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lantiq: make xrx200 network driver use a tasklet for rx housekeeping

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Signed-off-by: John Crispin <blogic@openwrt.org>

SVN-Revision: 37085
This commit is contained in:
John Crispin 2013-06-29 16:33:28 +00:00
parent aff84655f5
commit b4f36358ff
1 changed files with 40 additions and 32 deletions
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64
target/linux/lantiq/patches-3.8/0025-NET-MIPS-lantiq-adds-xrx200-net.patch
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@ -12,9 +12,11 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
create mode 100644 drivers/net/ethernet/lantiq_pce.h
create mode 100644 drivers/net/ethernet/lantiq_xrx200.c
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -83,7 +83,13 @@ config LANTIQ_ETOP
Index: linux-3.8.13/drivers/net/ethernet/Kconfig
===================================================================
--- linux-3.8.13.orig/drivers/net/ethernet/Kconfig 2013-05-11 22:57:46.000000000 +0200
+++ linux-3.8.13/drivers/net/ethernet/Kconfig 2013-06-28 17:46:34.521054618 +0200
@@ -83,7 +83,13 @@
tristate "Lantiq SoC ETOP driver"
depends on SOC_TYPE_XWAY
---help---
@ -29,9 +31,11 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
source "drivers/net/ethernet/marvell/Kconfig"
source "drivers/net/ethernet/mellanox/Kconfig"
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -36,6 +36,7 @@ obj-$(CONFIG_IP1000) += icplus/
Index: linux-3.8.13/drivers/net/ethernet/Makefile
===================================================================
--- linux-3.8.13.orig/drivers/net/ethernet/Makefile 2013-05-11 22:57:46.000000000 +0200
+++ linux-3.8.13/drivers/net/ethernet/Makefile 2013-06-28 17:46:34.521054618 +0200
@@ -36,6 +36,7 @@
obj-$(CONFIG_JME) += jme.o
obj-$(CONFIG_KORINA) += korina.o
obj-$(CONFIG_LANTIQ_ETOP) += lantiq_etop.o
@ -39,8 +43,10 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
obj-$(CONFIG_NET_VENDOR_MARVELL) += marvell/
obj-$(CONFIG_NET_VENDOR_MELLANOX) += mellanox/
obj-$(CONFIG_NET_VENDOR_MICREL) += micrel/
--- /dev/null
+++ b/drivers/net/ethernet/lantiq_pce.h
Index: linux-3.8.13/drivers/net/ethernet/lantiq_pce.h
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.8.13/drivers/net/ethernet/lantiq_pce.h 2013-06-28 17:46:34.525054619 +0200
@@ -0,0 +1,163 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
@ -205,8 +211,10 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ MC_ENTRY(0x0000, 0x0000, 39, OUT_NONE, 0, INSTR, FLAG_END, 0),
+ MC_ENTRY(0x0000, 0x0000, 39, OUT_NONE, 0, INSTR, FLAG_END, 0),
+};
--- /dev/null
+++ b/drivers/net/ethernet/lantiq_xrx200.c
Index: linux-3.8.13/drivers/net/ethernet/lantiq_xrx200.c
===================================================================
--- /dev/null 1970-01-01 00:00:00.000000000 +0000
+++ linux-3.8.13/drivers/net/ethernet/lantiq_xrx200.c 2013-06-29 18:09:53.932157475 +0200
@@ -0,0 +1,1203 @@
+/*
+ * This program is free software; you can redistribute it and/or modify it
@ -273,6 +281,8 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+#define XRX200_DMA_IRQ INT_NUM_IM2_IRL0
+#define XRX200_DMA_RX 0
+#define XRX200_DMA_TX 1
+#define XRX200_DMA_IS_TX(x) (x%2)
+#define XRX200_DMA_IS_RX(x) (!XRX200_DMA_IS_TX(x))
+
+/* fetch / store dma */
+#define FDMA_PCTRL0 0x2A00
@ -414,6 +424,7 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ struct net_device dummy_dev;
+ struct net_device *devs[XRX200_MAX_DEV];
+
+ struct tasklet_struct tasklet;
+ struct napi_struct napi;
+ struct ltq_dma_channel dma;
+ struct sk_buff *skb[LTQ_DESC_NUM];
@ -483,6 +494,7 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ continue;
+ spin_lock_irqsave(&priv->hw->lock, flags);
+ if (!priv->hw->chan[i].refcount) {
+ if (XRX200_DMA_IS_RX(i))
+ napi_enable(&priv->hw->chan[i].napi);
+ ltq_dma_open(&priv->hw->chan[i].dma);
+ }
@ -515,6 +527,7 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ spin_lock_irqsave(&priv->hw->lock, flags);
+ priv->hw->chan[i].refcount--;
+ if (!priv->hw->chan[i].refcount) {
+ if (XRX200_DMA_IS_RX(i))
+ napi_disable(&priv->hw->chan[i].napi);
+ ltq_dma_close(&priv->hw->chan[XRX200_DMA_RX].dma);
+ }
@ -610,17 +623,15 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ return rx;
+}
+
+static int xrx200_poll_tx(struct napi_struct *napi, int budget)
+static void xrx200_tx_housekeeping(unsigned long ptr)
+{
+ struct xrx200_chan *ch =
+ container_of(napi, struct xrx200_chan, napi);
+ struct xrx200_priv *priv = netdev_priv(ch->devs[0]);
+ struct xrx200_hw *hw = (struct xrx200_hw *) ptr;
+ struct xrx200_chan *ch = &hw->chan[XRX200_DMA_TX];
+ unsigned long flags;
+ int i;
+
+ spin_lock_irqsave(&priv->hw->lock, flags);
+ while ((ch->dma.desc_base[ch->tx_free].ctl &
+ (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
+ spin_lock_irqsave(&hw->lock, flags);
+ while ((ch->dma.desc_base[ch->tx_free].ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) == LTQ_DMA_C) {
+ dev_kfree_skb_any(ch->skb[ch->tx_free]);
+ ch->skb[ch->tx_free] = NULL;
+ memset(&ch->dma.desc_base[ch->tx_free], 0,
@ -628,7 +639,7 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ ch->tx_free++;
+ ch->tx_free %= LTQ_DESC_NUM;
+ }
+ spin_unlock_irqrestore(&priv->hw->lock, flags);
+ spin_unlock_irqrestore(&hw->lock, flags);
+
+ for (i = 0; i < XRX200_MAX_DEV && ch->devs[i]; i++) {
+ struct netdev_queue *txq =
@ -636,12 +647,10 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ if (netif_tx_queue_stopped(txq))
+ netif_tx_start_queue(txq);
+ }
+ napi_complete(&ch->napi);
+ spin_lock_irqsave(&priv->hw->lock, flags);
+ ltq_dma_ack_irq(&ch->dma);
+ spin_unlock_irqrestore(&priv->hw->lock, flags);
+
+ return 1;
+ spin_lock_irqsave(&hw->lock, flags);
+ ltq_dma_ack_irq(&ch->dma);
+ spin_unlock_irqrestore(&hw->lock, flags);
+}
+
+static struct net_device_stats *xrx200_get_stats (struct net_device *dev)
@ -733,6 +742,9 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ struct xrx200_hw *hw = priv;
+ int ch = irq - XRX200_DMA_IRQ;
+
+ if (ch % 2)
+ tasklet_schedule(&hw->chan[ch].tasklet);
+ else
+ napi_schedule(&hw->chan[ch].napi);
+
+ return IRQ_HANDLED;
@ -1173,7 +1185,6 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+
+static int xrx200_of_mdio(struct xrx200_hw *hw, struct device_node *np)
+{
+ int i;
+ hw->mii_bus = mdiobus_alloc();
+ if (!hw->mii_bus)
+ return -ENOMEM;
@ -1319,6 +1330,7 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ spin_lock_init(&xrx200_hw.lock);
+ xrx200_dma_init(&xrx200_hw);
+ xrx200_hw_init(&xrx200_hw);
+ tasklet_init(&xrx200_hw.chan[XRX200_DMA_TX].tasklet, xrx200_tx_housekeeping, (u32) &xrx200_hw);
+
+ /* bring up the mdio bus */
+ mdio_np = of_find_compatible_node(pdev->dev.of_node, NULL,
@ -1354,11 +1366,8 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+
+ /* setup NAPI */
+ init_dummy_netdev(&xrx200_hw.chan[XRX200_DMA_RX].dummy_dev);
+ init_dummy_netdev(&xrx200_hw.chan[XRX200_DMA_TX].dummy_dev);
+ netif_napi_add(&xrx200_hw.chan[XRX200_DMA_RX].dummy_dev,
+ &xrx200_hw.chan[XRX200_DMA_RX].napi, xrx200_poll_rx, 32);
+ netif_napi_add(&xrx200_hw.chan[XRX200_DMA_TX].dummy_dev,
+ &xrx200_hw.chan[XRX200_DMA_TX].napi, xrx200_poll_tx, 8);
+
+ platform_set_drvdata(pdev, &xrx200_hw);
+
@ -1378,7 +1387,6 @@ Subject: [PATCH 25/40] NET: MIPS: lantiq: adds xrx200-net
+ /* free stack related instances */
+ netif_stop_queue(dev);
+ netif_napi_del(&xrx200_hw.chan[XRX200_DMA_RX].napi);
+ netif_napi_del(&xrx200_hw.chan[XRX200_DMA_TX].napi);
+
+ /* shut down hardware */
+ xrx200_hw_cleanup(&xrx200_hw);