diff options
Diffstat (limited to 'target/linux/mediatek/patches-4.4/0096-net-next-mediatek-add-support-for-IRQ-grouping.patch')
| -rw-r--r-- | target/linux/mediatek/patches-4.4/0096-net-next-mediatek-add-support-for-IRQ-grouping.patch | 361 |
1 files changed, 0 insertions, 361 deletions
diff --git a/target/linux/mediatek/patches-4.4/0096-net-next-mediatek-add-support-for-IRQ-grouping.patch b/target/linux/mediatek/patches-4.4/0096-net-next-mediatek-add-support-for-IRQ-grouping.patch deleted file mode 100644 index 727073e..0000000 --- a/target/linux/mediatek/patches-4.4/0096-net-next-mediatek-add-support-for-IRQ-grouping.patch +++ /dev/null @@ -1,361 +0,0 @@ -From 190df1a9dbf4d8809b7f991194ce60e47f2290a2 Mon Sep 17 00:00:00 2001 -From: John Crispin <john@phrozen.org> -Date: Wed, 23 Mar 2016 18:31:48 +0100 -Subject: [PATCH 096/102] 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 -cores. This patch splits the irq handler into 2 separate functions, one for -TX and another for RX. The TX housekeeping is split out into its own NAPI -handler. - -Signed-off-by: John Crispin <john@phrozen.org> ---- - drivers/net/ethernet/mediatek/mtk_eth_soc.c | 156 +++++++++++++++++---------- - drivers/net/ethernet/mediatek/mtk_eth_soc.h | 15 ++- - 2 files changed, 111 insertions(+), 60 deletions(-) - ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.c -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.c -@@ -905,14 +905,13 @@ release_desc: - return done; - } - --static int mtk_poll_tx(struct mtk_eth *eth, int budget, bool *tx_again) -+static int mtk_poll_tx(struct mtk_eth *eth, int budget) - { - struct mtk_tx_ring *ring = ð->tx_ring; - struct mtk_tx_dma *desc; - struct sk_buff *skb; - struct mtk_tx_buf *tx_buf; -- int total = 0, done = 0; -- unsigned int bytes = 0; -+ unsigned int bytes = 0, done = 0; - u32 cpu, dma; - static int condition; - int i; -@@ -964,63 +963,82 @@ static int mtk_poll_tx(struct mtk_eth *e - netdev_completed_queue(eth->netdev[i], done, bytes); - } - -- /* read hw index again make sure no new tx packet */ -- if (cpu != dma || cpu != mtk_r32(eth, MTK_QTX_DRX_PTR)) -- *tx_again = true; -- else -- mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS); -- -- if (!total) -- return 0; -- - if (mtk_queue_stopped(eth) && - (atomic_read(&ring->free_count) > ring->thresh)) - mtk_wake_queue(eth); - -- return total; -+ return done; - } - --static int mtk_poll(struct napi_struct *napi, int budget) -+static void mtk_handle_status_irq(struct mtk_eth *eth) - { -- struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); -- u32 status, status2, mask; -- int tx_done, rx_done; -- bool tx_again = false; -- -- status = mtk_r32(eth, MTK_QMTK_INT_STATUS); -- status2 = mtk_r32(eth, MTK_INT_STATUS2); -- tx_done = 0; -- rx_done = 0; -- tx_again = 0; -- -- if (status & MTK_TX_DONE_INT) -- tx_done = mtk_poll_tx(eth, budget, &tx_again); -- -- if (status & MTK_RX_DONE_INT) -- rx_done = mtk_poll_rx(napi, budget, eth); -+ u32 status2 = mtk_r32(eth, MTK_INT_STATUS2); - - if (unlikely(status2 & (MTK_GDM1_AF | MTK_GDM2_AF))) { - mtk_stats_update(eth); - mtk_w32(eth, (MTK_GDM1_AF | MTK_GDM2_AF), - 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); -+ u32 status, mask; -+ int tx_done = 0; -+ -+ mtk_handle_status_irq(eth); -+ mtk_w32(eth, MTK_TX_DONE_INT, MTK_QMTK_INT_STATUS); -+ tx_done = mtk_poll_tx(eth, budget); - - if (unlikely(netif_msg_intr(eth))) { -+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS); - 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); -- if (status & (tx_intr | rx_intr)) -+ if (status & MTK_TX_DONE_INT) - return budget; - - napi_complete(napi); -- mtk_irq_enable(eth, MTK_RX_DONE_INT | MTK_RX_DONE_INT); -+ mtk_irq_enable(eth, MTK_TX_DONE_INT); -+ -+ return tx_done; -+} -+ -+static int mtk_napi_rx(struct napi_struct *napi, int budget) -+{ -+ struct mtk_eth *eth = container_of(napi, struct mtk_eth, rx_napi); -+ u32 status, mask; -+ int rx_done = 0; -+ -+ mtk_handle_status_irq(eth); -+ mtk_w32(eth, MTK_RX_DONE_INT, MTK_QMTK_INT_STATUS); -+ rx_done = mtk_poll_rx(napi, budget, eth); -+ -+ if (unlikely(netif_msg_intr(eth))) { -+ status = mtk_r32(eth, MTK_QMTK_INT_STATUS); -+ 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 (rx_done == budget) -+ 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, MTK_RX_DONE_INT); - - return rx_done; - } -@@ -1256,22 +1274,26 @@ static void mtk_tx_timeout(struct net_de - schedule_work(ð->pending_work); - } - --static irqreturn_t mtk_handle_irq(int irq, void *_eth) -+static irqreturn_t mtk_handle_irq_rx(int irq, void *_eth) - { - struct mtk_eth *eth = _eth; -- u32 status; - -- status = mtk_r32(eth, MTK_QMTK_INT_STATUS); -- if (unlikely(!status)) -- return IRQ_NONE; -+ if (likely(napi_schedule_prep(ð->rx_napi))) { -+ __napi_schedule(ð->rx_napi); -+ mtk_irq_disable(eth, MTK_RX_DONE_INT); -+ } - -- if (likely(status & (MTK_RX_DONE_INT | MTK_TX_DONE_INT))) { -- if (likely(napi_schedule_prep(ð->rx_napi))) -- __napi_schedule(ð->rx_napi); -- } else { -- mtk_w32(eth, status, MTK_QMTK_INT_STATUS); -+ return IRQ_HANDLED; -+} -+ -+static irqreturn_t mtk_handle_irq_tx(int irq, void *_eth) -+{ -+ struct mtk_eth *eth = _eth; -+ -+ 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)); - - return IRQ_HANDLED; - } -@@ -1284,7 +1306,7 @@ static void mtk_poll_controller(struct n - u32 int_mask = MTK_TX_DONE_INT | MTK_RX_DONE_INT; - - mtk_irq_disable(eth, int_mask); -- mtk_handle_irq(dev->irq, dev); -+ mtk_handle_irq(dev->irq[0], dev); - mtk_irq_enable(eth, int_mask); - } - #endif -@@ -1320,6 +1342,7 @@ static int mtk_open(struct net_device *d - if (err) - return err; - -+ napi_enable(ð->tx_napi); - napi_enable(ð->rx_napi); - mtk_irq_enable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT); - } -@@ -1368,6 +1391,7 @@ static int mtk_stop(struct net_device *d - return 0; - - mtk_irq_disable(eth, MTK_TX_DONE_INT | MTK_RX_DONE_INT); -+ napi_disable(ð->tx_napi); - napi_disable(ð->rx_napi); - - mtk_stop_dma(eth, MTK_QDMA_GLO_CFG); -@@ -1405,7 +1429,11 @@ static int __init mtk_hw_init(struct mtk - /* Enable RX VLan Offloading */ - mtk_w32(eth, 1, MTK_CDMP_EG_CTRL); - -- err = devm_request_irq(eth->dev, eth->irq, mtk_handle_irq, 0, -+ err = devm_request_irq(eth->dev, eth->irq[1], mtk_handle_irq_tx, 0, -+ dev_name(eth->dev), eth); -+ if (err) -+ return err; -+ err = devm_request_irq(eth->dev, eth->irq[2], mtk_handle_irq_rx, 0, - dev_name(eth->dev), eth); - if (err) - return err; -@@ -1421,7 +1449,11 @@ static int __init mtk_hw_init(struct mtk - mtk_w32(eth, 0, MTK_RST_GL); - - /* FE int grouping */ -- mtk_w32(eth, 0, MTK_FE_INT_GRP); -+ mtk_w32(eth, MTK_TX_DONE_INT, MTK_PDMA_INT_GRP1); -+ mtk_w32(eth, MTK_RX_DONE_INT, MTK_PDMA_INT_GRP2); -+ mtk_w32(eth, MTK_TX_DONE_INT, MTK_QDMA_INT_GRP1); -+ mtk_w32(eth, MTK_RX_DONE_INT, MTK_QDMA_INT_GRP2); -+ mtk_w32(eth, 0x21021000, MTK_FE_INT_GRP); - - for (i = 0; i < 2; i++) { - u32 val = mtk_r32(eth, MTK_GDMA_FWD_CFG(i)); -@@ -1469,7 +1501,9 @@ static void mtk_uninit(struct net_device - phy_disconnect(mac->phy_dev); - mtk_mdio_cleanup(eth); - mtk_irq_disable(eth, ~0); -- free_irq(dev->irq, dev); -+ free_irq(eth->irq[0], dev); -+ free_irq(eth->irq[1], dev); -+ free_irq(eth->irq[2], dev); - } - - static int mtk_do_ioctl(struct net_device *dev, struct ifreq *ifr, int cmd) -@@ -1744,10 +1778,10 @@ static int mtk_add_mac(struct mtk_eth *e - dev_err(eth->dev, "error bringing up device\n"); - goto free_netdev; - } -- eth->netdev[id]->irq = eth->irq; -+ eth->netdev[id]->irq = eth->irq[0]; - netif_info(eth, probe, eth->netdev[id], - "mediatek frame engine at 0x%08lx, irq %d\n", -- eth->netdev[id]->base_addr, eth->netdev[id]->irq); -+ eth->netdev[id]->base_addr, eth->irq[0]); - - return 0; - -@@ -1764,6 +1798,7 @@ static int mtk_probe(struct platform_dev - struct mtk_soc_data *soc; - struct mtk_eth *eth; - int err; -+ int i; - - match = of_match_device(of_mtk_match, &pdev->dev); - soc = (struct mtk_soc_data *)match->data; -@@ -1799,10 +1834,12 @@ static int mtk_probe(struct platform_dev - return PTR_ERR(eth->rstc); - } - -- eth->irq = platform_get_irq(pdev, 0); -- if (eth->irq < 0) { -- dev_err(&pdev->dev, "no IRQ resource found\n"); -- return -ENXIO; -+ for (i = 0; i < 3; i++) { -+ eth->irq[i] = platform_get_irq(pdev, i); -+ if (eth->irq[i] < 0) { -+ dev_err(&pdev->dev, "no IRQ%d resource found\n", i); -+ return -ENXIO; -+ } - } - - eth->clk_ethif = devm_clk_get(&pdev->dev, "ethif"); -@@ -1843,7 +1880,9 @@ static int mtk_probe(struct platform_dev - * for NAPI to work - */ - init_dummy_netdev(ð->dummy_dev); -- netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_poll, -+ netif_napi_add(ð->dummy_dev, ð->tx_napi, mtk_napi_tx, -+ MTK_NAPI_WEIGHT); -+ netif_napi_add(ð->dummy_dev, ð->rx_napi, mtk_napi_rx, - MTK_NAPI_WEIGHT); - - platform_set_drvdata(pdev, eth); -@@ -1864,6 +1903,7 @@ static int mtk_remove(struct platform_de - clk_disable_unprepare(eth->clk_gp1); - clk_disable_unprepare(eth->clk_gp2); - -+ netif_napi_del(ð->tx_napi); - netif_napi_del(ð->rx_napi); - mtk_cleanup(eth); - platform_set_drvdata(pdev, NULL); ---- a/drivers/net/ethernet/mediatek/mtk_eth_soc.h -+++ b/drivers/net/ethernet/mediatek/mtk_eth_soc.h -@@ -68,6 +68,10 @@ - /* Unicast Filter MAC Address Register - High */ - #define MTK_GDMA_MAC_ADRH(x) (0x50C + (x * 0x1000)) - -+/* PDMA Interrupt grouping registers */ -+#define MTK_PDMA_INT_GRP1 0xa50 -+#define MTK_PDMA_INT_GRP2 0xa54 -+ - /* QDMA TX Queue Configuration Registers */ - #define MTK_QTX_CFG(x) (0x1800 + (x * 0x10)) - #define QDMA_RES_THRES 4 -@@ -125,6 +129,11 @@ - #define MTK_TX_DONE_INT (MTK_TX_DONE_INT0 | MTK_TX_DONE_INT1 | \ - MTK_TX_DONE_INT2 | MTK_TX_DONE_INT3) - -+/* QDMA Interrupt grouping registers */ -+#define MTK_QDMA_INT_GRP1 0x1a20 -+#define MTK_QDMA_INT_GRP2 0x1a24 -+#define MTK_RLS_DONE_INT BIT(0) -+ - /* QDMA Interrupt Status Register */ - #define MTK_QDMA_INT_MASK 0x1A1C - -@@ -356,7 +365,8 @@ struct mtk_rx_ring { - * @dma_refcnt: track how many netdevs are using the DMA engine - * @tx_ring: Pointer to the memore holding info about the TX ring - * @rx_ring: Pointer to the memore holding info about the RX ring -- * @rx_napi: The NAPI struct -+ * @tx_napi: The TX NAPI struct -+ * @rx_napi: The RX NAPI struct - * @scratch_ring: Newer SoCs need memory for a second HW managed TX ring - * @phy_scratch_ring: physical address of scratch_ring - * @scratch_head: The scratch memory that scratch_ring points to. -@@ -377,7 +387,7 @@ struct mtk_eth { - struct net_device dummy_dev; - struct net_device *netdev[MTK_MAX_DEVS]; - struct mtk_mac *mac[MTK_MAX_DEVS]; -- int irq; -+ int irq[3]; - u32 msg_enable; - unsigned long sysclk; - struct regmap *ethsys; -@@ -385,6 +395,7 @@ struct mtk_eth { - atomic_t dma_refcnt; - struct mtk_tx_ring tx_ring; - struct mtk_rx_ring rx_ring; -+ struct napi_struct tx_napi; - struct napi_struct rx_napi; - struct mtk_tx_dma *scratch_ring; - dma_addr_t phy_scratch_ring; |