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| author | Felix Fietkau <nbd@openwrt.org> | 2011-08-13 22:30:14 +0000 |
|---|---|---|
| committer | Felix Fietkau <nbd@openwrt.org> | 2011-08-13 22:30:14 +0000 |
| commit | 12c84f8eebfa3a336c70c7fb5068ec24bcbda79b (patch) | |
| tree | 2c0e15d27ba14233670a8276c0f703938c282196 /target | |
| parent | 85ccc74e1b939e567e4d013b6ef3a25097e81bf0 (diff) | |
| download | upstream-12c84f8eebfa3a336c70c7fb5068ec24bcbda79b.tar.gz upstream-12c84f8eebfa3a336c70c7fb5068ec24bcbda79b.tar.bz2 upstream-12c84f8eebfa3a336c70c7fb5068ec24bcbda79b.zip | |
ar71xx: add some code to detect DMA stuck conditions on ar7240
SVN-Revision: 27975
Diffstat (limited to 'target')
4 files changed, 36 insertions, 1 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c index 088d27a346..74d9495c30 100644 --- a/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c +++ b/target/linux/ar71xx/files/arch/mips/ar71xx/devices.c @@ -589,6 +589,8 @@ void __init ar71xx_add_device_eth(unsigned int id) pdata->set_pll = id ? ar724x_set_pll_ge1 : ar724x_set_pll_ge0; pdata->is_ar724x = 1; + if (ar71xx_soc == AR71XX_SOC_AR7240) + pdata->is_ar7240 = 1; if (!pdata->fifo_cfg1) pdata->fifo_cfg1 = 0x0010ffff; diff --git a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h index b0eb22840c..0d9b5d2345 100644 --- a/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h +++ b/target/linux/ar71xx/files/arch/mips/include/asm/mach-ar71xx/platform.h @@ -29,6 +29,7 @@ struct ag71xx_platform_data { u8 has_gbit:1; u8 is_ar91xx:1; + u8 is_ar7240:1; u8 is_ar724x:1; u8 has_ar8216:1; u8 has_ar7240_switch:1; diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h index d5cc46c42a..0222cab797 100644 --- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h +++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx.h @@ -236,6 +236,10 @@ static inline int ag71xx_desc_pktlen(struct ag71xx_desc *desc) #define AG71XX_REG_INT_ENABLE 0x0198 #define AG71XX_REG_INT_STATUS 0x019c +#define AG71XX_REG_FIFO_DEPTH 0x01a8 +#define AG71XX_REG_RX_SM 0x01b0 +#define AG71XX_REG_TX_SM 0x01b4 + #define MAC_CFG1_TXE BIT(0) /* Tx Enable */ #define MAC_CFG1_STX BIT(1) /* Synchronize Tx Enable */ #define MAC_CFG1_RXE BIT(2) /* Rx Enable */ diff --git a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c index ee76c9a03d..c541933cec 100644 --- a/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c +++ b/target/linux/ar71xx/files/drivers/net/ag71xx/ag71xx_main.c @@ -805,9 +805,33 @@ static void ag71xx_restart_work_func(struct work_struct *work) ag71xx_open(ag->dev); } +static bool ag71xx_check_dma_stuck(struct ag71xx *ag, unsigned long timestamp) +{ + u32 rx_sm, tx_sm, rx_fd; + + if (likely(time_before(jiffies, timestamp + HZ/10))) + return false; + + if (!netif_carrier_ok(ag->dev)) + return false; + + rx_sm = ag71xx_rr(ag, AG71XX_REG_RX_SM); + if ((rx_sm & 0x7) == 0x3 && ((rx_sm >> 4) & 0x7) == 0x6) + return true; + + tx_sm = ag71xx_rr(ag, AG71XX_REG_TX_SM); + rx_fd = ag71xx_rr(ag, AG71XX_REG_FIFO_DEPTH); + if (((tx_sm >> 4) & 0x7) == 0 && ((rx_sm & 0x7) == 0) && + ((rx_sm >> 4) & 0x7) == 0 && rx_fd == 0) + return true; + + return false; +} + static int ag71xx_tx_packets(struct ag71xx *ag) { struct ag71xx_ring *ring = &ag->tx_ring; + struct ag71xx_platform_data *pdata = ag71xx_get_pdata(ag); int sent; DBG("%s: processing TX ring\n", ag->dev->name); @@ -818,8 +842,12 @@ static int ag71xx_tx_packets(struct ag71xx *ag) struct ag71xx_desc *desc = ring->buf[i].desc; struct sk_buff *skb = ring->buf[i].skb; - if (!ag71xx_desc_empty(desc)) + if (!ag71xx_desc_empty(desc)) { + if (pdata->is_ar7240 && + ag71xx_check_dma_stuck(ag, ring->buf[i].timestamp)) + schedule_work(&ag->restart_work); break; + } ag71xx_wr(ag, AG71XX_REG_TX_STATUS, TX_STATUS_PS); |