/* Initialize the file system structure from disk */
int
fs_init(mem_sblock_t sbp)
{
blocknum_t inode_bitmap_size;
blocknum_t block_bitmap_size;
blocknum_t i;
sbp->filesys_lock = semaphore_new(1);
if (NULL == sbp->filesys_lock) {
return -1;
}
fs_lock(sbp);
sblock_get(maindisk, sbp);
sblock_put(sbp);
if (sblock_isvalid(sbp) != 1) {
sblock_print(sbp);
kprintf("File system is not recognized. ");
kprintf("Recommend running './mkfs <blocks>'.\n");
return -2;
}
inode_bitmap_size = sbp->inode_bitmap_last - sbp->inode_bitmap_first + 1;
sbp->inode_bitmap = malloc(inode_bitmap_size * DISK_BLOCK_SIZE);
block_bitmap_size = sbp->block_bitmap_last - sbp->block_bitmap_first + 1;
sbp->block_bitmap = malloc(block_bitmap_size * DISK_BLOCK_SIZE);
if (NULL == sbp->block_bitmap || NULL == sbp->inode_bitmap) {
semaphore_V(sbp->filesys_lock);
return -1;
}
/* Get disk bitmap */
for (i = sbp->inode_bitmap_first; i <= sbp->inode_bitmap_last; ++i) {
bpull(i, (char*) sbp->inode_bitmap + (i - sbp->inode_bitmap_first)
* DISK_BLOCK_SIZE);
}
for (i = sbp->block_bitmap_first; i <= sbp->block_bitmap_last; ++i) {
bpull(i, (char*) sbp->block_bitmap + (i - sbp->block_bitmap_first)
* DISK_BLOCK_SIZE);
}
/* Count free inodes and free blocks */
mainsb->free_inodes = bitmap_count_zero(mainsb->inode_bitmap,
mainsb->total_inodes);
mainsb->free_blocks = bitmap_count_zero(mainsb->block_bitmap,
mainsb->disk_num_blocks);
fs_unlock(sbp);
return 0;
}
/*Transmit interface*/
static int sprdwl_start_xmit(struct sk_buff *skb, struct net_device *dev)
{
struct sprdwl_priv *priv = netdev_priv(dev);
struct sblock blk;
int ret;
u8 *addr = NULL;
#ifdef CONFIG_SPRDWL_FW_ZEROCOPY
if (priv->tx_free < TX_FLOW_LOW) {
dev_err(&dev->dev, "tx flow control full\n");
netif_stop_queue(dev);
priv->ndev->stats.tx_fifo_errors++;
return NETDEV_TX_BUSY;
}
#endif
/*Get a free sblock.*/
ret = sblock_get(WLAN_CP_ID, WLAN_SBLOCK_CH, &blk, 0);
if (ret) {
dev_err(&dev->dev, "Failed to get free sblock (%d)!\n", ret);
netif_stop_queue(dev);
priv->ndev->stats.tx_fifo_errors++;
return NETDEV_TX_BUSY;
}
if (blk.length < skb->len) {
dev_err(&dev->dev, "The size of sblock is so tiny!\n");
priv->ndev->stats.tx_fifo_errors++;
sblock_put(WLAN_CP_ID, WLAN_SBLOCK_CH, &blk);
dev_kfree_skb_any(skb);
priv->txrcnt = 0;
return NETDEV_TX_OK;
}
#ifdef CONFIG_SPRDWL_FW_ZEROCOPY
addr = blk.addr + SIPC_TRANS_OFFSET;
#else
addr = blk.addr;
#endif
priv->tx_free--;
if (priv->connect_status == SPRDWL_CONNECTED &&
priv->cipher_type == SPRDWL_CIPHER_WAPI &&
/* priv->key_len[GROUP][priv->key_index[GROUP]] != 0 &&*/
priv->key_len[PAIRWISE][priv->key_index[PAIRWISE]] != 0 &&
(*(u16 *)((u8 *)skb->data + ETH_PKT_TYPE_OFFSET) != 0xb488)) {
memcpy(((u8 *)addr), skb->data, ETHERNET_HDR_LEN);
blk.length = wlan_tx_wapi_encryption(priv,
skb->data,
(skb->len - ETHERNET_HDR_LEN),
((u8 *)addr + ETHERNET_HDR_LEN))
+ ETHERNET_HDR_LEN;
} else {
blk.length = skb->len;
memcpy(((u8 *)addr), skb->data, skb->len);
}
#ifdef DUMP_TRANSMIT_PACKET
print_hex_dump(KERN_DEBUG, "transmit packet: ", DUMP_PREFIX_OFFSET,
16, 1, skb->data, skb->len, 0);
#endif
ret = sblock_send(WLAN_CP_ID, WLAN_SBLOCK_CH, &blk);
if (ret) {
dev_err(&dev->dev, "Failed to send sblock (%d)!\n", ret);
sblock_put(WLAN_CP_ID, WLAN_SBLOCK_CH, &blk);
priv->tx_free++;
priv->ndev->stats.tx_fifo_errors++;
if (priv->txrcnt > SETH_RESEND_MAX_NUM)
netif_stop_queue(dev);
priv->txrcnt++;
return NETDEV_TX_BUSY;
}
/*Statistics*/
priv->ndev->stats.tx_bytes += skb->len;
priv->ndev->stats.tx_packets++;
dev->trans_start = jiffies;
priv->txrcnt = 0;
dev_kfree_skb_any(skb);
return NETDEV_TX_OK;
}