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#include "headers.h"
static int SearchVcid(struct bcm_mini_adapter *Adapter, unsigned short usVcid)
{
int iIndex = 0;
for (iIndex = (NO_OF_QUEUES-1); iIndex >= 0; iIndex--)
if (Adapter->PackInfo[iIndex].usVCID_Value == usVcid)
return iIndex;
return NO_OF_QUEUES+1;
}
static struct bcm_usb_rcb *
GetBulkInRcb(struct bcm_interface_adapter *psIntfAdapter)
{
struct bcm_usb_rcb *pRcb = NULL;
UINT index = 0;
if ((atomic_read(&psIntfAdapter->uNumRcbUsed) < MAXIMUM_USB_RCB) &&
(psIntfAdapter->psAdapter->StopAllXaction == false)) {
index = atomic_read(&psIntfAdapter->uCurrRcb);
pRcb = &psIntfAdapter->asUsbRcb[index];
pRcb->bUsed = TRUE;
pRcb->psIntfAdapter = psIntfAdapter;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Got Rx desc %d used %d",
index, atomic_read(&psIntfAdapter->uNumRcbUsed));
index = (index + 1) % MAXIMUM_USB_RCB;
atomic_set(&psIntfAdapter->uCurrRcb, index);
atomic_inc(&psIntfAdapter->uNumRcbUsed);
}
return pRcb;
}
/*this is receive call back - when pkt available for receive (BULK IN- end point)*/
static void read_bulk_callback(struct urb *urb)
{
struct sk_buff *skb = NULL;
bool bHeaderSupressionEnabled = false;
int QueueIndex = NO_OF_QUEUES + 1;
UINT uiIndex = 0;
int process_done = 1;
struct bcm_usb_rcb *pRcb = (struct bcm_usb_rcb *)urb->context;
struct bcm_interface_adapter *psIntfAdapter = pRcb->psIntfAdapter;
struct bcm_mini_adapter *Adapter = psIntfAdapter->psAdapter;
struct bcm_leader *pLeader = urb->transfer_buffer;
if (unlikely(netif_msg_rx_status(Adapter)))
pr_info(PFX "%s: rx urb status %d length %d\n",
Adapter->dev->name, urb->status, urb->actual_length);
if ((Adapter->device_removed == TRUE) ||
(TRUE == Adapter->bEndPointHalted) ||
(0 == urb->actual_length)) {
pRcb->bUsed = false;
atomic_dec(&psIntfAdapter->uNumRcbUsed);
return;
}
if (urb->status != STATUS_SUCCESS) {
if (urb->status == -EPIPE) {
Adapter->bEndPointHalted = TRUE;
wake_up(&Adapter->tx_packet_wait_queue);
} else {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Rx URB has got cancelled. status :%d", urb->status);
}
pRcb->bUsed = false;
atomic_dec(&psIntfAdapter->uNumRcbUsed);
urb->status = STATUS_SUCCESS;
return;
}
if (Adapter->bDoSuspend && (Adapter->bPreparingForLowPowerMode)) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "device is going in low power mode while PMU option selected..hence rx packet should not be process");
return;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Read back done len %d\n", pLeader->PLength);
if (!pLeader->PLength) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Leader Length 0");
atomic_dec(&psIntfAdapter->uNumRcbUsed);
return;
}
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Leader Status:0x%hX, Length:0x%hX, VCID:0x%hX", pLeader->Status, pLeader->PLength, pLeader->Vcid);
if (MAX_CNTL_PKT_SIZE < pLeader->PLength) {
if (netif_msg_rx_err(Adapter))
pr_info(PFX "%s: corrupted leader length...%d\n",
Adapter->dev->name, pLeader->PLength);
++Adapter->dev->stats.rx_dropped;
atomic_dec(&psIntfAdapter->uNumRcbUsed);
return;
}
QueueIndex = SearchVcid(Adapter, pLeader->Vcid);
if (QueueIndex < NO_OF_QUEUES) {
bHeaderSupressionEnabled =
Adapter->PackInfo[QueueIndex].bHeaderSuppressionEnabled;
bHeaderSupressionEnabled =
bHeaderSupressionEnabled & Adapter->bPHSEnabled;
}
skb = dev_alloc_skb(pLeader->PLength + SKB_RESERVE_PHS_BYTES + SKB_RESERVE_ETHERNET_HEADER);
if (!skb) {
BCM_DEBUG_PRINT(Adapter, DBG_TYPE_PRINTK, 0, 0, "NO SKBUFF!!! Dropping the Packet");
atomic_dec(&psIntfAdapter->uNumRcbUsed);
return;
}
/* If it is a control Packet, then call handle_bcm_packet ()*/
if ((ntohs(pLeader->Vcid) == VCID_CONTROL_PACKET) ||
(!(pLeader->Status >= 0x20 && pLeader->Status <= 0x3F))) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_CTRL, DBG_LVL_ALL, "Received control pkt...");
*(PUSHORT)skb->data = pLeader->Status;
memcpy(skb->data+sizeof(USHORT), urb->transfer_buffer +
(sizeof(struct bcm_leader)), pLeader->PLength);
skb->len = pLeader->PLength + sizeof(USHORT);
spin_lock(&Adapter->control_queue_lock);
ENQUEUEPACKET(Adapter->RxControlHead, Adapter->RxControlTail, skb);
spin_unlock(&Adapter->control_queue_lock);
atomic_inc(&Adapter->cntrlpktCnt);
wake_up(&Adapter->process_rx_cntrlpkt);
} else {
/*
* Data Packet, Format a proper Ethernet Header
* and give it to the stack
*/
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "Received Data pkt...");
skb_reserve(skb, 2 + SKB_RESERVE_PHS_BYTES);
memcpy(skb->data+ETH_HLEN, (PUCHAR)urb->transfer_buffer + sizeof(struct bcm_leader), pLeader->PLength);
skb->dev = Adapter->dev;
/* currently skb->len has extra ETH_HLEN bytes in the beginning */
skb_put(skb, pLeader->PLength + ETH_HLEN);
Adapter->PackInfo[QueueIndex].uiTotalRxBytes += pLeader->PLength;
Adapter->PackInfo[QueueIndex].uiThisPeriodRxBytes += pLeader->PLength;
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "Received Data pkt of len :0x%X", pLeader->PLength);
if (netif_running(Adapter->dev)) {
/* Moving ahead by ETH_HLEN to the data ptr as received from FW */
skb_pull(skb, ETH_HLEN);
PHSReceive(Adapter, pLeader->Vcid, skb, &skb->len,
NULL, bHeaderSupressionEnabled);
if (!Adapter->PackInfo[QueueIndex].bEthCSSupport) {
skb_push(skb, ETH_HLEN);
memcpy(skb->data, skb->dev->dev_addr, 6);
memcpy(skb->data+6, skb->dev->dev_addr, 6);
(*(skb->data+11))++;
*(skb->data+12) = 0x08;
*(skb->data+13) = 0x00;
pLeader->PLength += ETH_HLEN;
}
skb->protocol = eth_type_trans(skb, Adapter->dev);
process_done = netif_rx(skb);
} else {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "i/f not up hance freeing SKB...");
dev_kfree_skb(skb);
}
++Adapter->dev->stats.rx_packets;
Adapter->dev->stats.rx_bytes += pLeader->PLength;
for (uiIndex = 0; uiIndex < MIBS_MAX_HIST_ENTRIES; uiIndex++) {
if ((pLeader->PLength <= MIBS_PKTSIZEHIST_RANGE*(uiIndex+1)) &&
(pLeader->PLength > MIBS_PKTSIZEHIST_RANGE*(uiIndex)))
Adapter->aRxPktSizeHist[uiIndex]++;
}
}
Adapter->PrevNumRecvDescs++;
pRcb->bUsed = false;
atomic_dec(&psIntfAdapter->uNumRcbUsed);
}
static int ReceiveRcb(struct bcm_interface_adapter *psIntfAdapter, struct bcm_usb_rcb *pRcb)
{
struct urb *urb = pRcb->urb;
int retval = 0;
usb_fill_bulk_urb(urb, psIntfAdapter->udev, usb_rcvbulkpipe(psIntfAdapter->udev, psIntfAdapter->sBulkIn.bulk_in_endpointAddr),
urb->transfer_buffer, BCM_USB_MAX_READ_LENGTH, read_bulk_callback, pRcb);
if (false == psIntfAdapter->psAdapter->device_removed &&
false == psIntfAdapter->psAdapter->bEndPointHalted &&
false == psIntfAdapter->bSuspended &&
false == psIntfAdapter->bPreparingForBusSuspend) {
retval = usb_submit_urb(urb, GFP_ATOMIC);
if (retval) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "failed submitting read urb, error %d", retval);
/* if this return value is because of pipe halt. need to clear this. */
if (retval == -EPIPE) {
psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
}
}
}
return retval;
}
/*
Function: InterfaceRx
Description: This is the hardware specific Function for Receiving
data packet/control packets from the device.
Input parameters: IN struct bcm_mini_adapter *Adapter - Miniport Adapter Context
Return: TRUE - If Rx was successful.
Other - If an error occurred.
*/
bool InterfaceRx(struct bcm_interface_adapter *psIntfAdapter)
{
USHORT RxDescCount = NUM_RX_DESC - atomic_read(&psIntfAdapter->uNumRcbUsed);
struct bcm_usb_rcb *pRcb = NULL;
while (RxDescCount) {
pRcb = GetBulkInRcb(psIntfAdapter);
if (pRcb == NULL) {
BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0, "Unable to get Rcb pointer");
return false;
}
ReceiveRcb(psIntfAdapter, pRcb);
RxDescCount--;
}
return TRUE;
}
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