#include <linux/if_vlan.h>
#include <linux/spinlock.h>
#include <linux/mm.h>
+#include <linux/of_mdio.h>
#include <linux/of_platform.h>
#include <linux/ip.h>
#include <linux/tcp.h>
#include <linux/of.h>
#include "gianfar.h"
-#include "gianfar_mii.h"
+#include "fsl_pq_mdio.h"
#define TX_TIMEOUT (1*HZ)
#undef BRIEF_GFAR_ERRORS
void gfar_start(struct net_device *dev);
static void gfar_clear_exact_match(struct net_device *dev);
static void gfar_set_mac_for_addr(struct net_device *dev, int num, u8 *addr);
-
-extern const struct ethtool_ops gfar_ethtool_ops;
+static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd);
MODULE_AUTHOR("Freescale Semiconductor, Inc");
MODULE_DESCRIPTION("Gianfar Ethernet Driver");
MODULE_LICENSE("GPL");
+static const struct net_device_ops gfar_netdev_ops = {
+ .ndo_open = gfar_enet_open,
+ .ndo_start_xmit = gfar_start_xmit,
+ .ndo_stop = gfar_close,
+ .ndo_change_mtu = gfar_change_mtu,
+ .ndo_set_multicast_list = gfar_set_multi,
+ .ndo_tx_timeout = gfar_timeout,
+ .ndo_do_ioctl = gfar_ioctl,
+ .ndo_vlan_rx_register = gfar_vlan_rx_register,
+ .ndo_set_mac_address = eth_mac_addr,
+ .ndo_validate_addr = eth_validate_addr,
+#ifdef CONFIG_NET_POLL_CONTROLLER
+ .ndo_poll_controller = gfar_netpoll,
+#endif
+};
+
/* Returns 1 if incoming frames use an FCB */
static inline int gfar_uses_fcb(struct gfar_private *priv)
{
static int gfar_of_init(struct net_device *dev)
{
- struct device_node *phy, *mdio;
- const unsigned int *id;
const char *model;
const char *ctype;
const void *mac_addr;
- const phandle *ph;
u64 addr, size;
int err = 0;
struct gfar_private *priv = netdev_priv(dev);
struct device_node *np = priv->node;
- char bus_name[MII_BUS_ID_SIZE];
+ const u32 *stash;
+ const u32 *stash_len;
+ const u32 *stash_idx;
if (!np || !of_device_is_available(np))
return -ENODEV;
}
}
+ stash = of_get_property(np, "bd-stash", NULL);
+
+ if(stash) {
+ priv->device_flags |= FSL_GIANFAR_DEV_HAS_BD_STASHING;
+ priv->bd_stash_en = 1;
+ }
+
+ stash_len = of_get_property(np, "rx-stash-len", NULL);
+
+ if (stash_len)
+ priv->rx_stash_size = *stash_len;
+
+ stash_idx = of_get_property(np, "rx-stash-idx", NULL);
+
+ if (stash_idx)
+ priv->rx_stash_index = *stash_idx;
+
+ if (stash_len || stash_idx)
+ priv->device_flags |= FSL_GIANFAR_DEV_HAS_BUF_STASHING;
+
mac_addr = of_get_mac_address(np);
if (mac_addr)
memcpy(dev->dev_addr, mac_addr, MAC_ADDR_LEN);
if (of_get_property(np, "fsl,magic-packet", NULL))
priv->device_flags |= FSL_GIANFAR_DEV_HAS_MAGIC_PACKET;
- ph = of_get_property(np, "phy-handle", NULL);
- if (ph == NULL) {
- u32 *fixed_link;
-
- fixed_link = (u32 *)of_get_property(np, "fixed-link", NULL);
- if (!fixed_link) {
- err = -ENODEV;
- goto err_out;
- }
-
- snprintf(priv->phy_bus_id, BUS_ID_SIZE, PHY_ID_FMT, "0",
- fixed_link[0]);
- } else {
- phy = of_find_node_by_phandle(*ph);
-
- if (phy == NULL) {
- err = -ENODEV;
- goto err_out;
- }
-
- mdio = of_get_parent(phy);
-
- id = of_get_property(phy, "reg", NULL);
-
- of_node_put(phy);
- of_node_put(mdio);
-
- gfar_mdio_bus_name(bus_name, mdio);
- snprintf(priv->phy_bus_id, BUS_ID_SIZE, "%s:%02x",
- bus_name, *id);
- }
+ priv->phy_node = of_parse_phandle(np, "phy-handle", 0);
/* Find the TBI PHY. If it's not there, we don't support SGMII */
- ph = of_get_property(np, "tbi-handle", NULL);
- if (ph) {
- struct device_node *tbi = of_find_node_by_phandle(*ph);
- struct of_device *ofdev;
- struct mii_bus *bus;
-
- if (!tbi)
- return 0;
-
- mdio = of_get_parent(tbi);
- if (!mdio)
- return 0;
-
- ofdev = of_find_device_by_node(mdio);
-
- of_node_put(mdio);
-
- id = of_get_property(tbi, "reg", NULL);
- if (!id)
- return 0;
-
- of_node_put(tbi);
-
- bus = dev_get_drvdata(&ofdev->dev);
-
- priv->tbiphy = bus->phy_map[*id];
- }
+ priv->tbi_node = of_parse_phandle(np, "tbi-handle", 0);
return 0;
return err;
}
+/* Ioctl MII Interface */
+static int gfar_ioctl(struct net_device *dev, struct ifreq *rq, int cmd)
+{
+ struct gfar_private *priv = netdev_priv(dev);
+
+ if (!netif_running(dev))
+ return -EINVAL;
+
+ if (!priv->phydev)
+ return -ENODEV;
+
+ return phy_mii_ioctl(priv->phydev, if_mii(rq), cmd);
+}
+
/* Set up the ethernet device structure, private data,
* and anything else we need before we start */
static int gfar_probe(struct of_device *ofdev,
struct net_device *dev = NULL;
struct gfar_private *priv = NULL;
int err = 0;
- DECLARE_MAC_BUF(mac);
+ int len_devname;
/* Create an ethernet device instance */
dev = alloc_etherdev(sizeof (*priv));
return -ENOMEM;
priv = netdev_priv(dev);
- priv->dev = dev;
+ priv->ndev = dev;
+ priv->ofdev = ofdev;
priv->node = ofdev->node;
+ SET_NETDEV_DEV(dev, &ofdev->dev);
err = gfar_of_init(dev);
/* Reset MAC layer */
gfar_write(&priv->regs->maccfg1, MACCFG1_SOFT_RESET);
+ /* We need to delay at least 3 TX clocks */
+ udelay(2);
+
tempval = (MACCFG1_TX_FLOW | MACCFG1_RX_FLOW);
gfar_write(&priv->regs->maccfg1, tempval);
SET_NETDEV_DEV(dev, &ofdev->dev);
/* Fill in the dev structure */
- dev->open = gfar_enet_open;
- dev->hard_start_xmit = gfar_start_xmit;
- dev->tx_timeout = gfar_timeout;
dev->watchdog_timeo = TX_TIMEOUT;
netif_napi_add(dev, &priv->napi, gfar_poll, GFAR_DEV_WEIGHT);
-#ifdef CONFIG_NET_POLL_CONTROLLER
- dev->poll_controller = gfar_netpoll;
-#endif
- dev->stop = gfar_close;
- dev->change_mtu = gfar_change_mtu;
dev->mtu = 1500;
- dev->set_multicast_list = gfar_set_multi;
+ dev->netdev_ops = &gfar_netdev_ops;
dev->ethtool_ops = &gfar_ethtool_ops;
if (priv->device_flags & FSL_GIANFAR_DEV_HAS_CSUM) {
priv->rx_csum_enable = 1;
- dev->features |= NETIF_F_IP_CSUM;
+ dev->features |= NETIF_F_IP_CSUM | NETIF_F_SG | NETIF_F_HIGHDMA;
} else
priv->rx_csum_enable = 0;
priv->vlgrp = NULL;
- if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN) {
- dev->vlan_rx_register = gfar_vlan_rx_register;
-
+ if (priv->device_flags & FSL_GIANFAR_DEV_HAS_VLAN)
dev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
- }
if (priv->device_flags & FSL_GIANFAR_DEV_HAS_EXTENDED_HASH) {
priv->extended_hash = 1;
priv->hash_width = 8;
priv->hash_regs[0] = &priv->regs->gaddr0;
- priv->hash_regs[1] = &priv->regs->gaddr1;
+ priv->hash_regs[1] = &priv->regs->gaddr1;
priv->hash_regs[2] = &priv->regs->gaddr2;
priv->hash_regs[3] = &priv->regs->gaddr3;
priv->hash_regs[4] = &priv->regs->gaddr4;
priv->rx_buffer_size = DEFAULT_RX_BUFFER_SIZE;
priv->tx_ring_size = DEFAULT_TX_RING_SIZE;
priv->rx_ring_size = DEFAULT_RX_RING_SIZE;
+ priv->num_txbdfree = DEFAULT_TX_RING_SIZE;
priv->txcoalescing = DEFAULT_TX_COALESCE;
priv->txic = DEFAULT_TXIC;
goto register_fail;
}
+ device_init_wakeup(&dev->dev,
+ priv->device_flags & FSL_GIANFAR_DEV_HAS_MAGIC_PACKET);
+
+ /* fill out IRQ number and name fields */
+ len_devname = strlen(dev->name);
+ strncpy(&priv->int_name_tx[0], dev->name, len_devname);
+ if (priv->device_flags & FSL_GIANFAR_DEV_HAS_MULTI_INTR) {
+ strncpy(&priv->int_name_tx[len_devname],
+ "_tx", sizeof("_tx") + 1);
+
+ strncpy(&priv->int_name_rx[0], dev->name, len_devname);
+ strncpy(&priv->int_name_rx[len_devname],
+ "_rx", sizeof("_rx") + 1);
+
+ strncpy(&priv->int_name_er[0], dev->name, len_devname);
+ strncpy(&priv->int_name_er[len_devname],
+ "_er", sizeof("_er") + 1);
+ } else
+ priv->int_name_tx[len_devname] = '\0';
+
/* Create all the sysfs files */
gfar_init_sysfs(dev);
register_fail:
iounmap(priv->regs);
regs_fail:
+ if (priv->phy_node)
+ of_node_put(priv->phy_node);
+ if (priv->tbi_node)
+ of_node_put(priv->tbi_node);
free_netdev(dev);
return err;
}
{
struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
+ if (priv->phy_node)
+ of_node_put(priv->phy_node);
+ if (priv->tbi_node)
+ of_node_put(priv->tbi_node);
+
dev_set_drvdata(&ofdev->dev, NULL);
+ unregister_netdev(priv->ndev);
iounmap(priv->regs);
- free_netdev(priv->dev);
+ free_netdev(priv->ndev);
return 0;
}
static int gfar_suspend(struct of_device *ofdev, pm_message_t state)
{
struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
- struct net_device *dev = priv->dev;
+ struct net_device *dev = priv->ndev;
unsigned long flags;
u32 tempval;
static int gfar_resume(struct of_device *ofdev)
{
struct gfar_private *priv = dev_get_drvdata(&ofdev->dev);
- struct net_device *dev = priv->dev;
+ struct net_device *dev = priv->ndev;
unsigned long flags;
u32 tempval;
int magic_packet = priv->wol_en &&
uint gigabit_support =
priv->device_flags & FSL_GIANFAR_DEV_HAS_GIGABIT ?
SUPPORTED_1000baseT_Full : 0;
- struct phy_device *phydev;
phy_interface_t interface;
priv->oldlink = 0;
interface = gfar_get_interface(dev);
- phydev = phy_connect(dev, priv->phy_bus_id, &adjust_link, 0, interface);
+ priv->phydev = of_phy_connect(dev, priv->phy_node, &adjust_link, 0,
+ interface);
+ if (!priv->phydev)
+ priv->phydev = of_phy_connect_fixed_link(dev, &adjust_link,
+ interface);
+ if (!priv->phydev) {
+ dev_err(&dev->dev, "could not attach to PHY\n");
+ return -ENODEV;
+ }
if (interface == PHY_INTERFACE_MODE_SGMII)
gfar_configure_serdes(dev);
- if (IS_ERR(phydev)) {
- printk(KERN_ERR "%s: Could not attach to PHY\n", dev->name);
- return PTR_ERR(phydev);
- }
-
/* Remove any features not supported by the controller */
- phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
- phydev->advertising = phydev->supported;
-
- priv->phydev = phydev;
+ priv->phydev->supported &= (GFAR_SUPPORTED | gigabit_support);
+ priv->phydev->advertising = priv->phydev->supported;
return 0;
}
static void gfar_configure_serdes(struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
+ struct phy_device *tbiphy;
+
+ if (!priv->tbi_node) {
+ dev_warn(&dev->dev, "error: SGMII mode requires that the "
+ "device tree specify a tbi-handle\n");
+ return;
+ }
- if (!priv->tbiphy) {
- printk(KERN_WARNING "SGMII mode requires that the device "
- "tree specify a tbi-handle\n");
+ tbiphy = of_phy_find_device(priv->tbi_node);
+ if (!tbiphy) {
+ dev_err(&dev->dev, "error: Could not get TBI device\n");
return;
}
* everything for us? Resetting it takes the link down and requires
* several seconds for it to come back.
*/
- if (phy_read(priv->tbiphy, MII_BMSR) & BMSR_LSTATUS)
+ if (phy_read(tbiphy, MII_BMSR) & BMSR_LSTATUS)
return;
/* Single clk mode, mii mode off(for serdes communication) */
- phy_write(priv->tbiphy, MII_TBICON, TBICON_CLK_SELECT);
+ phy_write(tbiphy, MII_TBICON, TBICON_CLK_SELECT);
- phy_write(priv->tbiphy, MII_ADVERTISE,
+ phy_write(tbiphy, MII_ADVERTISE,
ADVERTISE_1000XFULL | ADVERTISE_1000XPAUSE |
ADVERTISE_1000XPSE_ASYM);
- phy_write(priv->tbiphy, MII_BMCR, BMCR_ANENABLE |
+ phy_write(tbiphy, MII_BMCR, BMCR_ANENABLE |
BMCR_ANRESTART | BMCR_FULLDPLX | BMCR_SPEED1000);
}
free_irq(priv->interruptTransmit, dev);
free_irq(priv->interruptReceive, dev);
} else {
- free_irq(priv->interruptTransmit, dev);
+ free_irq(priv->interruptTransmit, dev);
}
free_skb_resources(priv);
- dma_free_coherent(&dev->dev,
+ dma_free_coherent(&priv->ofdev->dev,
sizeof(struct txbd8)*priv->tx_ring_size
+ sizeof(struct rxbd8)*priv->rx_ring_size,
priv->tx_bd_base,
{
struct rxbd8 *rxbdp;
struct txbd8 *txbdp;
- int i;
+ int i, j;
/* Go through all the buffer descriptors and free their data buffers */
txbdp = priv->tx_bd_base;
for (i = 0; i < priv->tx_ring_size; i++) {
-
- if (priv->tx_skbuff[i]) {
- dma_unmap_single(&priv->dev->dev, txbdp->bufPtr,
- txbdp->length,
- DMA_TO_DEVICE);
- dev_kfree_skb_any(priv->tx_skbuff[i]);
- priv->tx_skbuff[i] = NULL;
+ if (!priv->tx_skbuff[i])
+ continue;
+
+ dma_unmap_single(&priv->ofdev->dev, txbdp->bufPtr,
+ txbdp->length, DMA_TO_DEVICE);
+ txbdp->lstatus = 0;
+ for (j = 0; j < skb_shinfo(priv->tx_skbuff[i])->nr_frags; j++) {
+ txbdp++;
+ dma_unmap_page(&priv->ofdev->dev, txbdp->bufPtr,
+ txbdp->length, DMA_TO_DEVICE);
}
-
txbdp++;
+ dev_kfree_skb_any(priv->tx_skbuff[i]);
+ priv->tx_skbuff[i] = NULL;
}
kfree(priv->tx_skbuff);
if(priv->rx_skbuff != NULL) {
for (i = 0; i < priv->rx_ring_size; i++) {
if (priv->rx_skbuff[i]) {
- dma_unmap_single(&priv->dev->dev, rxbdp->bufPtr,
+ dma_unmap_single(&priv->ofdev->dev, rxbdp->bufPtr,
priv->rx_buffer_size,
DMA_FROM_DEVICE);
priv->rx_skbuff[i] = NULL;
}
- rxbdp->status = 0;
- rxbdp->length = 0;
+ rxbdp->lstatus = 0;
rxbdp->bufPtr = 0;
rxbdp++;
struct gfar __iomem *regs = priv->regs;
int err = 0;
u32 rctrl = 0;
+ u32 tctrl = 0;
u32 attrs = 0;
gfar_write(®s->imask, IMASK_INIT_CLEAR);
/* Allocate memory for the buffer descriptors */
- vaddr = (unsigned long) dma_alloc_coherent(&dev->dev,
+ vaddr = (unsigned long) dma_alloc_coherent(&priv->ofdev->dev,
sizeof (struct txbd8) * priv->tx_ring_size +
sizeof (struct rxbd8) * priv->rx_ring_size,
&addr, GFP_KERNEL);
priv->rx_skbuff[i] = NULL;
/* Initialize some variables in our dev structure */
+ priv->num_txbdfree = priv->tx_ring_size;
priv->dirty_tx = priv->cur_tx = priv->tx_bd_base;
priv->cur_rx = priv->rx_bd_base;
priv->skb_curtx = priv->skb_dirtytx = 0;
/* Initialize Transmit Descriptor Ring */
txbdp = priv->tx_bd_base;
for (i = 0; i < priv->tx_ring_size; i++) {
- txbdp->status = 0;
- txbdp->length = 0;
+ txbdp->lstatus = 0;
txbdp->bufPtr = 0;
txbdp++;
}
/* Install our interrupt handlers for Error,
* Transmit, and Receive */
if (request_irq(priv->interruptError, gfar_error,
- 0, "enet_error", dev) < 0) {
+ 0, priv->int_name_er, dev) < 0) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->interruptError);
}
if (request_irq(priv->interruptTransmit, gfar_transmit,
- 0, "enet_tx", dev) < 0) {
+ 0, priv->int_name_tx, dev) < 0) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
dev->name, priv->interruptTransmit);
}
if (request_irq(priv->interruptReceive, gfar_receive,
- 0, "enet_rx", dev) < 0) {
+ 0, priv->int_name_rx, dev) < 0) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d (receive0)\n",
dev->name, priv->interruptReceive);
}
} else {
if (request_irq(priv->interruptTransmit, gfar_interrupt,
- 0, "gfar_interrupt", dev) < 0) {
+ 0, priv->int_name_tx, dev) < 0) {
if (netif_msg_intr(priv))
printk(KERN_ERR "%s: Can't get IRQ %d\n",
- dev->name, priv->interruptError);
+ dev->name, priv->interruptTransmit);
err = -1;
goto err_irq_fail;
rctrl |= RCTRL_PADDING(priv->padding);
}
+ /* keep vlan related bits if it's enabled */
+ if (priv->vlgrp) {
+ rctrl |= RCTRL_VLEX | RCTRL_PRSDEP_INIT;
+ tctrl |= TCTRL_VLINS;
+ }
+
/* Init rctrl based on our settings */
gfar_write(&priv->regs->rctrl, rctrl);
if (dev->features & NETIF_F_IP_CSUM)
- gfar_write(&priv->regs->tctrl, TCTRL_INIT_CSUM);
+ tctrl |= TCTRL_INIT_CSUM;
+
+ gfar_write(&priv->regs->tctrl, tctrl);
/* Set the extraction length and index */
attrs = ATTRELI_EL(priv->rx_stash_size) |
rx_skb_fail:
free_skb_resources(priv);
tx_skb_fail:
- dma_free_coherent(&dev->dev,
+ dma_free_coherent(&priv->ofdev->dev,
sizeof(struct txbd8)*priv->tx_ring_size
+ sizeof(struct rxbd8)*priv->rx_ring_size,
priv->tx_bd_base,
napi_enable(&priv->napi);
+ skb_queue_head_init(&priv->rx_recycle);
+
/* Initialize a bunch of registers */
init_registers(dev);
netif_start_queue(dev);
+ device_set_wakeup_enable(&dev->dev, priv->wol_en);
+
return err;
}
-static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb, struct txbd8 *bdp)
+static inline struct txfcb *gfar_add_fcb(struct sk_buff *skb)
{
- struct txfcb *fcb = (struct txfcb *)skb_push (skb, GMAC_FCB_LEN);
+ struct txfcb *fcb = (struct txfcb *)skb_push(skb, GMAC_FCB_LEN);
memset(fcb, 0, GMAC_FCB_LEN);
fcb->vlctl = vlan_tx_tag_get(skb);
}
+static inline struct txbd8 *skip_txbd(struct txbd8 *bdp, int stride,
+ struct txbd8 *base, int ring_size)
+{
+ struct txbd8 *new_bd = bdp + stride;
+
+ return (new_bd >= (base + ring_size)) ? (new_bd - ring_size) : new_bd;
+}
+
+static inline struct txbd8 *next_txbd(struct txbd8 *bdp, struct txbd8 *base,
+ int ring_size)
+{
+ return skip_txbd(bdp, 1, base, ring_size);
+}
+
/* This is called by the kernel when a frame is ready for transmission. */
/* It is pointed to by the dev->hard_start_xmit function pointer */
static int gfar_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct gfar_private *priv = netdev_priv(dev);
struct txfcb *fcb = NULL;
- struct txbd8 *txbdp;
- u16 status;
+ struct txbd8 *txbdp, *txbdp_start, *base;
+ u32 lstatus;
+ int i;
+ u32 bufaddr;
unsigned long flags;
+ unsigned int nr_frags, length;
+
+ base = priv->tx_bd_base;
+
+ /* make space for additional header when fcb is needed */
+ if (((skb->ip_summed == CHECKSUM_PARTIAL) ||
+ (priv->vlgrp && vlan_tx_tag_present(skb))) &&
+ (skb_headroom(skb) < GMAC_FCB_LEN)) {
+ struct sk_buff *skb_new;
+
+ skb_new = skb_realloc_headroom(skb, GMAC_FCB_LEN);
+ if (!skb_new) {
+ dev->stats.tx_errors++;
+ kfree_skb(skb);
+ return NETDEV_TX_OK;
+ }
+ kfree_skb(skb);
+ skb = skb_new;
+ }
+
+ /* total number of fragments in the SKB */
+ nr_frags = skb_shinfo(skb)->nr_frags;
+
+ spin_lock_irqsave(&priv->txlock, flags);
+
+ /* check if there is space to queue this packet */
+ if ((nr_frags+1) > priv->num_txbdfree) {
+ /* no space, stop the queue */
+ netif_stop_queue(dev);
+ dev->stats.tx_fifo_errors++;
+ spin_unlock_irqrestore(&priv->txlock, flags);
+ return NETDEV_TX_BUSY;
+ }
/* Update transmit stats */
dev->stats.tx_bytes += skb->len;
- /* Lock priv now */
- spin_lock_irqsave(&priv->txlock, flags);
+ txbdp = txbdp_start = priv->cur_tx;
+
+ if (nr_frags == 0) {
+ lstatus = txbdp->lstatus | BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
+ } else {
+ /* Place the fragment addresses and lengths into the TxBDs */
+ for (i = 0; i < nr_frags; i++) {
+ /* Point at the next BD, wrapping as needed */
+ txbdp = next_txbd(txbdp, base, priv->tx_ring_size);
+
+ length = skb_shinfo(skb)->frags[i].size;
+
+ lstatus = txbdp->lstatus | length |
+ BD_LFLAG(TXBD_READY);
+
+ /* Handle the last BD specially */
+ if (i == nr_frags - 1)
+ lstatus |= BD_LFLAG(TXBD_LAST | TXBD_INTERRUPT);
+
+ bufaddr = dma_map_page(&priv->ofdev->dev,
+ skb_shinfo(skb)->frags[i].page,
+ skb_shinfo(skb)->frags[i].page_offset,
+ length,
+ DMA_TO_DEVICE);
- /* Point at the first free tx descriptor */
- txbdp = priv->cur_tx;
+ /* set the TxBD length and buffer pointer */
+ txbdp->bufPtr = bufaddr;
+ txbdp->lstatus = lstatus;
+ }
- /* Clear all but the WRAP status flags */
- status = txbdp->status & TXBD_WRAP;
+ lstatus = txbdp_start->lstatus;
+ }
/* Set up checksumming */
if (CHECKSUM_PARTIAL == skb->ip_summed) {
- fcb = gfar_add_fcb(skb, txbdp);
- status |= TXBD_TOE;
+ fcb = gfar_add_fcb(skb);
+ lstatus |= BD_LFLAG(TXBD_TOE);
gfar_tx_checksum(skb, fcb);
}
if (priv->vlgrp && vlan_tx_tag_present(skb)) {
if (unlikely(NULL == fcb)) {
- fcb = gfar_add_fcb(skb, txbdp);
- status |= TXBD_TOE;
+ fcb = gfar_add_fcb(skb);
+ lstatus |= BD_LFLAG(TXBD_TOE);
}
gfar_tx_vlan(skb, fcb);
}
- /* Set buffer length and pointer */
- txbdp->length = skb->len;
- txbdp->bufPtr = dma_map_single(&dev->dev, skb->data,
- skb->len, DMA_TO_DEVICE);
-
- /* Save the skb pointer so we can free it later */
+ /* setup the TxBD length and buffer pointer for the first BD */
priv->tx_skbuff[priv->skb_curtx] = skb;
+ txbdp_start->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
+ skb_headlen(skb), DMA_TO_DEVICE);
- /* Update the current skb pointer (wrapping if this was the last) */
- priv->skb_curtx =
- (priv->skb_curtx + 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
-
- /* Flag the BD as interrupt-causing */
- status |= TXBD_INTERRUPT;
-
- /* Flag the BD as ready to go, last in frame, and */
- /* in need of CRC */
- status |= (TXBD_READY | TXBD_LAST | TXBD_CRC);
-
- dev->trans_start = jiffies;
+ lstatus |= BD_LFLAG(TXBD_CRC | TXBD_READY) | skb_headlen(skb);
- /* The powerpc-specific eieio() is used, as wmb() has too strong
+ /*
+ * The powerpc-specific eieio() is used, as wmb() has too strong
* semantics (it requires synchronization between cacheable and
* uncacheable mappings, which eieio doesn't provide and which we
* don't need), thus requiring a more expensive sync instruction. At
* some point, the set of architecture-independent barrier functions
* should be expanded to include weaker barriers.
*/
-
eieio();
- txbdp->status = status;
- /* If this was the last BD in the ring, the next one */
- /* is at the beginning of the ring */
- if (txbdp->status & TXBD_WRAP)
- txbdp = priv->tx_bd_base;
- else
- txbdp++;
+ txbdp_start->lstatus = lstatus;
+
+ /* Update the current skb pointer to the next entry we will use
+ * (wrapping if necessary) */
+ priv->skb_curtx = (priv->skb_curtx + 1) &
+ TX_RING_MOD_MASK(priv->tx_ring_size);
+
+ priv->cur_tx = next_txbd(txbdp, base, priv->tx_ring_size);
+
+ /* reduce TxBD free count */
+ priv->num_txbdfree -= (nr_frags + 1);
+
+ dev->trans_start = jiffies;
/* If the next BD still needs to be cleaned up, then the bds
are full. We need to tell the kernel to stop sending us stuff. */
- if (txbdp == priv->dirty_tx) {
+ if (!priv->num_txbdfree) {
netif_stop_queue(dev);
dev->stats.tx_fifo_errors++;
}
- /* Update the current txbd to the next one */
- priv->cur_tx = txbdp;
-
/* Tell the DMA to go go go */
gfar_write(&priv->regs->tstat, TSTAT_CLEAR_THALT);
/* Unlock priv */
spin_unlock_irqrestore(&priv->txlock, flags);
- return 0;
+ return NETDEV_TX_OK;
}
/* Stops the kernel queue, and halts the controller */
napi_disable(&priv->napi);
+ skb_queue_purge(&priv->rx_recycle);
cancel_work_sync(&priv->reset_task);
stop_gfar(dev);
{
struct gfar_private *priv = netdev_priv(dev);
unsigned long flags;
- struct vlan_group *old_grp;
u32 tempval;
spin_lock_irqsave(&priv->rxlock, flags);
- old_grp = priv->vlgrp;
-
- if (old_grp == grp)
- return;
+ priv->vlgrp = grp;
if (grp) {
/* Enable VLAN tag insertion */
/* Enable VLAN tag extraction */
tempval = gfar_read(&priv->regs->rctrl);
- tempval |= RCTRL_VLEX;
tempval |= (RCTRL_VLEX | RCTRL_PRSDEP_INIT);
gfar_write(&priv->regs->rctrl, tempval);
} else {
{
struct gfar_private *priv = container_of(work, struct gfar_private,
reset_task);
- struct net_device *dev = priv->dev;
+ struct net_device *dev = priv->ndev;
if (dev->flags & IFF_UP) {
+ netif_stop_queue(dev);
stop_gfar(dev);
startup_gfar(dev);
+ netif_start_queue(dev);
}
netif_tx_schedule_all(dev);
/* Interrupt Handler for Transmit complete */
static int gfar_clean_tx_ring(struct net_device *dev)
{
- struct txbd8 *bdp;
struct gfar_private *priv = netdev_priv(dev);
+ struct txbd8 *bdp;
+ struct txbd8 *lbdp = NULL;
+ struct txbd8 *base = priv->tx_bd_base;
+ struct sk_buff *skb;
+ int skb_dirtytx;
+ int tx_ring_size = priv->tx_ring_size;
+ int frags = 0;
+ int i;
int howmany = 0;
+ u32 lstatus;
bdp = priv->dirty_tx;
- while ((bdp->status & TXBD_READY) == 0) {
- /* If dirty_tx and cur_tx are the same, then either the */
- /* ring is empty or full now (it could only be full in the beginning, */
- /* obviously). If it is empty, we are done. */
- if ((bdp == priv->cur_tx) && (netif_queue_stopped(dev) == 0))
- break;
+ skb_dirtytx = priv->skb_dirtytx;
- howmany++;
+ while ((skb = priv->tx_skbuff[skb_dirtytx])) {
+ frags = skb_shinfo(skb)->nr_frags;
+ lbdp = skip_txbd(bdp, frags, base, tx_ring_size);
- /* Deferred means some collisions occurred during transmit, */
- /* but we eventually sent the packet. */
- if (bdp->status & TXBD_DEF)
- dev->stats.collisions++;
+ lstatus = lbdp->lstatus;
- /* Unmap the DMA memory */
- dma_unmap_single(&priv->dev->dev, bdp->bufPtr,
- bdp->length, DMA_TO_DEVICE);
+ /* Only clean completed frames */
+ if ((lstatus & BD_LFLAG(TXBD_READY)) &&
+ (lstatus & BD_LENGTH_MASK))
+ break;
- /* Free the sk buffer associated with this TxBD */
- dev_kfree_skb_irq(priv->tx_skbuff[priv->skb_dirtytx]);
+ dma_unmap_single(&priv->ofdev->dev,
+ bdp->bufPtr,
+ bdp->length,
+ DMA_TO_DEVICE);
- priv->tx_skbuff[priv->skb_dirtytx] = NULL;
- priv->skb_dirtytx =
- (priv->skb_dirtytx +
- 1) & TX_RING_MOD_MASK(priv->tx_ring_size);
+ bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
+ bdp = next_txbd(bdp, base, tx_ring_size);
- /* Clean BD length for empty detection */
- bdp->length = 0;
+ for (i = 0; i < frags; i++) {
+ dma_unmap_page(&priv->ofdev->dev,
+ bdp->bufPtr,
+ bdp->length,
+ DMA_TO_DEVICE);
+ bdp->lstatus &= BD_LFLAG(TXBD_WRAP);
+ bdp = next_txbd(bdp, base, tx_ring_size);
+ }
- /* update bdp to point at next bd in the ring (wrapping if necessary) */
- if (bdp->status & TXBD_WRAP)
- bdp = priv->tx_bd_base;
+ /*
+ * If there's room in the queue (limit it to rx_buffer_size)
+ * we add this skb back into the pool, if it's the right size
+ */
+ if (skb_queue_len(&priv->rx_recycle) < priv->rx_ring_size &&
+ skb_recycle_check(skb, priv->rx_buffer_size +
+ RXBUF_ALIGNMENT))
+ __skb_queue_head(&priv->rx_recycle, skb);
else
- bdp++;
+ dev_kfree_skb_any(skb);
- /* Move dirty_tx to be the next bd */
- priv->dirty_tx = bdp;
+ priv->tx_skbuff[skb_dirtytx] = NULL;
- /* We freed a buffer, so now we can restart transmission */
- if (netif_queue_stopped(dev))
- netif_wake_queue(dev);
- } /* while ((bdp->status & TXBD_READY) == 0) */
+ skb_dirtytx = (skb_dirtytx + 1) &
+ TX_RING_MOD_MASK(tx_ring_size);
+
+ howmany++;
+ priv->num_txbdfree += frags + 1;
+ }
+
+ /* If we freed a buffer, we can restart transmission, if necessary */
+ if (netif_queue_stopped(dev) && priv->num_txbdfree)
+ netif_wake_queue(dev);
+
+ /* Update dirty indicators */
+ priv->skb_dirtytx = skb_dirtytx;
+ priv->dirty_tx = bdp;
dev->stats.tx_packets += howmany;
return howmany;
}
-/* Interrupt Handler for Transmit complete */
-static irqreturn_t gfar_transmit(int irq, void *dev_id)
+static void gfar_schedule_cleanup(struct net_device *dev)
{
- struct net_device *dev = (struct net_device *) dev_id;
struct gfar_private *priv = netdev_priv(dev);
+ unsigned long flags;
- /* Clear IEVENT */
- gfar_write(&priv->regs->ievent, IEVENT_TX_MASK);
-
- /* Lock priv */
- spin_lock(&priv->txlock);
-
- gfar_clean_tx_ring(dev);
+ spin_lock_irqsave(&priv->txlock, flags);
+ spin_lock(&priv->rxlock);
- /* If we are coalescing the interrupts, reset the timer */
- /* Otherwise, clear it */
- if (likely(priv->txcoalescing)) {
- gfar_write(&priv->regs->txic, 0);
- gfar_write(&priv->regs->txic, priv->txic);
+ if (napi_schedule_prep(&priv->napi)) {
+ gfar_write(&priv->regs->imask, IMASK_RTX_DISABLED);
+ __napi_schedule(&priv->napi);
+ } else {
+ /*
+ * Clear IEVENT, so interrupts aren't called again
+ * because of the packets that have already arrived.
+ */
+ gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
}
- spin_unlock(&priv->txlock);
+ spin_unlock(&priv->rxlock);
+ spin_unlock_irqrestore(&priv->txlock, flags);
+}
+/* Interrupt Handler for Transmit complete */
+static irqreturn_t gfar_transmit(int irq, void *dev_id)
+{
+ gfar_schedule_cleanup((struct net_device *)dev_id);
return IRQ_HANDLED;
}
struct sk_buff *skb)
{
struct gfar_private *priv = netdev_priv(dev);
- u32 * status_len = (u32 *)bdp;
- u16 flags;
+ u32 lstatus;
- bdp->bufPtr = dma_map_single(&dev->dev, skb->data,
+ bdp->bufPtr = dma_map_single(&priv->ofdev->dev, skb->data,
priv->rx_buffer_size, DMA_FROM_DEVICE);
- flags = RXBD_EMPTY | RXBD_INTERRUPT;
+ lstatus = BD_LFLAG(RXBD_EMPTY | RXBD_INTERRUPT);
if (bdp == priv->rx_bd_base + priv->rx_ring_size - 1)
- flags |= RXBD_WRAP;
+ lstatus |= BD_LFLAG(RXBD_WRAP);
eieio();
- *status_len = (u32)flags << 16;
+ bdp->lstatus = lstatus;
}
struct gfar_private *priv = netdev_priv(dev);
struct sk_buff *skb = NULL;
- /* We have to allocate the skb, so keep trying till we succeed */
- skb = netdev_alloc_skb(dev, priv->rx_buffer_size + RXBUF_ALIGNMENT);
+ skb = __skb_dequeue(&priv->rx_recycle);
+ if (!skb)
+ skb = netdev_alloc_skb(dev,
+ priv->rx_buffer_size + RXBUF_ALIGNMENT);
if (!skb)
return NULL;
irqreturn_t gfar_receive(int irq, void *dev_id)
{
- struct net_device *dev = (struct net_device *) dev_id;
- struct gfar_private *priv = netdev_priv(dev);
- u32 tempval;
-
- /* support NAPI */
- /* Clear IEVENT, so interrupts aren't called again
- * because of the packets that have already arrived */
- gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
-
- if (netif_rx_schedule_prep(dev, &priv->napi)) {
- tempval = gfar_read(&priv->regs->imask);
- tempval &= IMASK_RTX_DISABLED;
- gfar_write(&priv->regs->imask, tempval);
-
- __netif_rx_schedule(dev, &priv->napi);
- } else {
- if (netif_msg_rx_err(priv))
- printk(KERN_DEBUG "%s: receive called twice (%x)[%x]\n",
- dev->name, gfar_read(&priv->regs->ievent),
- gfar_read(&priv->regs->imask));
- }
-
+ gfar_schedule_cleanup((struct net_device *)dev_id);
return IRQ_HANDLED;
}
*/
int gfar_clean_rx_ring(struct net_device *dev, int rx_work_limit)
{
- struct rxbd8 *bdp;
+ struct rxbd8 *bdp, *base;
struct sk_buff *skb;
int pkt_len;
int amount_pull;
/* Get the first full descriptor */
bdp = priv->cur_rx;
+ base = priv->rx_bd_base;
amount_pull = (gfar_uses_fcb(priv) ? GMAC_FCB_LEN : 0) +
priv->padding;
skb = priv->rx_skbuff[priv->skb_currx];
- dma_unmap_single(&priv->dev->dev, bdp->bufPtr,
+ dma_unmap_single(&priv->ofdev->dev, bdp->bufPtr,
priv->rx_buffer_size, DMA_FROM_DEVICE);
/* We drop the frame if we failed to allocate a new buffer */
if (unlikely(!newskb))
newskb = skb;
-
- if (skb)
- dev_kfree_skb_any(skb);
+ else if (skb) {
+ /*
+ * We need to reset ->data to what it
+ * was before gfar_new_skb() re-aligned
+ * it to an RXBUF_ALIGNMENT boundary
+ * before we put the skb back on the
+ * recycle list.
+ */
+ skb->data = skb->head + NET_SKB_PAD;
+ __skb_queue_head(&priv->rx_recycle, skb);
+ }
} else {
/* Increment the number of packets */
dev->stats.rx_packets++;
skb_put(skb, pkt_len);
dev->stats.rx_bytes += pkt_len;
+ if (in_irq() || irqs_disabled())
+ printk("Interrupt problem!\n");
gfar_process_frame(dev, skb, amount_pull);
} else {
gfar_new_rxbdp(dev, bdp, newskb);
/* Update to the next pointer */
- if (bdp->status & RXBD_WRAP)
- bdp = priv->rx_bd_base;
- else
- bdp++;
+ bdp = next_bd(bdp, base, priv->rx_ring_size);
/* update to point at the next skb */
priv->skb_currx =
static int gfar_poll(struct napi_struct *napi, int budget)
{
struct gfar_private *priv = container_of(napi, struct gfar_private, napi);
- struct net_device *dev = priv->dev;
- int howmany;
+ struct net_device *dev = priv->ndev;
+ int tx_cleaned = 0;
+ int rx_cleaned = 0;
unsigned long flags;
+ /* Clear IEVENT, so interrupts aren't called again
+ * because of the packets that have already arrived */
+ gfar_write(&priv->regs->ievent, IEVENT_RTX_MASK);
+
/* If we fail to get the lock, don't bother with the TX BDs */
if (spin_trylock_irqsave(&priv->txlock, flags)) {
- gfar_clean_tx_ring(dev);
+ tx_cleaned = gfar_clean_tx_ring(dev);
spin_unlock_irqrestore(&priv->txlock, flags);
}
- howmany = gfar_clean_rx_ring(dev, budget);
+ rx_cleaned = gfar_clean_rx_ring(dev, budget);
+
+ if (tx_cleaned)
+ return budget;
- if (howmany < budget) {
- netif_rx_complete(dev, napi);
+ if (rx_cleaned < budget) {
+ napi_complete(napi);
/* Clear the halt bit in RSTAT */
gfar_write(&priv->regs->rstat, RSTAT_CLEAR_RHALT);
gfar_write(&priv->regs->rxic, 0);
gfar_write(&priv->regs->rxic, priv->rxic);
}
+ if (likely(priv->txcoalescing)) {
+ gfar_write(&priv->regs->txic, 0);
+ gfar_write(&priv->regs->txic, priv->txic);
+ }
}
- return howmany;
+ return rx_cleaned;
}
#ifdef CONFIG_NET_POLL_CONTROLLER
case 1000:
tempval =
((tempval & ~(MACCFG2_IF)) | MACCFG2_GMII);
+
+ ecntrl &= ~(ECNTRL_R100);
break;
case 100:
case 10:
return IRQ_HANDLED;
}
-/* work with hotplug and coldplug */
-MODULE_ALIAS("platform:fsl-gianfar");
-
static struct of_device_id gfar_match[] =
{
{
},
{},
};
+MODULE_DEVICE_TABLE(of, gfar_match);
/* Structure for a device driver */
static struct of_platform_driver gfar_driver = {
static int __init gfar_init(void)
{
- int err = gfar_mdio_init();
-
- if (err)
- return err;
-
- err = of_register_platform_driver(&gfar_driver);
-
- if (err)
- gfar_mdio_exit();
-
- return err;
+ return of_register_platform_driver(&gfar_driver);
}
static void __exit gfar_exit(void)
{
of_unregister_platform_driver(&gfar_driver);
- gfar_mdio_exit();
}
module_init(gfar_init);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff