Merge branch 'tracing/core' into tracing/hw-breakpoints

Conflicts:
	arch/Kconfig
	kernel/trace/trace.h

Merge reason: resolve the conflicts, plus adopt to the new
              ring-buffer APIs.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 261 insertions, 0 deletions

diff --git a/drivers/staging/vt6655/wctl.c b/drivers/staging/vt6655/wctl.c
new file mode 100644
index 00000000000..b4fecc2ed55
--- /dev/null
+++ b/drivers/staging/vt6655/wctl.c
@@ -0,0 +1,261 @@
+/*
+ * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * File: wctl.c
+ *
+ * Purpose: handle WMAC duplicate filter & defragment
+ *
+ * Author: Jerry Chen
+ *
+ * Date: Jun. 27, 2002
+ *
+ * Functions:
+ *      WCTLbIsDuplicate - Test if duplicate packet
+ *      WCTLuSearchDFCB - Search DeFragment Control Database
+ *      WCTLuInsertDFCB - Insert DeFragment Control Database
+ *      WCTLbHandleFragment - Handle received fragment packet
+ *
+ * Revision History:
+ *
+ */
+
+
+#if !defined(__WCTL_H__)
+#include "wctl.h"
+#endif
+#if !defined(__DEVICE_H__)
+#include "device.h"
+#endif
+#if !defined(__CARD_H__)
+#include "card.h"
+#endif
+
+/*---------------------  Static Definitions -------------------------*/
+
+/*---------------------  Static Classes  ----------------------------*/
+
+/*---------------------  Static Variables  --------------------------*/
+// static int          msglevel                =MSG_LEVEL_INFO;
+/*---------------------  Static Functions  --------------------------*/
+
+/*---------------------  Export Variables  --------------------------*/
+
+
+
+/*
+ * Description:
+ *      Scan Rx cache.  Return TRUE if packet is duplicate, else
+ *      inserts in receive cache and returns FALSE.
+ *
+ * Parameters:
+ *  In:
+ *      pCache      - Receive packets history
+ *      pMACHeader  - 802.11 MAC Header of received packet
+ *  Out:
+ *      none
+ *
+ * Return Value: TRUE if packet duplicate; otherwise FALSE
+ *
+ */
+
+BOOL WCTLbIsDuplicate (PSCache pCache, PS802_11Header pMACHeader)
+{
+    UINT            uIndex;
+    UINT            ii;
+    PSCacheEntry    pCacheEntry;
+
+    if (IS_FC_RETRY(pMACHeader)) {
+
+        uIndex = pCache->uInPtr;
+        for (ii = 0; ii < DUPLICATE_RX_CACHE_LENGTH; ii++) {
+            pCacheEntry = &(pCache->asCacheEntry[uIndex]);
+            if ((pCacheEntry->wFmSequence == pMACHeader->wSeqCtl) &&
+                (IS_ETH_ADDRESS_EQUAL (&(pCacheEntry->abyAddr2[0]), &(pMACHeader->abyAddr2[0])))
+                ) {
+                /* Duplicate match */
+                return TRUE;
+            }
+            ADD_ONE_WITH_WRAP_AROUND(uIndex, DUPLICATE_RX_CACHE_LENGTH);
+        }
+    }
+    /* Not fount in cache - insert */
+    pCacheEntry = &pCache->asCacheEntry[pCache->uInPtr];
+    pCacheEntry->wFmSequence = pMACHeader->wSeqCtl;
+    memcpy(&(pCacheEntry->abyAddr2[0]), &(pMACHeader->abyAddr2[0]), U_ETHER_ADDR_LEN);
+    ADD_ONE_WITH_WRAP_AROUND(pCache->uInPtr, DUPLICATE_RX_CACHE_LENGTH);
+    return FALSE;
+}
+
+/*
+ * Description:
+ *      Found if sequence number of received fragment packet in Defragment Database
+ *
+ * Parameters:
+ *  In:
+ *      pDevice     - Pointer to adapter
+ *      pMACHeader  - 802.11 MAC Header of received packet
+ *  Out:
+ *      none
+ *
+ * Return Value: index number in Defragment Database
+ *
+ */
+UINT WCTLuSearchDFCB (PSDevice pDevice, PS802_11Header pMACHeader)
+{
+UINT ii;
+
+    for(ii=0;ii<pDevice->cbDFCB;ii++) {
+        if ((pDevice->sRxDFCB[ii].bInUse == TRUE) &&
+            (IS_ETH_ADDRESS_EQUAL (&(pDevice->sRxDFCB[ii].abyAddr2[0]), &(pMACHeader->abyAddr2[0])))
+            ) {
+            //
+            return(ii);
+        }
+    }
+    return(pDevice->cbDFCB);
+}
+
+
+/*
+ * Description:
+ *      Insert received fragment packet in Defragment Database
+ *
+ * Parameters:
+ *  In:
+ *      pDevice     - Pointer to adapter
+ *      pMACHeader  - 802.11 MAC Header of received packet
+ *  Out:
+ *      none
+ *
+ * Return Value: index number in Defragment Database
+ *
+ */
+UINT WCTLuInsertDFCB (PSDevice pDevice, PS802_11Header pMACHeader)
+{
+UINT ii;
+
+    if (pDevice->cbFreeDFCB == 0)
+        return(pDevice->cbDFCB);
+    for(ii=0;ii<pDevice->cbDFCB;ii++) {
+        if (pDevice->sRxDFCB[ii].bInUse == FALSE) {
+            pDevice->cbFreeDFCB--;
+            pDevice->sRxDFCB[ii].uLifetime = pDevice->dwMaxReceiveLifetime;
+            pDevice->sRxDFCB[ii].bInUse = TRUE;
+            pDevice->sRxDFCB[ii].wSequence = (pMACHeader->wSeqCtl >> 4);
+            pDevice->sRxDFCB[ii].wFragNum = (pMACHeader->wSeqCtl & 0x000F);
+            memcpy(&(pDevice->sRxDFCB[ii].abyAddr2[0]), &(pMACHeader->abyAddr2[0]), U_ETHER_ADDR_LEN);
+            return(ii);
+        }
+    }
+    return(pDevice->cbDFCB);
+}
+
+
+/*
+ * Description:
+ *      Handle received fragment packet
+ *
+ * Parameters:
+ *  In:
+ *      pDevice         - Pointer to adapter
+ *      pMACHeader      - 802.11 MAC Header of received packet
+ *      cbFrameLength   - Frame length
+ *      bWEP            - is WEP packet
+ *  Out:
+ *      none
+ *
+ * Return Value: TRUE if it is valid fragment packet and we have resource to defragment; otherwise FALSE
+ *
+ */
+BOOL WCTLbHandleFragment (PSDevice pDevice, PS802_11Header pMACHeader, UINT cbFrameLength, BOOL bWEP, BOOL bExtIV)
+{
+UINT            uHeaderSize;
+
+
+    if (bWEP == TRUE) {
+        uHeaderSize = 28;
+        if (bExtIV)
+        // ExtIV
+            uHeaderSize +=4;
+    }
+    else {
+        uHeaderSize = 24;
+    }
+
+    if (IS_FIRST_FRAGMENT_PKT(pMACHeader)) {
+        pDevice->uCurrentDFCBIdx = WCTLuSearchDFCB(pDevice, pMACHeader);
+        if (pDevice->uCurrentDFCBIdx < pDevice->cbDFCB) {
+            // duplicate, we must flush previous DCB
+            pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].uLifetime = pDevice->dwMaxReceiveLifetime;
+            pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wSequence = (pMACHeader->wSeqCtl >> 4);
+            pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum = (pMACHeader->wSeqCtl & 0x000F);
+        }
+        else {
+            pDevice->uCurrentDFCBIdx = WCTLuInsertDFCB(pDevice, pMACHeader);
+            if (pDevice->uCurrentDFCBIdx == pDevice->cbDFCB) {
+                return(FALSE);
+            }
+        }
+        // reserve 4 byte to match MAC RX Buffer
+#ifdef PRIVATE_OBJ
+        pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer = (PBYTE) (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].ref_skb.data + 4);
+#else
+        pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer = (PBYTE) (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].skb->data + 4);
+#endif
+        memcpy(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer, pMACHeader, cbFrameLength);
+        pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength = cbFrameLength;
+        pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer += cbFrameLength;
+        pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum++;
+        //DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO "First pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx);
+        return(FALSE);
+    }
+    else {
+        pDevice->uCurrentDFCBIdx = WCTLuSearchDFCB(pDevice, pMACHeader);
+        if (pDevice->uCurrentDFCBIdx != pDevice->cbDFCB) {
+            if ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wSequence == (pMACHeader->wSeqCtl >> 4)) &&
+                (pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum == (pMACHeader->wSeqCtl & 0x000F)) &&
+                ((pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength + cbFrameLength - uHeaderSize) < 2346)) {
+
+                memcpy(pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer, ((PBYTE) (pMACHeader) + uHeaderSize), (cbFrameLength - uHeaderSize));
+                pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].cbFrameLength += (cbFrameLength - uHeaderSize);
+                pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].pbyRxBuffer += (cbFrameLength - uHeaderSize);
+                pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].wFragNum++;
+                //DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Second pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx);
+            }
+            else {
+                // seq error or frag # error flush DFCB
+                pDevice->cbFreeDFCB++;
+                pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].bInUse = FALSE;
+                return(FALSE);
+            }
+        }
+        else {
+            return(FALSE);
+        }
+        if (IS_LAST_FRAGMENT_PKT(pMACHeader)) {
+            //enq defragcontrolblock
+            pDevice->cbFreeDFCB++;
+            pDevice->sRxDFCB[pDevice->uCurrentDFCBIdx].bInUse = FALSE;
+            //DEVICE_PRT(MSG_LEVEL_DEBUG, KERN_INFO "Last pDevice->uCurrentDFCBIdx= %d\n", pDevice->uCurrentDFCBIdx);
+            return(TRUE);
+        }
+        return(FALSE);
+    }
+}
+
+