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authorThomas Bogendoerfer <tbogendoerfer@suse.de>2019-08-30 11:25:31 +0200
committerDavid S. Miller <davem@davemloft.net>2019-08-30 13:54:35 -0700
commitfcd0da5a6d8784aba38916cdba86abd83694bc73 (patch)
treee2b6118f7e9384f199d6112f8ed4f6aab7f05a38 /drivers/net/ethernet/sgi
parentnet: sgi: ioc3-eth: separate tx and rx ring handling (diff)
downloadlinux-dev-fcd0da5a6d8784aba38916cdba86abd83694bc73.tar.xz
linux-dev-fcd0da5a6d8784aba38916cdba86abd83694bc73.zip
net: sgi: ioc3-eth: introduce chip start function
ioc3_init did everything from reset to init rings to starting the chip. This change move out chip start into a new function as preparation for easier handling of receive buffer allocation failures. Signed-off-by: Thomas Bogendoerfer <tbogendoerfer@suse.de> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/ethernet/sgi')
-rw-r--r--drivers/net/ethernet/sgi/ioc3-eth.c49
1 files changed, 29 insertions, 20 deletions
diff --git a/drivers/net/ethernet/sgi/ioc3-eth.c b/drivers/net/ethernet/sgi/ioc3-eth.c
index 29b9e5098052..d32d245dcf18 100644
--- a/drivers/net/ethernet/sgi/ioc3-eth.c
+++ b/drivers/net/ethernet/sgi/ioc3-eth.c
@@ -105,6 +105,7 @@ static void ioc3_set_multicast_list(struct net_device *dev);
static netdev_tx_t ioc3_start_xmit(struct sk_buff *skb, struct net_device *dev);
static void ioc3_timeout(struct net_device *dev);
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);
@@ -660,6 +661,7 @@ static void ioc3_error(struct net_device *dev, u32 eisr)
ioc3_stop(ip);
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_init(ip);
netif_wake_queue(dev);
@@ -827,31 +829,11 @@ static void ioc3_alloc_rx_bufs(struct net_device *dev)
static void ioc3_init_rings(struct net_device *dev)
{
struct ioc3_private *ip = netdev_priv(dev);
- struct ioc3_ethregs *regs = ip->regs;
- unsigned long ring;
ioc3_free_rx_bufs(ip);
ioc3_alloc_rx_bufs(dev);
ioc3_clean_tx_ring(ip);
-
- /* Now the rx ring base, consume & produce registers. */
- ring = ioc3_map(ip->rxr, 0);
- writel(ring >> 32, &regs->erbr_h);
- writel(ring & 0xffffffff, &regs->erbr_l);
- writel(ip->rx_ci << 3, &regs->ercir);
- writel((ip->rx_pi << 3) | ERPIR_ARM, &regs->erpir);
-
- ring = ioc3_map(ip->txr, 0);
-
- ip->txqlen = 0; /* nothing queued */
-
- /* Now the tx ring base, consume & produce registers. */
- writel(ring >> 32, &regs->etbr_h);
- writel(ring & 0xffffffff, &regs->etbr_l);
- writel(ip->tx_pi << 7, &regs->etpir);
- writel(ip->tx_ci << 7, &regs->etcir);
- readl(&regs->etcir); /* Flush */
}
static inline void ioc3_ssram_disc(struct ioc3_private *ip)
@@ -908,6 +890,30 @@ static void ioc3_init(struct net_device *dev)
writel(42, &regs->ersr); /* XXX should be random */
ioc3_init_rings(dev);
+}
+
+static void ioc3_start(struct ioc3_private *ip)
+{
+ struct ioc3_ethregs *regs = ip->regs;
+ unsigned long ring;
+
+ /* Now the rx ring base, consume & produce registers. */
+ ring = ioc3_map(ip->rxr, 0);
+ writel(ring >> 32, &regs->erbr_h);
+ writel(ring & 0xffffffff, &regs->erbr_l);
+ writel(ip->rx_ci << 3, &regs->ercir);
+ writel((ip->rx_pi << 3) | ERPIR_ARM, &regs->erpir);
+
+ ring = ioc3_map(ip->txr, 0);
+
+ ip->txqlen = 0; /* nothing queued */
+
+ /* Now the tx ring base, consume & produce registers. */
+ writel(ring >> 32, &regs->etbr_h);
+ writel(ring & 0xffffffff, &regs->etbr_l);
+ writel(ip->tx_pi << 7, &regs->etpir);
+ writel(ip->tx_ci << 7, &regs->etcir);
+ readl(&regs->etcir); /* Flush */
ip->emcr |= ((RX_OFFSET / 2) << EMCR_RXOFF_SHIFT) | EMCR_TXDMAEN |
EMCR_TXEN | EMCR_RXDMAEN | EMCR_RXEN | EMCR_PADEN;
@@ -940,6 +946,7 @@ static int ioc3_open(struct net_device *dev)
ip->ehar_h = 0;
ip->ehar_l = 0;
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_start(ip);
netif_start_queue(dev);
@@ -1208,6 +1215,7 @@ static int ioc3_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
}
ioc3_init(dev);
+ ioc3_start(ip);
ip->pdev = pdev;
@@ -1430,6 +1438,7 @@ static void ioc3_timeout(struct net_device *dev)
ioc3_stop(ip);
ioc3_init(dev);
+ ioc3_start(ip);
ioc3_mii_init(ip);
ioc3_mii_start(ip);