Lines Matching +full:rx +full:- +full:burst +full:- +full:length
1 // SPDX-License-Identifier: GPL-2.0-only
26 #include <linux/dma-mapping.h>
65 /* use 2 static channels for TX/RX */
109 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); in ltq_etop_alloc_skb()
111 ch->skb[ch->dma.desc] = netdev_alloc_skb(ch->netdev, MAX_DMA_DATA_LEN); in ltq_etop_alloc_skb()
112 if (!ch->skb[ch->dma.desc]) in ltq_etop_alloc_skb()
113 return -ENOMEM; in ltq_etop_alloc_skb()
114 ch->dma.desc_base[ch->dma.desc].addr = in ltq_etop_alloc_skb()
115 dma_map_single(&priv->pdev->dev, ch->skb[ch->dma.desc]->data, in ltq_etop_alloc_skb()
117 ch->dma.desc_base[ch->dma.desc].addr = in ltq_etop_alloc_skb()
118 CPHYSADDR(ch->skb[ch->dma.desc]->data); in ltq_etop_alloc_skb()
119 ch->dma.desc_base[ch->dma.desc].ctl = in ltq_etop_alloc_skb()
122 skb_reserve(ch->skb[ch->dma.desc], NET_IP_ALIGN); in ltq_etop_alloc_skb()
129 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); in ltq_etop_hw_receive()
130 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; in ltq_etop_hw_receive()
131 struct sk_buff *skb = ch->skb[ch->dma.desc]; in ltq_etop_hw_receive()
132 int len = (desc->ctl & LTQ_DMA_SIZE_MASK) - MAX_DMA_CRC_LEN; in ltq_etop_hw_receive()
135 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_hw_receive()
137 netdev_err(ch->netdev, in ltq_etop_hw_receive()
138 "failed to allocate new rx buffer, stopping DMA\n"); in ltq_etop_hw_receive()
139 ltq_dma_close(&ch->dma); in ltq_etop_hw_receive()
141 ch->dma.desc++; in ltq_etop_hw_receive()
142 ch->dma.desc %= LTQ_DESC_NUM; in ltq_etop_hw_receive()
143 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_hw_receive()
146 skb->protocol = eth_type_trans(skb, ch->netdev); in ltq_etop_hw_receive()
158 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; in ltq_etop_poll_rx()
160 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) != LTQ_DMA_C) in ltq_etop_poll_rx()
166 napi_complete_done(&ch->napi, work_done); in ltq_etop_poll_rx()
167 ltq_dma_ack_irq(&ch->dma); in ltq_etop_poll_rx()
177 struct ltq_etop_priv *priv = netdev_priv(ch->netdev); in ltq_etop_poll_tx()
179 netdev_get_tx_queue(ch->netdev, ch->idx >> 1); in ltq_etop_poll_tx()
182 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_poll_tx()
183 while ((ch->dma.desc_base[ch->tx_free].ctl & in ltq_etop_poll_tx()
185 dev_kfree_skb_any(ch->skb[ch->tx_free]); in ltq_etop_poll_tx()
186 ch->skb[ch->tx_free] = NULL; in ltq_etop_poll_tx()
187 memset(&ch->dma.desc_base[ch->tx_free], 0, in ltq_etop_poll_tx()
189 ch->tx_free++; in ltq_etop_poll_tx()
190 ch->tx_free %= LTQ_DESC_NUM; in ltq_etop_poll_tx()
192 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_poll_tx()
196 napi_complete(&ch->napi); in ltq_etop_poll_tx()
197 ltq_dma_ack_irq(&ch->dma); in ltq_etop_poll_tx()
205 int ch = irq - LTQ_DMA_CH0_INT; in ltq_etop_dma_irq()
207 napi_schedule(&priv->ch[ch].napi); in ltq_etop_dma_irq()
216 ltq_dma_free(&ch->dma); in ltq_etop_free_channel()
217 if (ch->dma.irq) in ltq_etop_free_channel()
218 free_irq(ch->dma.irq, priv); in ltq_etop_free_channel()
219 if (IS_RX(ch->idx)) { in ltq_etop_free_channel()
223 dev_kfree_skb_any(ch->skb[ch->dma.desc]); in ltq_etop_free_channel()
236 ltq_etop_free_channel(dev, &priv->ch[i]); in ltq_etop_hw_exit()
248 switch (priv->pldata->mii_mode) { in ltq_etop_hw_init()
261 priv->pldata->mii_mode); in ltq_etop_hw_init()
262 return -ENOTSUPP; in ltq_etop_hw_init()
268 ltq_dma_init_port(DMA_PORT_ETOP, priv->tx_burst_len, priv->rx_burst_len); in ltq_etop_hw_init()
272 struct ltq_etop_chan *ch = &priv->ch[i]; in ltq_etop_hw_init()
274 ch->dma.nr = i; in ltq_etop_hw_init()
275 ch->idx = ch->dma.nr; in ltq_etop_hw_init()
276 ch->dma.dev = &priv->pdev->dev; in ltq_etop_hw_init()
279 ltq_dma_alloc_tx(&ch->dma); in ltq_etop_hw_init()
288 ltq_dma_alloc_rx(&ch->dma); in ltq_etop_hw_init()
289 for (ch->dma.desc = 0; ch->dma.desc < LTQ_DESC_NUM; in ltq_etop_hw_init()
290 ch->dma.desc++) in ltq_etop_hw_init()
292 return -ENOMEM; in ltq_etop_hw_init()
293 ch->dma.desc = 0; in ltq_etop_hw_init()
297 "Unable to get Rx DMA IRQ %d\n", in ltq_etop_hw_init()
302 ch->dma.irq = irq; in ltq_etop_hw_init()
310 strscpy(info->driver, "Lantiq ETOP", sizeof(info->driver)); in ltq_etop_get_drvinfo()
311 strscpy(info->bus_info, "internal", sizeof(info->bus_info)); in ltq_etop_get_drvinfo()
312 strscpy(info->version, DRV_VERSION, sizeof(info->version)); in ltq_etop_get_drvinfo()
364 phydev = phy_find_first(priv->mii_bus); in ltq_etop_mdio_probe()
368 return -ENODEV; in ltq_etop_mdio_probe()
372 <q_etop_mdio_link, priv->pldata->mii_mode); in ltq_etop_mdio_probe()
392 priv->mii_bus = mdiobus_alloc(); in ltq_etop_mdio_init()
393 if (!priv->mii_bus) { in ltq_etop_mdio_init()
395 err = -ENOMEM; in ltq_etop_mdio_init()
399 priv->mii_bus->priv = dev; in ltq_etop_mdio_init()
400 priv->mii_bus->read = ltq_etop_mdio_rd; in ltq_etop_mdio_init()
401 priv->mii_bus->write = ltq_etop_mdio_wr; in ltq_etop_mdio_init()
402 priv->mii_bus->name = "ltq_mii"; in ltq_etop_mdio_init()
403 snprintf(priv->mii_bus->id, MII_BUS_ID_SIZE, "%s-%x", in ltq_etop_mdio_init()
404 priv->pdev->name, priv->pdev->id); in ltq_etop_mdio_init()
405 if (mdiobus_register(priv->mii_bus)) { in ltq_etop_mdio_init()
406 err = -ENXIO; in ltq_etop_mdio_init()
411 err = -ENXIO; in ltq_etop_mdio_init()
417 mdiobus_unregister(priv->mii_bus); in ltq_etop_mdio_init()
419 mdiobus_free(priv->mii_bus); in ltq_etop_mdio_init()
429 phy_disconnect(dev->phydev); in ltq_etop_mdio_cleanup()
430 mdiobus_unregister(priv->mii_bus); in ltq_etop_mdio_cleanup()
431 mdiobus_free(priv->mii_bus); in ltq_etop_mdio_cleanup()
441 struct ltq_etop_chan *ch = &priv->ch[i]; in ltq_etop_open()
445 ltq_dma_open(&ch->dma); in ltq_etop_open()
446 ltq_dma_enable_irq(&ch->dma); in ltq_etop_open()
447 napi_enable(&ch->napi); in ltq_etop_open()
449 phy_start(dev->phydev); in ltq_etop_open()
461 phy_stop(dev->phydev); in ltq_etop_stop()
463 struct ltq_etop_chan *ch = &priv->ch[i]; in ltq_etop_stop()
467 napi_disable(&ch->napi); in ltq_etop_stop()
468 ltq_dma_close(&ch->dma); in ltq_etop_stop()
479 struct ltq_etop_chan *ch = &priv->ch[(queue << 1) | 1]; in ltq_etop_tx()
480 struct ltq_dma_desc *desc = &ch->dma.desc_base[ch->dma.desc]; in ltq_etop_tx()
485 len = skb->len < ETH_ZLEN ? ETH_ZLEN : skb->len; in ltq_etop_tx()
487 if ((desc->ctl & (LTQ_DMA_OWN | LTQ_DMA_C)) || ch->skb[ch->dma.desc]) { in ltq_etop_tx()
493 /* dma needs to start on a burst length value aligned address */ in ltq_etop_tx()
494 byte_offset = CPHYSADDR(skb->data) % (priv->tx_burst_len * 4); in ltq_etop_tx()
495 ch->skb[ch->dma.desc] = skb; in ltq_etop_tx()
499 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_tx()
500 desc->addr = ((unsigned int)dma_map_single(&priv->pdev->dev, skb->data, len, in ltq_etop_tx()
501 DMA_TO_DEVICE)) - byte_offset; in ltq_etop_tx()
504 desc->ctl = LTQ_DMA_OWN | LTQ_DMA_SOP | LTQ_DMA_EOP | in ltq_etop_tx()
506 ch->dma.desc++; in ltq_etop_tx()
507 ch->dma.desc %= LTQ_DESC_NUM; in ltq_etop_tx()
508 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_tx()
510 if (ch->dma.desc_base[ch->dma.desc].ctl & LTQ_DMA_OWN) in ltq_etop_tx()
522 dev->mtu = new_mtu; in ltq_etop_change_mtu()
524 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_change_mtu()
526 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_change_mtu()
541 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_set_mac_address()
542 ltq_etop_w32(*((u32 *)dev->dev_addr), LTQ_ETOP_MAC_DA0); in ltq_etop_set_mac_address()
543 ltq_etop_w32(*((u16 *)&dev->dev_addr[4]) << 16, in ltq_etop_set_mac_address()
545 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_set_mac_address()
557 spin_lock_irqsave(&priv->lock, flags); in ltq_etop_set_multicast_list()
558 if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI)) in ltq_etop_set_multicast_list()
562 spin_unlock_irqrestore(&priv->lock, flags); in ltq_etop_set_multicast_list()
573 dev->watchdog_timeo = 10 * HZ; in ltq_etop_init()
579 memcpy(&mac, &priv->pldata->mac, sizeof(struct sockaddr)); in ltq_etop_init()
592 dev->addr_assign_type = NET_ADDR_RANDOM; in ltq_etop_init()
651 dev_err(&pdev->dev, "failed to get etop resource\n"); in ltq_etop_probe()
652 err = -ENOENT; in ltq_etop_probe()
656 res = devm_request_mem_region(&pdev->dev, res->start, in ltq_etop_probe()
657 resource_size(res), dev_name(&pdev->dev)); in ltq_etop_probe()
659 dev_err(&pdev->dev, "failed to request etop resource\n"); in ltq_etop_probe()
660 err = -EBUSY; in ltq_etop_probe()
664 ltq_etop_membase = devm_ioremap(&pdev->dev, res->start, in ltq_etop_probe()
667 dev_err(&pdev->dev, "failed to remap etop engine %d\n", in ltq_etop_probe()
668 pdev->id); in ltq_etop_probe()
669 err = -ENOMEM; in ltq_etop_probe()
675 err = -ENOMEM; in ltq_etop_probe()
678 strcpy(dev->name, "eth%d"); in ltq_etop_probe()
679 dev->netdev_ops = <q_eth_netdev_ops; in ltq_etop_probe()
680 dev->ethtool_ops = <q_etop_ethtool_ops; in ltq_etop_probe()
682 priv->res = res; in ltq_etop_probe()
683 priv->pdev = pdev; in ltq_etop_probe()
684 priv->pldata = dev_get_platdata(&pdev->dev); in ltq_etop_probe()
685 priv->netdev = dev; in ltq_etop_probe()
686 spin_lock_init(&priv->lock); in ltq_etop_probe()
687 SET_NETDEV_DEV(dev, &pdev->dev); in ltq_etop_probe()
689 err = device_property_read_u32(&pdev->dev, "lantiq,tx-burst-length", &priv->tx_burst_len); in ltq_etop_probe()
691 dev_err(&pdev->dev, "unable to read tx-burst-length property\n"); in ltq_etop_probe()
695 err = device_property_read_u32(&pdev->dev, "lantiq,rx-burst-length", &priv->rx_burst_len); in ltq_etop_probe()
697 dev_err(&pdev->dev, "unable to read rx-burst-length property\n"); in ltq_etop_probe()
703 netif_napi_add_weight(dev, &priv->ch[i].napi, in ltq_etop_probe()
706 netif_napi_add_weight(dev, &priv->ch[i].napi, in ltq_etop_probe()
708 priv->ch[i].netdev = dev; in ltq_etop_probe()