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- /* Altera Triple-Speed Ethernet MAC driver
- * Copyright (C) 2008-2014 Altera Corporation. All rights reserved
- *
- * Contributors:
- * Dalon Westergreen
- * Thomas Chou
- * Ian Abbott
- * Yuriy Kozlov
- * Tobias Klauser
- * Andriy Smolskyy
- * Roman Bulgakov
- * Dmytro Mytarchuk
- * Matthew Gerlach
- *
- * Original driver contributed by SLS.
- * Major updates contributed by GlobalLogic
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program. If not, see <http://www.gnu.org/licenses/>.
- */
- #include <linux/atomic.h>
- #include <linux/delay.h>
- #include <linux/etherdevice.h>
- #include <linux/if_vlan.h>
- #include <linux/init.h>
- #include <linux/interrupt.h>
- #include <linux/io.h>
- #include <linux/kernel.h>
- #include <linux/module.h>
- #include <linux/netdevice.h>
- #include <linux/of_device.h>
- #include <linux/of_mdio.h>
- #include <linux/of_net.h>
- #include <linux/of_platform.h>
- #include <linux/phy.h>
- #include <linux/platform_device.h>
- #include <linux/skbuff.h>
- #include <asm/cacheflush.h>
- #include "altera_utils.h"
- #include "altera_tse.h"
- #include "altera_sgdma.h"
- #include "altera_msgdma.h"
- static atomic_t instance_count = ATOMIC_INIT(~0);
- /* Module parameters */
- static int debug = -1;
- module_param(debug, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(debug, "Message Level (-1: default, 0: no output, 16: all)");
- static const u32 default_msg_level = (NETIF_MSG_DRV | NETIF_MSG_PROBE |
- NETIF_MSG_LINK | NETIF_MSG_IFUP |
- NETIF_MSG_IFDOWN);
- #define RX_DESCRIPTORS 64
- static int dma_rx_num = RX_DESCRIPTORS;
- module_param(dma_rx_num, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(dma_rx_num, "Number of descriptors in the RX list");
- #define TX_DESCRIPTORS 64
- static int dma_tx_num = TX_DESCRIPTORS;
- module_param(dma_tx_num, int, S_IRUGO | S_IWUSR);
- MODULE_PARM_DESC(dma_tx_num, "Number of descriptors in the TX list");
- #define POLL_PHY (-1)
- /* Make sure DMA buffer size is larger than the max frame size
- * plus some alignment offset and a VLAN header. If the max frame size is
- * 1518, a VLAN header would be additional 4 bytes and additional
- * headroom for alignment is 2 bytes, 2048 is just fine.
- */
- #define ALTERA_RXDMABUFFER_SIZE 2048
- /* Allow network stack to resume queueing packets after we've
- * finished transmitting at least 1/4 of the packets in the queue.
- */
- #define TSE_TX_THRESH(x) (x->tx_ring_size / 4)
- #define TXQUEUESTOP_THRESHHOLD 2
- static const struct of_device_id altera_tse_ids[];
- static inline u32 tse_tx_avail(struct altera_tse_private *priv)
- {
- return priv->tx_cons + priv->tx_ring_size - priv->tx_prod - 1;
- }
- /* MDIO specific functions
- */
- static int altera_tse_mdio_read(struct mii_bus *bus, int mii_id, int regnum)
- {
- struct net_device *ndev = bus->priv;
- struct altera_tse_private *priv = netdev_priv(ndev);
- /* set MDIO address */
- csrwr32((mii_id & 0x1f), priv->mac_dev,
- tse_csroffs(mdio_phy1_addr));
- /* get the data */
- return csrrd32(priv->mac_dev,
- tse_csroffs(mdio_phy1) + regnum * 4) & 0xffff;
- }
- static int altera_tse_mdio_write(struct mii_bus *bus, int mii_id, int regnum,
- u16 value)
- {
- struct net_device *ndev = bus->priv;
- struct altera_tse_private *priv = netdev_priv(ndev);
- /* set MDIO address */
- csrwr32((mii_id & 0x1f), priv->mac_dev,
- tse_csroffs(mdio_phy1_addr));
- /* write the data */
- csrwr32(value, priv->mac_dev, tse_csroffs(mdio_phy1) + regnum * 4);
- return 0;
- }
- static int altera_tse_mdio_create(struct net_device *dev, unsigned int id)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- int ret;
- int i;
- struct device_node *mdio_node = NULL;
- struct mii_bus *mdio = NULL;
- struct device_node *child_node = NULL;
- for_each_child_of_node(priv->device->of_node, child_node) {
- if (of_device_is_compatible(child_node, "altr,tse-mdio")) {
- mdio_node = child_node;
- break;
- }
- }
- if (mdio_node) {
- netdev_dbg(dev, "FOUND MDIO subnode\n");
- } else {
- netdev_dbg(dev, "NO MDIO subnode\n");
- return 0;
- }
- mdio = mdiobus_alloc();
- if (mdio == NULL) {
- netdev_err(dev, "Error allocating MDIO bus\n");
- return -ENOMEM;
- }
- mdio->name = ALTERA_TSE_RESOURCE_NAME;
- mdio->read = &altera_tse_mdio_read;
- mdio->write = &altera_tse_mdio_write;
- snprintf(mdio->id, MII_BUS_ID_SIZE, "%s-%u", mdio->name, id);
- mdio->irq = kcalloc(PHY_MAX_ADDR, sizeof(int), GFP_KERNEL);
- if (mdio->irq == NULL) {
- ret = -ENOMEM;
- goto out_free_mdio;
- }
- for (i = 0; i < PHY_MAX_ADDR; i++)
- mdio->irq[i] = PHY_POLL;
- mdio->priv = dev;
- mdio->parent = priv->device;
- ret = of_mdiobus_register(mdio, mdio_node);
- if (ret != 0) {
- netdev_err(dev, "Cannot register MDIO bus %s\n",
- mdio->id);
- goto out_free_mdio_irq;
- }
- if (netif_msg_drv(priv))
- netdev_info(dev, "MDIO bus %s: created\n", mdio->id);
- priv->mdio = mdio;
- return 0;
- out_free_mdio_irq:
- kfree(mdio->irq);
- out_free_mdio:
- mdiobus_free(mdio);
- mdio = NULL;
- return ret;
- }
- static void altera_tse_mdio_destroy(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- if (priv->mdio == NULL)
- return;
- if (netif_msg_drv(priv))
- netdev_info(dev, "MDIO bus %s: removed\n",
- priv->mdio->id);
- mdiobus_unregister(priv->mdio);
- kfree(priv->mdio->irq);
- mdiobus_free(priv->mdio);
- priv->mdio = NULL;
- }
- static int tse_init_rx_buffer(struct altera_tse_private *priv,
- struct tse_buffer *rxbuffer, int len)
- {
- rxbuffer->skb = netdev_alloc_skb_ip_align(priv->dev, len);
- if (!rxbuffer->skb)
- return -ENOMEM;
- rxbuffer->dma_addr = dma_map_single(priv->device, rxbuffer->skb->data,
- len,
- DMA_FROM_DEVICE);
- if (dma_mapping_error(priv->device, rxbuffer->dma_addr)) {
- netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
- dev_kfree_skb_any(rxbuffer->skb);
- return -EINVAL;
- }
- rxbuffer->dma_addr &= (dma_addr_t)~3;
- rxbuffer->len = len;
- return 0;
- }
- static void tse_free_rx_buffer(struct altera_tse_private *priv,
- struct tse_buffer *rxbuffer)
- {
- struct sk_buff *skb = rxbuffer->skb;
- dma_addr_t dma_addr = rxbuffer->dma_addr;
- if (skb != NULL) {
- if (dma_addr)
- dma_unmap_single(priv->device, dma_addr,
- rxbuffer->len,
- DMA_FROM_DEVICE);
- dev_kfree_skb_any(skb);
- rxbuffer->skb = NULL;
- rxbuffer->dma_addr = 0;
- }
- }
- /* Unmap and free Tx buffer resources
- */
- static void tse_free_tx_buffer(struct altera_tse_private *priv,
- struct tse_buffer *buffer)
- {
- if (buffer->dma_addr) {
- if (buffer->mapped_as_page)
- dma_unmap_page(priv->device, buffer->dma_addr,
- buffer->len, DMA_TO_DEVICE);
- else
- dma_unmap_single(priv->device, buffer->dma_addr,
- buffer->len, DMA_TO_DEVICE);
- buffer->dma_addr = 0;
- }
- if (buffer->skb) {
- dev_kfree_skb_any(buffer->skb);
- buffer->skb = NULL;
- }
- }
- static int alloc_init_skbufs(struct altera_tse_private *priv)
- {
- unsigned int rx_descs = priv->rx_ring_size;
- unsigned int tx_descs = priv->tx_ring_size;
- int ret = -ENOMEM;
- int i;
- /* Create Rx ring buffer */
- priv->rx_ring = kcalloc(rx_descs, sizeof(struct tse_buffer),
- GFP_KERNEL);
- if (!priv->rx_ring)
- goto err_rx_ring;
- /* Create Tx ring buffer */
- priv->tx_ring = kcalloc(tx_descs, sizeof(struct tse_buffer),
- GFP_KERNEL);
- if (!priv->tx_ring)
- goto err_tx_ring;
- priv->tx_cons = 0;
- priv->tx_prod = 0;
- /* Init Rx ring */
- for (i = 0; i < rx_descs; i++) {
- ret = tse_init_rx_buffer(priv, &priv->rx_ring[i],
- priv->rx_dma_buf_sz);
- if (ret)
- goto err_init_rx_buffers;
- }
- priv->rx_cons = 0;
- priv->rx_prod = 0;
- return 0;
- err_init_rx_buffers:
- while (--i >= 0)
- tse_free_rx_buffer(priv, &priv->rx_ring[i]);
- kfree(priv->tx_ring);
- err_tx_ring:
- kfree(priv->rx_ring);
- err_rx_ring:
- return ret;
- }
- static void free_skbufs(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- unsigned int rx_descs = priv->rx_ring_size;
- unsigned int tx_descs = priv->tx_ring_size;
- int i;
- /* Release the DMA TX/RX socket buffers */
- for (i = 0; i < rx_descs; i++)
- tse_free_rx_buffer(priv, &priv->rx_ring[i]);
- for (i = 0; i < tx_descs; i++)
- tse_free_tx_buffer(priv, &priv->tx_ring[i]);
- kfree(priv->tx_ring);
- }
- /* Reallocate the skb for the reception process
- */
- static inline void tse_rx_refill(struct altera_tse_private *priv)
- {
- unsigned int rxsize = priv->rx_ring_size;
- unsigned int entry;
- int ret;
- for (; priv->rx_cons - priv->rx_prod > 0;
- priv->rx_prod++) {
- entry = priv->rx_prod % rxsize;
- if (likely(priv->rx_ring[entry].skb == NULL)) {
- ret = tse_init_rx_buffer(priv, &priv->rx_ring[entry],
- priv->rx_dma_buf_sz);
- if (unlikely(ret != 0))
- break;
- priv->dmaops->add_rx_desc(priv, &priv->rx_ring[entry]);
- }
- }
- }
- /* Pull out the VLAN tag and fix up the packet
- */
- static inline void tse_rx_vlan(struct net_device *dev, struct sk_buff *skb)
- {
- struct ethhdr *eth_hdr;
- u16 vid;
- if ((dev->features & NETIF_F_HW_VLAN_CTAG_RX) &&
- !__vlan_get_tag(skb, &vid)) {
- eth_hdr = (struct ethhdr *)skb->data;
- memmove(skb->data + VLAN_HLEN, eth_hdr, ETH_ALEN * 2);
- skb_pull(skb, VLAN_HLEN);
- __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
- }
- }
- /* Receive a packet: retrieve and pass over to upper levels
- */
- static int tse_rx(struct altera_tse_private *priv, int limit)
- {
- unsigned int count = 0;
- unsigned int next_entry;
- struct sk_buff *skb;
- unsigned int entry = priv->rx_cons % priv->rx_ring_size;
- u32 rxstatus;
- u16 pktlength;
- u16 pktstatus;
- /* Check for count < limit first as get_rx_status is changing
- * the response-fifo so we must process the next packet
- * after calling get_rx_status if a response is pending.
- * (reading the last byte of the response pops the value from the fifo.)
- */
- while ((count < limit) &&
- ((rxstatus = priv->dmaops->get_rx_status(priv)) != 0)) {
- pktstatus = rxstatus >> 16;
- pktlength = rxstatus & 0xffff;
- if ((pktstatus & 0xFF) || (pktlength == 0))
- netdev_err(priv->dev,
- "RCV pktstatus %08X pktlength %08X\n",
- pktstatus, pktlength);
- /* DMA trasfer from TSE starts with 2 aditional bytes for
- * IP payload alignment. Status returned by get_rx_status()
- * contains DMA transfer length. Packet is 2 bytes shorter.
- */
- pktlength -= 2;
- count++;
- next_entry = (++priv->rx_cons) % priv->rx_ring_size;
- skb = priv->rx_ring[entry].skb;
- if (unlikely(!skb)) {
- netdev_err(priv->dev,
- "%s: Inconsistent Rx descriptor chain\n",
- __func__);
- priv->dev->stats.rx_dropped++;
- break;
- }
- priv->rx_ring[entry].skb = NULL;
- skb_put(skb, pktlength);
- /* make cache consistent with receive packet buffer */
- dma_sync_single_for_cpu(priv->device,
- priv->rx_ring[entry].dma_addr,
- priv->rx_ring[entry].len,
- DMA_FROM_DEVICE);
- dma_unmap_single(priv->device, priv->rx_ring[entry].dma_addr,
- priv->rx_ring[entry].len, DMA_FROM_DEVICE);
- if (netif_msg_pktdata(priv)) {
- netdev_info(priv->dev, "frame received %d bytes\n",
- pktlength);
- print_hex_dump(KERN_ERR, "data: ", DUMP_PREFIX_OFFSET,
- 16, 1, skb->data, pktlength, true);
- }
- tse_rx_vlan(priv->dev, skb);
- skb->protocol = eth_type_trans(skb, priv->dev);
- skb_checksum_none_assert(skb);
- napi_gro_receive(&priv->napi, skb);
- priv->dev->stats.rx_packets++;
- priv->dev->stats.rx_bytes += pktlength;
- entry = next_entry;
- tse_rx_refill(priv);
- }
- return count;
- }
- /* Reclaim resources after transmission completes
- */
- static int tse_tx_complete(struct altera_tse_private *priv)
- {
- unsigned int txsize = priv->tx_ring_size;
- u32 ready;
- unsigned int entry;
- struct tse_buffer *tx_buff;
- int txcomplete = 0;
- spin_lock(&priv->tx_lock);
- ready = priv->dmaops->tx_completions(priv);
- /* Free sent buffers */
- while (ready && (priv->tx_cons != priv->tx_prod)) {
- entry = priv->tx_cons % txsize;
- tx_buff = &priv->tx_ring[entry];
- if (netif_msg_tx_done(priv))
- netdev_dbg(priv->dev, "%s: curr %d, dirty %d\n",
- __func__, priv->tx_prod, priv->tx_cons);
- if (likely(tx_buff->skb))
- priv->dev->stats.tx_packets++;
- tse_free_tx_buffer(priv, tx_buff);
- priv->tx_cons++;
- txcomplete++;
- ready--;
- }
- if (unlikely(netif_queue_stopped(priv->dev) &&
- tse_tx_avail(priv) > TSE_TX_THRESH(priv))) {
- netif_tx_lock(priv->dev);
- if (netif_queue_stopped(priv->dev) &&
- tse_tx_avail(priv) > TSE_TX_THRESH(priv)) {
- if (netif_msg_tx_done(priv))
- netdev_dbg(priv->dev, "%s: restart transmit\n",
- __func__);
- netif_wake_queue(priv->dev);
- }
- netif_tx_unlock(priv->dev);
- }
- spin_unlock(&priv->tx_lock);
- return txcomplete;
- }
- /* NAPI polling function
- */
- static int tse_poll(struct napi_struct *napi, int budget)
- {
- struct altera_tse_private *priv =
- container_of(napi, struct altera_tse_private, napi);
- int rxcomplete = 0;
- unsigned long int flags;
- tse_tx_complete(priv);
- rxcomplete = tse_rx(priv, budget);
- if (rxcomplete < budget) {
- napi_complete(napi);
- netdev_dbg(priv->dev,
- "NAPI Complete, did %d packets with budget %d\n",
- rxcomplete, budget);
- spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
- priv->dmaops->enable_rxirq(priv);
- priv->dmaops->enable_txirq(priv);
- spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
- }
- return rxcomplete;
- }
- /* DMA TX & RX FIFO interrupt routing
- */
- static irqreturn_t altera_isr(int irq, void *dev_id)
- {
- struct net_device *dev = dev_id;
- struct altera_tse_private *priv;
- if (unlikely(!dev)) {
- pr_err("%s: invalid dev pointer\n", __func__);
- return IRQ_NONE;
- }
- priv = netdev_priv(dev);
- spin_lock(&priv->rxdma_irq_lock);
- /* reset IRQs */
- priv->dmaops->clear_rxirq(priv);
- priv->dmaops->clear_txirq(priv);
- spin_unlock(&priv->rxdma_irq_lock);
- if (likely(napi_schedule_prep(&priv->napi))) {
- spin_lock(&priv->rxdma_irq_lock);
- priv->dmaops->disable_rxirq(priv);
- priv->dmaops->disable_txirq(priv);
- spin_unlock(&priv->rxdma_irq_lock);
- __napi_schedule(&priv->napi);
- }
- return IRQ_HANDLED;
- }
- /* Transmit a packet (called by the kernel). Dispatches
- * either the SGDMA method for transmitting or the
- * MSGDMA method, assumes no scatter/gather support,
- * implying an assumption that there's only one
- * physically contiguous fragment starting at
- * skb->data, for length of skb_headlen(skb).
- */
- static int tse_start_xmit(struct sk_buff *skb, struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- unsigned int txsize = priv->tx_ring_size;
- unsigned int entry;
- struct tse_buffer *buffer = NULL;
- int nfrags = skb_shinfo(skb)->nr_frags;
- unsigned int nopaged_len = skb_headlen(skb);
- enum netdev_tx ret = NETDEV_TX_OK;
- dma_addr_t dma_addr;
- spin_lock_bh(&priv->tx_lock);
- if (unlikely(tse_tx_avail(priv) < nfrags + 1)) {
- if (!netif_queue_stopped(dev)) {
- netif_stop_queue(dev);
- /* This is a hard error, log it. */
- netdev_err(priv->dev,
- "%s: Tx list full when queue awake\n",
- __func__);
- }
- ret = NETDEV_TX_BUSY;
- goto out;
- }
- /* Map the first skb fragment */
- entry = priv->tx_prod % txsize;
- buffer = &priv->tx_ring[entry];
- dma_addr = dma_map_single(priv->device, skb->data, nopaged_len,
- DMA_TO_DEVICE);
- if (dma_mapping_error(priv->device, dma_addr)) {
- netdev_err(priv->dev, "%s: DMA mapping error\n", __func__);
- ret = NETDEV_TX_OK;
- goto out;
- }
- buffer->skb = skb;
- buffer->dma_addr = dma_addr;
- buffer->len = nopaged_len;
- /* Push data out of the cache hierarchy into main memory */
- dma_sync_single_for_device(priv->device, buffer->dma_addr,
- buffer->len, DMA_TO_DEVICE);
- priv->dmaops->tx_buffer(priv, buffer);
- skb_tx_timestamp(skb);
- priv->tx_prod++;
- dev->stats.tx_bytes += skb->len;
- if (unlikely(tse_tx_avail(priv) <= TXQUEUESTOP_THRESHHOLD)) {
- if (netif_msg_hw(priv))
- netdev_dbg(priv->dev, "%s: stop transmitted packets\n",
- __func__);
- netif_stop_queue(dev);
- }
- out:
- spin_unlock_bh(&priv->tx_lock);
- return ret;
- }
- /* Called every time the controller might need to be made
- * aware of new link state. The PHY code conveys this
- * information through variables in the phydev structure, and this
- * function converts those variables into the appropriate
- * register values, and can bring down the device if needed.
- */
- static void altera_tse_adjust_link(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- struct phy_device *phydev = priv->phydev;
- int new_state = 0;
- /* only change config if there is a link */
- spin_lock(&priv->mac_cfg_lock);
- if (phydev->link) {
- /* Read old config */
- u32 cfg_reg = ioread32(&priv->mac_dev->command_config);
- /* Check duplex */
- if (phydev->duplex != priv->oldduplex) {
- new_state = 1;
- if (!(phydev->duplex))
- cfg_reg |= MAC_CMDCFG_HD_ENA;
- else
- cfg_reg &= ~MAC_CMDCFG_HD_ENA;
- netdev_dbg(priv->dev, "%s: Link duplex = 0x%x\n",
- dev->name, phydev->duplex);
- priv->oldduplex = phydev->duplex;
- }
- /* Check speed */
- if (phydev->speed != priv->oldspeed) {
- new_state = 1;
- switch (phydev->speed) {
- case 1000:
- cfg_reg |= MAC_CMDCFG_ETH_SPEED;
- cfg_reg &= ~MAC_CMDCFG_ENA_10;
- break;
- case 100:
- cfg_reg &= ~MAC_CMDCFG_ETH_SPEED;
- cfg_reg &= ~MAC_CMDCFG_ENA_10;
- break;
- case 10:
- cfg_reg &= ~MAC_CMDCFG_ETH_SPEED;
- cfg_reg |= MAC_CMDCFG_ENA_10;
- break;
- default:
- if (netif_msg_link(priv))
- netdev_warn(dev, "Speed (%d) is not 10/100/1000!\n",
- phydev->speed);
- break;
- }
- priv->oldspeed = phydev->speed;
- }
- iowrite32(cfg_reg, &priv->mac_dev->command_config);
- if (!priv->oldlink) {
- new_state = 1;
- priv->oldlink = 1;
- }
- } else if (priv->oldlink) {
- new_state = 1;
- priv->oldlink = 0;
- priv->oldspeed = 0;
- priv->oldduplex = -1;
- }
- if (new_state && netif_msg_link(priv))
- phy_print_status(phydev);
- spin_unlock(&priv->mac_cfg_lock);
- }
- static struct phy_device *connect_local_phy(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- struct phy_device *phydev = NULL;
- char phy_id_fmt[MII_BUS_ID_SIZE + 3];
- if (priv->phy_addr != POLL_PHY) {
- snprintf(phy_id_fmt, MII_BUS_ID_SIZE + 3, PHY_ID_FMT,
- priv->mdio->id, priv->phy_addr);
- netdev_dbg(dev, "trying to attach to %s\n", phy_id_fmt);
- phydev = phy_connect(dev, phy_id_fmt, &altera_tse_adjust_link,
- priv->phy_iface);
- if (IS_ERR(phydev)) {
- netdev_err(dev, "Could not attach to PHY\n");
- phydev = NULL;
- }
- } else {
- int ret;
- phydev = phy_find_first(priv->mdio);
- if (phydev == NULL) {
- netdev_err(dev, "No PHY found\n");
- return phydev;
- }
- ret = phy_connect_direct(dev, phydev, &altera_tse_adjust_link,
- priv->phy_iface);
- if (ret != 0) {
- netdev_err(dev, "Could not attach to PHY\n");
- phydev = NULL;
- }
- }
- return phydev;
- }
- static int altera_tse_phy_get_addr_mdio_create(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- struct device_node *np = priv->device->of_node;
- int ret = 0;
- priv->phy_iface = of_get_phy_mode(np);
- /* Avoid get phy addr and create mdio if no phy is present */
- if (!priv->phy_iface)
- return 0;
- /* try to get PHY address from device tree, use PHY autodetection if
- * no valid address is given
- */
- if (of_property_read_u32(priv->device->of_node, "phy-addr",
- &priv->phy_addr)) {
- priv->phy_addr = POLL_PHY;
- }
- if (!((priv->phy_addr == POLL_PHY) ||
- ((priv->phy_addr >= 0) && (priv->phy_addr < PHY_MAX_ADDR)))) {
- netdev_err(dev, "invalid phy-addr specified %d\n",
- priv->phy_addr);
- return -ENODEV;
- }
- /* Create/attach to MDIO bus */
- ret = altera_tse_mdio_create(dev,
- atomic_add_return(1, &instance_count));
- if (ret)
- return -ENODEV;
- return 0;
- }
- /* Initialize driver's PHY state, and attach to the PHY
- */
- static int init_phy(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- struct phy_device *phydev;
- struct device_node *phynode;
- bool fixed_link = false;
- int rc = 0;
- /* Avoid init phy in case of no phy present */
- if (!priv->phy_iface)
- return 0;
- priv->oldlink = 0;
- priv->oldspeed = 0;
- priv->oldduplex = -1;
- phynode = of_parse_phandle(priv->device->of_node, "phy-handle", 0);
- if (!phynode) {
- /* check if a fixed-link is defined in device-tree */
- if (of_phy_is_fixed_link(priv->device->of_node)) {
- rc = of_phy_register_fixed_link(priv->device->of_node);
- if (rc < 0) {
- netdev_err(dev, "cannot register fixed PHY\n");
- return rc;
- }
- /* In the case of a fixed PHY, the DT node associated
- * to the PHY is the Ethernet MAC DT node.
- */
- phynode = of_node_get(priv->device->of_node);
- fixed_link = true;
- netdev_dbg(dev, "fixed-link detected\n");
- phydev = of_phy_connect(dev, phynode,
- &altera_tse_adjust_link,
- 0, priv->phy_iface);
- } else {
- netdev_dbg(dev, "no phy-handle found\n");
- if (!priv->mdio) {
- netdev_err(dev, "No phy-handle nor local mdio specified\n");
- return -ENODEV;
- }
- phydev = connect_local_phy(dev);
- }
- } else {
- netdev_dbg(dev, "phy-handle found\n");
- phydev = of_phy_connect(dev, phynode,
- &altera_tse_adjust_link, 0, priv->phy_iface);
- }
- if (!phydev) {
- netdev_err(dev, "Could not find the PHY\n");
- return -ENODEV;
- }
- /* Stop Advertising 1000BASE Capability if interface is not GMII
- * Note: Checkpatch throws CHECKs for the camel case defines below,
- * it's ok to ignore.
- */
- if ((priv->phy_iface == PHY_INTERFACE_MODE_MII) ||
- (priv->phy_iface == PHY_INTERFACE_MODE_RMII))
- phydev->advertising &= ~(SUPPORTED_1000baseT_Half |
- SUPPORTED_1000baseT_Full);
- /* Broken HW is sometimes missing the pull-up resistor on the
- * MDIO line, which results in reads to non-existent devices returning
- * 0 rather than 0xffff. Catch this here and treat 0 as a non-existent
- * device as well. If a fixed-link is used the phy_id is always 0.
- * Note: phydev->phy_id is the result of reading the UID PHY registers.
- */
- if ((phydev->phy_id == 0) && !fixed_link) {
- netdev_err(dev, "Bad PHY UID 0x%08x\n", phydev->phy_id);
- phy_disconnect(phydev);
- return -ENODEV;
- }
- netdev_dbg(dev, "attached to PHY %d UID 0x%08x Link = %d\n",
- phydev->addr, phydev->phy_id, phydev->link);
- priv->phydev = phydev;
- return 0;
- }
- static void tse_update_mac_addr(struct altera_tse_private *priv, u8 *addr)
- {
- u32 msb;
- u32 lsb;
- msb = (addr[3] << 24) | (addr[2] << 16) | (addr[1] << 8) | addr[0];
- lsb = ((addr[5] << 8) | addr[4]) & 0xffff;
- /* Set primary MAC address */
- csrwr32(msb, priv->mac_dev, tse_csroffs(mac_addr_0));
- csrwr32(lsb, priv->mac_dev, tse_csroffs(mac_addr_1));
- }
- /* MAC software reset.
- * When reset is triggered, the MAC function completes the current
- * transmission or reception, and subsequently disables the transmit and
- * receive logic, flushes the receive FIFO buffer, and resets the statistics
- * counters.
- */
- static int reset_mac(struct altera_tse_private *priv)
- {
- int counter;
- u32 dat;
- dat = csrrd32(priv->mac_dev, tse_csroffs(command_config));
- dat &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA);
- dat |= MAC_CMDCFG_SW_RESET | MAC_CMDCFG_CNT_RESET;
- csrwr32(dat, priv->mac_dev, tse_csroffs(command_config));
- counter = 0;
- while (counter++ < ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) {
- if (tse_bit_is_clear(priv->mac_dev, tse_csroffs(command_config),
- MAC_CMDCFG_SW_RESET))
- break;
- udelay(1);
- }
- if (counter >= ALTERA_TSE_SW_RESET_WATCHDOG_CNTR) {
- dat = csrrd32(priv->mac_dev, tse_csroffs(command_config));
- dat &= ~MAC_CMDCFG_SW_RESET;
- csrwr32(dat, priv->mac_dev, tse_csroffs(command_config));
- return -1;
- }
- return 0;
- }
- /* Initialize MAC core registers
- */
- static int init_mac(struct altera_tse_private *priv)
- {
- unsigned int cmd = 0;
- u32 frm_length;
- /* Setup Rx FIFO */
- csrwr32(priv->rx_fifo_depth - ALTERA_TSE_RX_SECTION_EMPTY,
- priv->mac_dev, tse_csroffs(rx_section_empty));
- csrwr32(ALTERA_TSE_RX_SECTION_FULL, priv->mac_dev,
- tse_csroffs(rx_section_full));
- csrwr32(ALTERA_TSE_RX_ALMOST_EMPTY, priv->mac_dev,
- tse_csroffs(rx_almost_empty));
- csrwr32(ALTERA_TSE_RX_ALMOST_FULL, priv->mac_dev,
- tse_csroffs(rx_almost_full));
- /* Setup Tx FIFO */
- csrwr32(priv->tx_fifo_depth - ALTERA_TSE_TX_SECTION_EMPTY,
- priv->mac_dev, tse_csroffs(tx_section_empty));
- csrwr32(ALTERA_TSE_TX_SECTION_FULL, priv->mac_dev,
- tse_csroffs(tx_section_full));
- csrwr32(ALTERA_TSE_TX_ALMOST_EMPTY, priv->mac_dev,
- tse_csroffs(tx_almost_empty));
- csrwr32(ALTERA_TSE_TX_ALMOST_FULL, priv->mac_dev,
- tse_csroffs(tx_almost_full));
- /* MAC Address Configuration */
- tse_update_mac_addr(priv, priv->dev->dev_addr);
- /* MAC Function Configuration */
- frm_length = ETH_HLEN + priv->dev->mtu + ETH_FCS_LEN;
- csrwr32(frm_length, priv->mac_dev, tse_csroffs(frm_length));
- csrwr32(ALTERA_TSE_TX_IPG_LENGTH, priv->mac_dev,
- tse_csroffs(tx_ipg_length));
- /* Disable RX/TX shift 16 for alignment of all received frames on 16-bit
- * start address
- */
- tse_set_bit(priv->mac_dev, tse_csroffs(rx_cmd_stat),
- ALTERA_TSE_RX_CMD_STAT_RX_SHIFT16);
- tse_clear_bit(priv->mac_dev, tse_csroffs(tx_cmd_stat),
- ALTERA_TSE_TX_CMD_STAT_TX_SHIFT16 |
- ALTERA_TSE_TX_CMD_STAT_OMIT_CRC);
- /* Set the MAC options */
- cmd = csrrd32(priv->mac_dev, tse_csroffs(command_config));
- cmd &= ~MAC_CMDCFG_PAD_EN; /* No padding Removal on Receive */
- cmd &= ~MAC_CMDCFG_CRC_FWD; /* CRC Removal */
- cmd |= MAC_CMDCFG_RX_ERR_DISC; /* Automatically discard frames
- * with CRC errors
- */
- cmd |= MAC_CMDCFG_CNTL_FRM_ENA;
- cmd &= ~MAC_CMDCFG_TX_ENA;
- cmd &= ~MAC_CMDCFG_RX_ENA;
- /* Default speed and duplex setting, full/100 */
- cmd &= ~MAC_CMDCFG_HD_ENA;
- cmd &= ~MAC_CMDCFG_ETH_SPEED;
- cmd &= ~MAC_CMDCFG_ENA_10;
- csrwr32(cmd, priv->mac_dev, tse_csroffs(command_config));
- csrwr32(ALTERA_TSE_PAUSE_QUANTA, priv->mac_dev,
- tse_csroffs(pause_quanta));
- if (netif_msg_hw(priv))
- dev_dbg(priv->device,
- "MAC post-initialization: CMD_CONFIG = 0x%08x\n", cmd);
- return 0;
- }
- /* Start/stop MAC transmission logic
- */
- static void tse_set_mac(struct altera_tse_private *priv, bool enable)
- {
- u32 value = csrrd32(priv->mac_dev, tse_csroffs(command_config));
- if (enable)
- value |= MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA;
- else
- value &= ~(MAC_CMDCFG_TX_ENA | MAC_CMDCFG_RX_ENA);
- csrwr32(value, priv->mac_dev, tse_csroffs(command_config));
- }
- /* Change the MTU
- */
- static int tse_change_mtu(struct net_device *dev, int new_mtu)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- unsigned int max_mtu = priv->max_mtu;
- unsigned int min_mtu = ETH_ZLEN + ETH_FCS_LEN;
- if (netif_running(dev)) {
- netdev_err(dev, "must be stopped to change its MTU\n");
- return -EBUSY;
- }
- if ((new_mtu < min_mtu) || (new_mtu > max_mtu)) {
- netdev_err(dev, "invalid MTU, max MTU is: %u\n", max_mtu);
- return -EINVAL;
- }
- dev->mtu = new_mtu;
- netdev_update_features(dev);
- return 0;
- }
- static void altera_tse_set_mcfilter(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- int i;
- struct netdev_hw_addr *ha;
- /* clear the hash filter */
- for (i = 0; i < 64; i++)
- csrwr32(0, priv->mac_dev, tse_csroffs(hash_table) + i * 4);
- netdev_for_each_mc_addr(ha, dev) {
- unsigned int hash = 0;
- int mac_octet;
- for (mac_octet = 5; mac_octet >= 0; mac_octet--) {
- unsigned char xor_bit = 0;
- unsigned char octet = ha->addr[mac_octet];
- unsigned int bitshift;
- for (bitshift = 0; bitshift < 8; bitshift++)
- xor_bit ^= ((octet >> bitshift) & 0x01);
- hash = (hash << 1) | xor_bit;
- }
- csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + hash * 4);
- }
- }
- static void altera_tse_set_mcfilterall(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- int i;
- /* set the hash filter */
- for (i = 0; i < 64; i++)
- csrwr32(1, priv->mac_dev, tse_csroffs(hash_table) + i * 4);
- }
- /* Set or clear the multicast filter for this adaptor
- */
- static void tse_set_rx_mode_hashfilter(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- spin_lock(&priv->mac_cfg_lock);
- if (dev->flags & IFF_PROMISC)
- tse_set_bit(priv->mac_dev, tse_csroffs(command_config),
- MAC_CMDCFG_PROMIS_EN);
- if (dev->flags & IFF_ALLMULTI)
- altera_tse_set_mcfilterall(dev);
- else
- altera_tse_set_mcfilter(dev);
- spin_unlock(&priv->mac_cfg_lock);
- }
- /* Set or clear the multicast filter for this adaptor
- */
- static void tse_set_rx_mode(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- spin_lock(&priv->mac_cfg_lock);
- if ((dev->flags & IFF_PROMISC) || (dev->flags & IFF_ALLMULTI) ||
- !netdev_mc_empty(dev) || !netdev_uc_empty(dev))
- tse_set_bit(priv->mac_dev, tse_csroffs(command_config),
- MAC_CMDCFG_PROMIS_EN);
- else
- tse_clear_bit(priv->mac_dev, tse_csroffs(command_config),
- MAC_CMDCFG_PROMIS_EN);
- spin_unlock(&priv->mac_cfg_lock);
- }
- /* Open and initialize the interface
- */
- static int tse_open(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- int ret = 0;
- int i;
- unsigned long int flags;
- /* Reset and configure TSE MAC and probe associated PHY */
- ret = priv->dmaops->init_dma(priv);
- if (ret != 0) {
- netdev_err(dev, "Cannot initialize DMA\n");
- goto phy_error;
- }
- if (netif_msg_ifup(priv))
- netdev_warn(dev, "device MAC address %pM\n",
- dev->dev_addr);
- if ((priv->revision < 0xd00) || (priv->revision > 0xe00))
- netdev_warn(dev, "TSE revision %x\n", priv->revision);
- spin_lock(&priv->mac_cfg_lock);
- ret = reset_mac(priv);
- /* Note that reset_mac will fail if the clocks are gated by the PHY
- * due to the PHY being put into isolation or power down mode.
- * This is not an error if reset fails due to no clock.
- */
- if (ret)
- netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret);
- ret = init_mac(priv);
- spin_unlock(&priv->mac_cfg_lock);
- if (ret) {
- netdev_err(dev, "Cannot init MAC core (error: %d)\n", ret);
- goto alloc_skbuf_error;
- }
- priv->dmaops->reset_dma(priv);
- /* Create and initialize the TX/RX descriptors chains. */
- priv->rx_ring_size = dma_rx_num;
- priv->tx_ring_size = dma_tx_num;
- ret = alloc_init_skbufs(priv);
- if (ret) {
- netdev_err(dev, "DMA descriptors initialization failed\n");
- goto alloc_skbuf_error;
- }
- /* Register RX interrupt */
- ret = request_irq(priv->rx_irq, altera_isr, IRQF_SHARED,
- dev->name, dev);
- if (ret) {
- netdev_err(dev, "Unable to register RX interrupt %d\n",
- priv->rx_irq);
- goto init_error;
- }
- /* Register TX interrupt */
- ret = request_irq(priv->tx_irq, altera_isr, IRQF_SHARED,
- dev->name, dev);
- if (ret) {
- netdev_err(dev, "Unable to register TX interrupt %d\n",
- priv->tx_irq);
- goto tx_request_irq_error;
- }
- /* Enable DMA interrupts */
- spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
- priv->dmaops->enable_rxirq(priv);
- priv->dmaops->enable_txirq(priv);
- /* Setup RX descriptor chain */
- for (i = 0; i < priv->rx_ring_size; i++)
- priv->dmaops->add_rx_desc(priv, &priv->rx_ring[i]);
- spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
- if (priv->phydev)
- phy_start(priv->phydev);
- napi_enable(&priv->napi);
- netif_start_queue(dev);
- priv->dmaops->start_rxdma(priv);
- /* Start MAC Rx/Tx */
- spin_lock(&priv->mac_cfg_lock);
- tse_set_mac(priv, true);
- spin_unlock(&priv->mac_cfg_lock);
- return 0;
- tx_request_irq_error:
- free_irq(priv->rx_irq, dev);
- init_error:
- free_skbufs(dev);
- alloc_skbuf_error:
- phy_error:
- return ret;
- }
- /* Stop TSE MAC interface and put the device in an inactive state
- */
- static int tse_shutdown(struct net_device *dev)
- {
- struct altera_tse_private *priv = netdev_priv(dev);
- int ret;
- unsigned long int flags;
- /* Stop the PHY */
- if (priv->phydev)
- phy_stop(priv->phydev);
- netif_stop_queue(dev);
- napi_disable(&priv->napi);
- /* Disable DMA interrupts */
- spin_lock_irqsave(&priv->rxdma_irq_lock, flags);
- priv->dmaops->disable_rxirq(priv);
- priv->dmaops->disable_txirq(priv);
- spin_unlock_irqrestore(&priv->rxdma_irq_lock, flags);
- /* Free the IRQ lines */
- free_irq(priv->rx_irq, dev);
- free_irq(priv->tx_irq, dev);
- /* disable and reset the MAC, empties fifo */
- spin_lock(&priv->mac_cfg_lock);
- spin_lock(&priv->tx_lock);
- ret = reset_mac(priv);
- /* Note that reset_mac will fail if the clocks are gated by the PHY
- * due to the PHY being put into isolation or power down mode.
- * This is not an error if reset fails due to no clock.
- */
- if (ret)
- netdev_dbg(dev, "Cannot reset MAC core (error: %d)\n", ret);
- priv->dmaops->reset_dma(priv);
- free_skbufs(dev);
- spin_unlock(&priv->tx_lock);
- spin_unlock(&priv->mac_cfg_lock);
- priv->dmaops->uninit_dma(priv);
- return 0;
- }
- static struct net_device_ops altera_tse_netdev_ops = {
- .ndo_open = tse_open,
- .ndo_stop = tse_shutdown,
- .ndo_start_xmit = tse_start_xmit,
- .ndo_set_mac_address = eth_mac_addr,
- .ndo_set_rx_mode = tse_set_rx_mode,
- .ndo_change_mtu = tse_change_mtu,
- .ndo_validate_addr = eth_validate_addr,
- };
- static int request_and_map(struct platform_device *pdev, const char *name,
- struct resource **res, void __iomem **ptr)
- {
- struct resource *region;
- struct device *device = &pdev->dev;
- *res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
- if (*res == NULL) {
- dev_err(device, "resource %s not defined\n", name);
- return -ENODEV;
- }
- region = devm_request_mem_region(device, (*res)->start,
- resource_size(*res), dev_name(device));
- if (region == NULL) {
- dev_err(device, "unable to request %s\n", name);
- return -EBUSY;
- }
- *ptr = devm_ioremap_nocache(device, region->start,
- resource_size(region));
- if (*ptr == NULL) {
- dev_err(device, "ioremap_nocache of %s failed!", name);
- return -ENOMEM;
- }
- return 0;
- }
- /* Probe Altera TSE MAC device
- */
- static int altera_tse_probe(struct platform_device *pdev)
- {
- struct net_device *ndev;
- int ret = -ENODEV;
- struct resource *control_port;
- struct resource *dma_res;
- struct altera_tse_private *priv;
- const unsigned char *macaddr;
- void __iomem *descmap;
- const struct of_device_id *of_id = NULL;
- ndev = alloc_etherdev(sizeof(struct altera_tse_private));
- if (!ndev) {
- dev_err(&pdev->dev, "Could not allocate network device\n");
- return -ENODEV;
- }
- SET_NETDEV_DEV(ndev, &pdev->dev);
- priv = netdev_priv(ndev);
- priv->device = &pdev->dev;
- priv->dev = ndev;
- priv->msg_enable = netif_msg_init(debug, default_msg_level);
- of_id = of_match_device(altera_tse_ids, &pdev->dev);
- if (of_id)
- priv->dmaops = (struct altera_dmaops *)of_id->data;
- if (priv->dmaops &&
- priv->dmaops->altera_dtype == ALTERA_DTYPE_SGDMA) {
- /* Get the mapped address to the SGDMA descriptor memory */
- ret = request_and_map(pdev, "s1", &dma_res, &descmap);
- if (ret)
- goto err_free_netdev;
- /* Start of that memory is for transmit descriptors */
- priv->tx_dma_desc = descmap;
- /* First half is for tx descriptors, other half for tx */
- priv->txdescmem = resource_size(dma_res)/2;
- priv->txdescmem_busaddr = (dma_addr_t)dma_res->start;
- priv->rx_dma_desc = (void __iomem *)((uintptr_t)(descmap +
- priv->txdescmem));
- priv->rxdescmem = resource_size(dma_res)/2;
- priv->rxdescmem_busaddr = dma_res->start;
- priv->rxdescmem_busaddr += priv->txdescmem;
- if (upper_32_bits(priv->rxdescmem_busaddr)) {
- dev_dbg(priv->device,
- "SGDMA bus addresses greater than 32-bits\n");
- goto err_free_netdev;
- }
- if (upper_32_bits(priv->txdescmem_busaddr)) {
- dev_dbg(priv->device,
- "SGDMA bus addresses greater than 32-bits\n");
- goto err_free_netdev;
- }
- } else if (priv->dmaops &&
- priv->dmaops->altera_dtype == ALTERA_DTYPE_MSGDMA) {
- ret = request_and_map(pdev, "rx_resp", &dma_res,
- &priv->rx_dma_resp);
- if (ret)
- goto err_free_netdev;
- ret = request_and_map(pdev, "tx_desc", &dma_res,
- &priv->tx_dma_desc);
- if (ret)
- goto err_free_netdev;
- priv->txdescmem = resource_size(dma_res);
- priv->txdescmem_busaddr = dma_res->start;
- ret = request_and_map(pdev, "rx_desc", &dma_res,
- &priv->rx_dma_desc);
- if (ret)
- goto err_free_netdev;
- priv->rxdescmem = resource_size(dma_res);
- priv->rxdescmem_busaddr = dma_res->start;
- } else {
- goto err_free_netdev;
- }
- if (!dma_set_mask(priv->device, DMA_BIT_MASK(priv->dmaops->dmamask)))
- dma_set_coherent_mask(priv->device,
- DMA_BIT_MASK(priv->dmaops->dmamask));
- else if (!dma_set_mask(priv->device, DMA_BIT_MASK(32)))
- dma_set_coherent_mask(priv->device, DMA_BIT_MASK(32));
- else
- goto err_free_netdev;
- /* MAC address space */
- ret = request_and_map(pdev, "control_port", &control_port,
- (void __iomem **)&priv->mac_dev);
- if (ret)
- goto err_free_netdev;
- /* xSGDMA Rx Dispatcher address space */
- ret = request_and_map(pdev, "rx_csr", &dma_res,
- &priv->rx_dma_csr);
- if (ret)
- goto err_free_netdev;
- /* xSGDMA Tx Dispatcher address space */
- ret = request_and_map(pdev, "tx_csr", &dma_res,
- &priv->tx_dma_csr);
- if (ret)
- goto err_free_netdev;
- /* Rx IRQ */
- priv->rx_irq = platform_get_irq_byname(pdev, "rx_irq");
- if (priv->rx_irq == -ENXIO) {
- dev_err(&pdev->dev, "cannot obtain Rx IRQ\n");
- ret = -ENXIO;
- goto err_free_netdev;
- }
- /* Tx IRQ */
- priv->tx_irq = platform_get_irq_byname(pdev, "tx_irq");
- if (priv->tx_irq == -ENXIO) {
- dev_err(&pdev->dev, "cannot obtain Tx IRQ\n");
- ret = -ENXIO;
- goto err_free_netdev;
- }
- /* get FIFO depths from device tree */
- if (of_property_read_u32(pdev->dev.of_node, "rx-fifo-depth",
- &priv->rx_fifo_depth)) {
- dev_err(&pdev->dev, "cannot obtain rx-fifo-depth\n");
- ret = -ENXIO;
- goto err_free_netdev;
- }
- if (of_property_read_u32(pdev->dev.of_node, "tx-fifo-depth",
- &priv->tx_fifo_depth)) {
- dev_err(&pdev->dev, "cannot obtain tx-fifo-depth\n");
- ret = -ENXIO;
- goto err_free_netdev;
- }
- /* get hash filter settings for this instance */
- priv->hash_filter =
- of_property_read_bool(pdev->dev.of_node,
- "altr,has-hash-multicast-filter");
- /* Set hash filter to not set for now until the
- * multicast filter receive issue is debugged
- */
- priv->hash_filter = 0;
- /* get supplemental address settings for this instance */
- priv->added_unicast =
- of_property_read_bool(pdev->dev.of_node,
- "altr,has-supplementary-unicast");
- /* Max MTU is 1500, ETH_DATA_LEN */
- priv->max_mtu = ETH_DATA_LEN;
- /* Get the max mtu from the device tree. Note that the
- * "max-frame-size" parameter is actually max mtu. Definition
- * in the ePAPR v1.1 spec and usage differ, so go with usage.
- */
- of_property_read_u32(pdev->dev.of_node, "max-frame-size",
- &priv->max_mtu);
- /* The DMA buffer size already accounts for an alignment bias
- * to avoid unaligned access exceptions for the NIOS processor,
- */
- priv->rx_dma_buf_sz = ALTERA_RXDMABUFFER_SIZE;
- /* get default MAC address from device tree */
- macaddr = of_get_mac_address(pdev->dev.of_node);
- if (macaddr)
- ether_addr_copy(ndev->dev_addr, macaddr);
- else
- eth_hw_addr_random(ndev);
- /* get phy addr and create mdio */
- ret = altera_tse_phy_get_addr_mdio_create(ndev);
- if (ret)
- goto err_free_netdev;
- /* initialize netdev */
- ndev->mem_start = control_port->start;
- ndev->mem_end = control_port->end;
- ndev->netdev_ops = &altera_tse_netdev_ops;
- altera_tse_set_ethtool_ops(ndev);
- altera_tse_netdev_ops.ndo_set_rx_mode = tse_set_rx_mode;
- if (priv->hash_filter)
- altera_tse_netdev_ops.ndo_set_rx_mode =
- tse_set_rx_mode_hashfilter;
- /* Scatter/gather IO is not supported,
- * so it is turned off
- */
- ndev->hw_features &= ~NETIF_F_SG;
- ndev->features |= ndev->hw_features | NETIF_F_HIGHDMA;
- /* VLAN offloading of tagging, stripping and filtering is not
- * supported by hardware, but driver will accommodate the
- * extra 4-byte VLAN tag for processing by upper layers
- */
- ndev->features |= NETIF_F_HW_VLAN_CTAG_RX;
- /* setup NAPI interface */
- netif_napi_add(ndev, &priv->napi, tse_poll, NAPI_POLL_WEIGHT);
- spin_lock_init(&priv->mac_cfg_lock);
- spin_lock_init(&priv->tx_lock);
- spin_lock_init(&priv->rxdma_irq_lock);
- netif_carrier_off(ndev);
- ret = register_netdev(ndev);
- if (ret) {
- dev_err(&pdev->dev, "failed to register TSE net device\n");
- goto err_register_netdev;
- }
- platform_set_drvdata(pdev, ndev);
- priv->revision = ioread32(&priv->mac_dev->megacore_revision);
- if (netif_msg_probe(priv))
- dev_info(&pdev->dev, "Altera TSE MAC version %d.%d at 0x%08lx irq %d/%d\n",
- (priv->revision >> 8) & 0xff,
- priv->revision & 0xff,
- (unsigned long) control_port->start, priv->rx_irq,
- priv->tx_irq);
- ret = init_phy(ndev);
- if (ret != 0) {
- netdev_err(ndev, "Cannot attach to PHY (error: %d)\n", ret);
- goto err_init_phy;
- }
- return 0;
- err_init_phy:
- unregister_netdev(ndev);
- err_register_netdev:
- netif_napi_del(&priv->napi);
- altera_tse_mdio_destroy(ndev);
- err_free_netdev:
- free_netdev(ndev);
- return ret;
- }
- /* Remove Altera TSE MAC device
- */
- static int altera_tse_remove(struct platform_device *pdev)
- {
- struct net_device *ndev = platform_get_drvdata(pdev);
- struct altera_tse_private *priv = netdev_priv(ndev);
- if (priv->phydev)
- phy_disconnect(priv->phydev);
- platform_set_drvdata(pdev, NULL);
- altera_tse_mdio_destroy(ndev);
- unregister_netdev(ndev);
- free_netdev(ndev);
- return 0;
- }
- static const struct altera_dmaops altera_dtype_sgdma = {
- .altera_dtype = ALTERA_DTYPE_SGDMA,
- .dmamask = 32,
- .reset_dma = sgdma_reset,
- .enable_txirq = sgdma_enable_txirq,
- .enable_rxirq = sgdma_enable_rxirq,
- .disable_txirq = sgdma_disable_txirq,
- .disable_rxirq = sgdma_disable_rxirq,
- .clear_txirq = sgdma_clear_txirq,
- .clear_rxirq = sgdma_clear_rxirq,
- .tx_buffer = sgdma_tx_buffer,
- .tx_completions = sgdma_tx_completions,
- .add_rx_desc = sgdma_add_rx_desc,
- .get_rx_status = sgdma_rx_status,
- .init_dma = sgdma_initialize,
- .uninit_dma = sgdma_uninitialize,
- .start_rxdma = sgdma_start_rxdma,
- };
- static const struct altera_dmaops altera_dtype_msgdma = {
- .altera_dtype = ALTERA_DTYPE_MSGDMA,
- .dmamask = 64,
- .reset_dma = msgdma_reset,
- .enable_txirq = msgdma_enable_txirq,
- .enable_rxirq = msgdma_enable_rxirq,
- .disable_txirq = msgdma_disable_txirq,
- .disable_rxirq = msgdma_disable_rxirq,
- .clear_txirq = msgdma_clear_txirq,
- .clear_rxirq = msgdma_clear_rxirq,
- .tx_buffer = msgdma_tx_buffer,
- .tx_completions = msgdma_tx_completions,
- .add_rx_desc = msgdma_add_rx_desc,
- .get_rx_status = msgdma_rx_status,
- .init_dma = msgdma_initialize,
- .uninit_dma = msgdma_uninitialize,
- .start_rxdma = msgdma_start_rxdma,
- };
- static const struct of_device_id altera_tse_ids[] = {
- { .compatible = "altr,tse-msgdma-1.0", .data = &altera_dtype_msgdma, },
- { .compatible = "altr,tse-1.0", .data = &altera_dtype_sgdma, },
- { .compatible = "ALTR,tse-1.0", .data = &altera_dtype_sgdma, },
- {},
- };
- MODULE_DEVICE_TABLE(of, altera_tse_ids);
- static struct platform_driver altera_tse_driver = {
- .probe = altera_tse_probe,
- .remove = altera_tse_remove,
- .suspend = NULL,
- .resume = NULL,
- .driver = {
- .name = ALTERA_TSE_RESOURCE_NAME,
- .of_match_table = altera_tse_ids,
- },
- };
- module_platform_driver(altera_tse_driver);
- MODULE_AUTHOR("Altera Corporation");
- MODULE_DESCRIPTION("Altera Triple Speed Ethernet MAC driver");
- MODULE_LICENSE("GPL v2");
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