-From f43e3aaaacaaf0482f0aaa6fbad03572f3a0c614 Mon Sep 17 00:00:00 2001
+From 781eb70655d4f25af51aafcc010851918d49b2d7 Mon Sep 17 00:00:00 2001
From: John Crispin <blogic@openwrt.org>
Date: Wed, 23 Mar 2016 18:31:48 +0100
-Subject: [PATCH 88/91] net-next: mediatek: add support for IRQ grouping
+Subject: [PATCH 88/90] net-next: mediatek: add support for IRQ grouping
The ethernet core has 3 IRQs. using the IRQ grouping registers we are able
to separate TX and RX IRQs, which allows us to service them on separate
Signed-off-by: John Crispin <blogic@openwrt.org>
---
- drivers/net/ethernet/mediatek/mtk_eth_soc.c | 165 ++++++++++++++++++---------
+ drivers/net/ethernet/mediatek/mtk_eth_soc.c | 164 ++++++++++++++++++---------
drivers/net/ethernet/mediatek/mtk_eth_soc.h | 16 ++-
- 2 files changed, 125 insertions(+), 56 deletions(-)
+ 2 files changed, 124 insertions(+), 56 deletions(-)
diff --git a/drivers/net/ethernet/mediatek/mtk_eth_soc.c b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-index f821820..b5e364c 100644
+index f86d551..6557026 100644
--- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c
+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c
-@@ -789,7 +789,7 @@ drop:
+@@ -790,7 +790,7 @@ drop:
}
static int mtk_poll_rx(struct napi_struct *napi, int budget,
{
struct mtk_rx_ring *ring = ð->rx_ring;
int idx = ring->calc_idx;
-@@ -877,19 +877,18 @@ release_desc:
+@@ -878,19 +878,18 @@ release_desc:
}
if (done < budget)
u32 cpu, dma;
static int condition;
int i;
-@@ -941,64 +940,82 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
- continue;
- netdev_completed_queue(eth->netdev[i], done, bytes);
+@@ -944,63 +943,80 @@ static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again)
}
-+
+
/* read hw index again make sure no new tx packet */
- if (cpu != dma || cpu != mtk_r32(eth, MTK_QTX_DRX_PTR))
- *tx_again = true;
mtk_w32(eth, status_intr, MTK_INT_STATUS2);
}
+}
-+
+
+static int mtk_napi_tx(struct napi_struct *napi, int budget)
+{
+ struct mtk_eth *eth = container_of(napi, struct mtk_eth, tx_napi);
+
+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
+ tx_done = mtk_poll_tx(eth, budget);
-+ if (unlikely(netif_msg_intr(eth))) {
-+ mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
+ if (unlikely(netif_msg_intr(eth))) {
+ mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
+- netdev_info(eth->netdev[0],
+- "done tx %d, rx %d, intr 0x%08x/0x%x\n",
+- tx_done, rx_done, status, mask);
+ dev_info(eth->dev,
+ "done tx %d, intr 0x%08x/0x%x\n",
+ tx_done, status, mask);
-+ }
-+
+ }
+
+- if (tx_again || rx_done == budget)
+ if (tx_done == budget)
-+ return budget;
-+
-+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
+ return budget;
+
+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
+- if (status & (tx_intr | rx_intr))
+ if (status & MTK_TX_DONE_INT)
-+ return budget;
-+
-+ napi_complete(napi);
+ return budget;
+
+ napi_complete(napi);
+- mtk_irq_enable(eth, tx_intr | rx_intr);
+ mtk_irq_enable(eth, MTK_TX_DONE_INT);
+
+ return tx_done;
+ struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi);
+ u32 status, mask;
+ int rx_done = 0;
-
++
+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
+ rx_done = mtk_poll_rx(napi, budget, eth);
- if (unlikely(netif_msg_intr(eth))) {
- mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
-- netdev_info(eth->netdev[0],
-- "done tx %d, rx %d, intr 0x%08x/0x%x\n",
-- tx_done, rx_done, status, mask);
++ if (unlikely(netif_msg_intr(eth))) {
++ mask = mtk_r32(eth, MTK_QDMA_INT_MASK);
+ dev_info(eth->dev,
+ "done rx %d, intr 0x%08x/0x%x\n",
+ rx_done, status, mask);
- }
-
-- if (tx_again || rx_done == budget)
++ }
++
+ if (rx_done == budget)
- return budget;
-
- status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
-- if (status & (tx_intr | rx_intr))
++ return budget;
++
++ status = mtk_r32(eth, MTK_QMTK_INT_STATUS);
+ if (status & MTK_RX_DONE_INT)
- return budget;
-
- napi_complete(napi);
-- mtk_irq_enable(eth, tx_intr | rx_intr);
++ return budget;
++
++ napi_complete(napi);
+ mtk_irq_enable(eth, MTK_RX_DONE_INT);
return rx_done;
}
-@@ -1235,22 +1252,44 @@ static void mtk_tx_timeout(struct net_device *dev)
+@@ -1237,22 +1253,44 @@ static void mtk_tx_timeout(struct net_device *dev)
schedule_work(ð->pending_work);
}
- } else {
- mtk_w32(eth, status, MTK_QMTK_INT_STATUS);
+ mtk_irq_disable(eth, MTK_RX_DONE_INT);
- }
-- mtk_irq_disable(eth, (MTK_RX_DONE_INT | MTK_TX_DONE_INT));
++ }
+ mtk_w32(eth, status, MTK_QMTK_INT_STATUS);
+
+ return IRQ_HANDLED;
+ if (likely(napi_schedule_prep(ð->tx_napi)))
+ __napi_schedule(ð->tx_napi);
+ mtk_irq_disable(eth, MTK_TX_DONE_INT);
-+ }
+ }
+- mtk_irq_disable(eth, (MTK_RX_DONE_INT | MTK_TX_DONE_INT));
+ mtk_w32(eth, status, MTK_QMTK_INT_STATUS);
return IRQ_HANDLED;
}
-@@ -1263,7 +1302,7 @@ static void mtk_poll_controller(struct net_device *dev)
+@@ -1265,7 +1303,7 @@ static void mtk_poll_controller(struct net_device *dev)
u32 int_mask = MTK_TX_DONE_INT | MTK_RX_DONE_INT;
mtk_irq_disable(eth, int_mask);
mtk_irq_enable(eth, int_mask);
}
#endif
-@@ -1299,6 +1338,7 @@ static int mtk_open(struct net_device *dev)
+@@ -1301,6 +1339,7 @@ static int mtk_open(struct net_device *dev)
if (err)
return err;
napi_enable(ð->rx_napi);
mtk_irq_enable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT);
}
-@@ -1347,6 +1387,7 @@ static int mtk_stop(struct net_device *dev)
+@@ -1349,6 +1388,7 @@ static int mtk_stop(struct net_device *dev)
return 0;
mtk_irq_disable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT);
napi_disable(ð->rx_napi);
mtk_stop_dma(eth, MTK_QDMA_GLO_CFG);
-@@ -1384,7 +1425,11 @@ static int __init mtk_hw_init(struct mtk_eth *eth)
+@@ -1386,7 +1426,11 @@ static int __init mtk_hw_init(struct mtk_eth *eth)
/* Enable RX VLan Offloading */
mtk_w32(eth, 1, MTK_CDMP_EG_CTRL);
dev_name(eth->dev), eth);
if (err)
return err;
-@@ -1400,7 +1445,11 @@ static int __init mtk_hw_init(struct mtk_eth *eth)
+@@ -1402,7 +1446,11 @@ static int __init mtk_hw_init(struct mtk_eth *eth)
mtk_w32(eth, 0, MTK_RST_GL);
/* FE int grouping */
for (i = 0; i < 2; i++) {
u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i));
-@@ -1448,7 +1497,9 @@ static void mtk_uninit(struct net_device *dev)
+@@ -1450,7 +1498,9 @@ static void mtk_uninit(struct net_device *dev)
phy_disconnect(mac->phy_dev);
mtk_mdio_cleanup(eth);
mtk_irq_disable(eth, ~0);
}
static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd)
-@@ -1723,10 +1774,10 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
+@@ -1725,10 +1775,10 @@ static int mtk_add_mac(struct mtk_eth *eth, struct device_node *np)
dev_err(eth->dev, "error bringing up device\n");
goto free_netdev;
}
return 0;
-@@ -1743,6 +1794,7 @@ static int mtk_probe(struct platform_device *pdev)
+@@ -1745,6 +1795,7 @@ static int mtk_probe(struct platform_device *pdev)
struct mtk_soc_data *soc;
struct mtk_eth *eth;
int err;
match = of_match_device(of_mtk_match, &pdev->dev);
soc = (struct mtk_soc_data *)match->data;
-@@ -1778,10 +1830,12 @@ static int mtk_probe(struct platform_device *pdev)
+@@ -1780,10 +1831,12 @@ static int mtk_probe(struct platform_device *pdev)
return PTR_ERR(eth->rstc);
}
}
eth->clk_ethif = devm_clk_get(&pdev->dev, "ethif");
-@@ -1822,7 +1876,9 @@ static int mtk_probe(struct platform_device *pdev)
+@@ -1824,7 +1877,9 @@ static int mtk_probe(struct platform_device *pdev)
* for NAPI to work
*/
init_dummy_netdev(ð->dummy_dev);
MTK_NAPI_WEIGHT);
platform_set_drvdata(pdev, eth);
-@@ -1843,6 +1899,7 @@ static int mtk_remove(struct platform_device *pdev)
+@@ -1845,6 +1900,7 @@ static int mtk_remove(struct platform_device *pdev)
clk_disable_unprepare(eth->clk_gp1);
clk_disable_unprepare(eth->clk_gp2);
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