Date:   Fri, 12 Jan 2018 13:37:05 +0300
From:   Igor Russkikh <igor.russkikh@...antia.com>
To:     "David S . Miller" <davem@...emloft.net>
Cc:     netdev@...r.kernel.org, David Arcari <darcari@...hat.com>,
        Pavel Belous <pavel.belous@...antia.com>,
        Igor Russkikh <igor.russkikh@...antia.com>
Subject: [PATCH net-next 14/22] net: aquantia: Cleanup pci functions module

Driver contained a dead code of maintaining multiple pci port instances.
That will never be used since for each pci function a separate NIC instance
is created. Simplify this, making pci module only responsible for
pci resource allocations. NIC initialization is also simplified accordingly

Signed-off-by: Igor Russkikh <igor.russkikh@...antia.com>
---
 drivers/net/ethernet/aquantia/atlantic/aq_hw.h     |   1 -
 drivers/net/ethernet/aquantia/atlantic/aq_main.c   |  14 +-
 drivers/net/ethernet/aquantia/atlantic/aq_nic.c    | 156 ++--------
 drivers/net/ethernet/aquantia/atlantic/aq_nic.h    |  13 +-
 .../net/ethernet/aquantia/atlantic/aq_pci_func.c   | 340 +++++++--------------
 .../net/ethernet/aquantia/atlantic/aq_pci_func.h   |  14 +-
 .../aquantia/atlantic/hw_atl/hw_atl_utils.c        |   2 -
 7 files changed, 156 insertions(+), 384 deletions(-)

diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
index 5792a7c..8219157 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_hw.h
@@ -31,7 +31,6 @@ struct aq_hw_caps_s {
 	u32 vecs;
 	u32 mtu;
 	u32 mac_regs_count;
-	u8 ports;
 	u8 msix_irqs;
 	u8 tcs;
 	u8 rxd_alignment;
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_main.c b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
index 887bc84..ba5fe8c 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_main.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_main.c
@@ -43,14 +43,9 @@ struct net_device *aq_ndev_alloc(void)
 
 static int aq_ndev_open(struct net_device *ndev)
 {
-	struct aq_nic_s *aq_nic = NULL;
 	int err = 0;
+	struct aq_nic_s *aq_nic = netdev_priv(ndev);
 
-	aq_nic = aq_nic_alloc_hot(ndev);
-	if (!aq_nic) {
-		err = -ENOMEM;
-		goto err_exit;
-	}
 	err = aq_nic_init(aq_nic);
 	if (err < 0)
 		goto err_exit;
@@ -73,7 +68,6 @@ static int aq_ndev_close(struct net_device *ndev)
 	if (err < 0)
 		goto err_exit;
 	aq_nic_deinit(aq_nic);
-	aq_nic_free_hot_resources(aq_nic);
 
 err_exit:
 	return err;
@@ -145,15 +139,13 @@ static void aq_ndev_set_multicast_settings(struct net_device *ndev)
 
 	err = aq_nic_set_packet_filter(aq_nic, ndev->flags);
 	if (err < 0)
-		goto err_exit;
+		return;
 
 	if (netdev_mc_count(ndev)) {
 		err = aq_nic_set_multicast_list(aq_nic, ndev);
 		if (err < 0)
-			goto err_exit;
+			return;
 	}
-
-err_exit:;
 }
 
 static const struct net_device_ops aq_ndev_ops = {
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
index 578aa59..c5450b9 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.c
@@ -14,7 +14,6 @@
 #include "aq_vec.h"
 #include "aq_hw.h"
 #include "aq_pci_func.h"
-#include "aq_main.h"
 
 #include <linux/moduleparam.h>
 #include <linux/netdevice.h>
@@ -61,17 +60,13 @@ static void aq_nic_rss_init(struct aq_nic_s *self, unsigned int num_rss_queues)
 		rss_params->indirection_table[i] = i & (num_rss_queues - 1);
 }
 
-/* Fills aq_nic_cfg with valid defaults */
-static void aq_nic_cfg_init_defaults(struct aq_nic_s *self)
+/* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
+void aq_nic_cfg_start(struct aq_nic_s *self)
 {
 	struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
 
-	cfg->vecs = AQ_CFG_VECS_DEF;
 	cfg->tcs = AQ_CFG_TCS_DEF;
 
-	cfg->rxds = AQ_CFG_RXDS_DEF;
-	cfg->txds = AQ_CFG_TXDS_DEF;
-
 	cfg->is_polling = AQ_CFG_IS_POLLING_DEF;
 
 	cfg->itr = aq_itr;
@@ -92,19 +87,13 @@ static void aq_nic_cfg_init_defaults(struct aq_nic_s *self)
 	cfg->vlan_id = 0U;
 
 	aq_nic_rss_init(self, cfg->num_rss_queues);
-}
-
-/* Checks hw_caps and 'corrects' aq_nic_cfg in runtime */
-int aq_nic_cfg_start(struct aq_nic_s *self)
-{
-	struct aq_nic_cfg_s *cfg = &self->aq_nic_cfg;
 
 	/*descriptors */
-	cfg->rxds = min(cfg->rxds, cfg->aq_hw_caps->rxds);
-	cfg->txds = min(cfg->txds, cfg->aq_hw_caps->txds);
+	cfg->rxds = min(cfg->aq_hw_caps->rxds, AQ_CFG_RXDS_DEF);
+	cfg->txds = min(cfg->aq_hw_caps->txds, AQ_CFG_TXDS_DEF);
 
 	/*rss rings */
-	cfg->vecs = min(cfg->vecs, cfg->aq_hw_caps->vecs);
+	cfg->vecs = min(cfg->aq_hw_caps->vecs, AQ_CFG_VECS_DEF);
 	cfg->vecs = min(cfg->vecs, num_online_cpus());
 	/* cfg->vecs should be power of 2 for RSS */
 	if (cfg->vecs >= 8U)
@@ -118,7 +107,7 @@ int aq_nic_cfg_start(struct aq_nic_s *self)
 
 	cfg->num_rss_queues = min(cfg->vecs, AQ_CFG_NUM_RSS_QUEUES_DEF);
 
-	cfg->irq_type = aq_pci_func_get_irq_type(self->aq_pci_func);
+	cfg->irq_type = aq_pci_func_get_irq_type(self);
 
 	if ((cfg->irq_type == AQ_HW_IRQ_LEGACY) ||
 	    (cfg->aq_hw_caps->vecs == 1U) ||
@@ -129,7 +118,6 @@ int aq_nic_cfg_start(struct aq_nic_s *self)
 
 	cfg->link_speed_msk &= cfg->aq_hw_caps->link_speed_msk;
 	cfg->hw_features = cfg->aq_hw_caps->hw_features;
-	return 0;
 }
 
 static int aq_nic_update_link_status(struct aq_nic_s *self)
@@ -203,49 +191,6 @@ static void aq_nic_polling_timer_cb(struct timer_list *t)
 		AQ_CFG_POLLING_TIMER_INTERVAL);
 }
 
-struct aq_nic_s *aq_nic_alloc_cold(struct pci_dev *pdev,
-				   struct aq_pci_func_s *aq_pci_func,
-				   unsigned int port,
-				   const struct aq_hw_ops *aq_hw_ops,
-				   const struct aq_hw_caps_s *aq_hw_caps)
-{
-	struct net_device *ndev = NULL;
-	struct aq_nic_s *self = NULL;
-	int err = 0;
-
-	ndev = aq_ndev_alloc();
-	if (!ndev) {
-		err = -ENOMEM;
-		goto err_exit;
-	}
-
-	self = netdev_priv(ndev);
-
-	SET_NETDEV_DEV(ndev, &pdev->dev);
-
-	ndev->if_port = port;
-	self->ndev = ndev;
-
-	self->aq_pci_func = aq_pci_func;
-
-	self->aq_hw_ops = aq_hw_ops;
-	self->aq_nic_cfg.aq_hw_caps = aq_hw_caps;
-	self->port = (u8)port;
-
-	self->aq_hw = self->aq_hw_ops->create(aq_pci_func, self->port);
-	if (err < 0)
-		goto err_exit;
-
-	aq_nic_cfg_init_defaults(self);
-
-err_exit:
-	if (err < 0) {
-		aq_nic_free_hot_resources(self);
-		self = NULL;
-	}
-	return self;
-}
-
 int aq_nic_ndev_register(struct aq_nic_s *self)
 {
 	int err = 0;
@@ -254,9 +199,10 @@ int aq_nic_ndev_register(struct aq_nic_s *self)
 		err = -EINVAL;
 		goto err_exit;
 	}
+
 	err = self->aq_hw_ops->hw_get_mac_permanent(self->aq_hw,
 			    self->ndev->dev_addr);
-	if (err < 0)
+	if (err)
 		goto err_exit;
 
 #if defined(AQ_CFG_MAC_ADDR_PERMANENT)
@@ -267,19 +213,29 @@ int aq_nic_ndev_register(struct aq_nic_s *self)
 	}
 #endif
 
+	for (self->aq_vecs = 0; self->aq_vecs < aq_nic_get_cfg(self)->vecs;
+	     self->aq_vecs++) {
+		self->aq_vec[self->aq_vecs] =
+		    aq_vec_alloc(self, self->aq_vecs, aq_nic_get_cfg(self));
+		if (!self->aq_vec[self->aq_vecs]) {
+			err = -ENOMEM;
+			goto err_exit;
+		}
+	}
+
 	netif_carrier_off(self->ndev);
 
 	netif_tx_disable(self->ndev);
 
 	err = register_netdev(self->ndev);
-	if (err < 0)
+	if (err)
 		goto err_exit;
 
 err_exit:
 	return err;
 }
 
-int aq_nic_ndev_init(struct aq_nic_s *self)
+void aq_nic_ndev_init(struct aq_nic_s *self)
 {
 	const struct aq_hw_caps_s *aq_hw_caps = self->aq_nic_cfg.aq_hw_caps;
 	struct aq_nic_cfg_s *aq_nic_cfg = &self->aq_nic_cfg;
@@ -290,60 +246,6 @@ int aq_nic_ndev_init(struct aq_nic_s *self)
 	self->ndev->mtu = aq_nic_cfg->mtu - ETH_HLEN;
 	self->ndev->max_mtu = aq_hw_caps->mtu - ETH_FCS_LEN - ETH_HLEN;
 
-	return 0;
-}
-
-void aq_nic_ndev_free(struct aq_nic_s *self)
-{
-	if (!self->ndev)
-		goto err_exit;
-
-	if (self->ndev->reg_state == NETREG_REGISTERED)
-		unregister_netdev(self->ndev);
-
-	if (self->aq_hw)
-		self->aq_hw_ops->destroy(self->aq_hw);
-
-	free_netdev(self->ndev);
-
-err_exit:;
-}
-
-struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev)
-{
-	struct aq_nic_s *self = NULL;
-	int err = 0;
-
-	if (!ndev) {
-		err = -EINVAL;
-		goto err_exit;
-	}
-	self = netdev_priv(ndev);
-
-	if (!self) {
-		err = -EINVAL;
-		goto err_exit;
-	}
-	if (netif_running(ndev))
-		netif_tx_disable(ndev);
-	netif_carrier_off(self->ndev);
-
-	for (self->aq_vecs = 0; self->aq_vecs < self->aq_nic_cfg.vecs;
-		self->aq_vecs++) {
-		self->aq_vec[self->aq_vecs] =
-		    aq_vec_alloc(self, self->aq_vecs, &self->aq_nic_cfg);
-		if (!self->aq_vec[self->aq_vecs]) {
-			err = -ENOMEM;
-			goto err_exit;
-		}
-	}
-
-err_exit:
-	if (err < 0) {
-		aq_nic_free_hot_resources(self);
-		self = NULL;
-	}
-	return self;
 }
 
 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
@@ -369,7 +271,7 @@ int aq_nic_init(struct aq_nic_s *self)
 		goto err_exit;
 
 	err = self->aq_hw_ops->hw_init(self->aq_hw,
-			    aq_nic_get_ndev(self)->dev_addr);
+				       aq_nic_get_ndev(self)->dev_addr);
 	if (err < 0)
 		goto err_exit;
 
@@ -377,6 +279,8 @@ int aq_nic_init(struct aq_nic_s *self)
 		self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
 		aq_vec_init(aq_vec, self->aq_hw_ops, self->aq_hw);
 
+	netif_carrier_off(self->ndev);
+
 err_exit:
 	return err;
 }
@@ -423,9 +327,9 @@ int aq_nic_start(struct aq_nic_s *self)
 	} else {
 		for (i = 0U, aq_vec = self->aq_vec[0];
 			self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
-			err = aq_pci_func_alloc_irq(self->aq_pci_func, i,
+			err = aq_pci_func_alloc_irq(self, i,
 						    self->ndev->name, aq_vec,
-					aq_vec_get_affinity_mask(aq_vec));
+						    aq_vec_get_affinity_mask(aq_vec));
 			if (err < 0)
 				goto err_exit;
 		}
@@ -616,8 +520,7 @@ int aq_nic_xmit(struct aq_nic_s *self, struct sk_buff *skb)
 
 	if (likely(frags)) {
 		err = self->aq_hw_ops->hw_ring_tx_xmit(self->aq_hw,
-						      ring,
-						      frags);
+						       ring, frags);
 		if (err >= 0) {
 			++ring->stats.tx.packets;
 			ring->stats.tx.bytes += skb->len;
@@ -673,7 +576,7 @@ int aq_nic_set_multicast_list(struct aq_nic_s *self, struct net_device *ndev)
 		self->packet_filter |= IFF_ALLMULTI;
 		self->aq_nic_cfg.mc_list_count = 0;
 		return self->aq_hw_ops->hw_packet_filter_set(self->aq_hw,
-							self->packet_filter);
+							     self->packet_filter);
 	} else {
 		return self->aq_hw_ops->hw_multicast_list_set(self->aq_hw,
 						    self->mc_list.ar,
@@ -756,7 +659,6 @@ void aq_nic_get_stats(struct aq_nic_s *self, u64 *data)
 	i++;
 
 	data += i;
-	count = 0U;
 
 	for (i = 0U, aq_vec = self->aq_vec[0];
 		aq_vec && self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i]) {
@@ -936,7 +838,7 @@ int aq_nic_stop(struct aq_nic_s *self)
 	if (self->aq_nic_cfg.is_polling)
 		del_timer_sync(&self->polling_timer);
 	else
-		aq_pci_func_free_irqs(self->aq_pci_func);
+		aq_pci_func_free_irqs(self);
 
 	for (i = 0U, aq_vec = self->aq_vec[0];
 		self->aq_vecs > i; ++i, aq_vec = self->aq_vec[i])
@@ -967,7 +869,7 @@ void aq_nic_deinit(struct aq_nic_s *self)
 err_exit:;
 }
 
-void aq_nic_free_hot_resources(struct aq_nic_s *self)
+void aq_nic_free_vectors(struct aq_nic_s *self)
 {
 	unsigned int i = 0U;
 
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
index 8e6e542..a85b08a 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_nic.h
@@ -17,7 +17,6 @@
 #include "aq_hw.h"
 
 struct aq_ring_s;
-struct aq_pci_func_s;
 struct aq_hw_ops;
 struct aq_fw_s;
 struct aq_vec_s;
@@ -64,7 +63,6 @@ struct aq_nic_s {
 	struct aq_ring_s *aq_ring_tx[AQ_CFG_VECS_MAX * AQ_CFG_TCS_MAX];
 	struct aq_hw_s *aq_hw;
 	struct net_device *ndev;
-	struct aq_pci_func_s *aq_pci_func;
 	unsigned int aq_vecs;
 	unsigned int packet_filter;
 	unsigned int power_state;
@@ -88,19 +86,13 @@ static inline struct device *aq_nic_get_dev(struct aq_nic_s *self)
 	return self->ndev->dev.parent;
 }
 
-struct aq_nic_s *aq_nic_alloc_cold(struct pci_dev *pdev,
-				   struct aq_pci_func_s *aq_pci_func,
-				   unsigned int port,
-				   const struct aq_hw_ops *aq_hw_ops,
-				   const struct aq_hw_caps_s *aq_hw_caps);
-int aq_nic_ndev_init(struct aq_nic_s *self);
+void aq_nic_ndev_init(struct aq_nic_s *self);
 struct aq_nic_s *aq_nic_alloc_hot(struct net_device *ndev);
 void aq_nic_set_tx_ring(struct aq_nic_s *self, unsigned int idx,
 			struct aq_ring_s *ring);
-struct device *aq_nic_get_dev(struct aq_nic_s *self);
 struct net_device *aq_nic_get_ndev(struct aq_nic_s *self);
 int aq_nic_init(struct aq_nic_s *self);
-int aq_nic_cfg_start(struct aq_nic_s *self);
+void aq_nic_cfg_start(struct aq_nic_s *self);
 int aq_nic_ndev_register(struct aq_nic_s *self);
 void aq_nic_ndev_free(struct aq_nic_s *self);
 int aq_nic_start(struct aq_nic_s *self);
@@ -111,6 +103,7 @@ void aq_nic_get_stats(struct aq_nic_s *self, u64 *data);
 int aq_nic_stop(struct aq_nic_s *self);
 void aq_nic_deinit(struct aq_nic_s *self);
 void aq_nic_free_hot_resources(struct aq_nic_s *self);
+void aq_nic_free_vectors(struct aq_nic_s *self);
 int aq_nic_set_mtu(struct aq_nic_s *self, int new_mtu);
 int aq_nic_set_mac(struct aq_nic_s *self, struct net_device *ndev);
 int aq_nic_set_packet_filter(struct aq_nic_s *self, unsigned int flags);
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
index e426e3e..f5dd5f7 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.c
@@ -12,27 +12,14 @@
 #include <linux/interrupt.h>
 #include <linux/module.h>
 
-#include "aq_pci_func.h"
+#include "aq_main.h"
 #include "aq_nic.h"
 #include "aq_vec.h"
 #include "aq_hw.h"
+#include "aq_pci_func.h"
 #include "hw_atl/hw_atl_a0.h"
 #include "hw_atl/hw_atl_b0.h"
 
-struct aq_pci_func_s {
-	struct pci_dev *pdev;
-	struct aq_nic_s *port[AQ_CFG_PCI_FUNC_PORTS];
-	void __iomem *mmio;
-	void *aq_vec[AQ_CFG_PCI_FUNC_MSIX_IRQS];
-	resource_size_t mmio_pa;
-	unsigned int msix_entry_mask;
-	unsigned int ports;
-	bool is_pci_enabled;
-	bool is_regions;
-	bool is_pci_using_dac;
-	struct aq_hw_caps_s aq_hw_caps;
-};
-
 static const struct pci_device_id aq_pci_tbl[] = {
 	{ PCI_VDEVICE(AQUANTIA, AQ_DEVICE_ID_0001), },
 	{ PCI_VDEVICE(AQUANTIA, AQ_DEVICE_ID_D100), },
@@ -118,156 +105,39 @@ static int aq_pci_probe_get_hw_by_id(struct pci_dev *pdev,
 	return 0;
 }
 
-struct aq_pci_func_s *aq_pci_func_alloc(const struct aq_hw_ops *aq_hw_ops,
-					const struct aq_hw_caps_s *aq_hw_caps,
-					struct pci_dev *pdev)
-{
-	struct aq_pci_func_s *self = NULL;
-	int err = 0;
-	unsigned int port = 0U;
-
-	if (!aq_hw_ops) {
-		err = -EFAULT;
-		goto err_exit;
-	}
-	self = kzalloc(sizeof(*self), GFP_KERNEL);
-	if (!self) {
-		err = -ENOMEM;
-		goto err_exit;
-	}
-
-	pci_set_drvdata(pdev, self);
-	self->pdev = pdev;
-	self->aq_hw_caps = *aq_hw_caps;
-
-	self->ports = self->aq_hw_caps.ports;
-
-	for (port = 0; port < self->ports; ++port) {
-		struct aq_nic_s *aq_nic = aq_nic_alloc_cold(pdev, self,
-							    port, aq_hw_ops,
-							    aq_hw_caps);
-
-		if (!aq_nic) {
-			err = -ENOMEM;
-			goto err_exit;
-		}
-		self->port[port] = aq_nic;
-	}
-
-err_exit:
-	if (err < 0) {
-		if (self)
-			aq_pci_func_free(self);
-		self = NULL;
-	}
-
-	(void)err;
-	return self;
-}
-
-int aq_pci_func_init(struct aq_pci_func_s *self)
+int aq_pci_func_init(struct pci_dev *pdev)
 {
 	int err = 0;
-	unsigned int bar = 0U;
-	unsigned int port = 0U;
-	unsigned int numvecs = 0U;
-
-	err = pci_enable_device(self->pdev);
-	if (err < 0)
-		goto err_exit;
 
-	self->is_pci_enabled = true;
-
-	err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(64));
+	err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
 	if (!err) {
-		err = pci_set_consistent_dma_mask(self->pdev, DMA_BIT_MASK(64));
-		self->is_pci_using_dac = 1;
+		err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
+
 	}
 	if (err) {
-		err = pci_set_dma_mask(self->pdev, DMA_BIT_MASK(32));
+		err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 		if (!err)
-			err = pci_set_consistent_dma_mask(self->pdev,
+			err = pci_set_consistent_dma_mask(pdev,
 							  DMA_BIT_MASK(32));
-		self->is_pci_using_dac = 0;
 	}
 	if (err != 0) {
 		err = -ENOSR;
 		goto err_exit;
 	}
 
-	err = pci_request_regions(self->pdev, AQ_CFG_DRV_NAME "_mmio");
+	err = pci_request_regions(pdev, AQ_CFG_DRV_NAME "_mmio");
 	if (err < 0)
 		goto err_exit;
 
-	self->is_regions = true;
+	pci_set_master(pdev);
 
-	pci_set_master(self->pdev);
-
-	for (bar = 0; bar < 4; ++bar) {
-		if (IORESOURCE_MEM & pci_resource_flags(self->pdev, bar)) {
-			resource_size_t reg_sz;
-
-			self->mmio_pa = pci_resource_start(self->pdev, bar);
-			if (self->mmio_pa == 0U) {
-				err = -EIO;
-				goto err_exit;
-			}
-
-			reg_sz = pci_resource_len(self->pdev, bar);
-			if ((reg_sz <= 24 /*ATL_REGS_SIZE*/)) {
-				err = -EIO;
-				goto err_exit;
-			}
-
-			self->mmio = ioremap_nocache(self->mmio_pa, reg_sz);
-			if (!self->mmio) {
-				err = -EIO;
-				goto err_exit;
-			}
-			break;
-		}
-	}
-
-	numvecs = min((u8)AQ_CFG_VECS_DEF, self->aq_hw_caps.msix_irqs);
-	numvecs = min(numvecs, num_online_cpus());
-
-	/* enable interrupts */
-#if !AQ_CFG_FORCE_LEGACY_INT
-	err = pci_alloc_irq_vectors(self->pdev, numvecs, numvecs, PCI_IRQ_MSIX);
-
-	if (err < 0) {
-		err = pci_alloc_irq_vectors(self->pdev, 1, 1,
-				PCI_IRQ_MSI | PCI_IRQ_LEGACY);
-		if (err < 0)
-			goto err_exit;
-	}
-#endif /* AQ_CFG_FORCE_LEGACY_INT */
-
-	/* net device init */
-	for (port = 0; port < self->ports; ++port) {
-		if (!self->port[port])
-			continue;
-
-		err = aq_nic_cfg_start(self->port[port]);
-		if (err < 0)
-			goto err_exit;
-
-		err = aq_nic_ndev_init(self->port[port]);
-		if (err < 0)
-			goto err_exit;
-
-		err = aq_nic_ndev_register(self->port[port]);
-		if (err < 0)
-			goto err_exit;
-	}
+	return 0;
 
 err_exit:
-	if (err < 0)
-		aq_pci_func_deinit(self);
 	return err;
 }
 
-int aq_pci_func_alloc_irq(struct aq_pci_func_s *self, unsigned int i,
+int aq_pci_func_alloc_irq(struct aq_nic_s *self, unsigned int i,
 			  char *name, void *aq_vec, cpumask_t *affinity_mask)
 {
 	struct pci_dev *pdev = self->pdev;
@@ -288,11 +158,10 @@ int aq_pci_func_alloc_irq(struct aq_pci_func_s *self, unsigned int i,
 			irq_set_affinity_hint(pci_irq_vector(pdev, i),
 					      affinity_mask);
 	}
-
 	return err;
 }
 
-void aq_pci_func_free_irqs(struct aq_pci_func_s *self)
+void aq_pci_func_free_irqs(struct aq_nic_s *self)
 {
 	struct pci_dev *pdev = self->pdev;
 	unsigned int i = 0U;
@@ -308,12 +177,7 @@ void aq_pci_func_free_irqs(struct aq_pci_func_s *self)
 	}
 }
 
-void __iomem *aq_pci_func_get_mmio(struct aq_pci_func_s *self)
-{
-	return self->mmio;
-}
-
-unsigned int aq_pci_func_get_irq_type(struct aq_pci_func_s *self)
+unsigned int aq_pci_func_get_irq_type(struct aq_nic_s *self)
 {
 	if (self->pdev->msix_enabled)
 		return AQ_HW_IRQ_MSIX;
@@ -322,118 +186,148 @@ unsigned int aq_pci_func_get_irq_type(struct aq_pci_func_s *self)
 	return AQ_HW_IRQ_LEGACY;
 }
 
-void aq_pci_func_deinit(struct aq_pci_func_s *self)
+static void aq_pci_free_irq_vectors(struct aq_nic_s *self)
 {
-	if (!self)
-		goto err_exit;
-
-	aq_pci_func_free_irqs(self);
 	pci_free_irq_vectors(self->pdev);
+}
 
-	if (self->is_regions)
-		pci_release_regions(self->pdev);
+static int aq_pci_probe(struct pci_dev *pdev,
+			const struct pci_device_id *pci_id)
+{
+	struct aq_nic_s *self = NULL;
+	int err = 0;
+	struct net_device *ndev;
+	resource_size_t mmio_pa;
+	u32 bar;
+	u32 numvecs;
 
-	if (self->is_pci_enabled)
-		pci_disable_device(self->pdev);
+	err = pci_enable_device(pdev);
+	if (err)
+		return err;
 
-err_exit:;
-}
+	err = aq_pci_func_init(pdev);
+	if (err)
+		goto err_pci_func;
 
-void aq_pci_func_free(struct aq_pci_func_s *self)
-{
-	unsigned int port = 0U;
+	ndev = aq_ndev_alloc();
+	if (!ndev)
+		goto err_ndev;
 
-	if (!self)
-		goto err_exit;
+	self = netdev_priv(ndev);
+	self->pdev = pdev;
+	SET_NETDEV_DEV(ndev, &pdev->dev);
+	pci_set_drvdata(pdev, self);
 
-	for (port = 0; port < self->ports; ++port) {
-		if (!self->port[port])
-			continue;
+	err = aq_pci_probe_get_hw_by_id(pdev, &self->aq_hw_ops,
+					&aq_nic_get_cfg(self)->aq_hw_caps);
+	if (err)
+		goto err_ioremap;
 
-		aq_nic_ndev_free(self->port[port]);
-	}
+	self->aq_hw = kzalloc(sizeof(*self->aq_hw), GFP_KERNEL);
+	self->aq_hw->aq_nic_cfg = aq_nic_get_cfg(self);
 
-	if (self->mmio)
-		iounmap(self->mmio);
+	for (bar = 0; bar < 4; ++bar) {
+		if (IORESOURCE_MEM & pci_resource_flags(pdev, bar)) {
+			resource_size_t reg_sz;
 
-	kfree(self);
+			mmio_pa = pci_resource_start(pdev, bar);
+			if (mmio_pa == 0U) {
+				err = -EIO;
+				goto err_ioremap;
+			}
 
-err_exit:;
-}
+			reg_sz = pci_resource_len(pdev, bar);
+			if ((reg_sz <= 24 /*ATL_REGS_SIZE*/)) {
+				err = -EIO;
+				goto err_ioremap;
+			}
 
-int aq_pci_func_change_pm_state(struct aq_pci_func_s *self,
-				pm_message_t *pm_msg)
-{
-	int err = 0;
-	unsigned int port = 0U;
+			self->aq_hw->mmio = ioremap_nocache(mmio_pa, reg_sz);
+			if (!self->aq_hw->mmio) {
+				err = -EIO;
+				goto err_ioremap;
+			}
+			break;
+		}
+	}
 
-	if (!self) {
-		err = -EFAULT;
-		goto err_exit;
+	if (bar == 4) {
+		err = -EIO;
+		goto err_ioremap;
 	}
-	for (port = 0; port < self->ports; ++port) {
-		if (!self->port[port])
-			continue;
 
-		(void)aq_nic_change_pm_state(self->port[port], pm_msg);
+	numvecs = min((u8)AQ_CFG_VECS_DEF,
+		      aq_nic_get_cfg(self)->aq_hw_caps->msix_irqs);
+	numvecs = min(numvecs, num_online_cpus());
+	/*enable interrupts */
+#if !AQ_CFG_FORCE_LEGACY_INT
+	err = pci_alloc_irq_vectors(self->pdev, numvecs, numvecs,
+				    PCI_IRQ_MSIX);
+
+	if (err < 0) {
+		err = pci_alloc_irq_vectors(self->pdev, 1, 1,
+					    PCI_IRQ_MSI | PCI_IRQ_LEGACY);
+		if (err < 0)
+			goto err_hwinit;
 	}
+#endif
 
-err_exit:
-	return err;
-}
+	/* net device init */
+	aq_nic_cfg_start(self);
 
-static int aq_pci_probe(struct pci_dev *pdev,
-			const struct pci_device_id *pci_id)
-{
-	const struct aq_hw_ops *aq_hw_ops = NULL;
-	const struct aq_hw_caps_s *aq_hw_caps = NULL;
-	struct aq_pci_func_s *aq_pci_func = NULL;
-	int err = 0;
+	aq_nic_ndev_init(self);
 
-	err = pci_enable_device(pdev);
-	if (err < 0)
-		goto err_exit;
-	err = aq_pci_probe_get_hw_by_id(pdev, &aq_hw_ops, &aq_hw_caps);
-	if (err < 0)
-		goto err_exit;
-	aq_pci_func = aq_pci_func_alloc(aq_hw_ops, aq_hw_caps, pdev);
-	if (!aq_pci_func) {
-		err = -ENOMEM;
-		goto err_exit;
-	}
-	err = aq_pci_func_init(aq_pci_func);
+	err = aq_nic_ndev_register(self);
 	if (err < 0)
-		goto err_exit;
+		goto err_register;
 
-err_exit:
-	if (err < 0) {
-		if (aq_pci_func)
-			aq_pci_func_free(aq_pci_func);
-	}
+	return 0;
+
+err_register:
+	aq_nic_free_vectors(self);
+	aq_pci_free_irq_vectors(self);
+err_hwinit:
+	iounmap(self->aq_hw->mmio);
+err_ioremap:
+	free_netdev(ndev);
+err_pci_func:
+	pci_release_regions(pdev);
+err_ndev:
+	pci_disable_device(pdev);
 	return err;
 }
 
 static void aq_pci_remove(struct pci_dev *pdev)
 {
-	struct aq_pci_func_s *aq_pci_func = pci_get_drvdata(pdev);
+	struct aq_nic_s *self = pci_get_drvdata(pdev);
+
+	if (self->ndev) {
+		if (self->ndev->reg_state == NETREG_REGISTERED)
+			unregister_netdev(self->ndev);
+		aq_nic_free_vectors(self);
+		aq_pci_free_irq_vectors(self);
+		iounmap(self->aq_hw->mmio);
+		kfree(self->aq_hw);
+		pci_release_regions(pdev);
+		free_netdev(self->ndev);
+	}
 
-	aq_pci_func_deinit(aq_pci_func);
-	aq_pci_func_free(aq_pci_func);
+	pci_disable_device(pdev);
 }
 
 static int aq_pci_suspend(struct pci_dev *pdev, pm_message_t pm_msg)
 {
-	struct aq_pci_func_s *aq_pci_func = pci_get_drvdata(pdev);
+	struct aq_nic_s *self = pci_get_drvdata(pdev);
 
-	return aq_pci_func_change_pm_state(aq_pci_func, &pm_msg);
+	return aq_nic_change_pm_state(self, &pm_msg);
 }
 
 static int aq_pci_resume(struct pci_dev *pdev)
 {
-	struct aq_pci_func_s *aq_pci_func = pci_get_drvdata(pdev);
+	struct aq_nic_s *self = pci_get_drvdata(pdev);
 	pm_message_t pm_msg = PMSG_RESTORE;
 
-	return aq_pci_func_change_pm_state(aq_pci_func, &pm_msg);
+	return aq_nic_change_pm_state(self, &pm_msg);
 }
 
 static struct pci_driver aq_pci_ops = {
diff --git a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
index 701c996..aeee67b 100644
--- a/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
+++ b/drivers/net/ethernet/aquantia/atlantic/aq_pci_func.h
@@ -22,17 +22,11 @@ struct aq_board_revision_s {
 	const struct aq_hw_caps_s *caps;
 };
 
-int aq_pci_func_init(struct aq_pci_func_s *self);
-int aq_pci_func_alloc_irq(struct aq_pci_func_s *self, unsigned int i,
+int aq_pci_func_init(struct pci_dev *pdev);
+int aq_pci_func_alloc_irq(struct aq_nic_s *self, unsigned int i,
 			  char *name, void *aq_vec,
 			  cpumask_t *affinity_mask);
-void aq_pci_func_free_irqs(struct aq_pci_func_s *self);
-int aq_pci_func_start(struct aq_pci_func_s *self);
-void __iomem *aq_pci_func_get_mmio(struct aq_pci_func_s *self);
-unsigned int aq_pci_func_get_irq_type(struct aq_pci_func_s *self);
-void aq_pci_func_deinit(struct aq_pci_func_s *self);
-void aq_pci_func_free(struct aq_pci_func_s *self);
-int aq_pci_func_change_pm_state(struct aq_pci_func_s *self,
-				pm_message_t *pm_msg);
+void aq_pci_func_free_irqs(struct aq_nic_s *self);
+unsigned int aq_pci_func_get_irq_type(struct aq_nic_s *self);
 
 #endif /* AQ_PCI_FUNC_H */
diff --git a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
index 9c7e916..f4418c7 100644
--- a/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
+++ b/drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c
@@ -369,8 +369,6 @@ int hw_atl_utils_get_mac_permanent(struct aq_hw_s *self,
 	u32 l = 0U;
 	u32 mac_addr[2];
 
-	self->mmio = aq_pci_func_get_mmio(self->aq_pci_func);
-
 	hw_atl_utils_hw_chip_features_init(self,
 					   &self->chip_features);
 
-- 
2.7.4

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