From 073a345c04b01da0cc5b79ac7be0c7c8b1691ef5 Mon Sep 17 00:00:00 2001 From: Lennert Buytenhek Date: Sun, 1 Jun 2008 02:00:31 +0200 Subject: [PATCH] mv643xx_eth: clarify irq masking and unmasking Replace the nondescriptive names ETH_INT_UNMASK_ALL and ETH_INT_UNMASK_ALL_EXT by names of the actual fields being masked and unmasked in the various writes to the interrupt mask registers. Signed-off-by: Lennert Buytenhek Acked-by: Dale Farnsworth --- drivers/net/mv643xx_eth.c | 61 +++++++++++++++------------------------ 1 file changed, 24 insertions(+), 37 deletions(-) diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c index 8a9ee8e46a1..d5c9ceb2f68 100644 --- a/drivers/net/mv643xx_eth.c +++ b/drivers/net/mv643xx_eth.c @@ -106,7 +106,14 @@ static char mv643xx_driver_version[] = "1.0"; #define TXQ_COMMAND(p) (0x0448 + ((p) << 10)) #define TX_BW_MTU(p) (0x0458 + ((p) << 10)) #define INT_CAUSE(p) (0x0460 + ((p) << 10)) +#define INT_RX 0x00000804 +#define INT_EXT 0x00000002 #define INT_CAUSE_EXT(p) (0x0464 + ((p) << 10)) +#define INT_EXT_LINK 0x00100000 +#define INT_EXT_PHY 0x00010000 +#define INT_EXT_TX_ERROR_0 0x00000100 +#define INT_EXT_TX_0 0x00000001 +#define INT_EXT_TX 0x00000101 #define INT_MASK(p) (0x0468 + ((p) << 10)) #define INT_MASK_EXT(p) (0x046c + ((p) << 10)) #define TX_FIFO_URGENT_THRESHOLD(p) (0x0474 + ((p) << 10)) @@ -162,26 +169,6 @@ static char mv643xx_driver_version[] = "1.0"; #define PORT_DEFAULT_TRANSMIT_QUEUE_SIZE 800 #define PORT_DEFAULT_RECEIVE_QUEUE_SIZE 400 -#define ETH_RX_QUEUES_ENABLED (1 << 0) /* use only Q0 for receive */ -#define ETH_TX_QUEUES_ENABLED (1 << 0) /* use only Q0 for transmit */ - -#define ETH_INT_CAUSE_RX_DONE (ETH_RX_QUEUES_ENABLED << 2) -#define ETH_INT_CAUSE_RX_ERROR (ETH_RX_QUEUES_ENABLED << 9) -#define ETH_INT_CAUSE_RX (ETH_INT_CAUSE_RX_DONE | ETH_INT_CAUSE_RX_ERROR) -#define ETH_INT_CAUSE_EXT 0x00000002 -#define ETH_INT_UNMASK_ALL (ETH_INT_CAUSE_RX | ETH_INT_CAUSE_EXT) - -#define ETH_INT_CAUSE_TX_DONE (ETH_TX_QUEUES_ENABLED << 0) -#define ETH_INT_CAUSE_TX_ERROR (ETH_TX_QUEUES_ENABLED << 8) -#define ETH_INT_CAUSE_TX (ETH_INT_CAUSE_TX_DONE | ETH_INT_CAUSE_TX_ERROR) -#define ETH_INT_CAUSE_PHY 0x00010000 -#define ETH_INT_CAUSE_STATE 0x00100000 -#define ETH_INT_UNMASK_ALL_EXT (ETH_INT_CAUSE_TX | ETH_INT_CAUSE_PHY | \ - ETH_INT_CAUSE_STATE) - -#define ETH_INT_MASK_ALL 0x00000000 -#define ETH_INT_MASK_ALL_EXT 0x00000000 - #define PHY_WAIT_ITERATIONS 1000 /* 1000 iterations * 10uS = 10mS max */ #define PHY_WAIT_MICRO_SECONDS 10 @@ -841,7 +828,7 @@ static int mv643xx_poll(struct napi_struct *napi, int budget) netif_rx_complete(dev, napi); wrl(mp, INT_CAUSE(port_num), 0); wrl(mp, INT_CAUSE_EXT(port_num), 0); - wrl(mp, INT_MASK(port_num), ETH_INT_UNMASK_ALL); + wrl(mp, INT_MASK(port_num), INT_RX | INT_EXT); } return work_done; @@ -997,7 +984,7 @@ static void eth_tx_submit_descs_for_skb(struct mv643xx_private *mp, /* ensure all descriptors are written before poking hardware */ wmb(); - mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); + mv643xx_eth_port_enable_tx(mp, 1); mp->tx_desc_count += nr_frags + 1; } @@ -1980,21 +1967,21 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) unsigned int port_num = mp->port_num; /* Read interrupt cause registers */ - eth_int_cause = rdl(mp, INT_CAUSE(port_num)) & ETH_INT_UNMASK_ALL; - if (eth_int_cause & ETH_INT_CAUSE_EXT) { + eth_int_cause = rdl(mp, INT_CAUSE(port_num)) & (INT_RX | INT_EXT); + if (eth_int_cause & INT_EXT) { eth_int_cause_ext = rdl(mp, INT_CAUSE_EXT(port_num)) - & ETH_INT_UNMASK_ALL_EXT; + & (INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX); wrl(mp, INT_CAUSE_EXT(port_num), ~eth_int_cause_ext); } /* PHY status changed */ - if (eth_int_cause_ext & (ETH_INT_CAUSE_PHY | ETH_INT_CAUSE_STATE)) { + if (eth_int_cause_ext & (INT_EXT_LINK | INT_EXT_PHY)) { struct ethtool_cmd cmd; if (mii_link_ok(&mp->mii)) { mii_ethtool_gset(&mp->mii, &cmd); mv643xx_eth_update_pscr(dev, &cmd); - mv643xx_eth_port_enable_tx(mp, ETH_TX_QUEUES_ENABLED); + mv643xx_eth_port_enable_tx(mp, 1); if (!netif_carrier_ok(dev)) { netif_carrier_on(dev); if (mp->tx_ring_size - mp->tx_desc_count >= @@ -2008,9 +1995,9 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) } #ifdef MV643XX_NAPI - if (eth_int_cause & ETH_INT_CAUSE_RX) { + if (eth_int_cause & INT_RX) { /* schedule the NAPI poll routine to maintain port */ - wrl(mp, INT_MASK(port_num), ETH_INT_MASK_ALL); + wrl(mp, INT_MASK(port_num), 0x00000000); /* wait for previous write to complete */ rdl(mp, INT_MASK(port_num)); @@ -2018,10 +2005,10 @@ static irqreturn_t mv643xx_eth_int_handler(int irq, void *dev_id) netif_rx_schedule(dev, &mp->napi); } #else - if (eth_int_cause & ETH_INT_CAUSE_RX) + if (eth_int_cause & INT_RX) mv643xx_eth_receive_queue(dev, INT_MAX); #endif - if (eth_int_cause_ext & ETH_INT_CAUSE_TX) + if (eth_int_cause_ext & INT_EXT_TX) mv643xx_eth_free_completed_tx_descs(dev); /* @@ -2145,7 +2132,7 @@ static void eth_port_start(struct net_device *dev) wrl(mp, SDMA_CONFIG(port_num), PORT_SDMA_CONFIG_DEFAULT_VALUE); /* Enable port Rx. */ - mv643xx_eth_port_enable_rx(mp, ETH_RX_QUEUES_ENABLED); + mv643xx_eth_port_enable_rx(mp, 1); /* Disable port bandwidth limits by clearing MTU register */ wrl(mp, TX_BW_MTU(port_num), 0); @@ -2392,10 +2379,10 @@ static int mv643xx_eth_open(struct net_device *dev) eth_port_set_tx_coal(mp, MV643XX_TX_COAL); /* Unmask phy and link status changes interrupts */ - wrl(mp, INT_MASK_EXT(port_num), ETH_INT_UNMASK_ALL_EXT); + wrl(mp, INT_MASK_EXT(port_num), INT_EXT_LINK | INT_EXT_PHY | INT_EXT_TX); /* Unmask RX buffer and TX end interrupt */ - wrl(mp, INT_MASK(port_num), ETH_INT_UNMASK_ALL); + wrl(mp, INT_MASK(port_num), INT_RX | INT_EXT); return 0; @@ -2462,7 +2449,7 @@ static int mv643xx_eth_stop(struct net_device *dev) unsigned int port_num = mp->port_num; /* Mask all interrupts on ethernet port */ - wrl(mp, INT_MASK(port_num), ETH_INT_MASK_ALL); + wrl(mp, INT_MASK(port_num), 0x00000000); /* wait for previous write to complete */ rdl(mp, INT_MASK(port_num)); @@ -2567,13 +2554,13 @@ static void mv643xx_netpoll(struct net_device *netdev) struct mv643xx_private *mp = netdev_priv(netdev); int port_num = mp->port_num; - wrl(mp, INT_MASK(port_num), ETH_INT_MASK_ALL); + wrl(mp, INT_MASK(port_num), 0x00000000); /* wait for previous write to complete */ rdl(mp, INT_MASK(port_num)); mv643xx_eth_int_handler(netdev->irq, netdev); - wrl(mp, INT_MASK(port_num), ETH_INT_UNMASK_ALL); + wrl(mp, INT_MASK(port_num), INT_RX | INT_CAUSE_EXT); } #endif -- 2.41.1