lif->rxqcqs) {
 		for (i = 0; i < lif->nxqs; i++) {
-			ionic_qcq_free(lif, lif->rxqcqs[i].qcq);
-			lif->rxqcqs[i].qcq = NULL;
+			ionic_qcq_free(lif, lif->rxqcqs[i]);
+			lif->rxqcqs[i] = NULL;
 		}
 	}
 }
@@ -1562,17 +1533,16 @@ static int ionic_txrx_alloc(struct ionic_lif *lif)
 				      sizeof(struct ionic_txq_desc),
 				      sizeof(struct ionic_txq_comp),
 				      sg_desc_sz,
-				      lif->kern_pid, &lif->txqcqs[i].qcq);
+				      lif->kern_pid, &lif->txqcqs[i]);
 		if (err)
 			goto err_out;
 
 		if (flags & IONIC_QCQ_F_INTR)
 			ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
-					     lif->txqcqs[i].qcq->intr.index,
+					     lif->txqcqs[i]->intr.index,
 					     lif->tx_coalesce_hw);
 
-		lif->txqcqs[i].qcq->stats = lif->txqcqs[i].stats;
-		ionic_debugfs_add_qcq(lif, lif->txqcqs[i].qcq);
+		ionic_debugfs_add_qcq(lif, lif->txqcqs[i]);
 	}
 
 	flags = IONIC_QCQ_F_RX_STATS | IONIC_QCQ_F_SG | IONIC_QCQ_F_INTR;
@@ -1582,20 +1552,19 @@ static int ionic_txrx_alloc(struct ionic_lif *lif)
 				      sizeof(struct ionic_rxq_desc),
 				      sizeof(struct ionic_rxq_comp),
 				      sizeof(struct ionic_rxq_sg_desc),
-				      lif->kern_pid, &lif->rxqcqs[i].qcq);
+				      lif->kern_pid, &lif->rxqcqs[i]);
 		if (err)
 			goto err_out;
 
 		ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
-				     lif->rxqcqs[i].qcq->intr.index,
+				     lif->rxqcqs[i]->intr.index,
 				     lif->rx_coalesce_hw);
 
 		if (!test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
-			ionic_link_qcq_interrupts(lif->rxqcqs[i].qcq,
-						  lif->txqcqs[i].qcq);
+			ionic_link_qcq_interrupts(lif->rxqcqs[i],
+						  lif->txqcqs[i]);
 
-		lif->rxqcqs[i].qcq->stats = lif->rxqcqs[i].stats;
-		ionic_debugfs_add_qcq(lif, lif->rxqcqs[i].qcq);
+		ionic_debugfs_add_qcq(lif, lif->rxqcqs[i]);
 	}
 
 	return 0;
@@ -1612,13 +1581,13 @@ static int ionic_txrx_init(struct ionic_lif *lif)
 	int err;
 
 	for (i = 0; i < lif->nxqs; i++) {
-		err = ionic_lif_txq_init(lif, lif->txqcqs[i].qcq);
+		err = ionic_lif_txq_init(lif, lif->txqcqs[i]);
 		if (err)
 			goto err_out;
 
-		err = ionic_lif_rxq_init(lif, lif->rxqcqs[i].qcq);
+		err = ionic_lif_rxq_init(lif, lif->rxqcqs[i]);
 		if (err) {
-			ionic_lif_qcq_deinit(lif, lif->txqcqs[i].qcq);
+			ionic_lif_qcq_deinit(lif, lif->txqcqs[i]);
 			goto err_out;
 		}
 	}
@@ -1632,8 +1601,8 @@ static int ionic_txrx_init(struct ionic_lif *lif)
 
 err_out:
 	while (i--) {
-		ionic_lif_qcq_deinit(lif, lif->txqcqs[i].qcq);
-		ionic_lif_qcq_deinit(lif, lif->rxqcqs[i].qcq);
+		ionic_lif_qcq_deinit(lif, lif->txqcqs[i]);
+		ionic_lif_qcq_deinit(lif, lif->rxqcqs[i]);
 	}
 
 	return err;
@@ -1644,15 +1613,15 @@ static int ionic_txrx_enable(struct ionic_lif *lif)
 	int i, err;
 
 	for (i = 0; i < lif->nxqs; i++) {
-		ionic_rx_fill(&lif->rxqcqs[i].qcq->q);
-		err = ionic_qcq_enable(lif->rxqcqs[i].qcq);
+		ionic_rx_fill(&lif->rxqcqs[i]->q);
+		err = ionic_qcq_enable(lif->rxqcqs[i]);
 		if (err)
 			goto err_out;
 
-		err = ionic_qcq_enable(lif->txqcqs[i].qcq);
+		err = ionic_qcq_enable(lif->txqcqs[i]);
 		if (err) {
 			if (err != -ETIMEDOUT)
-				ionic_qcq_disable(lif->rxqcqs[i].qcq);
+				ionic_qcq_disable(lif->rxqcqs[i]);
 			goto err_out;
 		}
 	}
@@ -1661,10 +1630,10 @@ static int ionic_txrx_enable(struct ionic_lif *lif)
 
 err_out:
 	while (i--) {
-		err = ionic_qcq_disable(lif->txqcqs[i].qcq);
+		err = ionic_qcq_disable(lif->txqcqs[i]);
 		if (err == -ETIMEDOUT)
 			break;
-		err = ionic_qcq_disable(lif->rxqcqs[i].qcq);
+		err = ionic_qcq_disable(lif->rxqcqs[i]);
 		if (err == -ETIMEDOUT)
 			break;
 	}
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 95d85502c18d..aa1cba74ba9b 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -56,13 +56,6 @@ struct ionic_napi_stats {
 	u64 work_done_cntr[IONIC_MAX_NUM_NAPI_CNTR];
 };
 
-struct ionic_q_stats {
-	union {
-		struct ionic_tx_stats tx;
-		struct ionic_rx_stats rx;
-	};
-};
-
 struct ionic_qcq {
 	void *base;
 	dma_addr_t base_pa;
@@ -72,19 +65,13 @@ struct ionic_qcq {
 	struct ionic_intr_info intr;
 	struct napi_struct napi;
 	struct ionic_napi_stats napi_stats;
-	struct ionic_q_stats *stats;
 	unsigned int flags;
 	struct dentry *dentry;
 };
 
-struct ionic_qcqst {
-	struct ionic_qcq *qcq;
-	struct ionic_q_stats *stats;
-};
-
 #define q_to_qcq(q)		container_of(q, struct ionic_qcq, q)
-#define q_to_tx_stats(q)	(&q_to_qcq(q)->stats->tx)
-#define q_to_rx_stats(q)	(&q_to_qcq(q)->stats->rx)
+#define q_to_tx_stats(q)	(&(q)->lif->txqstats[(q)->index])
+#define q_to_rx_stats(q)	(&(q)->lif->rxqstats[(q)->index])
 #define napi_to_qcq(napi)	container_of(napi, struct ionic_qcq, napi)
 #define napi_to_cq(napi)	(&napi_to_qcq(napi)->cq)
 
@@ -170,8 +157,10 @@ struct ionic_lif {
 	spinlock_t adminq_lock;		/* lock for AdminQ operations */
 	struct ionic_qcq *adminqcq;
 	struct ionic_qcq *notifyqcq;
-	struct ionic_qcqst *txqcqs;
-	struct ionic_qcqst *rxqcqs;
+	struct ionic_qcq **txqcqs;
+	struct ionic_tx_stats *txqstats;
+	struct ionic_qcq **rxqcqs;
+	struct ionic_rx_stats *rxqstats;
 	u64 last_eid;
 	unsigned int neqs;
 	unsigned int nxqs;
@@ -212,13 +201,6 @@ struct ionic_lif {
 	struct work_struct tx_timeout_work;
 };
 
-#define lif_to_txqcq(lif, i)	((lif)->txqcqs[i].qcq)
-#define lif_to_rxqcq(lif, i)	((lif)->rxqcqs[i].qcq)
-#define lif_to_txstats(lif, i)	((lif)->txqcqs[i].stats->tx)
-#define lif_to_rxstats(lif, i)	((lif)->rxqcqs[i].stats->rx)
-#define lif_to_txq(lif, i)	(&lif_to_txqcq((lif), i)->q)
-#define lif_to_rxq(lif, i)	(&lif_to_txqcq((lif), i)->q)
-
 static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs)
 {
 	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
@@ -258,18 +240,18 @@ int ionic_open(struct net_device *netdev);
 int ionic_stop(struct net_device *netdev);
 int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg);
 
-static inline void debug_stats_txq_post(struct ionic_qcq *qcq,
+static inline void debug_stats_txq_post(struct ionic_queue *q,
 					struct ionic_txq_desc *desc, bool dbell)
 {
 	u8 num_sg_elems = ((le64_to_cpu(desc->cmd) >> IONIC_TXQ_DESC_NSGE_SHIFT)
 						& IONIC_TXQ_DESC_NSGE_MASK);
 
-	qcq->q.dbell_count += dbell;
+	q->dbell_count += dbell;
 
 	if (num_sg_elems > (IONIC_MAX_NUM_SG_CNTR - 1))
 		num_sg_elems = IONIC_MAX_NUM_SG_CNTR - 1;
 
-	qcq->stats->tx.sg_cntr[num_sg_elems]++;
+	q->lif->txqstats[q->index].sg_cntr[num_sg_elems]++;
 }
 
 static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
@@ -284,10 +266,10 @@ static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
 }
 
 #define DEBUG_STATS_CQE_CNT(cq)		((cq)->compl_count++)
-#define DEBUG_STATS_RX_BUFF_CNT(qcq)	((qcq)->stats->rx.buffers_posted++)
+#define DEBUG_STATS_RX_BUFF_CNT(q)	((q)->lif->rxqstats[q->index].buffers_posted++)
 #define DEBUG_STATS_INTR_REARM(intr)	((intr)->rearm_count++)
-#define DEBUG_STATS_TXQ_POST(qcq, txdesc, dbell) \
-	debug_stats_txq_post(qcq, txdesc, dbell)
+#define DEBUG_STATS_TXQ_POST(q, txdesc, dbell) \
+	debug_stats_txq_post(q, txdesc, dbell)
 #define DEBUG_STATS_NAPI_POLL(qcq, work_done) \
 	debug_stats_napi_poll(qcq, work_done)
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_stats.c b/drivers/net/ethernet/pensando/ionic/ionic_stats.c
index 2a1885da58a6..ff20a2ac4c2f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_stats.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_stats.c
@@ -179,36 +179,28 @@ static const struct ionic_stat_desc ionic_dbg_napi_stats_desc[] = {
 static void ionic_get_lif_stats(struct ionic_lif *lif,
 				struct ionic_lif_sw_stats *stats)
 {
-	struct ionic_tx_stats *tstats;
-	struct ionic_rx_stats *rstats;
+	struct ionic_tx_stats *txstats;
+	struct ionic_rx_stats *rxstats;
 	struct rtnl_link_stats64 ns;
-	struct ionic_qcq *txqcq;
-	struct ionic_qcq *rxqcq;
 	int q_num;
 
 	memset(stats, 0, sizeof(*stats));
 
 	for (q_num = 0; q_num < MAX_Q(lif); q_num++) {
-		txqcq = lif_to_txqcq(lif, q_num);
-		if (txqcq && txqcq->stats) {
-			tstats = &txqcq->stats->tx;
-			stats->tx_packets += tstats->pkts;
-			stats->tx_bytes += tstats->bytes;
-			stats->tx_tso += tstats->tso;
-			stats->tx_tso_bytes += tstats->tso_bytes;
-			stats->tx_csum_none += tstats->csum_none;
-			stats->tx_csum += tstats->csum;
-		}
+		txstats = &lif->txqstats[q_num];
+		stats->tx_packets += txstats->pkts;
+		stats->tx_bytes += txstats->bytes;
+		stats->tx_tso += txstats->tso;
+		stats->tx_tso_bytes += txstats->tso_bytes;
+		stats->tx_csum_none += txstats->csum_none;
+		stats->tx_csum += txstats->csum;
 
-		rxqcq = lif_to_rxqcq(lif, q_num);
-		if (rxqcq && rxqcq->stats) {
-			rstats = &rxqcq->stats->rx;
-			stats->rx_packets += rstats->pkts;
-			stats->rx_bytes += rstats->bytes;
-			stats->rx_csum_none += rstats->csum_none;
-			stats->rx_csum_complete += rstats->csum_complete;
-			stats->rx_csum_error += rstats->csum_error;
-		}
+		rxstats = &lif->rxqstats[q_num];
+		stats->rx_packets += rxstats->pkts;
+		stats->rx_bytes += rxstats->bytes;
+		stats->rx_csum_none += rxstats->csum_none;
+		stats->rx_csum_complete += rxstats->csum_complete;
+		stats->rx_csum_error += rxstats->csum_error;
 	}
 
 	ionic_get_stats64(lif->netdev, &ns);
@@ -371,7 +363,7 @@ static void ionic_sw_stats_get_values(struct ionic_lif *lif, u64 **buf)
 	}
 
 	for (q_num = 0; q_num < MAX_Q(lif); q_num++) {
-		txstats = &lif_to_txstats(lif, q_num);
+		txstats = &lif->txqstats[q_num];
 
 		for (i = 0; i < IONIC_NUM_TX_STATS; i++) {
 			**buf = IONIC_READ_STAT64(txstats,
@@ -381,7 +373,7 @@ static void ionic_sw_stats_get_values(struct ionic_lif *lif, u64 **buf)
 
 		if (test_bit(IONIC_LIF_F_UP, lif->state) &&
 		    test_bit(IONIC_LIF_F_SW_DEBUG_STATS, lif->state)) {
-			txqcq = lif_to_txqcq(lif, q_num);
+			txqcq = lif->txqcqs[q_num];
 			for (i = 0; i < IONIC_NUM_TX_Q_STATS; i++) {
 				**buf = IONIC_READ_STAT64(&txqcq->q,
 						      &ionic_txq_stats_desc[i]);
@@ -405,7 +397,7 @@ static void ionic_sw_stats_get_values(struct ionic_lif *lif, u64 **buf)
 	}
 
 	for (q_num = 0; q_num < MAX_Q(lif); q_num++) {
-		rxstats = &lif_to_rxstats(lif, q_num);
+		rxstats = &lif->rxqstats[q_num];
 
 		for (i = 0; i < IONIC_NUM_RX_STATS; i++) {
 			**buf = IONIC_READ_STAT64(rxstats,
@@ -415,7 +407,7 @@ static void ionic_sw_stats_get_values(struct ionic_lif *lif, u64 **buf)
 
 		if (test_bit(IONIC_LIF_F_UP, lif->state) &&
 		    test_bit(IONIC_LIF_F_SW_DEBUG_STATS, lif->state)) {
-			rxqcq = lif_to_rxqcq(lif, q_num);
+			rxqcq = lif->rxqcqs[q_num];
 			for (i = 0; i < IONIC_NUM_DBG_CQ_STATS; i++) {
 				**buf = IONIC_READ_STAT64(&rxqcq->cq,
 						   &ionic_dbg_cq_stats_desc[i]);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 8107d32c2767..220e132164e2 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -22,7 +22,7 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 static inline void ionic_txq_post(struct ionic_queue *q, bool ring_dbell,
 				  ionic_desc_cb cb_func, void *cb_arg)
 {
-	DEBUG_STATS_TXQ_POST(q_to_qcq(q), q->head->desc, ring_dbell);
+	DEBUG_STATS_TXQ_POST(q, q->head->desc, ring_dbell);
 
 	ionic_q_post(q, ring_dbell, cb_func, cb_arg);
 }
@@ -32,7 +32,7 @@ static inline void ionic_rxq_post(struct ionic_queue *q, bool ring_dbell,
 {
 	ionic_q_post(q, ring_dbell, cb_func, cb_arg);
 
-	DEBUG_STATS_RX_BUFF_CNT(q_to_qcq(q));
+	DEBUG_STATS_RX_BUFF_CNT(q);
 }
 
 static inline struct netdev_queue *q_to_ndq(struct ionic_queue *q)
@@ -49,7 +49,7 @@ static struct sk_buff *ionic_rx_skb_alloc(struct ionic_queue *q,
 	struct sk_buff *skb;
 
 	netdev = lif->netdev;
-	stats = q_to_rx_stats(q);
+	stats = &q->lif->rxqstats[q->index];
 
 	if (frags)
 		skb = napi_get_frags(&q_to_qcq(q)->napi);
@@ -502,7 +502,7 @@ int ionic_txrx_napi(struct napi_struct *napi, int budget)
 
 	lif = rxcq->bound_q->lif;
 	idev = &lif->ionic->idev;
-	txcq = &lif->txqcqs[qi].qcq->cq;
+	txcq = &lif->txqcqs[qi]->cq;
 
 	tx_work_done = ionic_cq_service(txcq, lif->tx_budget,
 					ionic_tx_service, NULL, NULL);
@@ -1111,9 +1111,9 @@ netdev_tx_t ionic_start_xmit(struct sk_buff *skb, struct net_device *netdev)
 		return NETDEV_TX_OK;
 	}
 
-	if (unlikely(!lif_to_txqcq(lif, queue_index)))
+	if (unlikely(queue_index >= lif->nxqs))
 		queue_index = 0;
-	q = lif_to_txq(lif, queue_index);
+	q = &lif->txqcqs[queue_index]->q;
 
 	ndescs = ionic_tx_descs_needed(q, skb);
 	if (ndescs < 0)

From d4881430f50d61a0656b54707e42cc3d6c08c2c8 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:24 -0700
Subject: [PATCH 06/12] ionic: clean up unnecessary non-static functions

ionic_open() and ionic_stop() are not referenced outside of their
defining file, so make them static.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 drivers/net/ethernet/pensando/ionic/ionic_lif.c | 4 ++--
 drivers/net/ethernet/pensando/ionic/ionic_lif.h | 2 --
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 03eee682f872..6a50bb6f090c 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1658,7 +1658,7 @@ static int ionic_start_queues(struct ionic_lif *lif)
 	return 0;
 }
 
-int ionic_open(struct net_device *netdev)
+static int ionic_open(struct net_device *netdev)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
 	int err;
@@ -1704,7 +1704,7 @@ static void ionic_stop_queues(struct ionic_lif *lif)
 	ionic_txrx_disable(lif);
 }
 
-int ionic_stop(struct net_device *netdev)
+static int ionic_stop(struct net_device *netdev)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index aa1cba74ba9b..517b51190d18 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -236,8 +236,6 @@ int ionic_lif_size(struct ionic *ionic);
 int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);
 
-int ionic_open(struct net_device *netdev);
-int ionic_stop(struct net_device *netdev);
 int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg);
 
 static inline void debug_stats_txq_post(struct ionic_queue *q,

From ea5a8b09dc3a6ce14cd3ea1a7f8ea8aea6fc92ec Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:25 -0700
Subject: [PATCH 07/12] ionic: reduce contiguous memory allocation requirement

Split out the queue descriptor blocks into separate dma
allocations to make for smaller blocks.

Co-developed-by: Neel Patel <neel@pensando.io>
Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../ethernet/pensando/ionic/ionic_debugfs.c   |  23 ++--
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 104 +++++++++++-------
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  12 +-
 3 files changed, 83 insertions(+), 56 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
index 11621ccc1faf..e12dbe4ea73d 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
@@ -112,7 +112,8 @@ static const struct debugfs_reg32 intr_ctrl_regs[] = {
 
 void ionic_debugfs_add_qcq(struct ionic_lif *lif, struct ionic_qcq *qcq)
 {
-	struct dentry *q_dentry, *cq_dentry, *intr_dentry, *stats_dentry;
+	struct dentry *qcq_dentry, *q_dentry, *cq_dentry;
+	struct dentry *intr_dentry, *stats_dentry;
 	struct ionic_dev *idev = &lif->ionic->idev;
 	struct debugfs_regset32 *intr_ctrl_regset;
 	struct ionic_intr_info *intr = &qcq->intr;
@@ -121,21 +122,21 @@ void ionic_debugfs_add_qcq(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	struct ionic_queue *q = &qcq->q;
 	struct ionic_cq *cq = &qcq->cq;
 
-	qcq->dentry = debugfs_create_dir(q->name, lif->dentry);
+	qcq_dentry = debugfs_create_dir(q->name, lif->dentry);
+	if (IS_ERR_OR_NULL(qcq_dentry))
+		return;
+	qcq->dentry = qcq_dentry;
 
-	debugfs_create_x32("total_size", 0400, qcq->dentry, &qcq->total_size);
-	debugfs_create_x64("base_pa", 0400, qcq->dentry, &qcq->base_pa);
+	debugfs_create_x64("q_base_pa", 0400, qcq_dentry, &qcq->q_base_pa);
+	debugfs_create_x32("q_size", 0400, qcq_dentry, &qcq->q_size);
+	debugfs_create_x64("cq_base_pa", 0400, qcq_dentry, &qcq->cq_base_pa);
+	debugfs_create_x32("cq_size", 0400, qcq_dentry, &qcq->cq_size);
+	debugfs_create_x64("sg_base_pa", 0400, qcq_dentry, &qcq->sg_base_pa);
+	debugfs_create_x32("sg_size", 0400, qcq_dentry, &qcq->sg_size);
 
 	q_dentry = debugfs_create_dir("q", qcq->dentry);
 
 	debugfs_create_u32("index", 0400, q_dentry, &q->index);
-	debugfs_create_x64("base_pa", 0400, q_dentry, &q->base_pa);
-	if (qcq->flags & IONIC_QCQ_F_SG) {
-		debugfs_create_x64("sg_base_pa", 0400, q_dentry,
-				   &q->sg_base_pa);
-		debugfs_create_u32("sg_desc_size", 0400, q_dentry,
-				   &q->sg_desc_size);
-	}
 	debugfs_create_u32("num_descs", 0400, q_dentry, &q->num_descs);
 	debugfs_create_u32("desc_size", 0400, q_dentry, &q->desc_size);
 	debugfs_create_u32("pid", 0400, q_dentry, &q->pid);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 6a50bb6f090c..c63d5dc8fa23 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -306,9 +306,23 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 
 	ionic_debugfs_del_qcq(qcq);
 
-	dma_free_coherent(dev, qcq->total_size, qcq->base, qcq->base_pa);
-	qcq->base = NULL;
-	qcq->base_pa = 0;
+	if (qcq->q_base) {
+		dma_free_coherent(dev, qcq->q_size, qcq->q_base, qcq->q_base_pa);
+		qcq->q_base = NULL;
+		qcq->q_base_pa = 0;
+	}
+
+	if (qcq->cq_base) {
+		dma_free_coherent(dev, qcq->cq_size, qcq->cq_base, qcq->cq_base_pa);
+		qcq->cq_base = NULL;
+		qcq->cq_base_pa = 0;
+	}
+
+	if (qcq->sg_base) {
+		dma_free_coherent(dev, qcq->sg_size, qcq->sg_base, qcq->sg_base_pa);
+		qcq->sg_base = NULL;
+		qcq->sg_base_pa = 0;
+	}
 
 	if (qcq->flags & IONIC_QCQ_F_INTR) {
 		irq_set_affinity_hint(qcq->intr.vector, NULL);
@@ -374,7 +388,6 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 			   unsigned int pid, struct ionic_qcq **qcq)
 {
 	struct ionic_dev *idev = &lif->ionic->idev;
-	u32 q_size, cq_size, sg_size, total_size;
 	struct device *dev = lif->ionic->dev;
 	void *q_base, *cq_base, *sg_base;
 	dma_addr_t cq_base_pa = 0;
@@ -385,21 +398,6 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 
 	*qcq = NULL;
 
-	q_size  = num_descs * desc_size;
-	cq_size = num_descs * cq_desc_size;
-	sg_size = num_descs * sg_desc_size;
-
-	total_size = ALIGN(q_size, PAGE_SIZE) + ALIGN(cq_size, PAGE_SIZE);
-	/* Note: aligning q_size/cq_size is not enough due to cq_base
-	 * address aligning as q_base could be not aligned to the page.
-	 * Adding PAGE_SIZE.
-	 */
-	total_size += PAGE_SIZE;
-	if (flags & IONIC_QCQ_F_SG) {
-		total_size += ALIGN(sg_size, PAGE_SIZE);
-		total_size += PAGE_SIZE;
-	}
-
 	new = devm_kzalloc(dev, sizeof(*new), GFP_KERNEL);
 	if (!new) {
 		netdev_err(lif->netdev, "Cannot allocate queue structure\n");
@@ -414,7 +412,7 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 	if (!new->q.info) {
 		netdev_err(lif->netdev, "Cannot allocate queue info\n");
 		err = -ENOMEM;
-		goto err_out;
+		goto err_out_free_qcq;
 	}
 
 	new->q.type = type;
@@ -423,7 +421,7 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 			   desc_size, sg_desc_size, pid);
 	if (err) {
 		netdev_err(lif->netdev, "Cannot initialize queue\n");
-		goto err_out;
+		goto err_out_free_q_info;
 	}
 
 	if (flags & IONIC_QCQ_F_INTR) {
@@ -471,46 +469,68 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 	err = ionic_cq_init(lif, &new->cq, &new->intr, num_descs, cq_desc_size);
 	if (err) {
 		netdev_err(lif->netdev, "Cannot initialize completion queue\n");
-		goto err_out_free_irq;
+		goto err_out_free_cq_info;
 	}
 
-	new->base = dma_alloc_coherent(dev, total_size, &new->base_pa,
-				       GFP_KERNEL);
-	if (!new->base) {
+	new->q_size = PAGE_SIZE + (num_descs * desc_size);
+	new->q_base = dma_alloc_coherent(dev, new->q_size, &new->q_base_pa,
+					 GFP_KERNEL);
+	if (!new->q_base) {
 		netdev_err(lif->netdev, "Cannot allocate queue DMA memory\n");
 		err = -ENOMEM;
-		goto err_out_free_irq;
+		goto err_out_free_cq_info;
 	}
-
-	new->total_size = total_size;
-
-	q_base = new->base;
-	q_base_pa = new->base_pa;
-
-	cq_base = (void *)ALIGN((uintptr_t)q_base + q_size, PAGE_SIZE);
-	cq_base_pa = ALIGN(q_base_pa + q_size, PAGE_SIZE);
-
-	if (flags & IONIC_QCQ_F_SG) {
-		sg_base = (void *)ALIGN((uintptr_t)cq_base + cq_size,
-					PAGE_SIZE);
-		sg_base_pa = ALIGN(cq_base_pa + cq_size, PAGE_SIZE);
-		ionic_q_sg_map(&new->q, sg_base, sg_base_pa);
-	}
-
+	q_base = PTR_ALIGN(new->q_base, PAGE_SIZE);
+	q_base_pa = ALIGN(new->q_base_pa, PAGE_SIZE);
 	ionic_q_map(&new->q, q_base, q_base_pa);
+
+	new->cq_size = PAGE_SIZE + (num_descs * cq_desc_size);
+	new->cq_base = dma_alloc_coherent(dev, new->cq_size, &new->cq_base_pa,
+					  GFP_KERNEL);
+	if (!new->cq_base) {
+		netdev_err(lif->netdev, "Cannot allocate cq DMA memory\n");
+		err = -ENOMEM;
+		goto err_out_free_q;
+	}
+	cq_base = PTR_ALIGN(new->cq_base, PAGE_SIZE);
+	cq_base_pa = ALIGN(new->cq_base_pa, PAGE_SIZE);
 	ionic_cq_map(&new->cq, cq_base, cq_base_pa);
 	ionic_cq_bind(&new->cq, &new->q);
 
+	if (flags & IONIC_QCQ_F_SG) {
+		new->sg_size = PAGE_SIZE + (num_descs * sg_desc_size);
+		new->sg_base = dma_alloc_coherent(dev, new->sg_size, &new->sg_base_pa,
+						  GFP_KERNEL);
+		if (!new->sg_base) {
+			netdev_err(lif->netdev, "Cannot allocate sg DMA memory\n");
+			err = -ENOMEM;
+			goto err_out_free_cq;
+		}
+		sg_base = PTR_ALIGN(new->sg_base, PAGE_SIZE);
+		sg_base_pa = ALIGN(new->sg_base_pa, PAGE_SIZE);
+		ionic_q_sg_map(&new->q, sg_base, sg_base_pa);
+	}
+
 	*qcq = new;
 
 	return 0;
 
+err_out_free_cq:
+	dma_free_coherent(dev, new->cq_size, new->cq_base, new->cq_base_pa);
+err_out_free_q:
+	dma_free_coherent(dev, new->q_size, new->q_base, new->q_base_pa);
+err_out_free_cq_info:
+	devm_kfree(dev, new->cq.info);
 err_out_free_irq:
 	if (flags & IONIC_QCQ_F_INTR)
 		devm_free_irq(dev, new->intr.vector, &new->napi);
 err_out_free_intr:
 	if (flags & IONIC_QCQ_F_INTR)
 		ionic_intr_free(lif->ionic, new->intr.index);
+err_out_free_q_info:
+	devm_kfree(dev, new->q.info);
+err_out_free_qcq:
+	devm_kfree(dev, new);
 err_out:
 	dev_err(dev, "qcq alloc of %s%d failed %d\n", name, index, err);
 	return err;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 517b51190d18..aa7c1a8cbefc 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -57,9 +57,15 @@ struct ionic_napi_stats {
 };
 
 struct ionic_qcq {
-	void *base;
-	dma_addr_t base_pa;
-	unsigned int total_size;
+	void *q_base;
+	dma_addr_t q_base_pa;
+	u32 q_size;
+	void *cq_base;
+	dma_addr_t cq_base_pa;
+	u32 cq_size;
+	void *sg_base;
+	dma_addr_t sg_base_pa;
+	u32 sg_size;
 	struct ionic_queue q;
 	struct ionic_cq cq;
 	struct ionic_intr_info intr;

From f1d2e894f1b77decfdae72fa41c24ddd2ecd33bc Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:26 -0700
Subject: [PATCH 08/12] ionic: use index not pointer for queue tracking

Use index counters rather than pointers for tracking head
and tail in the queues to save a little memory and to perhaps
slightly faster queue processing.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../ethernet/pensando/ionic/ionic_debugfs.c   |  6 +-
 .../net/ethernet/pensando/ionic/ionic_dev.c   | 40 ++++++-----
 .../net/ethernet/pensando/ionic/ionic_dev.h   | 49 +++++++++----
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 12 ++--
 .../net/ethernet/pensando/ionic/ionic_lif.h   | 12 ++--
 .../net/ethernet/pensando/ionic/ionic_main.c  | 26 ++++---
 .../net/ethernet/pensando/ionic/ionic_txrx.c  | 72 ++++++++++---------
 7 files changed, 129 insertions(+), 88 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
index e12dbe4ea73d..683bbbf75115 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_debugfs.c
@@ -76,7 +76,7 @@ static int q_tail_show(struct seq_file *seq, void *v)
 {
 	struct ionic_queue *q = seq->private;
 
-	seq_printf(seq, "%d\n", q->tail->index);
+	seq_printf(seq, "%d\n", q->tail_idx);
 
 	return 0;
 }
@@ -86,7 +86,7 @@ static int q_head_show(struct seq_file *seq, void *v)
 {
 	struct ionic_queue *q = seq->private;
 
-	seq_printf(seq, "%d\n", q->head->index);
+	seq_printf(seq, "%d\n", q->head_idx);
 
 	return 0;
 }
@@ -96,7 +96,7 @@ static int cq_tail_show(struct seq_file *seq, void *v)
 {
 	struct ionic_cq *cq = seq->private;
 
-	seq_printf(seq, "%d\n", cq->tail->index);
+	seq_printf(seq, "%d\n", cq->tail_idx);
 
 	return 0;
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.c b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
index 25cf376f3b40..3645673b4b18 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.c
@@ -482,7 +482,7 @@ int ionic_cq_init(struct ionic_lif *lif, struct ionic_cq *cq,
 	cq->bound_intr = intr;
 	cq->num_descs = num_descs;
 	cq->desc_size = desc_size;
-	cq->tail = cq->info;
+	cq->tail_idx = 0;
 	cq->done_color = 1;
 
 	cur = cq->info;
@@ -522,15 +522,18 @@ unsigned int ionic_cq_service(struct ionic_cq *cq, unsigned int work_to_do,
 			      ionic_cq_cb cb, ionic_cq_done_cb done_cb,
 			      void *done_arg)
 {
+	struct ionic_cq_info *cq_info;
 	unsigned int work_done = 0;
 
 	if (work_to_do == 0)
 		return 0;
 
-	while (cb(cq, cq->tail)) {
-		if (cq->tail->last)
+	cq_info = &cq->info[cq->tail_idx];
+	while (cb(cq, cq_info)) {
+		if (cq->tail_idx == cq->num_descs - 1)
 			cq->done_color = !cq->done_color;
-		cq->tail = cq->tail->next;
+		cq->tail_idx = (cq->tail_idx + 1) & (cq->num_descs - 1);
+		cq_info = &cq->info[cq->tail_idx];
 		DEBUG_STATS_CQE_CNT(cq);
 
 		if (++work_done >= work_to_do)
@@ -565,8 +568,8 @@ int ionic_q_init(struct ionic_lif *lif, struct ionic_dev *idev,
 	q->num_descs = num_descs;
 	q->desc_size = desc_size;
 	q->sg_desc_size = sg_desc_size;
-	q->tail = q->info;
-	q->head = q->tail;
+	q->tail_idx = 0;
+	q->head_idx = 0;
 	q->pid = pid;
 
 	snprintf(q->name, sizeof(q->name), "L%d-%s%u", lif->index, name, index);
@@ -614,19 +617,22 @@ void ionic_q_post(struct ionic_queue *q, bool ring_doorbell, ionic_desc_cb cb,
 		  void *cb_arg)
 {
 	struct device *dev = q->lif->ionic->dev;
+	struct ionic_desc_info *desc_info;
 	struct ionic_lif *lif = q->lif;
 
-	q->head->cb = cb;
-	q->head->cb_arg = cb_arg;
-	q->head = q->head->next;
+	desc_info = &q->info[q->head_idx];
+	desc_info->cb = cb;
+	desc_info->cb_arg = cb_arg;
+
+	q->head_idx = (q->head_idx + 1) & (q->num_descs - 1);
 
 	dev_dbg(dev, "lif=%d qname=%s qid=%d qtype=%d p_index=%d ringdb=%d\n",
 		q->lif->index, q->name, q->hw_type, q->hw_index,
-		q->head->index, ring_doorbell);
+		q->head_idx, ring_doorbell);
 
 	if (ring_doorbell)
 		ionic_dbell_ring(lif->kern_dbpage, q->hw_type,
-				 q->dbval | q->head->index);
+				 q->dbval | q->head_idx);
 }
 
 static bool ionic_q_is_posted(struct ionic_queue *q, unsigned int pos)
@@ -634,8 +640,8 @@ static bool ionic_q_is_posted(struct ionic_queue *q, unsigned int pos)
 	unsigned int mask, tail, head;
 
 	mask = q->num_descs - 1;
-	tail = q->tail->index;
-	head = q->head->index;
+	tail = q->tail_idx;
+	head = q->head_idx;
 
 	return ((pos - tail) & mask) < ((head - tail) & mask);
 }
@@ -648,18 +654,18 @@ void ionic_q_service(struct ionic_queue *q, struct ionic_cq_info *cq_info,
 	void *cb_arg;
 
 	/* check for empty queue */
-	if (q->tail->index == q->head->index)
+	if (q->tail_idx == q->head_idx)
 		return;
 
 	/* stop index must be for a descriptor that is not yet completed */
 	if (unlikely(!ionic_q_is_posted(q, stop_index)))
 		dev_err(q->lif->ionic->dev,
 			"ionic stop is not posted %s stop %u tail %u head %u\n",
-			q->name, stop_index, q->tail->index, q->head->index);
+			q->name, stop_index, q->tail_idx, q->head_idx);
 
 	do {
-		desc_info = q->tail;
-		q->tail = desc_info->next;
+		desc_info = &q->info[q->tail_idx];
+		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 		cb = desc_info->cb;
 		cb_arg = desc_info->cb_arg;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_dev.h b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
index d5cba502abca..9e2ac2b8a082 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_dev.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_dev.h
@@ -149,7 +149,13 @@ struct ionic_dev {
 };
 
 struct ionic_cq_info {
-	void *cq_desc;
+	union {
+		void *cq_desc;
+		struct ionic_txq_comp *txcq;
+		struct ionic_rxq_comp *rxcq;
+		struct ionic_admin_comp *admincq;
+		struct ionic_notifyq_event *notifyq;
+	};
 	struct ionic_cq_info *next;
 	unsigned int index;
 	bool last;
@@ -169,8 +175,17 @@ struct ionic_page_info {
 };
 
 struct ionic_desc_info {
-	void *desc;
-	void *sg_desc;
+	union {
+		void *desc;
+		struct ionic_txq_desc *txq_desc;
+		struct ionic_rxq_desc *rxq_desc;
+		struct ionic_admin_cmd *adminq_desc;
+	};
+	union {
+		void *sg_desc;
+		struct ionic_txq_sg_desc *txq_sg_desc;
+		struct ionic_rxq_sg_desc *rxq_sgl_desc;
+	};
 	struct ionic_desc_info *next;
 	unsigned int index;
 	unsigned int left;
@@ -183,22 +198,32 @@ struct ionic_desc_info {
 #define IONIC_QUEUE_NAME_MAX_SZ		32
 
 struct ionic_queue {
+	struct device *dev;
 	u64 dbell_count;
 	u64 drop;
 	u64 stop;
 	u64 wake;
 	struct ionic_lif *lif;
 	struct ionic_desc_info *info;
-	struct ionic_desc_info *tail;
-	struct ionic_desc_info *head;
 	struct ionic_dev *idev;
+	u16 head_idx;
+	u16 tail_idx;
 	unsigned int index;
 	unsigned int type;
 	unsigned int hw_index;
 	unsigned int hw_type;
 	u64 dbval;
-	void *base;
-	void *sg_base;
+	union {
+		void *base;
+		struct ionic_txq_desc *txq;
+		struct ionic_rxq_desc *rxq;
+		struct ionic_admin_cmd *adminq;
+	};
+	union {
+		void *sg_base;
+		struct ionic_txq_sg_desc *txq_sgl;
+		struct ionic_rxq_sg_desc *rxq_sgl;
+	};
 	dma_addr_t base_pa;
 	dma_addr_t sg_base_pa;
 	unsigned int num_descs;
@@ -225,9 +250,9 @@ struct ionic_cq {
 	dma_addr_t base_pa;
 	struct ionic_lif *lif;
 	struct ionic_cq_info *info;
-	struct ionic_cq_info *tail;
 	struct ionic_queue *bound_q;
 	struct ionic_intr_info *bound_intr;
+	u16 tail_idx;
 	bool done_color;
 	unsigned int num_descs;
 	u64 compl_count;
@@ -246,12 +271,12 @@ static inline void ionic_intr_init(struct ionic_dev *idev,
 
 static inline unsigned int ionic_q_space_avail(struct ionic_queue *q)
 {
-	unsigned int avail = q->tail->index;
+	unsigned int avail = q->tail_idx;
 
-	if (q->head->index >= avail)
-		avail += q->head->left - 1;
+	if (q->head_idx >= avail)
+		avail += q->num_descs - q->head_idx - 1;
 	else
-		avail -= q->head->index + 1;
+		avail -= q->head_idx + 1;
 
 	return avail;
 }
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index c63d5dc8fa23..2637eb83ae1f 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -632,9 +632,9 @@ static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	dev_dbg(dev, "txq_init.ver %d\n", ctx.cmd.q_init.ver);
 	dev_dbg(dev, "txq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
 
-	q->tail = q->info;
-	q->head = q->tail;
-	cq->tail = cq->info;
+	q->tail_idx = 0;
+	q->head_idx = 0;
+	cq->tail_idx = 0;
 
 	err = ionic_adminq_post_wait(lif, &ctx);
 	if (err)
@@ -689,9 +689,9 @@ static int ionic_lif_rxq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	dev_dbg(dev, "rxq_init.ver %d\n", ctx.cmd.q_init.ver);
 	dev_dbg(dev, "rxq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
 
-	q->tail = q->info;
-	q->head = q->tail;
-	cq->tail = cq->info;
+	q->tail_idx = 0;
+	q->head_idx = 0;
+	cq->tail_idx = 0;
 
 	err = ionic_adminq_post_wait(lif, &ctx);
 	if (err)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index aa7c1a8cbefc..b8f774b1db3a 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -244,14 +244,15 @@ int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 
 int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg);
 
-static inline void debug_stats_txq_post(struct ionic_queue *q,
-					struct ionic_txq_desc *desc, bool dbell)
+static inline void debug_stats_txq_post(struct ionic_queue *q, bool dbell)
 {
-	u8 num_sg_elems = ((le64_to_cpu(desc->cmd) >> IONIC_TXQ_DESC_NSGE_SHIFT)
-						& IONIC_TXQ_DESC_NSGE_MASK);
+	struct ionic_txq_desc *desc = &q->txq[q->head_idx];
+	u8 num_sg_elems;
 
 	q->dbell_count += dbell;
 
+	num_sg_elems = ((le64_to_cpu(desc->cmd) >> IONIC_TXQ_DESC_NSGE_SHIFT)
+						& IONIC_TXQ_DESC_NSGE_MASK);
 	if (num_sg_elems > (IONIC_MAX_NUM_SG_CNTR - 1))
 		num_sg_elems = IONIC_MAX_NUM_SG_CNTR - 1;
 
@@ -272,8 +273,7 @@ static inline void debug_stats_napi_poll(struct ionic_qcq *qcq,
 #define DEBUG_STATS_CQE_CNT(cq)		((cq)->compl_count++)
 #define DEBUG_STATS_RX_BUFF_CNT(q)	((q)->lif->rxqstats[q->index].buffers_posted++)
 #define DEBUG_STATS_INTR_REARM(intr)	((intr)->rearm_count++)
-#define DEBUG_STATS_TXQ_POST(q, txdesc, dbell) \
-	debug_stats_txq_post(q, txdesc, dbell)
+#define DEBUG_STATS_TXQ_POST(q, dbell)  debug_stats_txq_post(q, dbell)
 #define DEBUG_STATS_NAPI_POLL(qcq, work_done) \
 	debug_stats_napi_poll(qcq, work_done)
 
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_main.c b/drivers/net/ethernet/pensando/ionic/ionic_main.c
index df5b9bcc3aba..2b72a51be1d0 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_main.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_main.c
@@ -181,15 +181,17 @@ static const char *ionic_opcode_to_str(enum ionic_cmd_opcode opcode)
 
 static void ionic_adminq_flush(struct ionic_lif *lif)
 {
-	struct ionic_queue *adminq = &lif->adminqcq->q;
+	struct ionic_queue *q = &lif->adminqcq->q;
+	struct ionic_desc_info *desc_info;
 
 	spin_lock(&lif->adminq_lock);
 
-	while (adminq->tail != adminq->head) {
-		memset(adminq->tail->desc, 0, sizeof(union ionic_adminq_cmd));
-		adminq->tail->cb = NULL;
-		adminq->tail->cb_arg = NULL;
-		adminq->tail = adminq->tail->next;
+	while (q->tail_idx != q->head_idx) {
+		desc_info = &q->info[q->tail_idx];
+		memset(desc_info->desc, 0, sizeof(union ionic_adminq_cmd));
+		desc_info->cb = NULL;
+		desc_info->cb_arg = NULL;
+		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 	}
 	spin_unlock(&lif->adminq_lock);
 }
@@ -245,7 +247,8 @@ static void ionic_adminq_cb(struct ionic_queue *q,
 
 static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 {
-	struct ionic_queue *adminq;
+	struct ionic_desc_info *desc_info;
+	struct ionic_queue *q;
 	int err = 0;
 
 	WARN_ON(in_interrupt());
@@ -253,10 +256,10 @@ static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 	if (!lif->adminqcq)
 		return -EIO;
 
-	adminq = &lif->adminqcq->q;
+	q = &lif->adminqcq->q;
 
 	spin_lock(&lif->adminq_lock);
-	if (!ionic_q_has_space(adminq, 1)) {
+	if (!ionic_q_has_space(q, 1)) {
 		err = -ENOSPC;
 		goto err_out;
 	}
@@ -265,13 +268,14 @@ static int ionic_adminq_post(struct ionic_lif *lif, struct ionic_admin_ctx *ctx)
 	if (err)
 		goto err_out;
 
-	memcpy(adminq->head->desc, &ctx->cmd, sizeof(ctx->cmd));
+	desc_info = &q->info[q->head_idx];
+	memcpy(desc_info->desc, &ctx->cmd, sizeof(ctx->cmd));
 
 	dev_dbg(&lif->netdev->dev, "post admin queue command:\n");
 	dynamic_hex_dump("cmd ", DUMP_PREFIX_OFFSET, 16, 1,
 			 &ctx->cmd, sizeof(ctx->cmd), true);
 
-	ionic_q_post(adminq, true, ionic_adminq_cb, ctx);
+	ionic_q_post(q, true, ionic_adminq_cb, ctx);
 
 err_out:
 	spin_unlock(&lif->adminq_lock);
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
index 220e132164e2..c3291decd4c3 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_txrx.c
@@ -22,7 +22,7 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 static inline void ionic_txq_post(struct ionic_queue *q, bool ring_dbell,
 				  ionic_desc_cb cb_func, void *cb_arg)
 {
-	DEBUG_STATS_TXQ_POST(q, q->head->desc, ring_dbell);
+	DEBUG_STATS_TXQ_POST(q, ring_dbell);
 
 	ionic_q_post(q, ring_dbell, cb_func, cb_arg);
 }
@@ -235,14 +235,14 @@ static bool ionic_rx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 		return false;
 
 	/* check for empty queue */
-	if (q->tail->index == q->head->index)
+	if (q->tail_idx == q->head_idx)
 		return false;
 
-	desc_info = q->tail;
+	desc_info = &q->info[q->tail_idx];
 	if (desc_info->index != le16_to_cpu(comp->comp_index))
 		return false;
 
-	q->tail = desc_info->next;
+	q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 
 	/* clean the related q entry, only one per qc completion */
 	ionic_rx_clean(q, desc_info, cq_info, desc_info->cb_arg);
@@ -338,7 +338,7 @@ void ionic_rx_fill(struct ionic_queue *q)
 
 	for (i = ionic_q_space_avail(q); i; i--) {
 		remain_len = len;
-		desc_info = q->head;
+		desc_info = &q->info[q->head_idx];
 		desc = desc_info->desc;
 		sg_desc = desc_info->sg_desc;
 		page_info = &desc_info->pages[0];
@@ -387,7 +387,7 @@ void ionic_rx_fill(struct ionic_queue *q)
 	}
 
 	ionic_dbell_ring(q->lif->kern_dbpage, q->hw_type,
-			 q->dbval | q->head->index);
+			 q->dbval | q->head_idx);
 }
 
 static void ionic_rx_fill_cb(void *arg)
@@ -397,25 +397,29 @@ static void ionic_rx_fill_cb(void *arg)
 
 void ionic_rx_empty(struct ionic_queue *q)
 {
-	struct ionic_desc_info *cur;
+	struct ionic_desc_info *desc_info;
 	struct ionic_rxq_desc *desc;
 	unsigned int i;
+	u16 idx;
 
-	for (cur = q->tail; cur != q->head; cur = cur->next) {
-		desc = cur->desc;
+	idx = q->tail_idx;
+	while (idx != q->head_idx) {
+		desc_info = &q->info[idx];
+		desc = desc_info->desc;
 		desc->addr = 0;
 		desc->len = 0;
 
-		for (i = 0; i < cur->npages; i++) {
-			if (likely(cur->pages[i].page)) {
-				ionic_rx_page_free(q, cur->pages[i].page,
-						   cur->pages[i].dma_addr);
-				cur->pages[i].page = NULL;
-				cur->pages[i].dma_addr = 0;
+		for (i = 0; i < desc_info->npages; i++) {
+			if (likely(desc_info->pages[i].page)) {
+				ionic_rx_page_free(q, desc_info->pages[i].page,
+						   desc_info->pages[i].dma_addr);
+				desc_info->pages[i].page = NULL;
+				desc_info->pages[i].dma_addr = 0;
 			}
 		}
 
-		cur->cb_arg = NULL;
+		desc_info->cb_arg = NULL;
+		idx = (idx + 1) & (q->num_descs - 1);
 	}
 }
 
@@ -630,9 +634,9 @@ static bool ionic_tx_service(struct ionic_cq *cq, struct ionic_cq_info *cq_info)
 	 * several q entries completed for each cq completion
 	 */
 	do {
-		desc_info = q->tail;
-		q->tail = desc_info->next;
-		ionic_tx_clean(q, desc_info, cq->tail, desc_info->cb_arg);
+		desc_info = &q->info[q->tail_idx];
+		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
+		ionic_tx_clean(q, desc_info, cq_info, desc_info->cb_arg);
 		desc_info->cb = NULL;
 		desc_info->cb_arg = NULL;
 	} while (desc_info->index != le16_to_cpu(comp->comp_index));
@@ -658,9 +662,9 @@ void ionic_tx_empty(struct ionic_queue *q)
 	int done = 0;
 
 	/* walk the not completed tx entries, if any */
-	while (q->head != q->tail) {
-		desc_info = q->tail;
-		q->tail = desc_info->next;
+	while (q->head_idx != q->tail_idx) {
+		desc_info = &q->info[q->tail_idx];
+		q->tail_idx = (q->tail_idx + 1) & (q->num_descs - 1);
 		ionic_tx_clean(q, desc_info, NULL, desc_info->cb_arg);
 		desc_info->cb = NULL;
 		desc_info->cb_arg = NULL;
@@ -748,8 +752,8 @@ static void ionic_tx_tso_post(struct ionic_queue *q, struct ionic_txq_desc *desc
 static struct ionic_txq_desc *ionic_tx_tso_next(struct ionic_queue *q,
 						struct ionic_txq_sg_elem **elem)
 {
-	struct ionic_txq_sg_desc *sg_desc = q->head->sg_desc;
-	struct ionic_txq_desc *desc = q->head->desc;
+	struct ionic_txq_sg_desc *sg_desc = q->info[q->head_idx].txq_sg_desc;
+	struct ionic_txq_desc *desc = q->info[q->head_idx].txq_desc;
 
 	*elem = sg_desc->elems;
 	return desc;
@@ -758,13 +762,13 @@ static struct ionic_txq_desc *ionic_tx_tso_next(struct ionic_queue *q,
 static int ionic_tx_tso(struct ionic_queue *q, struct sk_buff *skb)
 {
 	struct ionic_tx_stats *stats = q_to_tx_stats(q);
-	struct ionic_desc_info *abort = q->head;
+	struct ionic_desc_info *rewind_desc_info;
 	struct device *dev = q->lif->ionic->dev;
-	struct ionic_desc_info *rewind = abort;
 	struct ionic_txq_sg_elem *elem;
 	struct ionic_txq_desc *desc;
 	unsigned int frag_left = 0;
 	unsigned int offset = 0;
+	u16 abort = q->head_idx;
 	unsigned int len_left;
 	dma_addr_t desc_addr;
 	unsigned int hdrlen;
@@ -772,6 +776,7 @@ static int ionic_tx_tso(struct ionic_queue *q, struct sk_buff *skb)
 	unsigned int seglen;
 	u64 total_bytes = 0;
 	u64 total_pkts = 0;
+	u16 rewind = abort;
 	unsigned int left;
 	unsigned int len;
 	unsigned int mss;
@@ -916,19 +921,20 @@ static int ionic_tx_tso(struct ionic_queue *q, struct sk_buff *skb)
 	return 0;
 
 err_out_abort:
-	while (rewind->desc != q->head->desc) {
-		ionic_tx_clean(q, rewind, NULL, NULL);
-		rewind = rewind->next;
+	while (rewind != q->head_idx) {
+		rewind_desc_info = &q->info[rewind];
+		ionic_tx_clean(q, rewind_desc_info, NULL, NULL);
+		rewind = (rewind + 1) & (q->num_descs - 1);
 	}
-	q->head = abort;
+	q->head_idx = abort;
 
 	return -ENOMEM;
 }
 
 static int ionic_tx_calc_csum(struct ionic_queue *q, struct sk_buff *skb)
 {
+	struct ionic_txq_desc *desc = q->info[q->head_idx].txq_desc;
 	struct ionic_tx_stats *stats = q_to_tx_stats(q);
-	struct ionic_txq_desc *desc = q->head->desc;
 	struct device *dev = q->lif->ionic->dev;
 	dma_addr_t dma_addr;
 	bool has_vlan;
@@ -967,8 +973,8 @@ static int ionic_tx_calc_csum(struct ionic_queue *q, struct sk_buff *skb)
 
 static int ionic_tx_calc_no_csum(struct ionic_queue *q, struct sk_buff *skb)
 {
+	struct ionic_txq_desc *desc = q->info[q->head_idx].txq_desc;
 	struct ionic_tx_stats *stats = q_to_tx_stats(q);
-	struct ionic_txq_desc *desc = q->head->desc;
 	struct device *dev = q->lif->ionic->dev;
 	dma_addr_t dma_addr;
 	bool has_vlan;
@@ -1002,7 +1008,7 @@ static int ionic_tx_calc_no_csum(struct ionic_queue *q, struct sk_buff *skb)
 
 static int ionic_tx_skb_frags(struct ionic_queue *q, struct sk_buff *skb)
 {
-	struct ionic_txq_sg_desc *sg_desc = q->head->sg_desc;
+	struct ionic_txq_sg_desc *sg_desc = q->info[q->head_idx].txq_sg_desc;
 	unsigned int len_left = skb->len - skb_headlen(skb);
 	struct ionic_txq_sg_elem *elem = sg_desc->elems;
 	struct ionic_tx_stats *stats = q_to_tx_stats(q);

From f053e1f8709819fdc3cdc03803ad137bade9a7d6 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:27 -0700
Subject: [PATCH 09/12] ionic: change mtu without full queue rebuild

We really don't need to tear down and rebuild the whole queue structure
when changing the MTU; we can simply stop the queues, clean and refill,
then restart the queues.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 57 ++++++++++++++++---
 1 file changed, 49 insertions(+), 8 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 2637eb83ae1f..176ffc1c16c6 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -36,6 +36,8 @@ static void ionic_lif_handle_fw_down(struct ionic_lif *lif);
 static void ionic_lif_handle_fw_up(struct ionic_lif *lif);
 static void ionic_lif_set_netdev_info(struct ionic_lif *lif);
 
+static void ionic_txrx_deinit(struct ionic_lif *lif);
+static int ionic_txrx_init(struct ionic_lif *lif);
 static int ionic_start_queues(struct ionic_lif *lif);
 static void ionic_stop_queues(struct ionic_lif *lif);
 static void ionic_lif_queue_identify(struct ionic_lif *lif);
@@ -593,6 +595,17 @@ static int ionic_qcqs_alloc(struct ionic_lif *lif)
 	return err;
 }
 
+static void ionic_qcq_sanitize(struct ionic_qcq *qcq)
+{
+	qcq->q.tail_idx = 0;
+	qcq->q.head_idx = 0;
+	qcq->cq.tail_idx = 0;
+	qcq->cq.done_color = 1;
+	memset(qcq->q_base, 0, qcq->q_size);
+	memset(qcq->cq_base, 0, qcq->cq_size);
+	memset(qcq->sg_base, 0, qcq->sg_size);
+}
+
 static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 {
 	struct device *dev = lif->ionic->dev;
@@ -632,9 +645,7 @@ static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	dev_dbg(dev, "txq_init.ver %d\n", ctx.cmd.q_init.ver);
 	dev_dbg(dev, "txq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
 
-	q->tail_idx = 0;
-	q->head_idx = 0;
-	cq->tail_idx = 0;
+	ionic_qcq_sanitize(qcq);
 
 	err = ionic_adminq_post_wait(lif, &ctx);
 	if (err)
@@ -689,9 +700,7 @@ static int ionic_lif_rxq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	dev_dbg(dev, "rxq_init.ver %d\n", ctx.cmd.q_init.ver);
 	dev_dbg(dev, "rxq_init.intr_index %d\n", ctx.cmd.q_init.intr_index);
 
-	q->tail_idx = 0;
-	q->head_idx = 0;
-	cq->tail_idx = 0;
+	ionic_qcq_sanitize(qcq);
 
 	err = ionic_adminq_post_wait(lif, &ctx);
 	if (err)
@@ -1307,6 +1316,35 @@ static int ionic_set_mac_address(struct net_device *netdev, void *sa)
 	return ionic_addr_add(netdev, mac);
 }
 
+static void ionic_stop_queues_reconfig(struct ionic_lif *lif)
+{
+	/* Stop and clean the queues before reconfiguration */
+	mutex_lock(&lif->queue_lock);
+	netif_device_detach(lif->netdev);
+	ionic_stop_queues(lif);
+	ionic_txrx_deinit(lif);
+}
+
+static int ionic_start_queues_reconfig(struct ionic_lif *lif)
+{
+	int err;
+
+	/* Re-init the queues after reconfiguration */
+
+	/* The only way txrx_init can fail here is if communication
+	 * with FW is suddenly broken.  There's not much we can do
+	 * at this point - error messages have already been printed,
+	 * so we can continue on and the user can eventually do a
+	 * DOWN and UP to try to reset and clear the issue.
+	 */
+	err = ionic_txrx_init(lif);
+	mutex_unlock(&lif->queue_lock);
+	ionic_link_status_check_request(lif);
+	netif_device_attach(lif->netdev);
+
+	return err;
+}
+
 static int ionic_change_mtu(struct net_device *netdev, int new_mtu)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
@@ -1326,9 +1364,12 @@ static int ionic_change_mtu(struct net_device *netdev, int new_mtu)
 		return err;
 
 	netdev->mtu = new_mtu;
-	err = ionic_reset_queues(lif, NULL, NULL);
+	/* if we're not running, nothing more to do */
+	if (!netif_running(netdev))
+		return 0;
 
-	return err;
+	ionic_stop_queues_reconfig(lif);
+	return ionic_start_queues_reconfig(lif);
 }
 
 static void ionic_tx_timeout_work(struct work_struct *ws)

From a34e25ab977ced1c3366fc69c0595bb3fde63fad Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:28 -0700
Subject: [PATCH 10/12] ionic: change the descriptor ring length without full
 reset

The original way of changing ring length was to completely
tear down the lif's queue structure and then rebuild it, while
running the risk of allocations that might fail in the middle
and leave us with a broken driver.

Instead, we can set up all the new queue and descriptor
allocations first, then swap them out and delete the old
allocations.  If the new allocations fail, we report the error,
stay with the old setup and continue running.  This gives us
a safer path, and a smaller window of time where we're not
processing traffic.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../ethernet/pensando/ionic/ionic_ethtool.c   |  35 +++--
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 145 +++++++++++++++++-
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  19 ++-
 3 files changed, 185 insertions(+), 14 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index 73af0ecc5495..adaefa5fe883 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -493,18 +493,14 @@ static void ionic_get_ringparam(struct net_device *netdev,
 	ring->rx_pending = lif->nrxq_descs;
 }
 
-static void ionic_set_ringsize(struct ionic_lif *lif, void *arg)
-{
-	struct ethtool_ringparam *ring = arg;
-
-	lif->ntxq_descs = ring->tx_pending;
-	lif->nrxq_descs = ring->rx_pending;
-}
-
 static int ionic_set_ringparam(struct net_device *netdev,
 			       struct ethtool_ringparam *ring)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
+	struct ionic_queue_params qparam;
+	int err;
+
+	ionic_init_queue_params(lif, &qparam);
 
 	if (ring->rx_mini_pending || ring->rx_jumbo_pending) {
 		netdev_info(netdev, "Changing jumbo or mini descriptors not supported\n");
@@ -522,7 +518,28 @@ static int ionic_set_ringparam(struct net_device *netdev,
 	    ring->rx_pending == lif->nrxq_descs)
 		return 0;
 
-	return ionic_reset_queues(lif, ionic_set_ringsize, ring);
+	if (ring->tx_pending != lif->ntxq_descs)
+		netdev_info(netdev, "Changing Tx ring size from %d to %d\n",
+			    lif->ntxq_descs, ring->tx_pending);
+
+	if (ring->rx_pending != lif->nrxq_descs)
+		netdev_info(netdev, "Changing Rx ring size from %d to %d\n",
+			    lif->nrxq_descs, ring->rx_pending);
+
+	/* if we're not running, just set the values and return */
+	if (!netif_running(lif->netdev)) {
+		lif->ntxq_descs = ring->tx_pending;
+		lif->nrxq_descs = ring->rx_pending;
+		return 0;
+	}
+
+	qparam.ntxq_descs = ring->tx_pending;
+	qparam.nrxq_descs = ring->rx_pending;
+	err = ionic_reconfigure_queues(lif, &qparam);
+	if (err)
+		netdev_info(netdev, "Ring reconfiguration failed, changes canceled: %d\n", err);
+
+	return err;
 }
 
 static void ionic_get_channels(struct net_device *netdev,
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 176ffc1c16c6..345259171265 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -333,10 +333,14 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 		ionic_intr_free(lif->ionic, qcq->intr.index);
 	}
 
-	devm_kfree(dev, qcq->cq.info);
-	qcq->cq.info = NULL;
-	devm_kfree(dev, qcq->q.info);
-	qcq->q.info = NULL;
+	if (qcq->cq.info) {
+		devm_kfree(dev, qcq->cq.info);
+		qcq->cq.info = NULL;
+	}
+	if (qcq->q.info) {
+		devm_kfree(dev, qcq->q.info);
+		qcq->q.info = NULL;
+	}
 	devm_kfree(dev, qcq);
 }
 
@@ -2047,6 +2051,139 @@ static const struct net_device_ops ionic_netdev_ops = {
 	.ndo_get_vf_stats       = ionic_get_vf_stats,
 };
 
+static void ionic_swap_queues(struct ionic_qcq *a, struct ionic_qcq *b)
+{
+	/* only swapping the queues, not the napi, flags, or other stuff */
+	swap(a->q.num_descs,  b->q.num_descs);
+	swap(a->q.base,       b->q.base);
+	swap(a->q.base_pa,    b->q.base_pa);
+	swap(a->q.info,       b->q.info);
+	swap(a->q_base,       b->q_base);
+	swap(a->q_base_pa,    b->q_base_pa);
+	swap(a->q_size,       b->q_size);
+
+	swap(a->q.sg_base,    b->q.sg_base);
+	swap(a->q.sg_base_pa, b->q.sg_base_pa);
+	swap(a->sg_base,      b->sg_base);
+	swap(a->sg_base_pa,   b->sg_base_pa);
+	swap(a->sg_size,      b->sg_size);
+
+	swap(a->cq.num_descs, b->cq.num_descs);
+	swap(a->cq.base,      b->cq.base);
+	swap(a->cq.base_pa,   b->cq.base_pa);
+	swap(a->cq.info,      b->cq.info);
+	swap(a->cq_base,      b->cq_base);
+	swap(a->cq_base_pa,   b->cq_base_pa);
+	swap(a->cq_size,      b->cq_size);
+}
+
+int ionic_reconfigure_queues(struct ionic_lif *lif,
+			     struct ionic_queue_params *qparam)
+{
+	struct ionic_qcq **tx_qcqs = NULL;
+	struct ionic_qcq **rx_qcqs = NULL;
+	unsigned int sg_desc_sz;
+	unsigned int flags;
+	int err = -ENOMEM;
+	unsigned int i;
+
+	/* allocate temporary qcq arrays to hold new queue structs */
+	if (qparam->ntxq_descs != lif->ntxq_descs) {
+		tx_qcqs = devm_kcalloc(lif->ionic->dev, lif->nxqs,
+				       sizeof(struct ionic_qcq *), GFP_KERNEL);
+		if (!tx_qcqs)
+			goto err_out;
+	}
+	if (qparam->nrxq_descs != lif->nrxq_descs) {
+		rx_qcqs = devm_kcalloc(lif->ionic->dev, lif->nxqs,
+				       sizeof(struct ionic_qcq *), GFP_KERNEL);
+		if (!rx_qcqs)
+			goto err_out;
+	}
+
+	/* allocate new desc_info and rings with no interrupt flag */
+	if (lif->qtype_info[IONIC_QTYPE_TXQ].version >= 1 &&
+	    lif->qtype_info[IONIC_QTYPE_TXQ].sg_desc_sz ==
+					  sizeof(struct ionic_txq_sg_desc_v1))
+		sg_desc_sz = sizeof(struct ionic_txq_sg_desc_v1);
+	else
+		sg_desc_sz = sizeof(struct ionic_txq_sg_desc);
+
+	if (tx_qcqs) {
+		for (i = 0; i < lif->nxqs; i++) {
+			flags = lif->txqcqs[i]->flags & ~IONIC_QCQ_F_INTR;
+			err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, i, "tx", flags,
+					      qparam->ntxq_descs,
+					      sizeof(struct ionic_txq_desc),
+					      sizeof(struct ionic_txq_comp),
+					      sg_desc_sz,
+					      lif->kern_pid, &tx_qcqs[i]);
+			if (err)
+				goto err_out;
+		}
+	}
+
+	if (rx_qcqs) {
+		for (i = 0; i < lif->nxqs; i++) {
+			flags = lif->rxqcqs[i]->flags & ~IONIC_QCQ_F_INTR;
+			err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, i, "rx", flags,
+					      qparam->nrxq_descs,
+					      sizeof(struct ionic_rxq_desc),
+					      sizeof(struct ionic_rxq_comp),
+					      sizeof(struct ionic_rxq_sg_desc),
+					      lif->kern_pid, &rx_qcqs[i]);
+			if (err)
+				goto err_out;
+		}
+	}
+
+	/* stop and clean the queues */
+	ionic_stop_queues_reconfig(lif);
+
+	/* swap new desc_info and rings, keeping existing interrupt config */
+	if (tx_qcqs) {
+		lif->ntxq_descs = qparam->ntxq_descs;
+		for (i = 0; i < lif->nxqs; i++)
+			ionic_swap_queues(lif->txqcqs[i], tx_qcqs[i]);
+	}
+
+	if (rx_qcqs) {
+		lif->nrxq_descs = qparam->nrxq_descs;
+		for (i = 0; i < lif->nxqs; i++)
+			ionic_swap_queues(lif->rxqcqs[i], rx_qcqs[i]);
+	}
+
+	/* re-init the queues */
+	err = ionic_start_queues_reconfig(lif);
+
+err_out:
+	/* free old allocs without cleaning intr */
+	for (i = 0; i < lif->nxqs; i++) {
+		if (tx_qcqs && tx_qcqs[i]) {
+			tx_qcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
+			ionic_qcq_free(lif, tx_qcqs[i]);
+			tx_qcqs[i] = NULL;
+		}
+		if (rx_qcqs && rx_qcqs[i]) {
+			rx_qcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
+			ionic_qcq_free(lif, rx_qcqs[i]);
+			rx_qcqs[i] = NULL;
+		}
+	}
+
+	/* free q array */
+	if (rx_qcqs) {
+		devm_kfree(lif->ionic->dev, rx_qcqs);
+		rx_qcqs = NULL;
+	}
+	if (tx_qcqs) {
+		devm_kfree(lif->ionic->dev, tx_qcqs);
+		tx_qcqs = NULL;
+	}
+
+	return err;
+}
+
 int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg)
 {
 	bool running;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index b8f774b1db3a..1df3e1e4107b 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -207,6 +207,22 @@ struct ionic_lif {
 	struct work_struct tx_timeout_work;
 };
 
+struct ionic_queue_params {
+	unsigned int nxqs;
+	unsigned int ntxq_descs;
+	unsigned int nrxq_descs;
+	unsigned int intr_split;
+};
+
+static inline void ionic_init_queue_params(struct ionic_lif *lif,
+					   struct ionic_queue_params *qparam)
+{
+	qparam->nxqs = lif->nxqs;
+	qparam->ntxq_descs = lif->ntxq_descs;
+	qparam->nrxq_descs = lif->nrxq_descs;
+	qparam->intr_split = test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
+}
+
 static inline u32 ionic_coal_usec_to_hw(struct ionic *ionic, u32 usecs)
 {
 	u32 mult = le32_to_cpu(ionic->ident.dev.intr_coal_mult);
@@ -241,7 +257,8 @@ int ionic_lif_identify(struct ionic *ionic, u8 lif_type,
 int ionic_lif_size(struct ionic *ionic);
 int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);
-
+int ionic_reconfigure_queues(struct ionic_lif *lif,
+			     struct ionic_queue_params *qparam);
 int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg);
 
 static inline void debug_stats_txq_post(struct ionic_queue *q, bool dbell)

From 101b40a0171facc0349b6304f33392c01b96d8fd Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:29 -0700
Subject: [PATCH 11/12] ionic: change queue count with no reset

Add to our new ionic_reconfigure_queues() to also be able to change
the number of queues in use, and to change the queue interrupt layout
between split and combined.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../ethernet/pensando/ionic/ionic_ethtool.c   |  88 ++++---
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 216 +++++++++++++-----
 2 files changed, 213 insertions(+), 91 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
index adaefa5fe883..00aad7168915 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_ethtool.c
@@ -561,32 +561,15 @@ static void ionic_get_channels(struct net_device *netdev,
 	}
 }
 
-static void ionic_set_queuecount(struct ionic_lif *lif, void *arg)
-{
-	struct ethtool_channels *ch = arg;
-
-	if (ch->combined_count) {
-		lif->nxqs = ch->combined_count;
-		if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state)) {
-			clear_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
-			lif->tx_coalesce_usecs = lif->rx_coalesce_usecs;
-			lif->tx_coalesce_hw = lif->rx_coalesce_hw;
-			netdev_info(lif->netdev, "Sharing queue interrupts\n");
-		}
-	} else {
-		lif->nxqs = ch->rx_count;
-		if (!test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state)) {
-			set_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
-			netdev_info(lif->netdev, "Splitting queue interrupts\n");
-		}
-	}
-}
-
 static int ionic_set_channels(struct net_device *netdev,
 			      struct ethtool_channels *ch)
 {
 	struct ionic_lif *lif = netdev_priv(netdev);
-	int new_cnt;
+	struct ionic_queue_params qparam;
+	int max_cnt;
+	int err;
+
+	ionic_init_queue_params(lif, &qparam);
 
 	if (ch->rx_count != ch->tx_count) {
 		netdev_info(netdev, "The rx and tx count must be equal\n");
@@ -594,20 +577,63 @@ static int ionic_set_channels(struct net_device *netdev,
 	}
 
 	if (ch->combined_count && ch->rx_count) {
-		netdev_info(netdev, "Use either combined_count or rx/tx_count, not both\n");
+		netdev_info(netdev, "Use either combined or rx and tx, not both\n");
 		return -EINVAL;
 	}
 
-	if (ch->combined_count)
-		new_cnt = ch->combined_count;
-	else
-		new_cnt = ch->rx_count;
+	max_cnt = lif->ionic->ntxqs_per_lif;
+	if (ch->combined_count) {
+		if (ch->combined_count > max_cnt)
+			return -EINVAL;
 
-	if (lif->nxqs != new_cnt)
-		netdev_info(netdev, "Changing queue count from %d to %d\n",
-			    lif->nxqs, new_cnt);
+		if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
+			netdev_info(lif->netdev, "Sharing queue interrupts\n");
+		else if (ch->combined_count == lif->nxqs)
+			return 0;
 
-	return ionic_reset_queues(lif, ionic_set_queuecount, ch);
+		if (lif->nxqs != ch->combined_count)
+			netdev_info(netdev, "Changing queue count from %d to %d\n",
+				    lif->nxqs, ch->combined_count);
+
+		qparam.nxqs = ch->combined_count;
+		qparam.intr_split = 0;
+	} else {
+		max_cnt /= 2;
+		if (ch->rx_count > max_cnt)
+			return -EINVAL;
+
+		if (!test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
+			netdev_info(lif->netdev, "Splitting queue interrupts\n");
+		else if (ch->rx_count == lif->nxqs)
+			return 0;
+
+		if (lif->nxqs != ch->rx_count)
+			netdev_info(netdev, "Changing queue count from %d to %d\n",
+				    lif->nxqs, ch->rx_count);
+
+		qparam.nxqs = ch->rx_count;
+		qparam.intr_split = 1;
+	}
+
+	/* if we're not running, just set the values and return */
+	if (!netif_running(lif->netdev)) {
+		lif->nxqs = qparam.nxqs;
+
+		if (qparam.intr_split) {
+			set_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
+		} else {
+			clear_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
+			lif->tx_coalesce_usecs = lif->rx_coalesce_usecs;
+			lif->tx_coalesce_hw = lif->rx_coalesce_hw;
+		}
+		return 0;
+	}
+
+	err = ionic_reconfigure_queues(lif, &qparam);
+	if (err)
+		netdev_info(netdev, "Queue reconfiguration failed, changes canceled: %d\n", err);
+
+	return err;
 }
 
 static u32 ionic_get_priv_flags(struct net_device *netdev)
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 345259171265..4b16dbf257d9 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -299,6 +299,18 @@ static void ionic_lif_qcq_deinit(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	qcq->flags &= ~IONIC_QCQ_F_INITED;
 }
 
+static void ionic_qcq_intr_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
+{
+	if (!(qcq->flags & IONIC_QCQ_F_INTR) || qcq->intr.vector == 0)
+		return;
+
+	irq_set_affinity_hint(qcq->intr.vector, NULL);
+	devm_free_irq(lif->ionic->dev, qcq->intr.vector, &qcq->napi);
+	qcq->intr.vector = 0;
+	ionic_intr_free(lif->ionic, qcq->intr.index);
+	qcq->intr.index = IONIC_INTR_INDEX_NOT_ASSIGNED;
+}
+
 static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 {
 	struct device *dev = lif->ionic->dev;
@@ -326,12 +338,7 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 		qcq->sg_base_pa = 0;
 	}
 
-	if (qcq->flags & IONIC_QCQ_F_INTR) {
-		irq_set_affinity_hint(qcq->intr.vector, NULL);
-		devm_free_irq(dev, qcq->intr.vector, &qcq->napi);
-		qcq->intr.vector = 0;
-		ionic_intr_free(lif->ionic, qcq->intr.index);
-	}
+	ionic_qcq_intr_free(lif, qcq);
 
 	if (qcq->cq.info) {
 		devm_kfree(dev, qcq->cq.info);
@@ -341,7 +348,6 @@ static void ionic_qcq_free(struct ionic_lif *lif, struct ionic_qcq *qcq)
 		devm_kfree(dev, qcq->q.info);
 		qcq->q.info = NULL;
 	}
-	devm_kfree(dev, qcq);
 }
 
 static void ionic_qcqs_free(struct ionic_lif *lif)
@@ -350,11 +356,13 @@ static void ionic_qcqs_free(struct ionic_lif *lif)
 
 	if (lif->notifyqcq) {
 		ionic_qcq_free(lif, lif->notifyqcq);
+		devm_kfree(dev, lif->notifyqcq);
 		lif->notifyqcq = NULL;
 	}
 
 	if (lif->adminqcq) {
 		ionic_qcq_free(lif, lif->adminqcq);
+		devm_kfree(dev, lif->adminqcq);
 		lif->adminqcq = NULL;
 	}
 
@@ -385,6 +393,53 @@ static void ionic_link_qcq_interrupts(struct ionic_qcq *src_qcq,
 	n_qcq->intr.index = src_qcq->intr.index;
 }
 
+static int ionic_alloc_qcq_interrupt(struct ionic_lif *lif, struct ionic_qcq *qcq)
+{
+	int err;
+
+	if (!(qcq->flags & IONIC_QCQ_F_INTR)) {
+		qcq->intr.index = IONIC_INTR_INDEX_NOT_ASSIGNED;
+		return 0;
+	}
+
+	err = ionic_intr_alloc(lif, &qcq->intr);
+	if (err) {
+		netdev_warn(lif->netdev, "no intr for %s: %d\n",
+			    qcq->q.name, err);
+		goto err_out;
+	}
+
+	err = ionic_bus_get_irq(lif->ionic, qcq->intr.index);
+	if (err < 0) {
+		netdev_warn(lif->netdev, "no vector for %s: %d\n",
+			    qcq->q.name, err);
+		goto err_out_free_intr;
+	}
+	qcq->intr.vector = err;
+	ionic_intr_mask_assert(lif->ionic->idev.intr_ctrl, qcq->intr.index,
+			       IONIC_INTR_MASK_SET);
+
+	err = ionic_request_irq(lif, qcq);
+	if (err) {
+		netdev_warn(lif->netdev, "irq request failed %d\n", err);
+		goto err_out_free_intr;
+	}
+
+	/* try to get the irq on the local numa node first */
+	qcq->intr.cpu = cpumask_local_spread(qcq->intr.index,
+					     dev_to_node(lif->ionic->dev));
+	if (qcq->intr.cpu != -1)
+		cpumask_set_cpu(qcq->intr.cpu, &qcq->intr.affinity_mask);
+
+	netdev_dbg(lif->netdev, "%s: Interrupt index %d\n", qcq->q.name, qcq->intr.index);
+	return 0;
+
+err_out_free_intr:
+	ionic_intr_free(lif->ionic, qcq->intr.index);
+err_out:
+	return err;
+}
+
 static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 			   unsigned int index,
 			   const char *name, unsigned int flags,
@@ -430,39 +485,9 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 		goto err_out_free_q_info;
 	}
 
-	if (flags & IONIC_QCQ_F_INTR) {
-		err = ionic_intr_alloc(lif, &new->intr);
-		if (err) {
-			netdev_warn(lif->netdev, "no intr for %s: %d\n",
-				    new->q.name, err);
-			goto err_out;
-		}
-
-		err = ionic_bus_get_irq(lif->ionic, new->intr.index);
-		if (err < 0) {
-			netdev_warn(lif->netdev, "no vector for %s: %d\n",
-				    new->q.name, err);
-			goto err_out_free_intr;
-		}
-		new->intr.vector = err;
-		ionic_intr_mask_assert(idev->intr_ctrl, new->intr.index,
-				       IONIC_INTR_MASK_SET);
-
-		err = ionic_request_irq(lif, new);
-		if (err) {
-			netdev_warn(lif->netdev, "irq request failed for %s: %d\n",
-				    new->q.name, err);
-			goto err_out_free_intr;
-		}
-
-		new->intr.cpu = cpumask_local_spread(new->intr.index,
-						     dev_to_node(dev));
-		if (new->intr.cpu != -1)
-			cpumask_set_cpu(new->intr.cpu,
-					&new->intr.affinity_mask);
-	} else {
-		new->intr.index = IONIC_INTR_INDEX_NOT_ASSIGNED;
-	}
+	err = ionic_alloc_qcq_interrupt(lif, new);
+	if (err)
+		goto err_out;
 
 	new->cq.info = devm_kcalloc(dev, num_descs, sizeof(*new->cq.info),
 				    GFP_KERNEL);
@@ -528,11 +553,10 @@ static int ionic_qcq_alloc(struct ionic_lif *lif, unsigned int type,
 err_out_free_cq_info:
 	devm_kfree(dev, new->cq.info);
 err_out_free_irq:
-	if (flags & IONIC_QCQ_F_INTR)
+	if (flags & IONIC_QCQ_F_INTR) {
 		devm_free_irq(dev, new->intr.vector, &new->napi);
-err_out_free_intr:
-	if (flags & IONIC_QCQ_F_INTR)
 		ionic_intr_free(lif->ionic, new->intr.index);
+	}
 err_out_free_q_info:
 	devm_kfree(dev, new->q.info);
 err_out_free_qcq:
@@ -635,7 +659,7 @@ static int ionic_lif_txq_init(struct ionic_lif *lif, struct ionic_qcq *qcq)
 	unsigned int intr_index;
 	int err;
 
-	if (test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state))
+	if (qcq->flags & IONIC_QCQ_F_INTR)
 		intr_index = qcq->intr.index;
 	else
 		intr_index = lif->rxqcqs[q->index]->intr.index;
@@ -1539,7 +1563,7 @@ static void ionic_txrx_deinit(struct ionic_lif *lif)
 	unsigned int i;
 
 	if (lif->txqcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < lif->nxqs && lif->txqcqs[i]; i++) {
 			ionic_lif_qcq_deinit(lif, lif->txqcqs[i]);
 			ionic_tx_flush(&lif->txqcqs[i]->cq);
 			ionic_tx_empty(&lif->txqcqs[i]->q);
@@ -1547,7 +1571,7 @@ static void ionic_txrx_deinit(struct ionic_lif *lif)
 	}
 
 	if (lif->rxqcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < lif->nxqs && lif->rxqcqs[i]; i++) {
 			ionic_lif_qcq_deinit(lif, lif->rxqcqs[i]);
 			ionic_rx_flush(&lif->rxqcqs[i]->cq);
 			ionic_rx_empty(&lif->rxqcqs[i]->q);
@@ -1561,15 +1585,17 @@ static void ionic_txrx_free(struct ionic_lif *lif)
 	unsigned int i;
 
 	if (lif->txqcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < lif->ionic->ntxqs_per_lif && lif->txqcqs[i]; i++) {
 			ionic_qcq_free(lif, lif->txqcqs[i]);
+			devm_kfree(lif->ionic->dev, lif->txqcqs[i]);
 			lif->txqcqs[i] = NULL;
 		}
 	}
 
 	if (lif->rxqcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < lif->ionic->nrxqs_per_lif && lif->rxqcqs[i]; i++) {
 			ionic_qcq_free(lif, lif->rxqcqs[i]);
+			devm_kfree(lif->ionic->dev, lif->rxqcqs[i]);
 			lif->rxqcqs[i] = NULL;
 		}
 	}
@@ -2088,20 +2114,22 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 	unsigned int i;
 
 	/* allocate temporary qcq arrays to hold new queue structs */
-	if (qparam->ntxq_descs != lif->ntxq_descs) {
-		tx_qcqs = devm_kcalloc(lif->ionic->dev, lif->nxqs,
+	if (qparam->nxqs != lif->nxqs || qparam->ntxq_descs != lif->ntxq_descs) {
+		tx_qcqs = devm_kcalloc(lif->ionic->dev, lif->ionic->ntxqs_per_lif,
 				       sizeof(struct ionic_qcq *), GFP_KERNEL);
 		if (!tx_qcqs)
 			goto err_out;
 	}
-	if (qparam->nrxq_descs != lif->nrxq_descs) {
-		rx_qcqs = devm_kcalloc(lif->ionic->dev, lif->nxqs,
+	if (qparam->nxqs != lif->nxqs || qparam->nrxq_descs != lif->nrxq_descs) {
+		rx_qcqs = devm_kcalloc(lif->ionic->dev, lif->ionic->nrxqs_per_lif,
 				       sizeof(struct ionic_qcq *), GFP_KERNEL);
 		if (!rx_qcqs)
 			goto err_out;
 	}
 
-	/* allocate new desc_info and rings with no interrupt flag */
+	/* allocate new desc_info and rings, but leave the interrupt setup
+	 * until later so as to not mess with the still-running queues
+	 */
 	if (lif->qtype_info[IONIC_QTYPE_TXQ].version >= 1 &&
 	    lif->qtype_info[IONIC_QTYPE_TXQ].sg_desc_sz ==
 					  sizeof(struct ionic_txq_sg_desc_v1))
@@ -2110,7 +2138,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 		sg_desc_sz = sizeof(struct ionic_txq_sg_desc);
 
 	if (tx_qcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < qparam->nxqs; i++) {
 			flags = lif->txqcqs[i]->flags & ~IONIC_QCQ_F_INTR;
 			err = ionic_qcq_alloc(lif, IONIC_QTYPE_TXQ, i, "tx", flags,
 					      qparam->ntxq_descs,
@@ -2124,7 +2152,7 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 	}
 
 	if (rx_qcqs) {
-		for (i = 0; i < lif->nxqs; i++) {
+		for (i = 0; i < qparam->nxqs; i++) {
 			flags = lif->rxqcqs[i]->flags & ~IONIC_QCQ_F_INTR;
 			err = ionic_qcq_alloc(lif, IONIC_QTYPE_RXQ, i, "rx", flags,
 					      qparam->nrxq_descs,
@@ -2140,33 +2168,90 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 	/* stop and clean the queues */
 	ionic_stop_queues_reconfig(lif);
 
+	if (qparam->nxqs != lif->nxqs) {
+		err = netif_set_real_num_tx_queues(lif->netdev, qparam->nxqs);
+		if (err)
+			goto err_out_reinit_unlock;
+		err = netif_set_real_num_rx_queues(lif->netdev, qparam->nxqs);
+		if (err) {
+			netif_set_real_num_tx_queues(lif->netdev, lif->nxqs);
+			goto err_out_reinit_unlock;
+		}
+	}
+
 	/* swap new desc_info and rings, keeping existing interrupt config */
 	if (tx_qcqs) {
 		lif->ntxq_descs = qparam->ntxq_descs;
-		for (i = 0; i < lif->nxqs; i++)
+		for (i = 0; i < qparam->nxqs; i++)
 			ionic_swap_queues(lif->txqcqs[i], tx_qcqs[i]);
 	}
 
 	if (rx_qcqs) {
 		lif->nrxq_descs = qparam->nrxq_descs;
-		for (i = 0; i < lif->nxqs; i++)
+		for (i = 0; i < qparam->nxqs; i++)
 			ionic_swap_queues(lif->rxqcqs[i], rx_qcqs[i]);
 	}
 
-	/* re-init the queues */
-	err = ionic_start_queues_reconfig(lif);
+	/* if we need to change the interrupt layout, this is the time */
+	if (qparam->intr_split != test_bit(IONIC_LIF_F_SPLIT_INTR, lif->state) ||
+	    qparam->nxqs != lif->nxqs) {
+		if (qparam->intr_split) {
+			set_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
+		} else {
+			clear_bit(IONIC_LIF_F_SPLIT_INTR, lif->state);
+			lif->tx_coalesce_usecs = lif->rx_coalesce_usecs;
+			lif->tx_coalesce_hw = lif->rx_coalesce_hw;
+		}
+
+		/* clear existing interrupt assignments */
+		for (i = 0; i < lif->ionic->ntxqs_per_lif; i++) {
+			ionic_qcq_intr_free(lif, lif->txqcqs[i]);
+			ionic_qcq_intr_free(lif, lif->rxqcqs[i]);
+		}
+
+		/* re-assign the interrupts */
+		for (i = 0; i < qparam->nxqs; i++) {
+			lif->rxqcqs[i]->flags |= IONIC_QCQ_F_INTR;
+			err = ionic_alloc_qcq_interrupt(lif, lif->rxqcqs[i]);
+			ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
+					     lif->rxqcqs[i]->intr.index,
+					     lif->rx_coalesce_hw);
+
+			if (qparam->intr_split) {
+				lif->txqcqs[i]->flags |= IONIC_QCQ_F_INTR;
+				err = ionic_alloc_qcq_interrupt(lif, lif->txqcqs[i]);
+				ionic_intr_coal_init(lif->ionic->idev.intr_ctrl,
+						     lif->txqcqs[i]->intr.index,
+						     lif->tx_coalesce_hw);
+			} else {
+				lif->txqcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
+				ionic_link_qcq_interrupts(lif->rxqcqs[i], lif->txqcqs[i]);
+			}
+		}
+	}
+
+	swap(lif->nxqs, qparam->nxqs);
+
+err_out_reinit_unlock:
+	/* re-init the queues, but don't loose an error code */
+	if (err)
+		ionic_start_queues_reconfig(lif);
+	else
+		err = ionic_start_queues_reconfig(lif);
 
 err_out:
 	/* free old allocs without cleaning intr */
-	for (i = 0; i < lif->nxqs; i++) {
+	for (i = 0; i < qparam->nxqs; i++) {
 		if (tx_qcqs && tx_qcqs[i]) {
 			tx_qcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
 			ionic_qcq_free(lif, tx_qcqs[i]);
+			devm_kfree(lif->ionic->dev, tx_qcqs[i]);
 			tx_qcqs[i] = NULL;
 		}
 		if (rx_qcqs && rx_qcqs[i]) {
 			rx_qcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
 			ionic_qcq_free(lif, rx_qcqs[i]);
+			devm_kfree(lif->ionic->dev, rx_qcqs[i]);
 			rx_qcqs[i] = NULL;
 		}
 	}
@@ -2181,6 +2266,17 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 		tx_qcqs = NULL;
 	}
 
+	/* clean the unused dma and info allocations when new set is smaller
+	 * than the full array, but leave the qcq shells in place
+	 */
+	for (i = lif->nxqs; i < lif->ionic->ntxqs_per_lif; i++) {
+		lif->txqcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
+		ionic_qcq_free(lif, lif->txqcqs[i]);
+
+		lif->rxqcqs[i]->flags &= ~IONIC_QCQ_F_INTR;
+		ionic_qcq_free(lif, lif->rxqcqs[i]);
+	}
+
 	return err;
 }
 

From 6f7d6f0fd7a36911d3a6c5857c03a022377563f0 Mon Sep 17 00:00:00 2001
From: Shannon Nelson <snelson@pensando.io>
Date: Thu, 27 Aug 2020 16:00:30 -0700
Subject: [PATCH 12/12] ionic: pull reset_queues into tx_timeout handler

Convert tx_timeout handler to not do the full reset.  As this was
the last user of ionic_reset_queues(), we can drop it.

Signed-off-by: Shannon Nelson <snelson@pensando.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 .../net/ethernet/pensando/ionic/ionic_lif.c   | 39 ++++---------------
 .../net/ethernet/pensando/ionic/ionic_lif.h   |  1 -
 2 files changed, 8 insertions(+), 32 deletions(-)

diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.c b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
index 4b16dbf257d9..eeaa73650986 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.c
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.c
@@ -1406,9 +1406,14 @@ static void ionic_tx_timeout_work(struct work_struct *ws)
 
 	netdev_info(lif->netdev, "Tx Timeout recovery\n");
 
-	rtnl_lock();
-	ionic_reset_queues(lif, NULL, NULL);
-	rtnl_unlock();
+	/* if we were stopped before this scheduled job was launched,
+	 * don't bother the queues as they are already stopped.
+	 */
+	if (!netif_running(lif->netdev))
+		return;
+
+	ionic_stop_queues_reconfig(lif);
+	ionic_start_queues_reconfig(lif);
 }
 
 static void ionic_tx_timeout(struct net_device *netdev, unsigned int txqueue)
@@ -2280,34 +2285,6 @@ int ionic_reconfigure_queues(struct ionic_lif *lif,
 	return err;
 }
 
-int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg)
-{
-	bool running;
-	int err = 0;
-
-	mutex_lock(&lif->queue_lock);
-	running = netif_running(lif->netdev);
-	if (running) {
-		netif_device_detach(lif->netdev);
-		err = ionic_stop(lif->netdev);
-		if (err)
-			goto reset_out;
-	}
-
-	if (cb)
-		cb(lif, arg);
-
-	if (running) {
-		err = ionic_open(lif->netdev);
-		netif_device_attach(lif->netdev);
-	}
-
-reset_out:
-	mutex_unlock(&lif->queue_lock);
-
-	return err;
-}
-
 int ionic_lif_alloc(struct ionic *ionic)
 {
 	struct device *dev = ionic->dev;
diff --git a/drivers/net/ethernet/pensando/ionic/ionic_lif.h b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
index 1df3e1e4107b..e1e6ff1a0918 100644
--- a/drivers/net/ethernet/pensando/ionic/ionic_lif.h
+++ b/drivers/net/ethernet/pensando/ionic/ionic_lif.h
@@ -259,7 +259,6 @@ int ionic_lif_rss_config(struct ionic_lif *lif, u16 types,
 			 const u8 *key, const u32 *indir);
 int ionic_reconfigure_queues(struct ionic_lif *lif,
 			     struct ionic_queue_params *qparam);
-int ionic_reset_queues(struct ionic_lif *lif, ionic_reset_cb cb, void *arg);
 
 static inline void debug_stats_txq_post(struct ionic_queue *q, bool dbell)
 {