int mlx4_en_free_tx_buf(struct ether *dev, struct mlx4_en_tx_ring *ring)
{
panic("Disabled");
#if 0 // AKAROS_PORT
struct mlx4_en_priv *priv = netdev_priv(dev);
int cnt = 0;
/* Skip last polled descriptor */
ring->cons += ring->last_nr_txbb;
en_dbg(DRV, priv, "Freeing Tx buf - cons:0x%x prod:0x%x\n",
ring->cons, ring->prod);
if ((uint32_t) (ring->prod - ring->cons) > ring->size) {
if (netif_msg_tx_err(priv))
en_warn(priv, "Tx consumer passed producer!\n");
return 0;
}
while (ring->cons != ring->prod) {
ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring,
ring->cons & ring->size_mask,
!!(ring->cons & ring->size), 0);
ring->cons += ring->last_nr_txbb;
cnt++;
}
netdev_tx_reset_queue(ring->tx_queue);
if (cnt)
en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt);
return cnt;
#endif
}
static void cpmac_end_xmit(struct net_device *dev, int queue)
{
struct cpmac_desc *desc;
struct cpmac_priv *priv = netdev_priv(dev);
desc = &priv->desc_ring[queue];
cpmac_write(priv->regs, CPMAC_TX_ACK(queue), (u32)desc->mapping);
if (likely(desc->skb)) {
spin_lock(&priv->lock);
dev->stats.tx_packets++;
dev->stats.tx_bytes += desc->skb->len;
spin_unlock(&priv->lock);
dma_unmap_single(&dev->dev, desc->data_mapping, desc->skb->len,
DMA_TO_DEVICE);
if (unlikely(netif_msg_tx_done(priv)))
printk(KERN_DEBUG "%s: sent 0x%p, len=%d\n", dev->name,
desc->skb, desc->skb->len);
dev_kfree_skb_irq(desc->skb);
desc->skb = NULL;
if (netif_subqueue_stopped(dev, queue))
netif_wake_subqueue(dev, queue);
} else {
if (netif_msg_tx_err(priv) && net_ratelimit())
printk(KERN_WARNING
"%s: end_xmit: spurious interrupt\n", dev->name);
if (netif_subqueue_stopped(dev, queue))
netif_wake_subqueue(dev, queue);
}
}
int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int cnt = 0;
/* Skip last polled descriptor */
ring->cons += ring->last_nr_txbb;
en_dbg(DRV, priv, "Freeing Tx buf - cons:0x%x prod:0x%x\n",
ring->cons, ring->prod);
if ((u32) (ring->prod - ring->cons) > ring->size) {
if (netif_msg_tx_err(priv))
en_warn(priv, "Tx consumer passed producer!\n");
return 0;
}
while (ring->cons != ring->prod) {
ring->last_nr_txbb = mlx4_en_free_tx_desc(priv, ring,
ring->cons & ring->size_mask,
!!(ring->cons & ring->size));
ring->cons += ring->last_nr_txbb;
cnt++;
}
if (cnt)
en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt);
return cnt;
}
static int get_real_size(struct sk_buff *skb, struct net_device *dev,
int *lso_header_size)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int real_size;
if (skb_is_gso(skb)) {
*lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb);
real_size = CTRL_SIZE + skb_shinfo(skb)->nr_frags * DS_SIZE +
ALIGN(*lso_header_size + 4, DS_SIZE);
if (unlikely(*lso_header_size != skb_headlen(skb))) {
/* We add a segment for the skb linear buffer only if
* it contains data */
if (*lso_header_size < skb_headlen(skb))
real_size += DS_SIZE;
else {
if (netif_msg_tx_err(priv))
en_warn(priv, "Non-linear headers\n");
return 0;
}
}
} else {
*lso_header_size = 0;
if (!is_inline(skb, NULL))
real_size = CTRL_SIZE + (skb_shinfo(skb)->nr_frags + 1) * DS_SIZE;
else
real_size = inline_size(skb);
}
return real_size;
}
void mpodp_tx_update_cache(struct mpodp_if_priv *priv)
{
int i;
for (i = 0; i < priv->n_txqs; ++i) {
struct mpodp_txq *txq = &priv->txqs[i];
/* check for new descriptors */
if (atomic_read(&txq->head) != 0 &&
txq->cached_head != txq->size) {
uint32_t tx_head;
struct mpodp_cache_entry *entry;
tx_head = readl(txq->head_addr);
/* Nothing yet */
if (tx_head < 0)
continue;
if (tx_head >= txq->mppa_size) {
if (netif_msg_tx_err(priv))
netdev_err(priv->netdev,
"Invalid head %d set in Txq[%d]\n", tx_head, txq->id);
return;
}
/* In autoloop, we need to cache new elements */
while (txq->cached_head < tx_head) {
entry = &txq->cache[txq->cached_head];
entry->addr =
readq(entry->entry_addr +
offsetof(struct mpodp_h2c_entry,
pkt_addr));
txq->cached_head++;
}
}
}
static void ag71xx_tx_timeout(struct net_device *dev)
{
struct ag71xx *ag = netdev_priv(dev);
if (netif_msg_tx_err(ag))
printk(KERN_DEBUG "%s: tx timeout\n", ag->dev->name);
schedule_work(&ag->restart_work);
}
static void cp_tx (struct cp_private *cp)
{
unsigned tx_head = cp->tx_head;
unsigned tx_tail = cp->tx_tail;
while (tx_tail != tx_head) {
struct sk_buff *skb;
u32 status;
rmb();
status = le32_to_cpu(cp->tx_ring[tx_tail].opts1);
if (status & DescOwn)
break;
skb = cp->tx_skb[tx_tail].skb;
if (!skb)
BUG();
pci_unmap_single(cp->pdev, cp->tx_skb[tx_tail].mapping,
skb->len, PCI_DMA_TODEVICE);
if (status & LastFrag) {
if (status & (TxError | TxFIFOUnder)) {
if (netif_msg_tx_err(cp))
printk(KERN_DEBUG "%s: tx err, status 0x%x\n",
cp->dev->name, status);
cp->net_stats.tx_errors++;
if (status & TxOWC)
cp->net_stats.tx_window_errors++;
if (status & TxMaxCol)
cp->net_stats.tx_aborted_errors++;
if (status & TxLinkFail)
cp->net_stats.tx_carrier_errors++;
if (status & TxFIFOUnder)
cp->net_stats.tx_fifo_errors++;
} else {
cp->net_stats.collisions +=
((status >> TxColCntShift) & TxColCntMask);
cp->net_stats.tx_packets++;
cp->net_stats.tx_bytes += skb->len;
if (netif_msg_tx_done(cp))
printk(KERN_DEBUG "%s: tx done, slot %d\n", cp->dev->name, tx_tail);
}
dev_kfree_skb_irq(skb);
}
cp->tx_skb[tx_tail].skb = NULL;
tx_tail = NEXT_TX(tx_tail);
}
cp->tx_tail = tx_tail;
if (TX_BUFFS_AVAIL(cp) > (MAX_SKB_FRAGS + 1))
netif_wake_queue(cp->dev);
}
static void tx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
if (urb->status == 0) {
dev->net->stats.tx_packets++;
dev->net->stats.tx_bytes += entry->length;
} else {
dev->net->stats.tx_errors++;
switch (urb->status) {
case -EPIPE:
usbnet_defer_kevent (dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: // async unlink
case -ESHUTDOWN: // hardware gone
break;
// like rx, tx gets controller i/o faults during khubd delays
// and so it uses the same throttling mechanism.
case -EPROTO:
case -ETIME:
case -EILSEQ:
#if defined(CONFIG_ERICSSON_F3307_ENABLE)
usb_mark_last_busy(dev->udev);
#endif
if (!timer_pending (&dev->delay)) {
mod_timer (&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link (dev))
devdbg (dev, "tx throttle %d",
urb->status);
}
netif_stop_queue (dev->net);
break;
default:
if (netif_msg_tx_err (dev))
devdbg (dev, "tx err %d", entry->urb->status);
break;
}
}
#if defined(CONFIG_ERICSSON_F3307_ENABLE)
usb_autopm_put_interface_async(dev->intf);
#endif
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
}
static int cpmac_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
int queue, len;
struct cpmac_desc *desc;
struct cpmac_priv *priv = netdev_priv(dev);
if (unlikely(atomic_read(&priv->reset_pending)))
return NETDEV_TX_BUSY;
if (unlikely(skb_padto(skb, ETH_ZLEN)))
return NETDEV_TX_OK;
len = max(skb->len, ETH_ZLEN);
queue = skb_get_queue_mapping(skb);
#ifdef CONFIG_NETDEVICES_MULTIQUEUE
netif_stop_subqueue(dev, queue);
#else
netif_stop_queue(dev);
#endif
desc = &priv->desc_ring[queue];
if (unlikely(desc->dataflags & CPMAC_OWN)) {
if (netif_msg_tx_err(priv) && net_ratelimit())
printk(KERN_WARNING "%s: tx dma ring full\n",
dev->name);
return NETDEV_TX_BUSY;
}
spin_lock(&priv->lock);
dev->trans_start = jiffies;
spin_unlock(&priv->lock);
desc->dataflags = CPMAC_SOP | CPMAC_EOP | CPMAC_OWN;
desc->skb = skb;
desc->data_mapping = dma_map_single(&dev->dev, skb->data, len,
DMA_TO_DEVICE);
desc->hw_data = (u32)desc->data_mapping;
desc->datalen = len;
desc->buflen = len;
if (unlikely(netif_msg_tx_queued(priv)))
printk(KERN_DEBUG "%s: sending 0x%p, len=%d\n", dev->name, skb,
skb->len);
if (unlikely(netif_msg_hw(priv)))
cpmac_dump_desc(dev, desc);
if (unlikely(netif_msg_pktdata(priv)))
cpmac_dump_skb(dev, skb);
cpmac_write(priv->regs, CPMAC_TX_PTR(queue), (u32)desc->mapping);
return NETDEV_TX_OK;
}
static int get_real_size(const struct sk_buff *skb,
const struct skb_shared_info *shinfo,
struct net_device *dev,
int *lso_header_size,
bool *inline_ok,
void **pfrag)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int real_size;
if (shinfo->gso_size) {
*inline_ok = false;
if (skb->encapsulation)
*lso_header_size = (skb_inner_transport_header(skb) - skb->data) + inner_tcp_hdrlen(skb);
else
*lso_header_size = skb_transport_offset(skb) + tcp_hdrlen(skb);
real_size = CTRL_SIZE + shinfo->nr_frags * DS_SIZE +
ALIGN(*lso_header_size + 4, DS_SIZE);
if (unlikely(*lso_header_size != skb_headlen(skb))) {
/* We add a segment for the skb linear buffer only if
* it contains data */
if (*lso_header_size < skb_headlen(skb))
real_size += DS_SIZE;
else {
if (netif_msg_tx_err(priv))
en_warn(priv, "Non-linear headers\n");
return 0;
}
}
} else {
*lso_header_size = 0;
*inline_ok = is_inline(priv->prof->inline_thold, skb,
shinfo, pfrag);
if (*inline_ok)
real_size = inline_size(skb);
else
real_size = CTRL_SIZE +
(shinfo->nr_frags + 1) * DS_SIZE;
}
return real_size;
}
/* work that cannot be done in interrupt context uses keventd.
*
* NOTE: with 2.5 we could do more of this using completion callbacks,
* especially now that control transfers can be queued.
*/
static void
kevent (struct work_struct *work)
{
struct usbnet *dev =
container_of(work, struct usbnet, kevent);
int status;
/* usb_clear_halt() needs a thread context */
if (test_bit (EVENT_TX_HALT, &dev->flags)) {
unlink_urbs (dev, &dev->txq);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto fail_pipe;
status = usb_clear_halt (dev->udev, dev->out);
usb_autopm_put_interface(dev->intf);
if (status < 0 &&
status != -EPIPE &&
status != -ESHUTDOWN) {
if (netif_msg_tx_err (dev))
fail_pipe:
netdev_err(dev->net, "can't clear tx halt, status %d\n",
status);
} else {
clear_bit (EVENT_TX_HALT, &dev->flags);
if (status != -ESHUTDOWN)
netif_wake_queue (dev->net);
}
}
if (test_bit (EVENT_RX_HALT, &dev->flags)) {
//HTC+++
//lock cpu perf
usbnet_lock_perf();
//queue usbnet_unlock_perf_delayed_work
usbnet_rx_len = 0;
schedule_delayed_work(&usbnet_unlock_perf_delayed_work, msecs_to_jiffies(PM_QOS_USBNET_PERF_UNLOCK_TIMER));
pr_info("%s(%d) [USBNET] EVENT_RX_HALT unlink_urbs !!!\n", __func__, __LINE__);
pr_info("%s(%d) [USBNET] dev->rxq.qlen:%d\n", __func__, __LINE__, dev->rxq.qlen);
//HTC---
unlink_urbs (dev, &dev->rxq);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto fail_halt;
status = usb_clear_halt (dev->udev, dev->in);
//HTC+++
pr_info("%s(%d) [USBNET] EVENT_RX_HALT usb_clear_halt:%d !!!\n", __func__, __LINE__, status);
//HTC---
usb_autopm_put_interface(dev->intf);
if (status < 0 &&
status != -EPIPE &&
status != -ESHUTDOWN) {
if (netif_msg_rx_err (dev))
fail_halt:
netdev_err(dev->net, "can't clear rx halt, status %d\n",
status);
} else {
//HTC+++
pr_info("%s(%d) [USBNET] clear_bit EVENT_RX_HALT !!!\n", __func__, __LINE__);
//HTC---
clear_bit (EVENT_RX_HALT, &dev->flags);
tasklet_schedule (&dev->bh);
}
}
/* tasklet could resubmit itself forever if memory is tight */
if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
struct urb *urb = NULL;
int resched = 1;
if (netif_running (dev->net))
urb = usb_alloc_urb (0, GFP_KERNEL);
else
clear_bit (EVENT_RX_MEMORY, &dev->flags);
if (urb != NULL) {
clear_bit (EVENT_RX_MEMORY, &dev->flags);
status = usb_autopm_get_interface(dev->intf);
if (status < 0) {
usb_free_urb(urb);
goto fail_lowmem;
}
if (rx_submit (dev, urb, GFP_KERNEL) == -ENOLINK)
resched = 0;
usb_autopm_put_interface(dev->intf);
fail_lowmem:
if (resched)
tasklet_schedule (&dev->bh);
}
}
if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
struct driver_info *info = dev->driver_info;
int retval = 0;
clear_bit (EVENT_LINK_RESET, &dev->flags);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto skip_reset;
if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
usb_autopm_put_interface(dev->intf);
skip_reset:
netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n",
retval,
dev->udev->bus->bus_name,
dev->udev->devpath,
info->description);
} else {
usb_autopm_put_interface(dev->intf);
}
}
if (dev->flags)
netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags);
}
INT SetupNextSend(PMINI_ADAPTER Adapter, struct sk_buff *Packet, USHORT Vcid)
{
int status=0;
BOOLEAN bHeaderSupressionEnabled = FALSE;
B_UINT16 uiClassifierRuleID;
u16 QueueIndex = skb_get_queue_mapping(Packet);
LEADER Leader={0};
if(Packet->len > MAX_DEVICE_DESC_SIZE)
{
status = STATUS_FAILURE;
goto errExit;
}
uiClassifierRuleID = *((UINT32*) (Packet->cb)+SKB_CB_CLASSIFICATION_OFFSET);
bHeaderSupressionEnabled = Adapter->PackInfo[QueueIndex].bHeaderSuppressionEnabled
& Adapter->bPHSEnabled;
if(Adapter->device_removed)
{
status = STATUS_FAILURE;
goto errExit;
}
status = PHSTransmit(Adapter, &Packet, Vcid, uiClassifierRuleID, bHeaderSupressionEnabled,
(UINT *)&Packet->len, Adapter->PackInfo[QueueIndex].bEthCSSupport);
if(status != STATUS_SUCCESS)
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL, "PHS Transmit failed..\n");
goto errExit;
}
Leader.Vcid = Vcid;
if(TCP_ACK == *((UINT32*) (Packet->cb) + SKB_CB_TCPACK_OFFSET ))
Leader.Status = LEADER_STATUS_TCP_ACK;
else
Leader.Status = LEADER_STATUS;
if(Adapter->PackInfo[QueueIndex].bEthCSSupport)
{
Leader.PLength = Packet->len;
if(skb_headroom(Packet) < LEADER_SIZE)
{
if((status = skb_cow(Packet,LEADER_SIZE)))
{
BCM_DEBUG_PRINT(Adapter,DBG_TYPE_TX, NEXT_SEND, DBG_LVL_ALL,"bcm_transmit : Failed To Increase headRoom\n");
goto errExit;
}
}
skb_push(Packet, LEADER_SIZE);
memcpy(Packet->data, &Leader, LEADER_SIZE);
}
else
{
Leader.PLength = Packet->len - ETH_HLEN;
memcpy((LEADER*)skb_pull(Packet, (ETH_HLEN - LEADER_SIZE)), &Leader, LEADER_SIZE);
}
status = Adapter->interface_transmit(Adapter->pvInterfaceAdapter,
Packet->data, (Leader.PLength + LEADER_SIZE));
if(status)
{
++Adapter->dev->stats.tx_errors;
if (netif_msg_tx_err(Adapter))
pr_info(PFX "%s: transmit error %d\n", Adapter->dev->name,
status);
}
else
{
struct net_device_stats *netstats = &Adapter->dev->stats;
Adapter->PackInfo[QueueIndex].uiTotalTxBytes += Leader.PLength;
netstats->tx_bytes += Leader.PLength;
++netstats->tx_packets;
Adapter->PackInfo[QueueIndex].uiCurrentTokenCount -= Leader.PLength << 3;
Adapter->PackInfo[QueueIndex].uiSentBytes += (Packet->len);
Adapter->PackInfo[QueueIndex].uiSentPackets++;
Adapter->PackInfo[QueueIndex].NumOfPacketsSent++;
atomic_dec(&Adapter->PackInfo[QueueIndex].uiPerSFTxResourceCount);
Adapter->PackInfo[QueueIndex].uiThisPeriodSentBytes += Leader.PLength;
}
atomic_dec(&Adapter->CurrNumFreeTxDesc);
errExit:
dev_kfree_skb(Packet);
return status;
}
static void kevent(void *data)
{
struct usbnet *dev = (struct usbnet *)data;
#else
static void kevent(struct work_struct *work)
{
struct usbnet *dev =
container_of(work, struct usbnet, kevent);
#endif
int status;
/* usb_clear_halt() needs a thread context */
if (test_bit(EVENT_TX_HALT, &dev->flags)) {
unlink_urbs(dev, &dev->txq);
status = usb_clear_halt(dev->udev, dev->out);
if (status < 0
&& status != -EPIPE
&& status != -ESHUTDOWN) {
if (netif_msg_tx_err(dev))
deverr(dev, "can't clear tx halt, status %d",
status);
} else {
clear_bit(EVENT_TX_HALT, &dev->flags);
if (status != -ESHUTDOWN)
netif_wake_queue(dev->net);
}
}
if (test_bit(EVENT_RX_HALT, &dev->flags)) {
unlink_urbs(dev, &dev->rxq);
status = usb_clear_halt(dev->udev, dev->in);
if (status < 0
&& status != -EPIPE
&& status != -ESHUTDOWN) {
if (netif_msg_rx_err(dev))
deverr(dev, "can't clear rx halt, status %d",
status);
} else {
clear_bit(EVENT_RX_HALT, &dev->flags);
tasklet_schedule(&dev->bh);
}
}
/* tasklet could resubmit itself forever if memory is tight */
if (test_bit(EVENT_RX_MEMORY, &dev->flags)) {
struct urb *urb = NULL;
if (netif_running(dev->net))
urb = usb_alloc_urb(0, GFP_KERNEL);
else
clear_bit(EVENT_RX_MEMORY, &dev->flags);
if (urb != NULL) {
clear_bit(EVENT_RX_MEMORY, &dev->flags);
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
urb->transfer_flags |= URB_ASYNC_UNLINK;
#endif
rx_submit(dev, urb, GFP_KERNEL);
tasklet_schedule(&dev->bh);
}
}
if (test_bit(EVENT_LINK_RESET, &dev->flags)) {
struct driver_info *info = dev->driver_info;
int retval = 0;
clear_bit(EVENT_LINK_RESET, &dev->flags);
if (info->link_reset) {
retval = info->link_reset(dev);
if (retval < 0) {
devinfo(dev,
"link reset failed (%d) usbnet usb-%s-%s, %s",
retval,
dev->udev->bus->bus_name,
dev->udev->devpath,
info->description);
}
}
}
if (dev->flags)
devdbg(dev, "kevent done, flags = 0x%lx", dev->flags);
}
/*-------------------------------------------------------------------------*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 19)
static void tx_complete(struct urb *urb, struct pt_regs *regs)
#else
static void tx_complete(struct urb *urb)
#endif
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
if (urb->status == 0) {
dev->stats.tx_packets++;
dev->stats.tx_bytes += entry->length;
} else {
dev->stats.tx_errors++;
switch (urb->status) {
case -EPIPE:
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: /* async unlink */
case -ESHUTDOWN: /* hardware gone */
break;
/* like rx, tx gets controller i/o faults during khubd delays */
/* and so it uses the same throttling mechanism. */
case -EPROTO:
case -ETIME:
case -EILSEQ:
if (!timer_pending(&dev->delay)) {
mod_timer(&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link(dev))
devdbg(dev, "tx throttle %d",
urb->status);
}
netif_stop_queue(dev->net);
break;
default:
if (netif_msg_tx_err(dev))
devdbg(dev, "tx err %d", entry->urb->status);
break;
}
}
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
}
/*-------------------------------------------------------------------------*/
static
void axusbnet_tx_timeout(struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
unlink_urbs(dev, &dev->txq);
tasklet_schedule(&dev->bh);
/* FIXME: device recovery -- reset? */
}
/*-------------------------------------------------------------------------*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 32)
static int
#else
static netdev_tx_t
#endif
axusbnet_start_xmit(struct sk_buff *skb, struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
int length;
struct urb *urb = NULL;
struct skb_data *entry;
struct driver_info *info = dev->driver_info;
unsigned long flags;
int retval;
/* some devices want funky USB-level framing, for */
/* win32 driver (usually) and/or hardware quirks */
if (info->tx_fixup) {
skb = info->tx_fixup(dev, skb, GFP_ATOMIC);
if (!skb) {
if (netif_msg_tx_err(dev))
devdbg(dev, "can't tx_fixup skb");
goto drop;
}
}
length = skb->len;
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (!urb) {
if (netif_msg_tx_err(dev))
devdbg(dev, "no urb");
goto drop;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = tx_start;
entry->length = length;
usb_fill_bulk_urb(urb, dev->udev, dev->out, skb->data,
skb->len, tx_complete, skb);
/* don't assume the hardware handles USB_ZERO_PACKET
* NOTE: strictly conforming cdc-ether devices should expect
* the ZLP here, but ignore the one-byte packet.
*/
if (!(info->flags & FLAG_SEND_ZLP) && (length % dev->maxpacket) == 0) {
urb->transfer_buffer_length++;
if (skb_tailroom(skb)) {
skb->data[skb->len] = 0;
__skb_put(skb, 1);
}
}
spin_lock_irqsave(&dev->txq.lock, flags);
switch ((retval = usb_submit_urb(urb, GFP_ATOMIC))) {
case -EPIPE:
netif_stop_queue(net);
axusbnet_defer_kevent(dev, EVENT_TX_HALT);
break;
default:
if (netif_msg_tx_err(dev))
devdbg(dev, "tx: submit urb err %d", retval);
break;
case 0:
net->trans_start = jiffies;
__skb_queue_tail(&dev->txq, skb);
if (dev->txq.qlen >= TX_QLEN(dev))
netif_stop_queue(net);
}
spin_unlock_irqrestore(&dev->txq.lock, flags);
if (retval) {
if (netif_msg_tx_err(dev))
devdbg(dev, "drop, code %d", retval);
drop:
dev->stats.tx_dropped++;
if (skb)
dev_kfree_skb_any(skb);
usb_free_urb(urb);
} else if (netif_msg_tx_queued(dev)) {
devdbg(dev, "> tx, len %d, type 0x%x",
length, skb->protocol);
}
return NETDEV_TX_OK;
}
/*-------------------------------------------------------------------------*/
/* tasklet (work deferred from completions, in_irq) or timer */
static void axusbnet_bh(unsigned long param)
{
struct usbnet *dev = (struct usbnet *) param;
struct sk_buff *skb;
struct skb_data *entry;
while ((skb = skb_dequeue(&dev->done))) {
entry = (struct skb_data *) skb->cb;
switch (entry->state) {
case rx_done:
entry->state = rx_cleanup;
rx_process(dev, skb);
continue;
case tx_done:
case rx_cleanup:
usb_free_urb(entry->urb);
dev_kfree_skb(skb);
continue;
default:
devdbg(dev, "bogus skb state %d", entry->state);
}
}
/* waiting for all pending urbs to complete? */
if (dev->wait) {
if ((dev->txq.qlen + dev->rxq.qlen + dev->done.qlen) == 0)
wake_up(dev->wait);
/* or are we maybe short a few urbs? */
} else if (netif_running(dev->net)
&& netif_device_present(dev->net)
&& !timer_pending(&dev->delay)
&& !test_bit(EVENT_RX_HALT, &dev->flags)) {
int temp = dev->rxq.qlen;
int qlen = RX_QLEN(dev);
if (temp < qlen) {
struct urb *urb;
int i;
/* don't refill the queue all at once */
for (i = 0; i < 10 && dev->rxq.qlen < qlen; i++) {
urb = usb_alloc_urb(0, GFP_ATOMIC);
if (urb != NULL) {
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 14)
urb->transfer_flags |= URB_ASYNC_UNLINK;
#endif
rx_submit(dev, urb, GFP_ATOMIC);
}
}
if (temp != dev->rxq.qlen && netif_msg_link(dev))
devdbg(dev, "rxqlen %d --> %d",
temp, dev->rxq.qlen);
if (dev->rxq.qlen < qlen)
tasklet_schedule(&dev->bh);
}
if (dev->txq.qlen < TX_QLEN(dev))
netif_wake_queue(dev->net);
}
}
/*-------------------------------------------------------------------------
*
* USB Device Driver support
*
*-------------------------------------------------------------------------*/
/* precondition: never called in_interrupt */
static
void axusbnet_disconnect(struct usb_interface *intf)
{
struct usbnet *dev;
struct usb_device *xdev;
struct net_device *net;
dev = usb_get_intfdata(intf);
usb_set_intfdata(intf, NULL);
if (!dev)
return;
xdev = interface_to_usbdev(intf);
if (netif_msg_probe(dev))
devinfo(dev, "unregister '%s' usb-%s-%s, %s",
intf->dev.driver->name,
xdev->bus->bus_name, xdev->devpath,
dev->driver_info->description);
net = dev->net;
unregister_netdev(net);
/* we don't hold rtnl here ... */
flush_scheduled_work();
if (dev->driver_info->unbind)
dev->driver_info->unbind(dev, intf);
free_netdev(net);
usb_put_dev(xdev);
}
/*-------------------------------------------------------------------------*/
/* precondition: never called in_interrupt */
static int
axusbnet_probe(struct usb_interface *udev, const struct usb_device_id *prod)
{
struct usbnet *dev;
struct net_device *net;
struct usb_host_interface *interface;
struct driver_info *info;
struct usb_device *xdev;
int status;
const char *name;
name = udev->dev.driver->name;
info = (struct driver_info *) prod->driver_info;
if (!info) {
printk(KERN_ERR "blacklisted by %s\n", name);
return -ENODEV;
}
xdev = interface_to_usbdev(udev);
interface = udev->cur_altsetting;
usb_get_dev(xdev);
status = -ENOMEM;
/* set up our own records */
net = alloc_etherdev(sizeof(*dev));
if (!net) {
printk(KERN_ERR "can't kmalloc dev");
goto out;
}
dev = netdev_priv(net);
dev->udev = xdev;
dev->intf = udev;
dev->driver_info = info;
dev->driver_name = name;
dev->msg_enable = netif_msg_init(msg_level, NETIF_MSG_DRV |
NETIF_MSG_PROBE | NETIF_MSG_LINK);
skb_queue_head_init(&dev->rxq);
skb_queue_head_init(&dev->txq);
skb_queue_head_init(&dev->done);
dev->bh.func = axusbnet_bh;
dev->bh.data = (unsigned long) dev;
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 20)
INIT_WORK(&dev->kevent, kevent, dev);
#else
INIT_WORK(&dev->kevent, kevent);
#endif
dev->delay.function = axusbnet_bh;
dev->delay.data = (unsigned long) dev;
init_timer(&dev->delay);
/* mutex_init(&dev->phy_mutex); */
dev->net = net;
/* rx and tx sides can use different message sizes;
* bind() should set rx_urb_size in that case.
*/
dev->hard_mtu = net->mtu + net->hard_header_len;
#if 0
/* dma_supported() is deeply broken on almost all architectures */
/* possible with some EHCI controllers */
if (dma_supported(&udev->dev, DMA_BIT_MASK(64)))
net->features |= NETIF_F_HIGHDMA;
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 30)
net->open = axusbnet_open,
net->stop = axusbnet_stop,
net->hard_start_xmit = axusbnet_start_xmit,
net->tx_timeout = axusbnet_tx_timeout,
net->get_stats = axusbnet_get_stats;
#endif
net->watchdog_timeo = TX_TIMEOUT_JIFFIES;
net->ethtool_ops = &axusbnet_ethtool_ops;
/* allow device-specific bind/init procedures */
/* NOTE net->name still not usable ... */
status = info->bind(dev, udev);
if (status < 0) {
deverr(dev, "Binding device failed: %d", status);
goto out1;
}
/* maybe the remote can't receive an Ethernet MTU */
if (net->mtu > (dev->hard_mtu - net->hard_header_len))
net->mtu = dev->hard_mtu - net->hard_header_len;
status = init_status(dev, udev);
if (status < 0)
goto out3;
if (!dev->rx_urb_size)
dev->rx_urb_size = dev->hard_mtu;
dev->maxpacket = usb_maxpacket(dev->udev, dev->out, 1);
SET_NETDEV_DEV(net, &udev->dev);
status = register_netdev(net);
if (status) {
deverr(dev, "net device registration failed: %d", status);
goto out3;
}
if (netif_msg_probe(dev))
devinfo(dev, "register '%s' at usb-%s-%s, %s, %pM",
udev->dev.driver->name,
xdev->bus->bus_name, xdev->devpath,
dev->driver_info->description,
net->dev_addr);
/* ok, it's ready to go. */
usb_set_intfdata(udev, dev);
/* start as if the link is up */
netif_device_attach(net);
return 0;
out3:
if (info->unbind)
info->unbind(dev, udev);
out1:
free_netdev(net);
out:
usb_put_dev(xdev);
return status;
}
/*-------------------------------------------------------------------------*/
/*
* suspend the whole driver as soon as the first interface is suspended
* resume only when the last interface is resumed
*/
static int axusbnet_suspend(struct usb_interface *intf,
#if LINUX_VERSION_CODE > KERNEL_VERSION(2, 6, 10)
pm_message_t message)
#else
u32 message)
#endif
{
struct usbnet *dev = usb_get_intfdata(intf);
if (!dev->suspend_count++) {
/*
* accelerate emptying of the rx and queues, to avoid
* having everything error out.
*/
netif_device_detach(dev->net);
(void) unlink_urbs(dev, &dev->rxq);
(void) unlink_urbs(dev, &dev->txq);
usb_kill_urb(dev->interrupt);
/*
* reattach so runtime management can use and
* wake the device
*/
netif_device_attach(dev->net);
}
return 0;
}
static int
axusbnet_resume(struct usb_interface *intf)
{
struct usbnet *dev = usb_get_intfdata(intf);
int retval = 0;
if (!--dev->suspend_count)
tasklet_schedule(&dev->bh);
retval = init_status(dev, intf);
if (retval < 0)
return retval;
if (dev->interrupt) {
retval = usb_submit_urb(dev->interrupt, GFP_KERNEL);
if (retval < 0 && netif_msg_ifup(dev))
deverr(dev, "intr submit %d", retval);
}
return retval;
}
static int usbnet_start_xmit (struct sk_buff *skb, struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
int length;
int retval = NET_XMIT_SUCCESS;
struct urb *urb = NULL;
struct skb_data *entry;
struct driver_info *info = dev->driver_info;
unsigned long flags;
// some devices want funky USB-level framing, for
// win32 driver (usually) and/or hardware quirks
if (info->tx_fixup) {
skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
if (!skb) {
if (netif_msg_tx_err (dev))
devdbg (dev, "can't tx_fixup skb");
goto drop;
}
}
length = skb->len;
if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
if (netif_msg_tx_err (dev))
devdbg (dev, "no urb");
goto drop;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = tx_start;
entry->length = length;
usb_fill_bulk_urb (urb, dev->udev, dev->out,
skb->data, skb->len, tx_complete, skb);
/* don't assume the hardware handles USB_ZERO_PACKET
* NOTE: strictly conforming cdc-ether devices should expect
* the ZLP here, but ignore the one-byte packet.
*/
if ((length % dev->maxpacket) == 0) {
urb->transfer_buffer_length++;
if (skb_tailroom(skb)) {
skb->data[skb->len] = 0;
__skb_put(skb, 1);
}
}
spin_lock_irqsave (&dev->txq.lock, flags);
switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
case -EPIPE:
netif_stop_queue (net);
usbnet_defer_kevent (dev, EVENT_TX_HALT);
break;
default:
if (netif_msg_tx_err (dev))
devdbg (dev, "tx: submit urb err %d", retval);
break;
case 0:
net->trans_start = jiffies;
__skb_queue_tail (&dev->txq, skb);
if (dev->txq.qlen >= TX_QLEN (dev))
netif_stop_queue (net);
}
spin_unlock_irqrestore (&dev->txq.lock, flags);
if (retval) {
if (netif_msg_tx_err (dev))
devdbg (dev, "drop, code %d", retval);
drop:
retval = NET_XMIT_SUCCESS;
dev->stats.tx_dropped++;
if (skb)
dev_kfree_skb_any (skb);
usb_free_urb (urb);
} else if (netif_msg_tx_queued (dev)) {
devdbg (dev, "> tx, len %d, type 0x%x",
length, skb->protocol);
}
return retval;
}
netdev_tx_t mpodp_start_xmit(struct sk_buff *skb,
struct net_device *netdev)
{
struct mpodp_if_priv *priv = netdev_priv(netdev);
struct mpodp_tx *tx;
struct dma_async_tx_descriptor *dma_txd;
struct mpodp_cache_entry *entry;
int ret;
uint8_t fifo_mode;
int16_t requested_engine;
struct mpodp_pkt_hdr *hdr;
uint32_t tx_autoloop_next;
uint32_t tx_submitted, tx_next, tx_done;
uint32_t tx_mppa_idx;
int qidx;
unsigned long flags = 0;
struct mpodp_txq *txq;
/* Fetch HW queue selected by the kernel */
qidx = skb_get_queue_mapping(skb);
txq = &priv->txqs[qidx];
if (atomic_read(&priv->reset) == 1) {
mpodp_clean_tx_unlocked(priv, txq, -1);
goto addr_error;
}
tx_submitted = atomic_read(&txq->submitted);
/* Compute txd id */
tx_next = (tx_submitted + 1);
if (tx_next == txq->size)
tx_next = 0;
/* MPPA H2C Entry to use */
tx_mppa_idx = atomic_read(&txq->autoloop_cur);
tx_done = atomic_read(&txq->done);
if (tx_done != tx_submitted &&
((txq->ring[tx_done].jiffies + msecs_to_jiffies(5) >= jiffies) ||
(tx_submitted < tx_done && tx_submitted + txq->size - tx_done >= TX_POLL_THRESHOLD) ||
(tx_submitted >= tx_done && tx_submitted - tx_done >= TX_POLL_THRESHOLD))) {
mpodp_clean_tx_unlocked(priv, txq, -1);
}
/* Check if there are txd available */
if (tx_next == atomic_read(&txq->done)) {
/* Ring is full */
if (netif_msg_tx_err(priv))
netdev_err(netdev, "txq[%d]: ring full \n", txq->id);
netif_tx_stop_queue(txq->txq);
return NETDEV_TX_BUSY;
}
tx = &(txq->ring[tx_submitted]);
entry = &(txq->cache[tx_mppa_idx]);
/* take the time */
mppa_pcie_time_get(priv->tx_time, &tx->time);
/* configure channel */
tx->dst_addr = entry->addr;
/* Check the provided address */
ret =
mppa_pcie_dma_check_addr(priv->pdata, tx->dst_addr, &fifo_mode,
&requested_engine);
if (ret) {
if (netif_msg_tx_err(priv))
netdev_err(netdev, "txq[%d] tx[%d]: invalid send address %llx\n",
txq->id, tx_submitted, tx->dst_addr);
goto addr_error;
}
if (!fifo_mode) {
if (netif_msg_tx_err(priv))
netdev_err(netdev, "txq[%d] tx[%d]: %llx is not a PCI2Noc addres\n",
txq->id, tx_submitted, tx->dst_addr);
goto addr_error;
}
if (requested_engine >= MPODP_NOC_CHAN_COUNT) {
if (netif_msg_tx_err(priv))
netdev_err(netdev,
"txq[%d] tx[%d]: address %llx using NoC engine out of range (%d >= %d)\n",
txq->id, tx_submitted, tx->dst_addr,
requested_engine, MPODP_NOC_CHAN_COUNT);
goto addr_error;
}
tx->chanidx = requested_engine;
/* The packet needs a header to determine size,timestamp, etc.
* Add it */
if (skb_headroom(skb) < sizeof(struct mpodp_pkt_hdr)) {
struct sk_buff *skb_new;
skb_new =
skb_realloc_headroom(skb, sizeof(struct mpodp_pkt_hdr));
if (!skb_new) {
netdev->stats.tx_errors++;
kfree_skb(skb);
return NETDEV_TX_OK;
}
kfree_skb(skb);
skb = skb_new;
}
hdr = (struct mpodp_pkt_hdr *)
skb_push(skb, sizeof(struct mpodp_pkt_hdr));
hdr->timestamp = priv->packet_id;
hdr->info._.pkt_id = priv->packet_id;
hdr->info.dword = 0ULL;
hdr->info._.pkt_size = skb->len; /* Also count the header size */
hdr->info._.pkt_id = priv->packet_id;
priv->packet_id++;
/* save skb to free it later */
tx->skb = skb;
tx->len = skb->len;
/* prepare sg */
if (map_skb(&priv->pdev->dev, skb, tx)){
if (netif_msg_tx_err(priv))
netdev_err(netdev, "tx %d: failed to map skb to dma\n",
tx_submitted);
goto busy;
}
if (priv->n_txqs > MPODP_NOC_CHAN_COUNT)
spin_lock_irqsave(&priv->tx_lock[requested_engine], flags);
/* Prepare slave args */
priv->tx_config[requested_engine].cfg.dst_addr = tx->dst_addr;
priv->tx_config[requested_engine].requested_engine = requested_engine;
/* FIFO mode, direction, latency were filled at setup */
if (dmaengine_slave_config(priv->tx_chan[requested_engine],
&priv->tx_config[requested_engine].cfg)) {
/* board has reset, wait for reset of netdev */
netif_tx_stop_queue(txq->txq);
netif_carrier_off(netdev);
if (netif_msg_tx_err(priv))
netdev_err(netdev, "txq[%d] tx[%d]: cannot configure channel\n",
txq->id, tx_submitted);
goto busy;
}
/* get transfer descriptor */
dma_txd =
dmaengine_prep_slave_sg(priv->tx_chan[requested_engine], tx->sg,
tx->sg_len, DMA_MEM_TO_DEV, 0);
if (dma_txd == NULL) {
/* dmaengine_prep_slave_sg failed, retry */
if (netif_msg_tx_err(priv))
netdev_err(netdev, "txq[%d] tx[%d]: cannot get dma descriptor\n",
txq->id, tx_submitted);
goto busy;
}
if (netif_msg_tx_queued(priv))
netdev_info(netdev,
"txq[%d] tx[%d]: transfer start (submitted: %d done: %d) len=%d, sg_len=%d\n",
txq->id, tx_submitted, tx_next, atomic_read(&txq->done),
tx->len, tx->sg_len);
skb_orphan(skb);
/* submit and issue descriptor */
tx->jiffies = jiffies;
tx->cookie = dmaengine_submit(dma_txd);
dma_async_issue_pending(priv->tx_chan[requested_engine]);
if (priv->n_txqs > MPODP_NOC_CHAN_COUNT)
spin_unlock_irqrestore(&priv->tx_lock[requested_engine], flags);
/* Count number of bytes on the fly for DQL */
netdev_tx_sent_queue(txq->txq, skb->len);
if (test_bit(__QUEUE_STATE_STACK_XOFF, &txq->txq->state)){
/* We reached over the limit of DQL. Try to clean some
* tx so we are rescheduled right now */
mpodp_clean_tx_unlocked(priv, txq, -1);
}
/* Increment tail pointer locally */
atomic_set(&txq->submitted, tx_next);
/* Update H2C entry offset */
tx_autoloop_next = tx_mppa_idx + 1;
if (tx_autoloop_next == txq->cached_head)
tx_autoloop_next = 0;
atomic_set(&txq->autoloop_cur, tx_autoloop_next);
skb_tx_timestamp(skb);
/* Check if there is room for another txd
* or stop the queue if there is not */
tx_next = (tx_next + 1);
if (tx_next == txq->size)
tx_next = 0;
if (tx_next == atomic_read(&txq->done)) {
if (netif_msg_tx_queued(priv))
netdev_info(netdev, "txq[%d]: ring full \n", txq->id);
netif_tx_stop_queue(txq->txq);
}
return NETDEV_TX_OK;
busy:
unmap_skb(&priv->pdev->dev, skb, tx);
return NETDEV_TX_BUSY;
addr_error:
netdev->stats.tx_dropped++;
dev_kfree_skb(skb);
/* We can't do anything, just stop the queue artificially */
netif_tx_stop_queue(txq->txq);
return NETDEV_TX_OK;
}
void mpodp_tx_timeout(struct net_device *netdev)
{
struct mpodp_if_priv *priv = netdev_priv(netdev);
if (netif_msg_tx_err(priv))
netdev_err(netdev, "tx timeout\n");
}
static void tx_complete (struct urb *urb)
{
struct sk_buff *skb = (struct sk_buff *) urb->context;
struct skb_data *entry = (struct skb_data *) skb->cb;
struct usbnet *dev = entry->dev;
#ifdef TX_URB_MONITOR
unsigned char b_usb_if_num = 0;
int iRet = get_usb_interface(urb, &b_usb_if_num);
#endif //#ifdef TX_URB_MONITOR
if (urb->status == 0)
{
if (!(dev->driver_info->flags & FLAG_MULTI_PACKET))
dev->net->stats.tx_packets++;
dev->net->stats.tx_bytes += entry->length;
}
else
{
dev->net->stats.tx_errors++;
switch (urb->status)
{
case -EPIPE:
usbnet_defer_kevent (dev, EVENT_TX_HALT);
break;
/* software-driven interface shutdown */
case -ECONNRESET: // async unlink
case -ESHUTDOWN: // hardware gone
break;
// like rx, tx gets controller i/o faults during khubd delays
// and so it uses the same throttling mechanism.
case -EPROTO:
case -ETIME:
case -EILSEQ:
if (!timer_pending (&dev->delay)) {
mod_timer (&dev->delay,
jiffies + THROTTLE_JIFFIES);
if (netif_msg_link (dev))
#if (LINUX_VERSION_CODE != KERNEL_VERSION( 3,0,6 ))
devdbg (dev, "tx throttle %d",
urb->status);
#else
netif_dbg(dev, link, dev->net,
"tx throttle %d\n", urb->status);
#endif
}
netif_stop_queue (dev->net);
break;
default:
if (netif_msg_tx_err (dev))
#if (LINUX_VERSION_CODE != KERNEL_VERSION( 3,0,6 ))
devdbg (dev, "tx err %d", entry->urb->status);
#else
netif_dbg(dev, tx_err, dev->net,
"tx err %d\n", entry->urb->status);
#endif
break;
}
}
usb_autopm_put_interface_async(dev->intf);
urb->dev = NULL;
entry->state = tx_done;
defer_bh(dev, skb, &dev->txq);
#ifdef TX_URB_MONITOR
if ((URB_monitor) && (0==iRet))
{
URB_monitor(false, b_usb_if_num);
}
#endif //#ifdef TX_URB_MONITOR
}
static void cyrf6936_rx_tx(struct cyrf6936_net *p)
{
u8 val, *data;
size_t rx_len;
struct sk_buff *skb;
/* update signal level */
cyrf6936_iw_rssi(p);
/* rx */
val = cyrf6936_rreg(p, RX_IRQ_STATUS);
if (val & RXE_IRQ)
goto err_rxe;
if (val & RXC_IRQ) {
/* debouncing, 2nd read */
val = cyrf6936_rreg(p, RX_IRQ_STATUS);
if (val & RXE_IRQ)
goto err_rxe;
/* get data length*/
rx_len = cyrf6936_rreg(p, RX_LENGTH);
/* allocate buffer */
skb = dev_alloc_skb(rx_len + NET_IP_ALIGN);
if (!skb)
goto err_oom;
skb_reserve(skb, NET_IP_ALIGN);
data = skb_put(skb, rx_len);
/* read data */
cyrf6936_wreg(p, RX_IRQ_STATUS, RXOW_IRQ);
while (rx_len--)
*data++ = cyrf6936_rreg(p, RX_BUFFER);
/* dump received packet data */
if (netif_msg_pktdata(p))
print_hex_dump_bytes("cyrf6936 rx data: ",
DUMP_PREFIX_NONE, skb->data, skb->len);
skb->dev = p->netdev;
skb->protocol = htons(ETH_P_ALL);
skb->ip_summed = CHECKSUM_UNNECESSARY;
p->stats.rx_packets++;
p->stats.rx_bytes += rx_len;
netif_rx_ni(skb);
cyrf6936_rx_enable(p);
}
/* tx */
val = cyrf6936_rreg(p, TX_IRQ_STATUS);
if (val & TXE_IRQ)
goto err_txe;
if (val & TXC_IRQ) {
/* debouncing, 2nd read */
val = cyrf6936_rreg(p, TX_IRQ_STATUS);
if (val & TXE_IRQ)
goto err_txe;
/* tx ok*/
p->stats.tx_packets++;
p->stats.tx_bytes += p->tx_skb->len;
if (netif_msg_tx_done(p))
dev_dbg(&p->netdev->dev, "tx done\n");
dev_kfree_skb(p->tx_skb);
p->tx_skb = NULL;
netif_wake_queue(p->netdev);
cyrf6936_rx_enable(p);
}
if (!p->pollmode)
enable_irq(p->netdev->irq);
return;
err_rxe:
if (netif_msg_rx_err(p))
dev_info(&p->netdev->dev, "rx error\n");
p->stats.rx_errors++;
cyrf6936_rx_enable(p);
return;
err_txe:
if (netif_msg_tx_err(p))
dev_info(&p->netdev->dev, "tx error\n");
p->stats.tx_errors++;
cyrf6936_rx_enable(p);
return;
err_oom:
dev_err(&p->netdev->dev, "out of memory, packet dropped\n");
p->stats.rx_dropped++;
cyrf6936_rx_enable(p);
}
netdev_tx_t usbnet_start_xmit (struct sk_buff *skb,
struct net_device *net)
{
struct usbnet *dev = netdev_priv(net);
int length;
struct urb *urb = NULL;
struct skb_data *entry;
struct driver_info *info = dev->driver_info;
unsigned long flags;
int retval;
// some devices want funky USB-level framing, for
// win32 driver (usually) and/or hardware quirks
if (info->tx_fixup) {
skb = info->tx_fixup (dev, skb, GFP_ATOMIC);
if (!skb) {
if (netif_msg_tx_err(dev)) {
netif_dbg(dev, tx_err, dev->net, "can't tx_fixup skb\n");
goto drop;
} else {
/* cdc_ncm collected packet; waits for more */
goto not_drop;
}
}
}
length = skb->len;
if (!(urb = usb_alloc_urb (0, GFP_ATOMIC))) {
netif_dbg(dev, tx_err, dev->net, "no urb\n");
goto drop;
}
entry = (struct skb_data *) skb->cb;
entry->urb = urb;
entry->dev = dev;
entry->state = tx_start;
entry->length = length;
usb_fill_bulk_urb (urb, dev->udev, dev->out,
skb->data, skb->len, tx_complete, skb);
/* don't assume the hardware handles USB_ZERO_PACKET
* NOTE: strictly conforming cdc-ether devices should expect
* the ZLP here, but ignore the one-byte packet.
* NOTE2: CDC NCM specification is different from CDC ECM when
* handling ZLP/short packets, so cdc_ncm driver will make short
* packet itself if needed.
*/
if (length % dev->maxpacket == 0) {
if (!(info->flags & FLAG_SEND_ZLP)) {
if (!(info->flags & FLAG_MULTI_PACKET)) {
urb->transfer_buffer_length++;
if (skb_tailroom(skb)) {
skb->data[skb->len] = 0;
__skb_put(skb, 1);
}
}
} else
urb->transfer_flags |= URB_ZERO_PACKET;
}
spin_lock_irqsave(&dev->txq.lock, flags);
retval = usb_autopm_get_interface_async(dev->intf);
if (retval < 0) {
spin_unlock_irqrestore(&dev->txq.lock, flags);
goto drop;
}
#ifdef CONFIG_PM
/* if this triggers the device is still a sleep */
if (test_bit(EVENT_DEV_ASLEEP, &dev->flags)) {
/* transmission will be done in resume */
usb_anchor_urb(urb, &dev->deferred);
/* no use to process more packets */
netif_stop_queue(net);
spin_unlock_irqrestore(&dev->txq.lock, flags);
netdev_dbg(dev->net, "Delaying transmission for resumption\n");
goto deferred;
}
#endif
switch ((retval = usb_submit_urb (urb, GFP_ATOMIC))) {
case -EPIPE:
netif_stop_queue (net);
usbnet_defer_kevent (dev, EVENT_TX_HALT);
usb_autopm_put_interface_async(dev->intf);
break;
default:
usb_autopm_put_interface_async(dev->intf);
netif_dbg(dev, tx_err, dev->net,
"tx: submit urb err %d\n", retval);
break;
case 0:
net->trans_start = jiffies;
__skb_queue_tail (&dev->txq, skb);
if (dev->txq.qlen >= TX_QLEN (dev))
netif_stop_queue (net);
}
spin_unlock_irqrestore (&dev->txq.lock, flags);
if (retval) {
netif_dbg(dev, tx_err, dev->net, "drop, code %d\n", retval);
drop:
dev->net->stats.tx_dropped++;
not_drop:
if (skb)
dev_kfree_skb_any (skb);
usb_free_urb (urb);
} else
netif_dbg(dev, tx_queued, dev->net,
"> tx, len %d, type 0x%x\n", length, skb->protocol);
#ifdef CONFIG_PM
deferred:
#endif
return NETDEV_TX_OK;
}
netdev_tx_t mlx4_en_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct skb_shared_info *shinfo = skb_shinfo(skb);
struct mlx4_en_priv *priv = netdev_priv(dev);
union mlx4_wqe_qpn_vlan qpn_vlan = {};
struct mlx4_en_tx_ring *ring;
struct mlx4_en_tx_desc *tx_desc;
struct mlx4_wqe_data_seg *data;
struct mlx4_en_tx_info *tx_info;
int tx_ind;
int nr_txbb;
int desc_size;
int real_size;
u32 index, bf_index;
__be32 op_own;
int lso_header_size;
void *fragptr = NULL;
bool bounce = false;
bool send_doorbell;
bool stop_queue;
bool inline_ok;
u8 data_offset;
u32 ring_cons;
bool bf_ok;
tx_ind = skb_get_queue_mapping(skb);
ring = priv->tx_ring[TX][tx_ind];
if (unlikely(!priv->port_up))
goto tx_drop;
/* fetch ring->cons far ahead before needing it to avoid stall */
ring_cons = READ_ONCE(ring->cons);
real_size = get_real_size(skb, shinfo, dev, &lso_header_size,
&inline_ok, &fragptr);
if (unlikely(!real_size))
goto tx_drop_count;
/* Align descriptor to TXBB size */
desc_size = ALIGN(real_size, TXBB_SIZE);
nr_txbb = desc_size >> LOG_TXBB_SIZE;
if (unlikely(nr_txbb > MAX_DESC_TXBBS)) {
if (netif_msg_tx_err(priv))
en_warn(priv, "Oversized header or SG list\n");
goto tx_drop_count;
}
bf_ok = ring->bf_enabled;
if (skb_vlan_tag_present(skb)) {
u16 vlan_proto;
qpn_vlan.vlan_tag = cpu_to_be16(skb_vlan_tag_get(skb));
vlan_proto = be16_to_cpu(skb->vlan_proto);
if (vlan_proto == ETH_P_8021AD)
qpn_vlan.ins_vlan = MLX4_WQE_CTRL_INS_SVLAN;
else if (vlan_proto == ETH_P_8021Q)
qpn_vlan.ins_vlan = MLX4_WQE_CTRL_INS_CVLAN;
else
qpn_vlan.ins_vlan = 0;
bf_ok = false;
}
netdev_txq_bql_enqueue_prefetchw(ring->tx_queue);
/* Track current inflight packets for performance analysis */
AVG_PERF_COUNTER(priv->pstats.inflight_avg,
(u32)(ring->prod - ring_cons - 1));
/* Packet is good - grab an index and transmit it */
index = ring->prod & ring->size_mask;
bf_index = ring->prod;
/* See if we have enough space for whole descriptor TXBB for setting
* SW ownership on next descriptor; if not, use a bounce buffer. */
if (likely(index + nr_txbb <= ring->size))
tx_desc = ring->buf + (index << LOG_TXBB_SIZE);
else {
tx_desc = (struct mlx4_en_tx_desc *) ring->bounce_buf;
bounce = true;
bf_ok = false;
}
/* Save skb in tx_info ring */
tx_info = &ring->tx_info[index];
tx_info->skb = skb;
tx_info->nr_txbb = nr_txbb;
if (!lso_header_size) {
data = &tx_desc->data;
data_offset = offsetof(struct mlx4_en_tx_desc, data);
} else {
u32 mlx4_en_recycle_tx_desc(struct mlx4_en_priv *priv,
struct mlx4_en_tx_ring *ring,
int index, u64 timestamp,
int napi_mode)
{
struct mlx4_en_tx_info *tx_info = &ring->tx_info[index];
struct mlx4_en_rx_alloc frame = {
.page = tx_info->page,
.dma = tx_info->map0_dma,
};
if (!mlx4_en_rx_recycle(ring->recycle_ring, &frame)) {
dma_unmap_page(priv->ddev, tx_info->map0_dma,
PAGE_SIZE, priv->dma_dir);
put_page(tx_info->page);
}
return tx_info->nr_txbb;
}
int mlx4_en_free_tx_buf(struct net_device *dev, struct mlx4_en_tx_ring *ring)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
int cnt = 0;
/* Skip last polled descriptor */
ring->cons += ring->last_nr_txbb;
en_dbg(DRV, priv, "Freeing Tx buf - cons:0x%x prod:0x%x\n",
ring->cons, ring->prod);
if ((u32) (ring->prod - ring->cons) > ring->size) {
if (netif_msg_tx_err(priv))
en_warn(priv, "Tx consumer passed producer!\n");
return 0;
}
while (ring->cons != ring->prod) {
ring->last_nr_txbb = ring->free_tx_desc(priv, ring,
ring->cons & ring->size_mask,
0, 0 /* Non-NAPI caller */);
ring->cons += ring->last_nr_txbb;
cnt++;
}
if (ring->tx_queue)
netdev_tx_reset_queue(ring->tx_queue);
if (cnt)
en_dbg(DRV, priv, "Freed %d uncompleted tx descriptors\n", cnt);
return cnt;
}
bool mlx4_en_process_tx_cq(struct net_device *dev,
struct mlx4_en_cq *cq, int napi_budget)
{
struct mlx4_en_priv *priv = netdev_priv(dev);
struct mlx4_cq *mcq = &cq->mcq;
struct mlx4_en_tx_ring *ring = priv->tx_ring[cq->type][cq->ring];
struct mlx4_cqe *cqe;
u16 index, ring_index, stamp_index;
u32 txbbs_skipped = 0;
u32 txbbs_stamp = 0;
u32 cons_index = mcq->cons_index;
int size = cq->size;
u32 size_mask = ring->size_mask;
struct mlx4_cqe *buf = cq->buf;
u32 packets = 0;
u32 bytes = 0;
int factor = priv->cqe_factor;
int done = 0;
int budget = priv->tx_work_limit;
u32 last_nr_txbb;
u32 ring_cons;
if (unlikely(!priv->port_up))
return true;
netdev_txq_bql_complete_prefetchw(ring->tx_queue);
index = cons_index & size_mask;
cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor;
last_nr_txbb = READ_ONCE(ring->last_nr_txbb);
ring_cons = READ_ONCE(ring->cons);
ring_index = ring_cons & size_mask;
stamp_index = ring_index;
/* Process all completed CQEs */
while (XNOR(cqe->owner_sr_opcode & MLX4_CQE_OWNER_MASK,
cons_index & size) && (done < budget)) {
u16 new_index;
/*
* make sure we read the CQE after we read the
* ownership bit
*/
dma_rmb();
if (unlikely((cqe->owner_sr_opcode & MLX4_CQE_OPCODE_MASK) ==
MLX4_CQE_OPCODE_ERROR)) {
struct mlx4_err_cqe *cqe_err = (struct mlx4_err_cqe *)cqe;
en_err(priv, "CQE error - vendor syndrome: 0x%x syndrome: 0x%x\n",
cqe_err->vendor_err_syndrome,
cqe_err->syndrome);
}
/* Skip over last polled CQE */
new_index = be16_to_cpu(cqe->wqe_index) & size_mask;
do {
u64 timestamp = 0;
txbbs_skipped += last_nr_txbb;
ring_index = (ring_index + last_nr_txbb) & size_mask;
if (unlikely(ring->tx_info[ring_index].ts_requested))
timestamp = mlx4_en_get_cqe_ts(cqe);
/* free next descriptor */
last_nr_txbb = ring->free_tx_desc(
priv, ring, ring_index,
timestamp, napi_budget);
mlx4_en_stamp_wqe(priv, ring, stamp_index,
!!((ring_cons + txbbs_stamp) &
ring->size));
stamp_index = ring_index;
txbbs_stamp = txbbs_skipped;
packets++;
bytes += ring->tx_info[ring_index].nr_bytes;
} while ((++done < budget) && (ring_index != new_index));
++cons_index;
index = cons_index & size_mask;
cqe = mlx4_en_get_cqe(buf, index, priv->cqe_size) + factor;
}
/*
* To prevent CQ overflow we first update CQ consumer and only then
* the ring consumer.
*/
mcq->cons_index = cons_index;
mlx4_cq_set_ci(mcq);
wmb();
/* we want to dirty this cache line once */
WRITE_ONCE(ring->last_nr_txbb, last_nr_txbb);
WRITE_ONCE(ring->cons, ring_cons + txbbs_skipped);
if (cq->type == TX_XDP)
return done < budget;
netdev_tx_completed_queue(ring->tx_queue, packets, bytes);
/* Wakeup Tx queue if this stopped, and ring is not full.
*/
if (netif_tx_queue_stopped(ring->tx_queue) &&
!mlx4_en_is_tx_ring_full(ring)) {
netif_tx_wake_queue(ring->tx_queue);
ring->wake_queue++;
}
return done < budget;
}
void mlx4_en_tx_irq(struct mlx4_cq *mcq)
{
struct mlx4_en_cq *cq = container_of(mcq, struct mlx4_en_cq, mcq);
struct mlx4_en_priv *priv = netdev_priv(cq->dev);
if (likely(priv->port_up))
napi_schedule_irqoff(&cq->napi);
else
mlx4_en_arm_cq(priv, cq);
}
/* TX CQ polling - called by NAPI */
int mlx4_en_poll_tx_cq(struct napi_struct *napi, int budget)
{
struct mlx4_en_cq *cq = container_of(napi, struct mlx4_en_cq, napi);
struct net_device *dev = cq->dev;
struct mlx4_en_priv *priv = netdev_priv(dev);
bool clean_complete;
clean_complete = mlx4_en_process_tx_cq(dev, cq, budget);
if (!clean_complete)
return budget;
napi_complete(napi);
mlx4_en_arm_cq(priv, cq);
return 0;
}
static struct mlx4_en_tx_desc *mlx4_en_bounce_to_desc(struct mlx4_en_priv *priv,
struct mlx4_en_tx_ring *ring,
u32 index,
unsigned int desc_size)
{
u32 copy = (ring->size - index) << LOG_TXBB_SIZE;
int i;
for (i = desc_size - copy - 4; i >= 0; i -= 4) {
if ((i & (TXBB_SIZE - 1)) == 0)
wmb();
*((u32 *) (ring->buf + i)) =
*((u32 *) (ring->bounce_buf + copy + i));
}
for (i = copy - 4; i >= 4 ; i -= 4) {
if ((i & (TXBB_SIZE - 1)) == 0)
wmb();
*((u32 *)(ring->buf + (index << LOG_TXBB_SIZE) + i)) =
*((u32 *) (ring->bounce_buf + i));
}
/* Return real descriptor location */
return ring->buf + (index << LOG_TXBB_SIZE);
}
/* work that cannot be done in interrupt context uses keventd.
*
* NOTE: with 2.5 we could do more of this using completion callbacks,
* especially now that control transfers can be queued.
*/
static void
kevent (struct work_struct *work)
{
struct usbnet *dev =
container_of(work, struct usbnet, kevent);
int status;
/* usb_clear_halt() needs a thread context */
if (test_bit (EVENT_TX_HALT, &dev->flags)) {
unlink_urbs (dev, &dev->txq);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto fail_pipe;
status = usb_clear_halt (dev->udev, dev->out);
usb_autopm_put_interface(dev->intf);
if (status < 0 &&
status != -EPIPE &&
status != -ESHUTDOWN) {
if (netif_msg_tx_err (dev))
fail_pipe:
netdev_err(dev->net, "can't clear tx halt, status %d\n",
status);
} else {
clear_bit (EVENT_TX_HALT, &dev->flags);
if (status != -ESHUTDOWN)
netif_wake_queue (dev->net);
}
}
if (test_bit (EVENT_RX_HALT, &dev->flags)) {
unlink_urbs (dev, &dev->rxq);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto fail_halt;
status = usb_clear_halt (dev->udev, dev->in);
usb_autopm_put_interface(dev->intf);
if (status < 0 &&
status != -EPIPE &&
status != -ESHUTDOWN) {
if (netif_msg_rx_err (dev))
fail_halt:
netdev_err(dev->net, "can't clear rx halt, status %d\n",
status);
} else {
clear_bit (EVENT_RX_HALT, &dev->flags);
tasklet_schedule (&dev->bh);
}
}
/* tasklet could resubmit itself forever if memory is tight */
if (test_bit (EVENT_RX_MEMORY, &dev->flags)) {
struct urb *urb = NULL;
if (netif_running (dev->net))
urb = usb_alloc_urb (0, GFP_KERNEL);
else
clear_bit (EVENT_RX_MEMORY, &dev->flags);
if (urb != NULL) {
clear_bit (EVENT_RX_MEMORY, &dev->flags);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto fail_lowmem;
rx_submit (dev, urb, GFP_KERNEL);
usb_autopm_put_interface(dev->intf);
fail_lowmem:
tasklet_schedule (&dev->bh);
}
}
if (test_bit (EVENT_LINK_RESET, &dev->flags)) {
struct driver_info *info = dev->driver_info;
int retval = 0;
clear_bit (EVENT_LINK_RESET, &dev->flags);
status = usb_autopm_get_interface(dev->intf);
if (status < 0)
goto skip_reset;
if(info->link_reset && (retval = info->link_reset(dev)) < 0) {
usb_autopm_put_interface(dev->intf);
skip_reset:
netdev_info(dev->net, "link reset failed (%d) usbnet usb-%s-%s, %s\n",
retval,
dev->udev->bus->bus_name,
dev->udev->devpath,
info->description);
} else {
usb_autopm_put_interface(dev->intf);
}
}
if (dev->flags)
netdev_dbg(dev->net, "kevent done, flags = 0x%lx\n", dev->flags);
}
/* error control function */
static void sh_eth_error(struct net_device *ndev, int intr_status)
{
struct sh_eth_private *mdp = netdev_priv(ndev);
u32 felic_stat;
u32 link_stat;
u32 mask;
if (intr_status & EESR_ECI) {
felic_stat = sh_eth_read(ndev, ECSR);
sh_eth_write(ndev, felic_stat, ECSR); /* clear int */
if (felic_stat & ECSR_ICD)
mdp->stats.tx_carrier_errors++;
if (felic_stat & ECSR_LCHNG) {
/* Link Changed */
if (mdp->cd->no_psr || mdp->no_ether_link) {
if (mdp->link == PHY_DOWN)
link_stat = 0;
else
link_stat = PHY_ST_LINK;
} else {
link_stat = (sh_eth_read(ndev, PSR));
if (mdp->ether_link_active_low)
link_stat = ~link_stat;
}
if (!(link_stat & PHY_ST_LINK))
sh_eth_rcv_snd_disable(ndev);
else {
/* Link Up */
sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) &
~DMAC_M_ECI, EESIPR);
/*clear int */
sh_eth_write(ndev, sh_eth_read(ndev, ECSR),
ECSR);
sh_eth_write(ndev, sh_eth_read(ndev, EESIPR) |
DMAC_M_ECI, EESIPR);
/* enable tx and rx */
sh_eth_rcv_snd_enable(ndev);
}
}
}
if (intr_status & EESR_TWB) {
/* Write buck end. unused write back interrupt */
if (intr_status & EESR_TABT) /* Transmit Abort int */
mdp->stats.tx_aborted_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit Abort\n");
}
if (intr_status & EESR_RABT) {
/* Receive Abort int */
if (intr_status & EESR_RFRMER) {
/* Receive Frame Overflow int */
mdp->stats.rx_frame_errors++;
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive Abort\n");
}
}
if (intr_status & EESR_TDE) {
/* Transmit Descriptor Empty int */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit Descriptor Empty\n");
}
if (intr_status & EESR_TFE) {
/* FIFO under flow */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Transmit FIFO Under flow\n");
}
if (intr_status & EESR_RDE) {
/* Receive Descriptor Empty int */
mdp->stats.rx_over_errors++;
if (sh_eth_read(ndev, EDRRR) ^ EDRRR_R)
sh_eth_write(ndev, EDRRR_R, EDRRR);
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive Descriptor Empty\n");
}
if (intr_status & EESR_RFE) {
/* Receive FIFO Overflow int */
mdp->stats.rx_fifo_errors++;
if (netif_msg_rx_err(mdp))
dev_err(&ndev->dev, "Receive FIFO Overflow\n");
}
if (!mdp->cd->no_ade && (intr_status & EESR_ADE)) {
/* Address Error */
mdp->stats.tx_fifo_errors++;
if (netif_msg_tx_err(mdp))
dev_err(&ndev->dev, "Address Error\n");
}
mask = EESR_TWB | EESR_TABT | EESR_ADE | EESR_TDE | EESR_TFE;
if (mdp->cd->no_ade)
mask &= ~EESR_ADE;
if (intr_status & mask) {
/* Tx error */
u32 edtrr = sh_eth_read(ndev, EDTRR);
/* dmesg */
dev_err(&ndev->dev, "TX error. status=%8.8x cur_tx=%8.8x ",
intr_status, mdp->cur_tx);
dev_err(&ndev->dev, "dirty_tx=%8.8x state=%8.8x EDTRR=%8.8x.\n",
mdp->dirty_tx, (u32) ndev->state, edtrr);
/* dirty buffer free */
sh_eth_txfree(ndev);
/* SH7712 BUG */
if (edtrr ^ sh_eth_get_edtrr_trns(mdp)) {
/* tx dma start */
sh_eth_write(ndev, sh_eth_get_edtrr_trns(mdp), EDTRR);
}
/* wakeup */
netif_wake_queue(ndev);
}
}
