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1#include "headers.h"
2
3static int SearchVcid(struct bcm_mini_adapter *Adapter, unsigned short usVcid)
4{
5 int iIndex = 0;
6
7 for (iIndex = (NO_OF_QUEUES-1); iIndex >= 0; iIndex--)
8 if (Adapter->PackInfo[iIndex].usVCID_Value == usVcid)
9 return iIndex;
10 return NO_OF_QUEUES+1;
11
12}
13
14
15static struct bcm_usb_rcb *
16GetBulkInRcb(struct bcm_interface_adapter *psIntfAdapter)
17{
18 struct bcm_usb_rcb *pRcb = NULL;
19 UINT index = 0;
20
21 if ((atomic_read(&psIntfAdapter->uNumRcbUsed) < MAXIMUM_USB_RCB) &&
22 (psIntfAdapter->psAdapter->StopAllXaction == false)) {
23 index = atomic_read(&psIntfAdapter->uCurrRcb);
24 pRcb = &psIntfAdapter->asUsbRcb[index];
25 pRcb->bUsed = TRUE;
26 pRcb->psIntfAdapter = psIntfAdapter;
27 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Got Rx desc %d used %d",
28 index, atomic_read(&psIntfAdapter->uNumRcbUsed));
29 index = (index + 1) % MAXIMUM_USB_RCB;
30 atomic_set(&psIntfAdapter->uCurrRcb, index);
31 atomic_inc(&psIntfAdapter->uNumRcbUsed);
32 }
33 return pRcb;
34}
35
36/*this is receive call back - when pkt available for receive (BULK IN- end point)*/
37static void read_bulk_callback(struct urb *urb)
38{
39 struct sk_buff *skb = NULL;
40 bool bHeaderSupressionEnabled = false;
41 int QueueIndex = NO_OF_QUEUES + 1;
42 UINT uiIndex = 0;
43 int process_done = 1;
44 struct bcm_usb_rcb *pRcb = (struct bcm_usb_rcb *)urb->context;
45 struct bcm_interface_adapter *psIntfAdapter = pRcb->psIntfAdapter;
46 struct bcm_mini_adapter *Adapter = psIntfAdapter->psAdapter;
47 struct bcm_leader *pLeader = urb->transfer_buffer;
48
49 if (unlikely(netif_msg_rx_status(Adapter)))
50 pr_info(PFX "%s: rx urb status %d length %d\n",
51 Adapter->dev->name, urb->status, urb->actual_length);
52
53 if ((Adapter->device_removed == TRUE) ||
54 (TRUE == Adapter->bEndPointHalted) ||
55 (0 == urb->actual_length)) {
56 pRcb->bUsed = false;
57 atomic_dec(&psIntfAdapter->uNumRcbUsed);
58 return;
59 }
60
61 if (urb->status != STATUS_SUCCESS) {
62 if (urb->status == -EPIPE) {
63 Adapter->bEndPointHalted = TRUE;
64 wake_up(&Adapter->tx_packet_wait_queue);
65 } else {
66 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Rx URB has got cancelled. status :%d", urb->status);
67 }
68 pRcb->bUsed = false;
69 atomic_dec(&psIntfAdapter->uNumRcbUsed);
70 urb->status = STATUS_SUCCESS;
71 return;
72 }
73
74 if (Adapter->bDoSuspend && (Adapter->bPreparingForLowPowerMode)) {
75 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");
76 return;
77 }
78
79 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Read back done len %d\n", pLeader->PLength);
80 if (!pLeader->PLength) {
81 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "Leader Length 0");
82 atomic_dec(&psIntfAdapter->uNumRcbUsed);
83 return;
84 }
85 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);
86 if (MAX_CNTL_PKT_SIZE < pLeader->PLength) {
87 if (netif_msg_rx_err(Adapter))
88 pr_info(PFX "%s: corrupted leader length...%d\n",
89 Adapter->dev->name, pLeader->PLength);
90 ++Adapter->dev->stats.rx_dropped;
91 atomic_dec(&psIntfAdapter->uNumRcbUsed);
92 return;
93 }
94
95 QueueIndex = SearchVcid(Adapter, pLeader->Vcid);
96 if (QueueIndex < NO_OF_QUEUES) {
97 bHeaderSupressionEnabled =
98 Adapter->PackInfo[QueueIndex].bHeaderSuppressionEnabled;
99 bHeaderSupressionEnabled =
100 bHeaderSupressionEnabled & Adapter->bPHSEnabled;
101 }
102
103 skb = dev_alloc_skb(pLeader->PLength + SKB_RESERVE_PHS_BYTES + SKB_RESERVE_ETHERNET_HEADER);
104 if (!skb) {
105 BCM_DEBUG_PRINT(Adapter, DBG_TYPE_PRINTK, 0, 0, "NO SKBUFF!!! Dropping the Packet");
106 atomic_dec(&psIntfAdapter->uNumRcbUsed);
107 return;
108 }
109 /* If it is a control Packet, then call handle_bcm_packet ()*/
110 if ((ntohs(pLeader->Vcid) == VCID_CONTROL_PACKET) ||
111 (!(pLeader->Status >= 0x20 && pLeader->Status <= 0x3F))) {
112 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_CTRL, DBG_LVL_ALL, "Received control pkt...");
113 *(PUSHORT)skb->data = pLeader->Status;
114 memcpy(skb->data+sizeof(USHORT), urb->transfer_buffer +
115 (sizeof(struct bcm_leader)), pLeader->PLength);
116 skb->len = pLeader->PLength + sizeof(USHORT);
117
118 spin_lock(&Adapter->control_queue_lock);
119 ENQUEUEPACKET(Adapter->RxControlHead, Adapter->RxControlTail, skb);
120 spin_unlock(&Adapter->control_queue_lock);
121
122 atomic_inc(&Adapter->cntrlpktCnt);
123 wake_up(&Adapter->process_rx_cntrlpkt);
124 } else {
125 /*
126 * Data Packet, Format a proper Ethernet Header
127 * and give it to the stack
128 */
129 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "Received Data pkt...");
130 skb_reserve(skb, 2 + SKB_RESERVE_PHS_BYTES);
131 memcpy(skb->data+ETH_HLEN, (PUCHAR)urb->transfer_buffer + sizeof(struct bcm_leader), pLeader->PLength);
132 skb->dev = Adapter->dev;
133
134 /* currently skb->len has extra ETH_HLEN bytes in the beginning */
135 skb_put(skb, pLeader->PLength + ETH_HLEN);
136 Adapter->PackInfo[QueueIndex].uiTotalRxBytes += pLeader->PLength;
137 Adapter->PackInfo[QueueIndex].uiThisPeriodRxBytes += pLeader->PLength;
138 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "Received Data pkt of len :0x%X", pLeader->PLength);
139
140 if (netif_running(Adapter->dev)) {
141 /* Moving ahead by ETH_HLEN to the data ptr as received from FW */
142 skb_pull(skb, ETH_HLEN);
143 PHSReceive(Adapter, pLeader->Vcid, skb, &skb->len,
144 NULL, bHeaderSupressionEnabled);
145
146 if (!Adapter->PackInfo[QueueIndex].bEthCSSupport) {
147 skb_push(skb, ETH_HLEN);
148
149 memcpy(skb->data, skb->dev->dev_addr, 6);
150 memcpy(skb->data+6, skb->dev->dev_addr, 6);
151 (*(skb->data+11))++;
152 *(skb->data+12) = 0x08;
153 *(skb->data+13) = 0x00;
154 pLeader->PLength += ETH_HLEN;
155 }
156
157 skb->protocol = eth_type_trans(skb, Adapter->dev);
158 process_done = netif_rx(skb);
159 } else {
160 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DATA, DBG_LVL_ALL, "i/f not up hance freeing SKB...");
161 dev_kfree_skb(skb);
162 }
163
164 ++Adapter->dev->stats.rx_packets;
165 Adapter->dev->stats.rx_bytes += pLeader->PLength;
166
167 for (uiIndex = 0; uiIndex < MIBS_MAX_HIST_ENTRIES; uiIndex++) {
168 if ((pLeader->PLength <= MIBS_PKTSIZEHIST_RANGE*(uiIndex+1)) &&
169 (pLeader->PLength > MIBS_PKTSIZEHIST_RANGE*(uiIndex)))
170 Adapter->aRxPktSizeHist[uiIndex]++;
171 }
172 }
173 Adapter->PrevNumRecvDescs++;
174 pRcb->bUsed = false;
175 atomic_dec(&psIntfAdapter->uNumRcbUsed);
176}
177
178static int ReceiveRcb(struct bcm_interface_adapter *psIntfAdapter, struct bcm_usb_rcb *pRcb)
179{
180 struct urb *urb = pRcb->urb;
181 int retval = 0;
182
183 usb_fill_bulk_urb(urb, psIntfAdapter->udev, usb_rcvbulkpipe(psIntfAdapter->udev, psIntfAdapter->sBulkIn.bulk_in_endpointAddr),
184 urb->transfer_buffer, BCM_USB_MAX_READ_LENGTH, read_bulk_callback, pRcb);
185 if (false == psIntfAdapter->psAdapter->device_removed &&
186 false == psIntfAdapter->psAdapter->bEndPointHalted &&
187 false == psIntfAdapter->bSuspended &&
188 false == psIntfAdapter->bPreparingForBusSuspend) {
189 retval = usb_submit_urb(urb, GFP_ATOMIC);
190 if (retval) {
191 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_RX, RX_DPC, DBG_LVL_ALL, "failed submitting read urb, error %d", retval);
192 /* if this return value is because of pipe halt. need to clear this. */
193 if (retval == -EPIPE) {
194 psIntfAdapter->psAdapter->bEndPointHalted = TRUE;
195 wake_up(&psIntfAdapter->psAdapter->tx_packet_wait_queue);
196 }
197
198 }
199 }
200 return retval;
201}
202
203/*
204Function: InterfaceRx
205
206Description: This is the hardware specific Function for Receiving
207 data packet/control packets from the device.
208
209Input parameters: IN struct bcm_mini_adapter *Adapter - Miniport Adapter Context
210
211
212
213Return: TRUE - If Rx was successful.
214 Other - If an error occurred.
215*/
216
217bool InterfaceRx(struct bcm_interface_adapter *psIntfAdapter)
218{
219 USHORT RxDescCount = NUM_RX_DESC - atomic_read(&psIntfAdapter->uNumRcbUsed);
220 struct bcm_usb_rcb *pRcb = NULL;
221
222 while (RxDescCount) {
223 pRcb = GetBulkInRcb(psIntfAdapter);
224 if (pRcb == NULL) {
225 BCM_DEBUG_PRINT(psIntfAdapter->psAdapter, DBG_TYPE_PRINTK, 0, 0, "Unable to get Rcb pointer");
226 return false;
227 }
228 ReceiveRcb(psIntfAdapter, pRcb);
229 RxDescCount--;
230 }
231 return TRUE;
232}
233