static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
smd_channel_t *ch = p->ch;
unsigned long flags;
if (netif_queue_stopped(dev)) {
pr_err("[%s] fatal: rmnet_xmit called when netif_queue is stopped",
dev->name);
return 0;
}
spin_lock_irqsave(&p->lock, flags);
smd_enable_read_intr(ch);
if (smd_write_avail(ch) < skb->len) {
netif_stop_queue(dev);
p->skb = skb;
spin_unlock_irqrestore(&p->lock, flags);
return 0;
}
smd_disable_read_intr(ch);
spin_unlock_irqrestore(&p->lock, flags);
_rmnet_xmit(skb, dev);
return 0;
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
unsigned long flags;
int ret = 0;
if (netif_queue_stopped(dev) || (p->device_state == DEVICE_INACTIVE)) {
pr_err("[%s]fatal: rmnet_xmit called when "
"netif_queue is stopped", dev->name);
return 0;
}
spin_lock_irqsave(&p->tx_queue_lock, flags);
ret = _rmnet_xmit(skb, dev);
if (ret == -EAGAIN) {
/*
* EAGAIN means we attempted to overflow the high watermark
* Clearly the queue is not stopped like it should be, so
* stop it and return BUSY to the TCP/IP framework. It will
* retry this packet with the queue is restarted which happens
* low watermark is called.
*/
netif_stop_queue(dev);
ret = NETDEV_TX_BUSY;
}
spin_unlock_irqrestore(&p->tx_queue_lock, flags);
return ret;
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
smd_channel_t *ch = p->ch;
unsigned long flags;
int space;
if (netif_queue_stopped(dev)) {
pr_err("fatal: rmnet_xmit called when netif_queue is stopped");
return 0;
}
spin_lock_irqsave(&p->lock, flags);
smd_enable_read_intr(ch);
if ((space=smd_write_avail(ch)) < skb->len) {
pr_warn("warn: rmnet_xmit returned when no write resources on ch %s, available %d, needed %d\n",
p->chname, space, skb->len);
netif_stop_queue(dev);
p->skb = skb;
spin_unlock_irqrestore(&p->lock, flags);
return 0;
}
smd_disable_read_intr(ch);
spin_unlock_irqrestore(&p->lock, flags);
_rmnet_xmit(skb, dev);
return 0;
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
if (netif_queue_stopped(dev)) {
pr_err("[lte] fatal: rmnet_xmit called when netif_queue is stopped");
return 0;
}
netif_stop_queue(dev);
_rmnet_xmit(skb, dev);
return 0;
}
static void _rmnet_resume_flow(unsigned long param)
{
struct net_device *dev = (struct net_device *)param;
struct rmnet_private *p = netdev_priv(dev);
struct sk_buff *skb = NULL;
unsigned long flags;
spin_lock_irqsave(&p->lock, flags);
if (p->skb && (smd_write_avail(p->ch) >= p->skb->len)) {
skb = p->skb;
p->skb = NULL;
spin_unlock_irqrestore(&p->lock, flags);
_rmnet_xmit(skb, dev);
netif_wake_queue(dev);
} else
spin_unlock_irqrestore(&p->lock, flags);
}
static void _rmnet_resume_flow(unsigned long param)
{
struct net_device *dev = (struct net_device *)param;
struct rmnet_private *p = netdev_priv(dev);
struct sk_buff *skb = NULL;
unsigned long flags;
/* xmit and enable the flow only once even if
multiple tasklets were scheduled by smd_net_notify */
spin_lock_irqsave(&p->lock, flags);
if (p->skb && (smd_write_avail(p->ch) >= p->skb->len)) {
skb = p->skb;
p->skb = NULL;
spin_unlock_irqrestore(&p->lock, flags);
_rmnet_xmit(skb, dev);
netif_wake_queue(dev);
} else
spin_unlock_irqrestore(&p->lock, flags);
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
if (netif_queue_stopped(dev)) {
pr_err("[%s]fatal: rmnet_xmit called when "
"netif_queue is stopped", dev->name);
return 0;
}
_rmnet_xmit(skb, dev);
if (msm_sdio_dmux_is_ch_full(p->ch_id)) {
netif_stop_queue(dev);
DBG0("%s: High WM hit, stopping queue=%p\n", __func__, skb);
}
return 0;
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
unsigned long flags;
if (netif_queue_stopped(dev)) {
pr_err("[%s]fatal: rmnet_xmit called when "
"netif_queue is stopped", dev->name);
return 0;
}
_rmnet_xmit(skb, dev);
spin_lock_irqsave(&p->tx_queue_lock, flags);
if (msm_sdio_dmux_is_ch_full(p->ch_id)) {
netif_stop_queue(dev);
DBG0("%s: High WM hit, stopping queue=%p\n", __func__, skb);
}
spin_unlock_irqrestore(&p->tx_queue_lock, flags);
return 0;
}
static void bam_notify(void *dev, int event, unsigned long data)
{
struct rmnet_private *p = netdev_priv(dev);
unsigned long flags;
switch (event) {
case BAM_DMUX_RECEIVE:
bam_recv_notify(dev, (struct sk_buff *)(data));
break;
case BAM_DMUX_WRITE_DONE:
bam_write_done(dev, (struct sk_buff *)(data));
break;
case BAM_DMUX_UL_CONNECTED:
spin_lock_irqsave(&p->lock, flags);
if (p->waiting_for_ul_skb != NULL) {
struct sk_buff *skb;
int ret;
skb = p->waiting_for_ul_skb;
p->waiting_for_ul_skb = NULL;
spin_unlock_irqrestore(&p->lock, flags);
ret = _rmnet_xmit(skb, dev);
if (ret) {
pr_err("%s: error %d dropping delayed TX SKB %p\n",
__func__, ret, skb);
dev_kfree_skb_any(skb);
}
netif_wake_queue(dev);
} else {
spin_unlock_irqrestore(&p->lock, flags);
}
break;
case BAM_DMUX_UL_DISCONNECTED:
break;
}
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
if (netif_queue_stopped(dev)) {
pr_err("[%s]fatal: rmnet_xmit called when "
"netif_queue is stopped", dev->name);
return 0;
}
if (!ul_is_connected) {
p->waiting_for_ul = 1;
msm_bam_dmux_kickoff_ul_wakeup();
return NETDEV_TX_BUSY;
}
_rmnet_xmit(skb, dev);
if (msm_bam_dmux_is_ch_full(p->ch_id)) {
netif_stop_queue(dev);
DBG0("%s: High WM hit, stopping queue=%p\n", __func__, skb);
}
return 0;
}
static int rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
unsigned long flags;
int awake;
int ret = 0;
if (netif_queue_stopped(dev)) {
pr_err("[%s]fatal: rmnet_xmit called when "
"netif_queue is stopped", dev->name);
return 0;
}
spin_lock_irqsave(&p->lock, flags);
awake = msm_bam_dmux_ul_power_vote();
if (!awake) {
/* send SKB once wakeup is complete */
netif_stop_queue(dev);
p->waiting_for_ul_skb = skb;
spin_unlock_irqrestore(&p->lock, flags);
ret = 0;
goto exit;
}
spin_unlock_irqrestore(&p->lock, flags);
ret = _rmnet_xmit(skb, dev);
if (ret == -EPERM) {
ret = NETDEV_TX_BUSY;
goto exit;
}
/*
* detected SSR a bit early. shut some things down now, and leave
* the rest to the main ssr handling code when that happens later
*/
if (ret == -EFAULT) {
netif_carrier_off(dev);
dev_kfree_skb_any(skb);
ret = 0;
goto exit;
}
if (ret == -EAGAIN) {
/*
* This should not happen
* EAGAIN means we attempted to overflow the high watermark
* Clearly the queue is not stopped like it should be, so
* stop it and return BUSY to the TCP/IP framework. It will
* retry this packet with the queue is restarted which happens
* in the write_done callback when the low watermark is hit.
*/
netif_stop_queue(dev);
ret = NETDEV_TX_BUSY;
goto exit;
}
spin_lock_irqsave(&p->tx_queue_lock, flags);
if (msm_bam_dmux_is_ch_full(p->ch_id)) {
netif_stop_queue(dev);
DBG0("%s: High WM hit, stopping queue=%p\n", __func__, skb);
}
spin_unlock_irqrestore(&p->tx_queue_lock, flags);
exit:
msm_bam_dmux_ul_power_unvote();
return ret;
}
/* Called in soft-irq context */
static void smd_net_data_handler(unsigned long arg)
{
struct net_device *dev = (struct net_device *) arg;
struct rmnet_private *p = netdev_priv(dev);
struct sk_buff *skb;
void *ptr = 0;
int sz;
u32 opmode = p->operation_mode;
// unsigned long flags;
// int max_package_size;
for (;;) {
sz = smd_cur_packet_size(p->ch);
if (sz == 0) break;
if (smd_read_avail(p->ch) < sz) break;
//ZTE_RIL_WANGCHENG_20110425 start
#ifdef CONFIG_ZTE_PLATFORM
if (RMNET_IS_MODE_IP(opmode) ? (sz > ((dev->mtu > RMNET_DEFAULT_MTU_LEN)? dev->mtu:RMNET_DEFAULT_MTU_LEN)) :
(sz > (((dev->mtu > RMNET_DEFAULT_MTU_LEN)? dev->mtu:RMNET_DEFAULT_MTU_LEN) + ETH_HLEN))) {
#else
if (RMNET_IS_MODE_IP(opmode) ? (sz > dev->mtu) :
(sz > (dev->mtu + ETH_HLEN))) {
#endif
pr_err("rmnet_recv() discarding %d len (%d mtu)\n",
sz, RMNET_IS_MODE_IP(opmode) ?
dev->mtu : (dev->mtu + ETH_HLEN));
ptr = 0;
} else {
skb = dev_alloc_skb(sz + NET_IP_ALIGN);
if (skb == NULL) {
pr_err("rmnet_recv() cannot allocate skb\n");
} else {
skb->dev = dev;
skb_reserve(skb, NET_IP_ALIGN);
ptr = skb_put(skb, sz);
wake_lock_timeout(&p->wake_lock, HZ / 2);
if (smd_read(p->ch, ptr, sz) != sz) {
pr_err("rmnet_recv() smd lied about avail?!");
ptr = 0;
dev_kfree_skb_irq(skb);
} else {
/* Handle Rx frame format */
//spin_lock_irqsave(&p->lock, flags);
//opmode = p->operation_mode;
//spin_unlock_irqrestore(&p->lock, flags);
if (RMNET_IS_MODE_IP(opmode)) {
/* Driver in IP mode */
skb->protocol =
rmnet_ip_type_trans(skb, dev);
} else {
/* Driver in Ethernet mode */
skb->protocol =
eth_type_trans(skb, dev);
}
if (RMNET_IS_MODE_IP(opmode) ||
count_this_packet(ptr, skb->len)) {
#ifdef CONFIG_MSM_RMNET_DEBUG
p->wakeups_rcv +=
rmnet_cause_wakeup(p);
#endif
p->stats.rx_packets++;
p->stats.rx_bytes += skb->len;
}
netif_rx(skb);
}
continue;
}
}
if (smd_read(p->ch, ptr, sz) != sz)
pr_err("rmnet_recv() smd lied about avail?!");
}
}
//ZTE_RIL_RJG_20101103 end
static DECLARE_TASKLET(smd_net_data_tasklet, smd_net_data_handler, 0);
static int _rmnet_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct rmnet_private *p = netdev_priv(dev);
smd_channel_t *ch = p->ch;
int smd_ret;
struct QMI_QOS_HDR_S *qmih;
u32 opmode;
unsigned long flags;
/* For QoS mode, prepend QMI header and assign flow ID from skb->mark */
spin_lock_irqsave(&p->lock, flags);
opmode = p->operation_mode;
spin_unlock_irqrestore(&p->lock, flags);
if (RMNET_IS_MODE_QOS(opmode)) {
qmih = (struct QMI_QOS_HDR_S *)
skb_push(skb, sizeof(struct QMI_QOS_HDR_S));
qmih->version = 1;
qmih->flags = 0;
qmih->flow_id = skb->mark;
}
dev->trans_start = jiffies;
smd_ret = smd_write(ch, skb->data, skb->len);
if (smd_ret != skb->len) {
pr_err("%s: smd_write returned error %d", __func__, smd_ret);
goto xmit_out;
}
if (RMNET_IS_MODE_IP(opmode) ||
count_this_packet(skb->data, skb->len)) {
p->stats.tx_packets++;
p->stats.tx_bytes += skb->len;
#ifdef CONFIG_MSM_RMNET_DEBUG
p->wakeups_xmit += rmnet_cause_wakeup(p);
#endif
}
xmit_out:
/* data xmited, safe to release skb */
dev_kfree_skb_irq(skb);
return 0;
}
static void _rmnet_resume_flow(unsigned long param)
{
struct net_device *dev = (struct net_device *)param;
struct rmnet_private *p = netdev_priv(dev);
struct sk_buff *skb = NULL;
unsigned long flags;
/* xmit and enable the flow only once even if
multiple tasklets were scheduled by smd_net_notify */
spin_lock_irqsave(&p->lock, flags);
if (p->skb && (smd_write_avail(p->ch) >= p->skb->len)) {
skb = p->skb;
p->skb = NULL;
spin_unlock_irqrestore(&p->lock, flags);
_rmnet_xmit(skb, dev);
netif_wake_queue(dev);
} else
spin_unlock_irqrestore(&p->lock, flags);
}
static void msm_rmnet_unload_modem(void *pil)
{
if (pil)
pil_put(pil);
}
static void *msm_rmnet_load_modem(struct net_device *dev)
{
void *pil;
int rc;
struct rmnet_private *p = netdev_priv(dev);
pil = pil_get("modem");
if (IS_ERR(pil))
pr_err("%s: modem load failed\n", __func__);
else if (msm_rmnet_modem_wait) {
rc = wait_for_completion_interruptible_timeout(
&p->complete,
msecs_to_jiffies(msm_rmnet_modem_wait * 1000));
if (!rc)
rc = -ETIMEDOUT;
if (rc < 0) {
pr_err("%s: wait for rmnet port failed %d\n",
__func__, rc);
msm_rmnet_unload_modem(pil);
pil = ERR_PTR(rc);
}
}
return pil;
}