/* * HvCall.c * Copyright (C) 2001 Mike Corrigan IBM Corporation * * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include <linux/stddef.h> #include <linux/kernel.h> #include <linux/mm.h> #include <linux/slab.h> #include <asm/system.h> #include <asm/page.h> #include <asm/iSeries/HvCall.h> #include <asm/iSeries/HvCallEvent.h> #ifndef _HVCALLSC_H #include <asm/iSeries/HvCallSc.h> #endif #include <asm/iSeries/LparData.h> #ifndef _HVTYPES_H #include <asm/iSeries/HvTypes.h> #endif //===================================================================== // Note that this call takes at MOST one page worth of data int HvCall_readLogBuffer(HvLpIndex lpIndex, void *buffer, u64 bufLen) { struct HvLpBufferList *bufList; u64 bytesLeft = bufLen; u64 leftThisPage; u64 curPtr = (unsigned long) buffer; u64 retVal; int npages; int i; npages = 0; while (bytesLeft) { npages++; leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr; if (leftThisPage > bytesLeft) bytesLeft = 0; else bytesLeft -= leftThisPage; curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE; } if (npages == 0) return 0; bufList = (struct HvLpBufferList *)kmalloc(npages * sizeof(struct HvLpBufferList), GFP_ATOMIC); bytesLeft = bufLen; curPtr = (unsigned long) buffer; for(i=0; i<npages; i++) { bufList[i].addr = virt_to_absolute(curPtr); leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr; if (leftThisPage > bytesLeft) { bufList[i].len = bytesLeft; bytesLeft = 0; } else { bufList[i].len = leftThisPage; bytesLeft -= leftThisPage; } curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE; } retVal = HvCall3(HvCallBaseReadLogBuffer,lpIndex, virt_to_absolute((unsigned long)bufList), bufLen); kfree(bufList); return (int)retVal; } //===================================================================== void HvCall_writeLogBuffer(const void *buffer, u64 bufLen) { struct HvLpBufferList bufList; u64 bytesLeft = bufLen; u64 leftThisPage; u64 curPtr = (unsigned long) buffer; while (bytesLeft) { bufList.addr = virt_to_absolute( curPtr ); leftThisPage = ((curPtr & PAGE_MASK) + PAGE_SIZE) - curPtr; if (leftThisPage > bytesLeft) { bufList.len = bytesLeft; bytesLeft = 0; } else { bufList.len = leftThisPage; bytesLeft -= leftThisPage; } HvCall2(HvCallBaseWriteLogBuffer, virt_to_absolute((unsigned long)&bufList), bufList.len); curPtr = (curPtr & PAGE_MASK) + PAGE_SIZE; } }