diff options
Diffstat (limited to 'target/linux/adm5120/files/drivers/net/adm5120sw.c')
| -rw-r--r-- | target/linux/adm5120/files/drivers/net/adm5120sw.c | 374 |
1 files changed, 214 insertions, 160 deletions
diff --git a/target/linux/adm5120/files/drivers/net/adm5120sw.c b/target/linux/adm5120/files/drivers/net/adm5120sw.c index 987e1de311..e354a35a61 100644 --- a/target/linux/adm5120/files/drivers/net/adm5120sw.c +++ b/target/linux/adm5120/files/drivers/net/adm5120sw.c @@ -163,7 +163,6 @@ static spinlock_t sw_lock = SPIN_LOCK_UNLOCKED; static spinlock_t poll_lock = SPIN_LOCK_UNLOCKED; static struct net_device sw_dev; -static struct net_device *poll_dev; /* ------------------------------------------------------------------------ */ @@ -458,31 +457,6 @@ static int adm5120_switch_rx(int limit) } -static int adm5120_switch_poll(struct net_device *dev, int *budget) -{ - int limit = min(dev->quota, *budget); - int done; - u32 status; - - done = adm5120_switch_rx(limit); - - *budget -= done; - dev->quota -= done; - - status = sw_int_status() & SWITCH_INTS_POLL; - if ((done < limit) && (!status)) { - spin_lock_irq(&poll_lock); - SW_DBG("disable polling mode for %s\n", poll_dev->name); - netif_rx_complete(poll_dev); - sw_int_unmask(SWITCH_INTS_POLL); - poll_dev = NULL; - spin_unlock_irq(&poll_lock); - return 0; - } - - return 1; -} - static void adm5120_switch_tx(void) { unsigned int entry; @@ -517,6 +491,28 @@ static void adm5120_switch_tx(void) } } +static int adm5120_if_poll(struct net_device *dev, int *budget) +{ + int limit = min(dev->quota, *budget); + int done; + u32 status; + + done = adm5120_switch_rx(limit); + + *budget -= done; + dev->quota -= done; + + status = sw_int_status() & SWITCH_INTS_POLL; + if ((done < limit) && (!status)) { + SW_DBG("disable polling mode for %s\n", poll_dev->name); + netif_rx_complete(dev); + sw_int_unmask(SWITCH_INTS_POLL); + return 0; + } + + return 1; +} + static irqreturn_t adm5120_poll_irq(int irq, void *dev_id) { struct net_device *dev = dev_id; @@ -529,19 +525,9 @@ static irqreturn_t adm5120_poll_irq(int irq, void *dev_id) sw_dump_intr_mask("poll ints", status); - if (!netif_running(dev)) { - SW_DBG("device %s is not running\n", dev->name); - return IRQ_NONE; - } - - spin_lock(&poll_lock); - if (!poll_dev) { - SW_DBG("enable polling mode for %s\n", dev->name); - poll_dev = dev; - sw_int_mask(SWITCH_INTS_POLL); - netif_rx_schedule(poll_dev); - } - spin_unlock(&poll_lock); + SW_DBG("enable polling mode for %s\n", dev->name); + sw_int_mask(SWITCH_INTS_POLL); + netif_rx_schedule(dev); return IRQ_HANDLED; } @@ -605,12 +591,143 @@ static void adm5120_set_bw(char *matrix) sw_read_reg(SWITCH_REG_BW_CNTL1)); } -static int adm5120_switch_open(struct net_device *dev) +static void adm5120_switch_tx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + memset(desc, 0, num * sizeof(*desc)); + desc[num-1].buf1 |= DESC_EOR; + memset(skbl, 0, sizeof(struct skb*)*num); + + cur_txl = 0; + dirty_txl = 0; +} + +static void adm5120_switch_rx_ring_reset(struct dma_desc *desc, + struct sk_buff **skbl, int num) +{ + int i; + + memset(desc, 0, num * sizeof(*desc)); + for (i = 0; i < num; i++) { + skbl[i] = dev_alloc_skb(SKB_ALLOC_LEN); + if (!skbl[i]) { + i = num; + break; + } + skb_reserve(skbl[i], SKB_RESERVE_LEN); + adm5120_rx_dma_update(&desc[i], skbl[i], (num-1==i)); + } + + cur_rxl = 0; + dirty_rxl = 0; +} + +static int adm5120_switch_tx_ring_alloc(void) +{ + int err; + + txl_descs = dma_alloc_coherent(NULL, TX_DESCS_SIZE, &txl_descs_dma, + GFP_ATOMIC); + if (!txl_descs) { + err = -ENOMEM; + goto err; + } + + txl_skbuff = kzalloc(TX_SKBS_SIZE, GFP_KERNEL); + if (!txl_skbuff) { + err = -ENOMEM; + goto err; + } + + return 0; + +err: + return err; +} + +static void adm5120_switch_tx_ring_free(void) +{ + int i; + + if (txl_skbuff) { + for (i = 0; i < TX_RING_SIZE; i++) + if (txl_skbuff[i]) + kfree_skb(txl_skbuff[i]); + kfree(txl_skbuff); + } + + if (txl_descs) + dma_free_coherent(NULL, TX_DESCS_SIZE, txl_descs, + txl_descs_dma); +} + +static int adm5120_switch_rx_ring_alloc(void) +{ + int err; + int i; + + /* init RX ring */ + rxl_descs = dma_alloc_coherent(NULL, RX_DESCS_SIZE, &rxl_descs_dma, + GFP_ATOMIC); + if (!rxl_descs) { + err = -ENOMEM; + goto err; + } + + rxl_skbuff = kzalloc(RX_SKBS_SIZE, GFP_KERNEL); + if (!rxl_skbuff) { + err = -ENOMEM; + goto err; + } + + for (i = 0; i < RX_RING_SIZE; i++) { + struct sk_buff *skb; + skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); + if (!skb) { + err = -ENOMEM; + goto err; + } + rxl_skbuff[i] = skb; + skb_reserve(skb, SKB_RESERVE_LEN); + } + + return 0; + +err: + return err; +} + +static void adm5120_switch_rx_ring_free(void) +{ + int i; + + if (rxl_skbuff) { + for (i = 0; i < RX_RING_SIZE; i++) + if (rxl_skbuff[i]) + kfree_skb(rxl_skbuff[i]); + kfree(rxl_skbuff); + } + + if (rxl_descs) + dma_free_coherent(NULL, RX_DESCS_SIZE, rxl_descs, + rxl_descs_dma); +} + +/* ------------------------------------------------------------------------ */ + +static int adm5120_if_open(struct net_device *dev) { u32 t; + int err; int i; - netif_start_queue(dev); + err = request_irq(dev->irq, adm5120_poll_irq, + (IRQF_SHARED | IRQF_DISABLED), dev->name, dev); + if (err) { + SW_ERR("unable to get irq for %s\n", dev->name); + goto err; + } + if (!sw_used++) /* enable interrupts on first open */ sw_int_unmask(SWITCH_INTS_USED); @@ -623,16 +740,20 @@ static int adm5120_switch_open(struct net_device *dev) } sw_write_reg(SWITCH_REG_PORT_CONF0, t); + netif_start_queue(dev); + return 0; + +err: + return err; } -static int adm5120_switch_stop(struct net_device *dev) +static int adm5120_if_stop(struct net_device *dev) { u32 t; int i; - if (!--sw_used) - sw_int_mask(SWITCH_INTS_USED); + netif_stop_queue(dev); /* disable port if not assigned to other devices */ t = sw_read_reg(SWITCH_REG_PORT_CONF0); @@ -643,11 +764,16 @@ static int adm5120_switch_stop(struct net_device *dev) } sw_write_reg(SWITCH_REG_PORT_CONF0, t); - netif_stop_queue(dev); + if (!--sw_used) + sw_int_mask(SWITCH_INTS_USED); + + free_irq(dev->irq, dev); + return 0; } -static int adm5120_sw_start_xmit(struct sk_buff *skb, struct net_device *dev) +static int adm5120_if_hard_start_xmit(struct sk_buff *skb, + struct net_device *dev) { struct dma_desc *desc; struct adm5120_sw *priv = netdev_priv(dev); @@ -695,7 +821,7 @@ static int adm5120_sw_start_xmit(struct sk_buff *skb, struct net_device *dev) return 0; } -static void adm5120_tx_timeout(struct net_device *dev) +static void adm5120_if_tx_timeout(struct net_device *dev) { SW_INFO("TX timeout on %s\n",dev->name); } @@ -769,7 +895,7 @@ static void adm5120_write_mac(struct net_device *dev) while (!(sw_read_reg(SWITCH_REG_MAC_WT0) & MAC_WT0_MWD)); } -static int adm5120_sw_set_mac_address(struct net_device *dev, void *p) +static int adm5120_if_set_mac_address(struct net_device *dev, void *p) { struct sockaddr *addr = p; @@ -778,7 +904,7 @@ static int adm5120_sw_set_mac_address(struct net_device *dev, void *p) return 0; } -static int adm5120_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +static int adm5120_if_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) { int err; struct adm5120_sw_info info; @@ -827,29 +953,30 @@ static int adm5120_do_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) return 0; } -static void adm5120_dma_tx_init(struct dma_desc *desc, struct sk_buff **skbl, - int num) +static struct net_device *adm5120_if_alloc(void) { - memset(desc, 0, num * sizeof(*desc)); - desc[num-1].buf1 |= DESC_EOR; - memset(skbl, 0, sizeof(struct skb*)*num); -} - -static void adm5120_dma_rx_init(struct dma_desc *desc, struct sk_buff **skbl, - int num) -{ - int i; - - memset(desc, 0, num * sizeof(*desc)); - for (i=0; i<num; i++) { - skbl[i] = dev_alloc_skb(SKB_ALLOC_LEN); - if (!skbl[i]) { - i=num; - break; - } - skb_reserve(skbl[i], SKB_RESERVE_LEN); - adm5120_rx_dma_update(&desc[i], skbl[i], (num-1==i)); - } + struct net_device *dev; + struct adm5120_sw *priv; + + dev = alloc_etherdev(sizeof(*priv)); + if (!dev) + return NULL; + + dev->irq = ADM5120_IRQ_SWITCH; + dev->open = adm5120_if_open; + dev->hard_start_xmit = adm5120_if_hard_start_xmit; + dev->stop = adm5120_if_stop; + dev->set_multicast_list = adm5120_set_multicast_list; + dev->do_ioctl = adm5120_if_do_ioctl; + dev->tx_timeout = adm5120_if_tx_timeout; + dev->watchdog_timeo = TX_TIMEOUT; + dev->set_mac_address = adm5120_if_set_mac_address; + dev->poll = adm5120_if_poll; + dev->weight = 64; + + SET_MODULE_OWNER(dev); + + return dev; } static void adm5120_switch_cleanup(void) @@ -863,41 +990,18 @@ static void adm5120_switch_cleanup(void) struct net_device *dev = adm5120_devs[i]; if (dev) { unregister_netdev(dev); - free_irq(ADM5120_IRQ_SWITCH, dev); free_netdev(dev); } } - /* cleanup TX ring */ - if (txl_skbuff) { - for (i = 0; i < TX_RING_SIZE; i++) - if (txl_skbuff[i]) - kfree_skb(txl_skbuff[i]); - kfree(txl_skbuff); - } - - if (txl_descs) - dma_free_coherent(NULL, TX_DESCS_SIZE, txl_descs, - txl_descs_dma); - - /* cleanup RX ring */ - if (rxl_skbuff) { - for (i = 0; i < RX_RING_SIZE; i++) - if (rxl_skbuff[i]) - kfree_skb(rxl_skbuff[i]); - kfree(rxl_skbuff); - } - - if (rxl_descs) - dma_free_coherent(NULL, RX_DESCS_SIZE, rxl_descs, - rxl_descs_dma); + adm5120_switch_tx_ring_free(); + adm5120_switch_rx_ring_free(); free_irq(ADM5120_IRQ_SWITCH, &sw_dev); } static int __init adm5120_switch_init(void) { - struct net_device *dev; u32 t; int i, err; @@ -939,49 +1043,16 @@ static int __init adm5120_switch_init(void) sw_int_mask(SWITCH_INTS_ALL); sw_int_ack(SWITCH_INTS_ALL); - /* init RX ring */ - cur_rxl = dirty_rxl = 0; - rxl_descs = dma_alloc_coherent(NULL, RX_DESCS_SIZE, &rxl_descs_dma, - GFP_ATOMIC); - if (!rxl_descs) { - err = -ENOMEM; - goto err; - } - - rxl_skbuff = kzalloc(RX_SKBS_SIZE, GFP_KERNEL); - if (!rxl_skbuff) { - err = -ENOMEM; + err = adm5120_switch_rx_ring_alloc(); + if (err) goto err; - } - - for (i = 0; i < RX_RING_SIZE; i++) { - struct sk_buff *skb; - skb = alloc_skb(SKB_ALLOC_LEN, GFP_ATOMIC); - if (!skb) { - err = -ENOMEM; - goto err; - } - rxl_skbuff[i] = skb; - skb_reserve(skb, SKB_RESERVE_LEN); - } - /* init TX ring */ - cur_txl = dirty_txl = 0; - txl_descs = dma_alloc_coherent(NULL, TX_DESCS_SIZE, &txl_descs_dma, - GFP_ATOMIC); - if (!txl_descs) { - err = -ENOMEM; + err = adm5120_switch_tx_ring_alloc(); + if (err) goto err; - } - txl_skbuff = kzalloc(TX_SKBS_SIZE, GFP_KERNEL); - if (!txl_skbuff) { - err = -ENOMEM; - goto err; - } - - adm5120_dma_tx_init(txl_descs, txl_skbuff, TX_RING_SIZE); - adm5120_dma_rx_init(rxl_descs, rxl_skbuff, RX_RING_SIZE); + adm5120_switch_tx_ring_reset(txl_descs, txl_skbuff, TX_RING_SIZE); + adm5120_switch_rx_ring_reset(rxl_descs, rxl_skbuff, RX_RING_SIZE); sw_write_reg(SWITCH_REG_SHDA, 0); sw_write_reg(SWITCH_REG_SLDA, KSEG1ADDR(txl_descs)); @@ -989,35 +1060,19 @@ static int __init adm5120_switch_init(void) sw_write_reg(SWITCH_REG_RLDA, KSEG1ADDR(rxl_descs)); for (i = 0; i < SWITCH_NUM_PORTS; i++) { - adm5120_devs[i] = alloc_etherdev(sizeof(struct adm5120_sw)); - if (!adm5120_devs[i]) { + struct net_device *dev; + struct adm5120_sw *priv; + + dev = adm5120_if_alloc(); + if (!dev) { err = -ENOMEM; goto err; } - dev = adm5120_devs[i]; - err = request_irq(ADM5120_IRQ_SWITCH, adm5120_poll_irq, - (IRQF_SHARED | IRQF_DISABLED), dev->name, dev); - if (err) { - SW_ERR("unable to get irq for %s\n", dev->name); - goto err; - } + adm5120_devs[i] = dev; + priv = netdev_priv(dev); - SET_MODULE_OWNER(dev); - memset(netdev_priv(dev), 0, sizeof(struct adm5120_sw)); - ((struct adm5120_sw*)netdev_priv(dev))->port = i; - dev->base_addr = ADM5120_SWITCH_BASE; - dev->irq = ADM5120_IRQ_SWITCH; - dev->open = adm5120_switch_open; - dev->hard_start_xmit = adm5120_sw_start_xmit; - dev->stop = adm5120_switch_stop; - dev->set_multicast_list = adm5120_set_multicast_list; - dev->do_ioctl = adm5120_do_ioctl; - dev->tx_timeout = adm5120_tx_timeout; - dev->watchdog_timeo = TX_TIMEOUT; - dev->set_mac_address = adm5120_sw_set_mac_address; - dev->poll = adm5120_switch_poll; - dev->weight = 64; + priv->port = i; memcpy(dev->dev_addr, adm5120_eth_macs[i], 6); adm5120_write_mac(dev); @@ -1028,7 +1083,6 @@ static int __init adm5120_switch_init(void) dev->name, err); goto err; } - SW_INFO("%s created for switch port%d\n", dev->name, i); } /* setup vlan/port mapping after devs are filled up */ |