linux-kernel - [PATCH v3 net-next 09/15] net: sgi: ioc3-eth: split ring cleaning/freeing and allocation

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Date:   Fri, 30 Aug 2019 11:25:32 +0200
From:   Thomas Bogendoerfer <tbogendoerfer@...e.de>
To:     Ralf Baechle <ralf@...ux-mips.org>,
        Paul Burton <paul.burton@...s.com>,
        James Hogan <jhogan@...nel.org>,
        "David S. Miller" <davem@...emloft.net>,
        linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
        netdev@...r.kernel.org
Subject: [PATCH v3 net-next 09/15] net: sgi: ioc3-eth: split ring cleaning/freeing and allocation

Do tx ring cleaning and freeing of rx buffers, when chip is shutdown and
allocate buffers before bringing chip up.

Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@...e.de>
---
 drivers/net/ethernet/sgi/ioc3-eth.c | 28 +++++++++++++---------------
 1 file changed, 13 insertions(+), 15 deletions(-)

diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index d32d245dcf18..fe8ee8f1c71f 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -108,6 +108,9 @@ static inline unsigned int ioc3_hash(const unsigned char *addr);
 static void ioc3_start(struct ioc3_private *ip);
 static inline void ioc3_stop(struct ioc3_private *ip);
 static void ioc3_init(struct net_device *dev);
+static void ioc3_alloc_rx_bufs(struct net_device *dev);
+static void ioc3_free_rx_bufs(struct ioc3_private *ip);
+static inline void ioc3_clean_tx_ring(struct ioc3_private *ip);
 
 static const char ioc3_str[] = "IOC3 Ethernet";
 static const struct ethtool_ops ioc3_ethtool_ops;
@@ -660,7 +663,11 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
 		net_err_ratelimited("%s: TX PCI error.\n", dev->name);
 
 	ioc3_stop(ip);
+	ioc3_free_rx_bufs(ip);
+	ioc3_clean_tx_ring(ip);
+
 	ioc3_init(dev);
+	ioc3_alloc_rx_bufs(dev);
 	ioc3_start(ip);
 	ioc3_mii_init(ip);
 
@@ -826,16 +833,6 @@ static void ioc3_alloc_rx_bufs(struct net_device *dev)
 	ip->rx_pi = RX_BUFFS;
 }
 
-static void ioc3_init_rings(struct net_device *dev)
-{
-	struct ioc3_private *ip = netdev_priv(dev);
-
-	ioc3_free_rx_bufs(ip);
-	ioc3_alloc_rx_bufs(dev);
-
-	ioc3_clean_tx_ring(ip);
-}
-
 static inline void ioc3_ssram_disc(struct ioc3_private *ip)
 {
 	struct ioc3_ethregs *regs = ip->regs;
@@ -888,8 +885,6 @@ static void ioc3_init(struct net_device *dev)
 	writel(ip->ehar_h, &regs->ehar_h);
 	writel(ip->ehar_l, &regs->ehar_l);
 	writel(42, &regs->ersr);		/* XXX should be random */
-
-	ioc3_init_rings(dev);
 }
 
 static void ioc3_start(struct ioc3_private *ip)
@@ -945,7 +940,9 @@ static int ioc3_open(struct net_device *dev)
 
 	ip->ehar_h = 0;
 	ip->ehar_l = 0;
+
 	ioc3_init(dev);
+	ioc3_alloc_rx_bufs(dev);
 	ioc3_start(ip);
 	ioc3_mii_start(ip);
 
@@ -1215,7 +1212,6 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	}
 
 	ioc3_init(dev);
-	ioc3_start(ip);
 
 	ip->pdev = pdev;
 
@@ -1266,9 +1262,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 	return 0;
 
 out_stop:
-	ioc3_stop(ip);
 	del_timer_sync(&ip->ioc3_timer);
-	ioc3_free_rx_bufs(ip);
 	if (ip->rxr)
 		free_page((unsigned long)ip->rxr);
 	if (ip->txr)
@@ -1437,7 +1431,11 @@ static void ioc3_timeout(struct net_device *dev)
 	spin_lock_irq(&ip->ioc3_lock);
 
 	ioc3_stop(ip);
+	ioc3_free_rx_bufs(ip);
+	ioc3_clean_tx_ring(ip);
+
 	ioc3_init(dev);
+	ioc3_alloc_rx_bufs(dev);
 	ioc3_start(ip);
 	ioc3_mii_init(ip);
 	ioc3_mii_start(ip);
-- 
2.13.7