diff options
Diffstat (limited to 'drivers/staging/wilc1000/wilc_wfi_netdevice.c')
| -rw-r--r-- | drivers/staging/wilc1000/wilc_wfi_netdevice.c | 951 |
1 files changed, 951 insertions, 0 deletions
diff --git a/drivers/staging/wilc1000/wilc_wfi_netdevice.c b/drivers/staging/wilc1000/wilc_wfi_netdevice.c new file mode 100644 index 000000000000..ab66ce4bd790 --- /dev/null +++ b/drivers/staging/wilc1000/wilc_wfi_netdevice.c @@ -0,0 +1,951 @@ +/*! + * @file wilc_wfi_netdevice.c + * @brief File Operations OS wrapper functionality + * @author mdaftedar + * @sa wilc_wfi_netdevice.h + * @date 01 MAR 2012 + * @version 1.0 + */ + +#ifdef SIMULATION + +#include "wilc_wfi_cfgoperations.h" +#include "host_interface.h" + + +MODULE_AUTHOR("Mai Daftedar"); +MODULE_LICENSE("Dual BSD/GPL"); + + +struct net_device *WILC_WFI_devs[2]; + +/* + * Transmitter lockup simulation, normally disabled. + */ +static int lockup; +module_param(lockup, int, 0); + +static int timeout = WILC_WFI_TIMEOUT; +module_param(timeout, int, 0); + +/* + * Do we run in NAPI mode? + */ +static int use_napi ; +module_param(use_napi, int, 0); + + +/* + * A structure representing an in-flight packet. + */ +struct WILC_WFI_packet { + struct WILC_WFI_packet *next; + struct net_device *dev; + int datalen; + u8 data[ETH_DATA_LEN]; +}; + + + +int pool_size = 8; +module_param(pool_size, int, 0); + + +static void WILC_WFI_TxTimeout(struct net_device *dev); +static void (*WILC_WFI_Interrupt)(int, void *, struct pt_regs *); + +/** + * @brief WILC_WFI_SetupPool + * @details Set up a device's packet pool. + * @param[in] struct net_device *dev : Network Device Pointer + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_SetupPool(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + int i; + struct WILC_WFI_packet *pkt; + + priv->ppool = NULL; + for (i = 0; i < pool_size; i++) { + pkt = kmalloc (sizeof (struct WILC_WFI_packet), GFP_KERNEL); + if (pkt == NULL) { + PRINT_D(RX_DBG, "Ran out of memory allocating packet pool\n"); + return; + } + pkt->dev = dev; + pkt->next = priv->ppool; + priv->ppool = pkt; + } +} + +/** + * @brief WILC_WFI_TearDownPool + * @details Internal cleanup function that's called after the network device + * driver is unregistered + * @param[in] struct net_device *dev : Network Device Driver + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_TearDownPool(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + struct WILC_WFI_packet *pkt; + + while ((pkt = priv->ppool)) { + priv->ppool = pkt->next; + kfree (pkt); + /* FIXME - in-flight packets ? */ + } +} + +/** + * @brief WILC_WFI_GetTxBuffer + * @details Buffer/pool management + * @param[in] net_device *dev : Network Device Driver Structure + * @return struct WILC_WFI_packet + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +struct WILC_WFI_packet *WILC_WFI_GetTxBuffer(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + unsigned long flags; + struct WILC_WFI_packet *pkt; + + spin_lock_irqsave(&priv->lock, flags); + pkt = priv->ppool; + priv->ppool = pkt->next; + if (priv->ppool == NULL) { + PRINT_INFO(RX_DBG, "Pool empty\n"); + netif_stop_queue(dev); + } + spin_unlock_irqrestore(&priv->lock, flags); + return pkt; +} +/** + * @brief WILC_WFI_ReleaseBuffer + * @details Buffer/pool management + * @param[in] WILC_WFI_packet *pkt : Structure holding in-flight packet + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_ReleaseBuffer(struct WILC_WFI_packet *pkt) +{ + unsigned long flags; + struct WILC_WFI_priv *priv = netdev_priv(pkt->dev); + + spin_lock_irqsave(&priv->lock, flags); + pkt->next = priv->ppool; + priv->ppool = pkt; + spin_unlock_irqrestore(&priv->lock, flags); + if (netif_queue_stopped(pkt->dev) && pkt->next == NULL) + netif_wake_queue(pkt->dev); +} + +/** + * @brief WILC_WFI_EnqueueBuf + * @details Enqueuing packets in an RX buffer queue + * @param[in] WILC_WFI_packet *pkt : Structure holding in-flight packet + * @param[in] net_device *dev : Network Device Driver Structure + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_EnqueueBuf(struct net_device *dev, struct WILC_WFI_packet *pkt) +{ + unsigned long flags; + struct WILC_WFI_priv *priv = netdev_priv(dev); + + spin_lock_irqsave(&priv->lock, flags); + pkt->next = priv->rx_queue; /* FIXME - misorders packets */ + priv->rx_queue = pkt; + spin_unlock_irqrestore(&priv->lock, flags); +} + +/** + * @brief WILC_WFI_DequeueBuf + * @details Dequeuing packets from the RX buffer queue + * @param[in] net_device *dev : Network Device Driver Structure + * @return WILC_WFI_packet *pkt : Structure holding in-flight pac + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +struct WILC_WFI_packet *WILC_WFI_DequeueBuf(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + struct WILC_WFI_packet *pkt; + unsigned long flags; + + spin_lock_irqsave(&priv->lock, flags); + pkt = priv->rx_queue; + if (pkt != NULL) + priv->rx_queue = pkt->next; + spin_unlock_irqrestore(&priv->lock, flags); + return pkt; +} +/** + * @brief WILC_WFI_RxInts + * @details Enable and disable receive interrupts. + * @param[in] net_device *dev : Network Device Driver Structure + * @param[in] enable : Enable/Disable flag + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +static void WILC_WFI_RxInts(struct net_device *dev, int enable) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + priv->rx_int_enabled = enable; +} + +/** + * @brief WILC_WFI_Open + * @details Open Network Device Driver, called when the network + * interface is opened. It starts the interface's transmit queue. + * @param[in] net_device *dev : Network Device Driver Structure + * @param[in] enable : Enable/Disable flag + * @return int : Returns 0 upon success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Open(struct net_device *dev) +{ + /* request_region(), request_irq(), .... (like fops->open) */ + /* + * Assign the hardware address of the board: use "\0SNULx", where + * x is 0 or 1. The first byte is '\0' to avoid being a multicast + * address (the first byte of multicast addrs is odd). + */ + memcpy(dev->dev_addr, "\0WLAN0", ETH_ALEN); + if (dev == WILC_WFI_devs[1]) + dev->dev_addr[ETH_ALEN - 1]++; /* \0SNUL1 */ + + WILC_WFI_InitHostInt(dev); + netif_start_queue(dev); + return 0; +} +/** + * @brief WILC_WFI_Release + * @details Release Network Device Driver, called when the network + * interface is stopped or brought down. This function marks + * the network driver as not being able to transmit + * @param[in] net_device *dev : Network Device Driver Structure + * @return int : Return 0 on Success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Release(struct net_device *dev) +{ + /* release ports, irq and such -- like fops->close */ + + netif_stop_queue(dev); /* can't transmit any more */ + + return 0; +} +/** + * @brief WILC_WFI_Config + * @details Configuration changes (passed on by ifconfig) + * @param[in] net_device *dev : Network Device Driver Structure + * @param[in] struct ifmap *map : Contains the ioctl implementation for the + * network driver. + * @return int : Return 0 on Success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Config(struct net_device *dev, struct ifmap *map) +{ + if (dev->flags & IFF_UP) /* can't act on a running interface */ + return -EBUSY; + + /* Don't allow changing the I/O address */ + if (map->base_addr != dev->base_addr) { + PRINT_D(RX_DBG, KERN_WARNING "WILC_WFI: Can't change I/O address\n"); + return -EOPNOTSUPP; + } + + /* Allow changing the IRQ */ + if (map->irq != dev->irq) { + dev->irq = map->irq; + /* request_irq() is delayed to open-time */ + } + + /* ignore other fields */ + return 0; +} +/** + * @brief WILC_WFI_Rx + * @details Receive a packet: retrieve, encapsulate and pass over to upper + * levels + * @param[in] net_device *dev : Network Device Driver Structure + * @param[in] WILC_WFI_packet : + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_Rx(struct net_device *dev, struct WILC_WFI_packet *pkt) +{ + int i; + struct sk_buff *skb; + struct WILC_WFI_priv *priv = netdev_priv(dev); + s8 rssi; + /* + * The packet has been retrieved from the transmission + * medium. Build an skb around it, so upper layers can handle it + */ + + + skb = dev_alloc_skb(pkt->datalen + 2); + if (!skb) { + if (printk_ratelimit()) + PRINT_D(RX_DBG, "WILC_WFI rx: low on mem - packet dropped\n"); + priv->stats.rx_dropped++; + goto out; + } + skb_reserve(skb, 2); /* align IP on 16B boundary */ + memcpy(skb_put(skb, pkt->datalen), pkt->data, pkt->datalen); + + if (priv->monitor_flag) { + PRINT_INFO(RX_DBG, "In monitor device name %s\n", dev->name); + priv = wiphy_priv(priv->dev->ieee80211_ptr->wiphy); + PRINT_D(RX_DBG, "VALUE PASSED IN OF HRWD %p\n", priv->hWILCWFIDrv); + /* host_int_get_rssi(priv->hWILCWFIDrv, &(rssi)); */ + if (INFO) { + for (i = 14; i < skb->len; i++) + PRINT_INFO(RX_DBG, "RXdata[%d] %02x\n", i, skb->data[i]); + } + WILC_WFI_monitor_rx(dev, skb); + return; + } +out: + return; +} + +/** + * @brief WILC_WFI_Poll + * @details The poll implementation + * @param[in] struct napi_struct *napi : + * @param[in] int budget : + * @return int : Return 0 on Success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +static int WILC_WFI_Poll(struct napi_struct *napi, int budget) +{ + int npackets = 0; + struct sk_buff *skb; + struct WILC_WFI_priv *priv = container_of(napi, struct WILC_WFI_priv, napi); + struct net_device *dev = priv->dev; + struct WILC_WFI_packet *pkt; + + while (npackets < budget && priv->rx_queue) { + pkt = WILC_WFI_DequeueBuf(dev); + skb = dev_alloc_skb(pkt->datalen + 2); + if (!skb) { + if (printk_ratelimit()) + PRINT_D(RX_DBG, "WILC_WFI: packet dropped\n"); + priv->stats.rx_dropped++; + WILC_WFI_ReleaseBuffer(pkt); + continue; + } + skb_reserve(skb, 2); /* align IP on 16B boundary */ + memcpy(skb_put(skb, pkt->datalen), pkt->data, pkt->datalen); + skb->dev = dev; + skb->protocol = eth_type_trans(skb, dev); + skb->ip_summed = CHECKSUM_UNNECESSARY; /* don't check it */ + netif_receive_skb(skb); + /* Maintain stats */ + npackets++; + WILC_WFI_update_stats(priv->dev->ieee80211_ptr->wiphy, pkt->datalen, WILC_WFI_RX_PKT); + WILC_WFI_ReleaseBuffer(pkt); + } + /* If we processed all packets, we're done; tell the kernel and re-enable ints */ + if (npackets < budget) { + napi_complete(napi); + WILC_WFI_RxInts(dev, 1); + } + return npackets; +} + +/** + * @brief WILC_WFI_Poll + * @details The typical interrupt entry point + * @param[in] struct napi_struct *napi : + * @param[in] int budget : + * @return int : Return 0 on Success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +static void WILC_WFI_RegularInterrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + int statusword; + struct WILC_WFI_priv *priv; + struct WILC_WFI_packet *pkt = NULL; + /* + * As usual, check the "device" pointer to be sure it is + * really interrupting. + * Then assign "struct device *dev" + */ + struct net_device *dev = (struct net_device *)dev_id; + /* ... and check with hw if it's really ours */ + + /* paranoid */ + if (!dev) + return; + + /* Lock the device */ + priv = netdev_priv(dev); + spin_lock(&priv->lock); + + /* retrieve statusword: real netdevices use I/O instructions */ + statusword = priv->status; + priv->status = 0; + if (statusword & WILC_WFI_RX_INTR) { + /* send it to WILC_WFI_rx for handling */ + pkt = priv->rx_queue; + if (pkt) { + priv->rx_queue = pkt->next; + WILC_WFI_Rx(dev, pkt); + } + } + if (statusword & WILC_WFI_TX_INTR) { + /* a transmission is over: free the skb */ + WILC_WFI_update_stats(priv->dev->ieee80211_ptr->wiphy, priv->tx_packetlen, WILC_WFI_TX_PKT); + dev_kfree_skb(priv->skb); + } + + /* Unlock the device and we are done */ + spin_unlock(&priv->lock); + if (pkt) + WILC_WFI_ReleaseBuffer(pkt); /* Do this outside the lock! */ + return; +} +/** + * @brief WILC_WFI_NapiInterrupt + * @details A NAPI interrupt handler + * @param[in] irq: + * @param[in] dev_id: + * @param[in] pt_regs: + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +static void WILC_WFI_NapiInterrupt(int irq, void *dev_id, struct pt_regs *regs) +{ + int statusword; + struct WILC_WFI_priv *priv; + + /* + * As usual, check the "device" pointer for shared handlers. + * Then assign "struct device *dev" + */ + struct net_device *dev = (struct net_device *)dev_id; + /* ... and check with hw if it's really ours */ + + /* paranoid */ + if (!dev) + return; + + /* Lock the device */ + priv = netdev_priv(dev); + spin_lock(&priv->lock); + + /* retrieve statusword: real netdevices use I/O instructions */ + statusword = priv->status; + priv->status = 0; + if (statusword & WILC_WFI_RX_INTR) { + WILC_WFI_RxInts(dev, 0); /* Disable further interrupts */ + napi_schedule(&priv->napi); + } + if (statusword & WILC_WFI_TX_INTR) { + /* a transmission is over: free the skb */ + + WILC_WFI_update_stats(priv->dev->ieee80211_ptr->wiphy, priv->tx_packetlen, WILC_WFI_TX_PKT); + dev_kfree_skb(priv->skb); + } + + /* Unlock the device and we are done */ + spin_unlock(&priv->lock); + return; +} + +/** + * @brief MI_WFI_HwTx + * @details Transmit a packet (low level interface) + * @param[in] buf: + * @param[in] len: + * @param[in] net_device *dev: + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_HwTx(char *buf, int len, struct net_device *dev) +{ + /* + * This function deals with hw details. This interface loops + * back the packet to the other WILC_WFI interface (if any). + * In other words, this function implements the WILC_WFI behaviour, + * while all other procedures are rather device-independent + */ + struct iphdr *ih; + struct net_device *dest; + struct WILC_WFI_priv *priv; + u32 *saddr, *daddr; + struct WILC_WFI_packet *tx_buffer; + + + /* I am paranoid. Ain't I? */ + if (len < sizeof(struct ethhdr) + sizeof(struct iphdr)) { + PRINT_D(RX_DBG, "WILC_WFI: Hmm... packet too short (%i octets)\n", + len); + return; + } + + if (0) { /* enable this conditional to look at the data */ + int i; + PRINT_D(RX_DBG, "len is %i", len); + for (i = 14; i < len; i++) + PRINT_D(RX_DBG, "TXdata[%d] %02x\n", i, buf[i] & 0xff); + /* PRINT_D(RX_DBG, "\n"); */ + } + /* + * Ethhdr is 14 bytes, but the kernel arranges for iphdr + * to be aligned (i.e., ethhdr is unaligned) + */ + ih = (struct iphdr *)(buf + sizeof(struct ethhdr)); + saddr = &ih->saddr; + daddr = &ih->daddr; + + ((u8 *)saddr)[2] ^= 1; /* change the third octet (class C) */ + ((u8 *)daddr)[2] ^= 1; + + ih->check = 0; /* and rebuild the checksum (ip needs it) */ + ih->check = ip_fast_csum((unsigned char *)ih, ih->ihl); + + + if (dev == WILC_WFI_devs[0]) + PRINT_D(RX_DBG, "%08x:%05i --> %08x:%05i\n", + ntohl(ih->saddr), ntohs(((struct tcphdr *)(ih + 1))->source), + ntohl(ih->daddr), ntohs(((struct tcphdr *)(ih + 1))->dest)); + else + PRINT_D(RX_DBG, "%08x:%05i <-- %08x:%05i\n", + ntohl(ih->daddr), ntohs(((struct tcphdr *)(ih + 1))->dest), + ntohl(ih->saddr), ntohs(((struct tcphdr *)(ih + 1))->source)); + + /* + * Ok, now the packet is ready for transmission: first simulate a + * receive interrupt on the twin device, then a + * transmission-done on the transmitting device + */ + dest = WILC_WFI_devs[dev == WILC_WFI_devs[0] ? 1 : 0]; + priv = netdev_priv(dest); + + tx_buffer = WILC_WFI_GetTxBuffer(dev); + tx_buffer->datalen = len; + memcpy(tx_buffer->data, buf, len); + WILC_WFI_EnqueueBuf(dest, tx_buffer); + if (priv->rx_int_enabled) { + priv->status |= WILC_WFI_RX_INTR; + WILC_WFI_Interrupt(0, dest, NULL); + } + + priv = netdev_priv(dev); + priv->tx_packetlen = len; + priv->tx_packetdata = buf; + priv->status |= WILC_WFI_TX_INTR; + if (lockup && ((priv->stats.tx_packets + 1) % lockup) == 0) { + /* Simulate a dropped transmit interrupt */ + netif_stop_queue(dev); + PRINT_D(RX_DBG, "Simulate lockup at %ld, txp %ld\n", jiffies, + (unsigned long) priv->stats.tx_packets); + } else + WILC_WFI_Interrupt(0, dev, NULL); + +} + +/** + * @brief WILC_WFI_Tx + * @details Transmit a packet (called by the kernel) + * @param[in] sk_buff *skb: + * @param[in] net_device *dev: + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Tx(struct sk_buff *skb, struct net_device *dev) +{ + int len; + char *data, shortpkt[ETH_ZLEN]; + struct WILC_WFI_priv *priv = netdev_priv(dev); + + /* priv = wiphy_priv(priv->dev->ieee80211_ptr->wiphy); */ + + /* if(priv->monitor_flag) */ + /* mac80211_hwsim_monitor_rx(skb); */ + + + data = skb->data; + len = skb->len; + + if (len < ETH_ZLEN) { + memset(shortpkt, 0, ETH_ZLEN); + memcpy(shortpkt, skb->data, skb->len); + len = ETH_ZLEN; + data = shortpkt; + } + dev->trans_start = jiffies; /* save the timestamp */ + + /* Remember the skb, so we can free it at interrupt time */ + priv->skb = skb; + + /* actual deliver of data is device-specific, and not shown here */ + WILC_WFI_HwTx(data, len, dev); + + return 0; /* Our simple device can not fail */ +} + +/** + * @brief WILC_WFI_TxTimeout + * @details Deal with a transmit timeout. + * @param[in] net_device *dev: + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_TxTimeout(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + + PRINT_D(RX_DBG, "Transmit timeout at %ld, latency %ld\n", jiffies, + jiffies - dev->trans_start); + /* Simulate a transmission interrupt to get things moving */ + priv->status = WILC_WFI_TX_INTR; + WILC_WFI_Interrupt(0, dev, NULL); + priv->stats.tx_errors++; + netif_wake_queue(dev); + return; +} + +/** + * @brief WILC_WFI_Ioctl + * @details Ioctl commands + * @param[in] net_device *dev: + * @param[in] ifreq *rq + * @param[in] cmd: + * @return int : Return 0 on Success + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + PRINT_D(RX_DBG, "ioctl\n"); + return 0; +} + +/** + * @brief WILC_WFI_Stat + * @details Return statistics to the caller + * @param[in] net_device *dev: + * @return WILC_WFI_Stats : Return net_device_stats stucture with the + * network device driver private data contents. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +struct net_device_stats *WILC_WFI_Stats(struct net_device *dev) +{ + struct WILC_WFI_priv *priv = netdev_priv(dev); + return &priv->stats; +} + +/** + * @brief WILC_WFI_RebuildHeader + * @details This function is called to fill up an eth header, since arp is not + * available on the interface + * @param[in] sk_buff *skb: + * @return int : Return 0 on Success + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_RebuildHeader(struct sk_buff *skb) +{ + struct ethhdr *eth = (struct ethhdr *) skb->data; + struct net_device *dev = skb->dev; + + memcpy(eth->h_source, dev->dev_addr, dev->addr_len); + memcpy(eth->h_dest, dev->dev_addr, dev->addr_len); + eth->h_dest[ETH_ALEN - 1] ^= 0x01; /* dest is us xor 1 */ + return 0; +} +/** + * @brief WILC_WFI_RebuildHeader + * @details This function is called to fill up an eth header, since arp is not + * available on the interface + * @param[in] sk_buff *skb: + * @param[in] struct net_device *dev: + * @param[in] unsigned short type: + * @param[in] const void *saddr, + * @param[in] const void *daddr: + * @param[in] unsigned int len + * @return int : Return 0 on Success + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_Header(struct sk_buff *skb, struct net_device *dev, + unsigned short type, const void *daddr, const void *saddr, + unsigned int len) +{ + struct ethhdr *eth = (struct ethhdr *)skb_push(skb, ETH_HLEN); + + eth->h_proto = htons(type); + memcpy(eth->h_source, saddr ? saddr : dev->dev_addr, dev->addr_len); + memcpy(eth->h_dest, daddr ? daddr : dev->dev_addr, dev->addr_len); + eth->h_dest[ETH_ALEN - 1] ^= 0x01; /* dest is us xor 1 */ + return dev->hard_header_len; +} + +/** + * @brief WILC_WFI_ChangeMtu + * @details The "change_mtu" method is usually not needed. + * If you need it, it must be like this. + * @param[in] net_device *dev : Network Device Driver Structure + * @param[in] new_mtu : + * @return int : Returns 0 on Success. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_ChangeMtu(struct net_device *dev, int new_mtu) +{ + unsigned long flags; + struct WILC_WFI_priv *priv = netdev_priv(dev); + spinlock_t *lock = &priv->lock; + + /* check ranges */ + if ((new_mtu < 68) || (new_mtu > 1500)) + return -EINVAL; + /* + * Do anything you need, and the accept the value + */ + spin_lock_irqsave(lock, flags); + dev->mtu = new_mtu; + spin_unlock_irqrestore(lock, flags); + return 0; /* success */ +} + +static const struct header_ops WILC_WFI_header_ops = { + .create = WILC_WFI_Header, + .rebuild = WILC_WFI_RebuildHeader, + .cache = NULL, /* disable caching */ +}; + + +static const struct net_device_ops WILC_WFI_netdev_ops = { + .ndo_open = WILC_WFI_Open, + .ndo_stop = WILC_WFI_Release, + .ndo_set_config = WILC_WFI_Config, + .ndo_start_xmit = WILC_WFI_Tx, + .ndo_do_ioctl = WILC_WFI_Ioctl, + .ndo_get_stats = WILC_WFI_Stats, + .ndo_change_mtu = WILC_WFI_ChangeMtu, + .ndo_tx_timeout = WILC_WFI_TxTimeout, +}; + +/** + * @brief WILC_WFI_Init + * @details The init function (sometimes called probe). + * It is invoked by register_netdev() + * @param[in] net_device *dev: + * @return NONE + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +void WILC_WFI_Init(struct net_device *dev) +{ + struct WILC_WFI_priv *priv; + + + /* + * Then, assign other fields in dev, using ether_setup() and some + * hand assignments + */ + ether_setup(dev); /* assign some of the fields */ + /* 1- Allocate space */ + + dev->netdev_ops = &WILC_WFI_netdev_ops; + dev->header_ops = &WILC_WFI_header_ops; + dev->watchdog_timeo = timeout; + /* keep the default flags, just add NOARP */ + dev->flags |= IFF_NOARP; + dev->features |= NETIF_F_NO_CSUM; + /* + * Then, initialize the priv field. This encloses the statistics + * and a few private fields. + */ + priv = netdev_priv(dev); + memset(priv, 0, sizeof(struct WILC_WFI_priv)); + priv->dev = dev; + netif_napi_add(dev, &priv->napi, WILC_WFI_Poll, 2); + /* The last parameter above is the NAPI "weight". */ + spin_lock_init(&priv->lock); + WILC_WFI_RxInts(dev, 1); /* enable receive interrupts */ + WILC_WFI_SetupPool(dev); +} + +/** + * @brief WILC_WFI_Stat + * @details Return statistics to the caller + * @param[in] net_device *dev: + * @return WILC_WFI_Stats : Return net_device_stats stucture with the + * network device driver private data contents. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ + +void WILC_WFI_Cleanup(void) +{ + int i; + struct WILC_WFI_priv *priv[2]; + + /*if(hwsim_mon!=NULL) + * { + * PRINT_D(RX_DBG, "Freeing monitor interface\n"); + * unregister_netdev(hwsim_mon); + * free_netdev(hwsim_mon); + * }*/ + for (i = 0; i < 2; i++) { + priv[i] = netdev_priv(WILC_WFI_devs[i]); + + if (WILC_WFI_devs[i]) { + PRINT_D(RX_DBG, "Unregistering\n"); + unregister_netdev(WILC_WFI_devs[i]); + WILC_WFI_TearDownPool(WILC_WFI_devs[i]); + free_netdev(WILC_WFI_devs[i]); + PRINT_D(RX_DBG, "[NETDEV]Stopping interface\n"); + WILC_WFI_DeInitHostInt(WILC_WFI_devs[i]); + WILC_WFI_WiphyFree(WILC_WFI_devs[i]); + } + + } + /* unregister_netdev(hwsim_mon); */ + WILC_WFI_deinit_mon_interface(); + return; +} + + +void StartConfigSim(void); + + + + + + + +/** + * @brief WILC_WFI_Stat + * @details Return statistics to the caller + * @param[in] net_device *dev: + * @return WILC_WFI_Stats : Return net_device_stats stucture with the + * network device driver private data contents. + * @author mdaftedar + * @date 01 MAR 2012 + * @version 1.0 + */ +int WILC_WFI_InitModule(void) +{ + + int result, i, ret = -ENOMEM; + struct WILC_WFI_priv *priv[2], *netpriv; + struct wireless_dev *wdev; + WILC_WFI_Interrupt = use_napi ? WILC_WFI_NapiInterrupt : WILC_WFI_RegularInterrupt; + char buf[IFNAMSIZ]; + + for (i = 0; i < 2; i++) { + + /* Allocate the net devices */ + WILC_WFI_devs[i] = alloc_netdev(sizeof(struct WILC_WFI_priv), "wlan%d", + WILC_WFI_Init); + if (WILC_WFI_devs[i] == NULL) + goto out; + /* priv[i] = netdev_priv(WILC_WFI_devs[i]); */ + + wdev = WILC_WFI_WiphyRegister(WILC_WFI_devs[i]); + WILC_WFI_devs[i]->ieee80211_ptr = wdev; + netpriv = netdev_priv(WILC_WFI_devs[i]); + netpriv->dev->ieee80211_ptr = wdev; + netpriv->dev->ml_priv = netpriv; + wdev->netdev = netpriv->dev; + + /*Registering the net device*/ + result = register_netdev(WILC_WFI_devs[i]); + if (result) + PRINT_D(RX_DBG, "WILC_WFI: error %i registering device \"%s\"\n", + result, WILC_WFI_devs[i]->name); + else + ret = 0; + } + + + /*init atmel driver */ + priv[0] = netdev_priv(WILC_WFI_devs[0]); + priv[1] = netdev_priv(WILC_WFI_devs[1]); + + if (priv[1]->dev->ieee80211_ptr->wiphy->interface_modes && BIT(NL80211_IFTYPE_MONITOR)) { + /* snprintf(buf, IFNAMSIZ, "mon.%s", priv[1]->dev->name); */ + /* WILC_WFI_init_mon_interface(); */ + /* priv[1]->monitor_flag = 1; */ + + } + priv[0]->bCfgScanning = false; + priv[0]->u32RcvdChCount = 0; + + WILC_memset(priv[0]->au8AssociatedBss, 0xFF, ETH_ALEN); + + + /* ret = host_int_init(&priv[0]->hWILCWFIDrv); */ + /*copy handle to the other driver*/ + /* priv[1]->hWILCWFIDrv = priv[0]->hWILCWFIDrv; */ + if (ret) { + PRINT_ER("Error Init Driver\n"); + } + + +out: + if (ret) + WILC_WFI_Cleanup(); + return ret; + + +} + + +module_init(WILC_WFI_InitModule); +module_exit(WILC_WFI_Cleanup); + +#endif |