static int ccmni_v2_receive(ccmni_v2_instance_t *ccmni, const unsigned char *ccmni_ptr, int ccmni_len)
{
int packet_type, ret = 0;
struct sk_buff *skb;
ccmni_v2_ctl_block_t *ctl_b = (ccmni_v2_ctl_block_t*)ccmni->owner;
int md_id = ctl_b->m_md_id;
if ((ccmni == NULL) || (ccmni_ptr == NULL) || (ccmni_len <= 0))
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d_receive: invalid private data\n", ccmni->channel);
ret = -1;
}
skb = dev_alloc_skb(ccmni_len);
if (skb)
{
packet_type = ccmni_ptr[0] & 0xF0;
memcpy(skb_put(skb, ccmni_len), ccmni_ptr, ccmni_len);
ccmni_make_etherframe(skb->data - ETH_HLEN, ccmni->dev->dev_addr, packet_type);
skb_set_mac_header(skb, -ETH_HLEN);
skb->dev = ccmni->dev;
if(packet_type == IPV6_VERSION)
{
skb->protocol = htons(ETH_P_IPV6);
}
else
{
skb->protocol = htons(ETH_P_IP);
}
//skb->ip_summed = CHECKSUM_UNNECESSARY;
skb->ip_summed = CHECKSUM_NONE;
ret = netif_rx(skb);
CCCI_CCMNI_MSG(md_id, "CCMNI%d invoke netif_rx()=%d\n", ccmni->channel, ret);
ccmni->dev->stats.rx_packets++;
ccmni->dev->stats.rx_bytes += ccmni_len;
CCCI_CCMNI_MSG(md_id, "CCMNI%d rx_pkts=%d, stats_rx_bytes=%d\n",ccmni->channel, \
ccmni->dev->stats.rx_packets,ccmni->dev->stats.rx_bytes);
ret = 0;
}
else
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d Socket buffer allocate fail\n", ccmni->channel);
ret = -CCCI_ERR_MEM_CHECK_FAIL;
}
return ret;
}
static void ccmni_v2_setup(struct net_device *dev)
{
ccmni_v2_instance_t *ccmni = netdev_priv(dev);
int retry = 10;
ether_setup(dev);
dev->header_ops = NULL;
dev->netdev_ops = &ccmni_v2_netdev_ops;
dev->flags = IFF_NOARP & (~IFF_BROADCAST & ~IFF_MULTICAST);
dev->mtu = CCMNI_MTU;
dev->tx_queue_len = CCMNI_TX_QUEUE;
dev->addr_len = ETH_ALEN;
dev->destructor = free_netdev;
while(retry-->0){
random_ether_addr((u8 *) dev->dev_addr);
if(is_mac_addr_duplicate((u8*)dev->dev_addr))
continue;
else
break;
}
CCCI_CCMNI_MSG(ccmni->m_md_id, "CCMNI%d_setup: features=0x%08x,flags=0x%08x\n", ccmni->channel, \
dev->features, dev->flags);
return;
}
static void ccmni_read(unsigned long arg)
{
int part, size;
int ret;
int read, write, consumed;
unsigned char *string;
struct ccmni_instance_t *ccmni = (struct ccmni_instance_t *) arg;
struct ccci_msg_t msg;
struct ccmni_v1_ctl_block_t *ctl_b = (struct ccmni_v1_ctl_block_t *) ccmni->owner;
int md_id = ctl_b->m_md_id;
char *rx_buffer;
spin_lock_bh(&ccmni->spinlock);
if (ctl_b->ccci_is_ready == 0) {
CCCI_DBG_MSG(md_id, "net",
"CCMNI%d_read fail when modem not ready\n",
ccmni->channel);
goto out;
}
string = ccmni->read_buffer;
read = ccmni->shared_mem->rx_control.read;
write = ccmni->shared_mem->rx_control.write;
size = write - read;
part = 0;
rx_buffer = ccmni->shared_mem->buffer;
if (size < 0)
size += ccmni->shared_mem->rx_control.length;
if (read > write) {
part = ccmni->shared_mem->rx_control.length - read;
memcpy(string, &rx_buffer[read], part);
size -= part;
string += part;
read = 0;
}
memcpy(string, &rx_buffer[read], size);
CCCI_CCMNI_MSG(md_id, "CCMNI%d_receive[Before]: size=%d, read=%d\n",
ccmni->channel, (size + part), read);
consumed = ccmni_receive(ccmni, size + part);
CCCI_CCMNI_MSG(md_id, "CCMNI%d_receive[After]: consume=%d\n",
ccmni->channel, consumed);
/* Calculate the new position of the read pointer. */
/* Take into consideration the number of bytes actually consumed; */
/* i.e. number of bytes taken up by complete IP packets. */
read += size;
if (read >= ccmni->shared_mem->rx_control.length)
read -= ccmni->shared_mem->rx_control.length;
if (consumed < (size + part)) {
read -= ((size + part) - consumed);
if (read < 0)
read += ccmni->shared_mem->rx_control.length;
}
ccmni->shared_mem->rx_control.read = read;
/* Send an acknowledgement back to modem side. */
CCCI_CCMNI_MSG(md_id, "CCMNI%d_read to write mailbox(ch%d, tty%d)\n",
ccmni->channel, ccmni->uart_rx_ack,
CCMNI_CHANNEL_OFFSET + ccmni->channel);
/* ret = ccci_write_mailbox(ccmni->uart_rx_ack, CCMNI_CHANNEL_OFFSET + ccmni->channel); */
msg.magic = 0xFFFFFFFF;
msg.id = CCMNI_CHANNEL_OFFSET + ccmni->channel;
msg.channel = ccmni->uart_rx_ack;
msg.reserved = 0;
ret = ccci_message_send(md_id, &msg, 1);
if (ret == -CCCI_ERR_CCIF_NO_PHYSICAL_CHANNEL) {
set_bit(CCMNI_RECV_ACK_PENDING, &ccmni->flags);
mod_timer(&ccmni->timer, jiffies);
} else if (ret == sizeof(struct ccci_msg_t))
clear_bit(CCMNI_RECV_ACK_PENDING, &ccmni->flags);
out:
spin_unlock_bh(&ccmni->spinlock);
CCCI_CCMNI_MSG(md_id, "CCMNI%d_read invoke wake_lock_timeout(1s)\n",
ccmni->channel);
wake_lock_timeout(&ctl_b->ccmni_wake_lock, HZ);
return;
}
static int ccmni_receive(struct ccmni_instance_t *ccmni, int length)
{
int counter, ret;
struct packet_info_t packet_info;
struct complete_ippkt_t *packet;
struct complete_ippkt_t *processed_packet;
struct sk_buff *skb;
struct complete_ippkt_t last_packet = { 0 };
int offset_put_pkt = 0;
int offset_parse_frame = 0;
int packet_type;
struct ccmni_v1_ctl_block_t *ctl_b = (struct ccmni_v1_ctl_block_t *) ccmni->owner;
int md_id = ctl_b->m_md_id;
CCCI_CCMNI_MSG(md_id, "CCMNI%d_receive() invoke pfp_unframe()\n",
ccmni->channel);
do {
packet_info = pfp_unframe(ccmni->decode_buffer + offset_put_pkt,
CCCI1_CCMNI_BUF_SIZE - offset_put_pkt,
ccmni->read_buffer +
offset_parse_frame, length,
ccmni->channel);
packet = packet_info.pkt_list;
CCCI_CCMNI_MSG(md_id,
"CCMNI%d num_complete_pkt=%d after pfp_unframe\n",
ccmni->channel,
packet_info.num_complete_packets);
for (counter = 0; counter < packet_info.num_complete_packets;
counter++) {
skb = dev_alloc_skb(packet->pkt_size);
if (skb) {
packet_type = packet->pkt_data[0] & 0xF0;
memcpy(skb_put(skb, packet->pkt_size),
packet->pkt_data, packet->pkt_size);
ccmni_make_etherframe(skb->data - ETH_HLEN,
ccmni->dev->dev_addr,
packet_type);
skb_set_mac_header(skb, -ETH_HLEN);
skb->dev = ccmni->dev;
if (packet_type == IPV6_VERSION)
skb->protocol = htons(ETH_P_IPV6);
else
skb->protocol = htons(ETH_P_IP);
skb->ip_summed = CHECKSUM_NONE;
ret = netif_rx(skb);
CCCI_CCMNI_MSG(md_id,
"CCMNI%d invoke netif_rx()=%d\n",
ccmni->channel, ret);
ccmni->dev->stats.rx_packets++;
ccmni->dev->stats.rx_bytes += packet->pkt_size;
CCCI_CCMNI_MSG(md_id,
"CCMNI%d rx_pkts=%ld, stats_rx_bytes=%ld\n",
ccmni->channel,
ccmni->dev->stats.rx_packets,
ccmni->dev->stats.rx_bytes);
} else {
CCCI_DBG_MSG(md_id, "net",
"CCMNI%d Socket buffer allocate fail\n",
ccmni->channel);
}
processed_packet = packet;
last_packet = *processed_packet;
packet = packet->next;
/* Only clear the entry_used flag as 0 */
release_one_used_complete_ippkt_entry(processed_packet);
};
/* It must to check if it is necessary to invoke the pfp_unframe()
* again due to no available complete_ippkt entry
*/
if (packet_info.try_decode_again == 1) {
offset_put_pkt +=
(last_packet.pkt_data - ccmni->decode_buffer +
last_packet.pkt_size);
offset_parse_frame += packet_info.consumed_length;
}
} while (packet_info.try_decode_again == 1);
offset_parse_frame += packet_info.consumed_length;
return offset_parse_frame;
}
static int ccmni_v2_create_instance(int md_id, int channel)
{
int ret, size, count;
int uart_rx, uart_rx_ack;
int uart_tx, uart_tx_ack;
ccmni_v2_instance_t *ccmni;
struct net_device *dev = NULL;
int *ccmni_rx_base_phy;
int *ccmni_rx_base_virt;
unsigned char *ptr_virt;
#if CCMNI_DBG_INFO
dbg_info_ccmni_t *dbg_info;
#endif
ccmni_v2_ctl_block_t *ctl_b = (ccmni_v2_ctl_block_t *)ccmni_ctl_block[md_id];
// Network device creation and registration.
dev = alloc_netdev(sizeof(ccmni_v2_instance_t), "", ccmni_v2_setup);
if (dev == NULL)
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d allocate netdev fail!\n", channel);
return -ENOMEM;
}
ccmni = netdev_priv(dev);
ccmni->dev = dev;
ccmni->channel = channel;
ccmni->owner = ccmni_ctl_block[md_id];
if(md_id == 0) {
sprintf(dev->name, "ccmni%d", channel);
} else {
sprintf(dev->name, "cc%dmni%d", md_id+1, channel);
//sprintf(dev->name, "ccmni%d", channel);
}
ret = register_netdev(dev);
if (ret != 0)
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d register netdev fail: %d\n", ccmni->channel, ret);
goto _ccmni_create_instance_exit;
}
ASSERT(ccci_ccmni_v2_ctl_mem_base_req(md_id, ccmni->channel, (int*)&ccmni->shared_mem, \
&ccmni->shared_mem_phys_addr, &size) == 0);
if (ccmni->shared_mem == NULL)
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d allocate memory fail\n", ccmni->channel);
unregister_netdev(dev);
ret = -ENOMEM;
goto _ccmni_create_instance_exit;
}
CCCI_CCMNI_MSG(md_id, "0x%08X:0x%08X:%d\n", (unsigned int)ccmni->shared_mem, \
(unsigned int)ccmni->shared_mem_phys_addr, size);
ccmni->shared_mem->rx_control.read_out = 0;
ccmni->shared_mem->rx_control.avai_out = 0;
ccmni->shared_mem->rx_control.avai_in = CCMNI_CTRL_Q_RX_SIZE_DEFAULT - 1;
ccmni->shared_mem->rx_control.q_length = CCMNI_CTRL_Q_RX_SIZE;
memset(ccmni->shared_mem->q_rx_ringbuff, 0, ccmni->shared_mem->rx_control.q_length * sizeof(q_ringbuf_ccmni_t));
ccmni_v2_dl_base_req(md_id, &ccmni_rx_base_virt, &ccmni_rx_base_phy);
if (ccmni_rx_base_virt == NULL || ccmni_rx_base_phy == NULL)
{
CCCI_MSG_INF(md_id, "net", "CCMNI%d allocate memory fail\n", ccmni->channel);
unregister_netdev(dev);
ret = -ENOMEM;
goto _ccmni_create_instance_exit;
}
switch(ccmni->channel)
{
case 0:
uart_rx = CCCI_CCMNI1_RX;
uart_rx_ack = CCCI_CCMNI1_RX_ACK;
uart_tx = CCCI_CCMNI1_TX;
uart_tx_ack = CCCI_CCMNI1_TX_ACK;
break;
case 1:
uart_rx = CCCI_CCMNI2_RX;
uart_rx_ack = CCCI_CCMNI2_RX_ACK;
uart_tx = CCCI_CCMNI2_TX;
uart_tx_ack = CCCI_CCMNI2_TX_ACK;
break;
case 2:
uart_rx = CCCI_CCMNI3_RX;
uart_rx_ack = CCCI_CCMNI3_RX_ACK;
uart_tx = CCCI_CCMNI3_TX;
uart_tx_ack = CCCI_CCMNI3_TX_ACK;
break;
default:
CCCI_MSG_INF(md_id, "net", "CCMNI%d, Invalid ccmni number\n", ccmni->channel);
unregister_netdev(dev);
ret = -ENOSYS;
goto _ccmni_create_instance_exit;
}
ccmni->m_md_id = md_id;
//Each channel has 100 RX buffers default
for (count = 0; count < CCMNI_CTRL_Q_RX_SIZE_DEFAULT; count++)
{
ccmni->shared_mem->q_rx_ringbuff[count].ptr = \
(CCMNI_CTRL_Q_RX_SIZE_DEFAULT * ccmni->channel + count ) * CCMNI_SINGLE_BUFF_SIZE + \
(unsigned char *)ccmni_rx_base_phy + CCMNI_BUFF_HEADER_SIZE + CCMNI_BUFF_DBG_INFO_SIZE;
ptr_virt = ccmni_v2_phys_to_virt(md_id, (unsigned char *)(ccmni->shared_mem->q_rx_ringbuff[count].ptr));
//buffer header and footer init
//Assume int to be 32bit. May need further modifying!!!!!
*((int*)(ptr_virt - CCMNI_BUFF_HEADER_SIZE)) = CCMNI_BUFF_HEADER;
*((int*)(ptr_virt + CCMNI_BUFF_DATA_FIELD_SIZE)) = CCMNI_BUFF_FOOTER;
#if CCMNI_DBG_INFO
//debug info
dbg_info = (dbg_info_ccmni_t *)(ptr_virt - CCMNI_BUFF_HEADER_SIZE - CCMNI_BUFF_DBG_INFO_SIZE);
dbg_info->port = ccmni->channel;
dbg_info->avai_in_no = count;
#endif
}
ccmni->uart_rx = uart_rx;
ccmni->uart_rx_ack = uart_rx_ack;
ccmni->uart_tx = uart_tx;
ccmni->uart_tx_ack = uart_tx_ack;
// Register this ccmni instance to the ccci driver.
// pass it the notification handler.
ASSERT(register_to_logic_ch(md_id, uart_rx, ccmni_v2_callback, (void *) ccmni) == 0);
ASSERT(register_to_logic_ch(md_id, uart_tx_ack, ccmni_v2_callback, (void *) ccmni) == 0);
// Initialize the spinlock.
spin_lock_init(&ccmni->spinlock);
setup_timer(&ccmni->timer, timer_func, (unsigned long)ccmni);
// Initialize the tasklet.
tasklet_init(&ccmni->tasklet, ccmni_v2_read, (unsigned long)ccmni);
ctl_b->ccmni_v2_instance[channel] = ccmni;
ccmni->ready = 1;
ccmni->net_if_off = 0;
return ret;
_ccmni_create_instance_exit:
free_netdev(dev);
return ret;
}
// The function start_xmit is called when there is one packet to transmit.
static int ccmni_v2_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
int ret = NETDEV_TX_OK;
int result = 0;
int read_out, avai_in, avai_out, q_length, q_idx;
#if CCMNI_DBG_INFO
dbg_info_ccmni_t *dbg_info;
#endif
unsigned char *ccmni_ptr;
ccmni_v2_instance_t *ccmni = netdev_priv(dev);
ccmni_v2_ctl_block_t *ctl_b = (ccmni_v2_ctl_block_t *)(ccmni->owner);
int md_id = ctl_b->m_md_id;
ccci_msg_t msg;
spin_lock_bh(&ccmni->spinlock);
if (ctl_b->ccci_is_ready==0)
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d transfer data fail when modem not ready \n", ccmni->channel);
ret = NETDEV_TX_BUSY;
goto _ccmni_start_xmit_busy;
}
read_out = ccmni->shared_mem->tx_control.read_out;
avai_in = ccmni->shared_mem->tx_control.avai_in;
avai_out = ccmni->shared_mem->tx_control.avai_out;
q_length = ccmni->shared_mem->tx_control.q_length;
if ((read_out < 0) || (avai_out < 0) || (avai_in < 0) || (q_length < 0))
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: avai_out=%d, read_out=%d, avai_in=%d, q_length=%d\n", \
ccmni->channel, avai_out, read_out, avai_in, q_length);
goto _ccmni_start_xmit_busy;
}
if ((read_out >= q_length) || (avai_out >= q_length) || (avai_in >= q_length))
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: avai_out=%d, read_out=%d, avai_in=%d, q_length=%d\n", \
ccmni->channel, avai_out, read_out, avai_in, q_length);
goto _ccmni_start_xmit_busy;
}
//Choose Q index
q_idx = avai_out;
ccmni_ptr = ccmni->shared_mem->q_tx_ringbuff[q_idx].ptr;
//check if too many data waiting to be read out or Q not initialized yet
//ccmni_ptr=NULL when not initialized???? haow.wang
if ((q_idx == avai_in) || (ccmni_ptr == NULL) )
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d TX busy and stop queue: q_idx=%d, skb->len=%d \n", \
ccmni->channel, q_idx, skb->len);
CCCI_DBG_MSG(md_id, "net", " TX read_out = %d avai_out = %d avai_in = %d\n", \
ccmni->shared_mem->tx_control.read_out, ccmni->shared_mem->tx_control.avai_out, ccmni->shared_mem->tx_control.avai_in);
CCCI_DBG_MSG(md_id, "net", " RX read_out = %d avai_out = %d avai_in = %d\n", \
ccmni->shared_mem->rx_control.read_out, ccmni->shared_mem->rx_control.avai_out, ccmni->shared_mem->rx_control.avai_in);
netif_stop_queue(ccmni->dev);
//Set CCMNI ready to ZERO, and wait for the ACK from modem side.
ccmni->ready = 0;
ret = NETDEV_TX_BUSY;
goto _ccmni_start_xmit_busy;
}
ccmni_ptr = ccmni_v2_phys_to_virt(md_id, (unsigned char *)(ccmni->shared_mem->q_tx_ringbuff[q_idx].ptr));
CCCI_CCMNI_MSG(md_id, "CCMNI%d_start_xmit: skb_len=%d, ccmni_ready=%d \n", \
ccmni->channel, skb->len, ccmni->ready);
if (skb->len > CCMNI_MTU)
{
//Sanity check; this should not happen!
//Digest and return OK.
CCCI_DBG_MSG(md_id, "net", "CCMNI%d packet size exceed 1500 bytes: size=%d \n", \
ccmni->channel, skb->len);
dev->stats.tx_dropped++;
goto _ccmni_start_xmit_exit;
}
#if CCMNI_DBG_INFO
//DBG info
dbg_info = (dbg_info_ccmni_t *)(ccmni_ptr - CCMNI_BUFF_HEADER_SIZE - CCMNI_BUFF_DBG_INFO_SIZE);
dbg_info->avai_out_no = q_idx;
#endif
memcpy(ccmni_ptr, skb->data, skb->len);
ccmni->shared_mem->q_tx_ringbuff[q_idx].len = skb->len;
//End byte
*(unsigned char*)(ccmni_ptr + skb->len) = CCMNI_DATA_END;
mb();
//Update avail_out after data buffer filled
q_idx++;
ccmni->shared_mem->tx_control.avai_out = (q_idx & (q_length - 1));
mb();
msg.addr = 0;
msg.len = skb->len;
msg.channel = ccmni->uart_tx;
msg.reserved = 0;
result = ccci_message_send(md_id, &msg, 1);
if (result==-CCCI_ERR_CCIF_NO_PHYSICAL_CHANNEL)
{
set_bit(CCMNI_SEND_PENDING,&ccmni->flags);
ccmni->send_len +=skb->len;
mod_timer(&ccmni->timer,jiffies);
}
else if (result==sizeof(ccci_msg_t))
clear_bit(CCMNI_SEND_PENDING,&ccmni->flags);
dev->stats.tx_packets++;
dev->stats.tx_bytes += skb->len;
_ccmni_start_xmit_exit:
dev_kfree_skb(skb);
_ccmni_start_xmit_busy:
spin_unlock_bh(&ccmni->spinlock);
return ret;
}
static void ccmni_v2_read(unsigned long arg)
{
int ret;
int read_out, avai_out, avai_in, q_length;
int packet_cnt, packet_cnt_save, consumed;
int rx_buf_res_left_cnt;
#if CCMNI_DBG_INFO
dbg_info_ccmni_t *dbg_info;
#endif
ccmni_v2_instance_t *ccmni = (ccmni_v2_instance_t *) arg;
unsigned char *ccmni_ptr;
unsigned int ccmni_len, q_idx;
ccmni_v2_ctl_block_t *ctl_b = (ccmni_v2_ctl_block_t*)ccmni->owner;
int md_id = ctl_b->m_md_id;
ccci_msg_t msg;
if (ccmni == NULL)
{
CCCI_DBG_MSG(md_id, "net", "[Error]CCMNI%d_read: invalid private data\n", ccmni->channel);
return;
}
spin_lock_bh(&ccmni->spinlock);
if (ctl_b->ccci_is_ready==0)
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail when modem not ready\n", ccmni->channel);
goto out;
}
read_out = ccmni->shared_mem->rx_control.read_out;
avai_out = ccmni->shared_mem->rx_control.avai_out;
avai_in = ccmni->shared_mem->rx_control.avai_in;
q_length = ccmni->shared_mem->rx_control.q_length;
if ((read_out < 0) || (avai_out < 0) || (avai_in < 0) || (q_length < 0))
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: avai_out=%d, read_out=%d, avai_in=%d, q_length=%d\n", \
ccmni->channel, avai_out, read_out, avai_in, q_length);
goto out;
}
if ((read_out >= q_length) || (avai_out >= q_length) || (avai_in >= q_length))
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: avai_out=%d, read_out=%d, avai_in=%d, q_length=%d\n", \
ccmni->channel, avai_out, read_out, avai_in, q_length);
goto out;
}
//Number of packets waiting to be processed
packet_cnt = avai_out >= read_out ? (avai_out - read_out) : (avai_out - read_out + q_length);
packet_cnt_save = packet_cnt;
rx_buf_res_left_cnt = avai_in >= avai_out ? (avai_in - avai_out) : (avai_in - avai_out + q_length);
if (packet_cnt <= 0)
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: nothing to read, avai_out=%d, read_out=%d, q_length=%d\n", \
ccmni->channel, avai_out, read_out, q_length);
goto out;
}
q_idx = read_out;
CCCI_CCMNI_MSG(md_id, "CCMNI%d_receive[Before]: avai_out=%d, read_out=%d, avai_in=%d, packet_cnt=%d\n", \
ccmni->channel, avai_out, read_out, avai_in, packet_cnt);
consumed = 0;
for (; packet_cnt > 0; packet_cnt--)
{
q_idx &= q_length - 1;
ccmni_ptr = ccmni_v2_phys_to_virt(md_id, (unsigned char *)(ccmni->shared_mem->q_rx_ringbuff[q_idx].ptr));
ccmni_len = ccmni->shared_mem->q_rx_ringbuff[q_idx].len;
#if CCMNI_DBG_INFO
//DBG info
dbg_info = (dbg_info_ccmni_t *)(ccmni_ptr - CCMNI_BUFF_HEADER_SIZE - CCMNI_BUFF_DBG_INFO_SIZE);
#endif
if (-CCCI_ERR_MEM_CHECK_FAIL == ccmni_v2_check_info(md_id, ccmni->channel, ccmni_ptr, ccmni_len))
{
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read: check info error, read_out=%d\n", ccmni->channel, read_out);
#if CCMNI_DBG_INFO
//dbg_info->port = ccmni->channel;
dbg_info->avai_in_no = q_idx;
//dbg_info->avai_out_no = q_idx;
dbg_info->read_out_no = q_idx;
#endif
avai_in++;
avai_in &= q_length - 1;
ccmni->shared_mem->q_rx_ringbuff[avai_in].ptr = ccmni->shared_mem->q_rx_ringbuff[q_idx].ptr;
ccmni_ptr = ccmni_v2_phys_to_virt(md_id, (unsigned char *)(ccmni->shared_mem->q_rx_ringbuff[avai_in].ptr));
#if CCMNI_DBG_INFO
dbg_info = (dbg_info_ccmni_t *)(ccmni_ptr - CCMNI_BUFF_HEADER_SIZE - CCMNI_BUFF_DBG_INFO_SIZE);
dbg_info->avai_in_no = avai_in;
#endif
q_idx++;
consumed++;
continue;
}
ret = ccmni_v2_receive(ccmni, ccmni_ptr, ccmni_len);
if(0 == ret)
{
#if CCMNI_DBG_INFO
//dbg_info->port = ccmni->channel;
dbg_info->avai_in_no = q_idx;
//dbg_info->avai_out_no = q_idx;
dbg_info->read_out_no = q_idx;
#endif
avai_in++;
avai_in &= q_length - 1;
ccmni->shared_mem->q_rx_ringbuff[avai_in].ptr = ccmni->shared_mem->q_rx_ringbuff[q_idx].ptr;
ccmni_ptr = ccmni_v2_phys_to_virt(md_id, (unsigned char *)(ccmni->shared_mem->q_rx_ringbuff[avai_in].ptr));
#if CCMNI_DBG_INFO
dbg_info = (dbg_info_ccmni_t *)(ccmni_ptr - CCMNI_BUFF_HEADER_SIZE - CCMNI_BUFF_DBG_INFO_SIZE);
dbg_info->avai_in_no = avai_in;
#endif
q_idx++;
consumed++;
} else if (-CCCI_ERR_MEM_CHECK_FAIL == ret) {
//If dev_alloc_skb() failed, retry right now may still fail. So setup timer, and retry later.
set_bit(CCMNI_RECV_PENDING,&ccmni->flags);
//avai_in++;
//avai_in &= q_length - 1;
//ccmni->shared_mem->q_rx_ringbuff[avai_in].ptr = ccmni->shared_mem->q_rx_ringbuff[q_idx].ptr;
//ccmni->dev->stats.rx_dropped++;
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read: no sk_buff, retrying, read_out=%d, avai_out=%d\n", \
ccmni->channel, q_idx, avai_out);
mod_timer(&ccmni->timer,jiffies + msecs_to_jiffies(10)); //10 ms???
break;
//q_idx++;
//consumed++;
}
}
read_out = (q_idx & (q_length - 1));
CCCI_CCMNI_MSG(md_id, "CCMNI%d_receive[After]: consumed=%d\n", ccmni->channel, consumed);
if (consumed > packet_cnt_save)
{
//Sanity check. This should not happen!
CCCI_DBG_MSG(md_id, "net", "CCMNI%d_read fail: consumed more than packet_cnt, consumed = %d, packet_cnt = %d\n", \
ccmni->channel, consumed, packet_cnt_save);
//Should ignore all data in buffer??? haow.wang
ccmni->shared_mem->rx_control.read_out = avai_out;
ccmni->shared_mem->rx_control.avai_in = avai_in;
goto out;
}
ccmni->shared_mem->rx_control.read_out = read_out;
ccmni->shared_mem->rx_control.avai_in = avai_in;
CCCI_CCMNI_MSG(md_id, "CCMNI%d_read to write mailbox(ch%d, tty%d)\n", ccmni->channel,
ccmni->uart_rx_ack, CCMNI_CHANNEL_OFFSET + ccmni->channel);
msg.magic = 0xFFFFFFFF;
msg.id = CCMNI_CHANNEL_OFFSET + ccmni->channel;
msg.channel = ccmni->uart_rx_ack;
msg.reserved = 0;
ret = ccci_message_send(md_id, &msg, 1);
if (ret==-CCCI_ERR_CCIF_NO_PHYSICAL_CHANNEL) {
set_bit(CCMNI_RECV_ACK_PENDING,&ccmni->flags);
mod_timer(&ccmni->timer,jiffies);
} else if (ret==sizeof(ccci_msg_t))
clear_bit(CCMNI_RECV_ACK_PENDING,&ccmni->flags);
out:
spin_unlock_bh(&ccmni->spinlock);
CCCI_CCMNI_MSG(md_id, "CCMNI%d_read invoke wake_lock_timeout(1s)\n", ccmni->channel);
wake_lock_timeout(&ctl_b->ccmni_wake_lock, HZ);
return;
}