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/*
* This code gets the card location of the hardware
* Copyright (C) 2001 <Allan H Trautman> <IBM Corp>
* Copyright (C) 2005 Stephen Rothwel, IBM Corp
*
* 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
*
* Change Activity:
* Created, Feb 2, 2001
* Ported to ppc64, August 20, 2001
* End Change Activity
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/pci.h>
#include <asm/types.h>
#include <asm/resource.h>
#include <asm/abs_addr.h>
#include <asm/pci-bridge.h>
#include <asm/iseries/hv_types.h>
#include "pci.h"
#include "call_pci.h"
/*
* Size of Bus VPD data
*/
#define BUS_VPDSIZE 1024
/*
* Bus Vpd Tags
*/
#define VpdEndOfAreaTag 0x79
#define VpdIdStringTag 0x82
#define VpdVendorAreaTag 0x84
/*
* Mfg Area Tags
*/
#define VpdFruFrameId 0x4649 // "FI"
#define VpdSlotMapFormat 0x4D46 // "MF"
#define VpdSlotMap 0x534D // "SM"
/*
* Structures of the areas
*/
struct MfgVpdAreaStruct {
u16 Tag;
u8 TagLength;
u8 AreaData1;
u8 AreaData2;
};
typedef struct MfgVpdAreaStruct MfgArea;
#define MFG_ENTRY_SIZE 3
struct SlotMapStruct {
u8 AgentId;
u8 SecondaryAgentId;
u8 PhbId;
char CardLocation[3];
char Parms[8];
char Reserved[2];
};
typedef struct SlotMapStruct SlotMap;
#define SLOT_ENTRY_SIZE 16
/*
* Parse the Slot Area
*/
static void __init iSeries_Parse_SlotArea(SlotMap *MapPtr, int MapLen,
HvAgentId agent, u8 *PhbId, char card[4])
{
int SlotMapLen = MapLen;
SlotMap *SlotMapPtr = MapPtr;
/*
* Parse Slot label until we find the one requested
*/
while (SlotMapLen > 0) {
if (SlotMapPtr->AgentId == agent) {
/*
* If Phb wasn't found, grab the entry first one found.
*/
if (*PhbId == 0xff)
*PhbId = SlotMapPtr->PhbId;
/* Found it, extract the data. */
if (SlotMapPtr->PhbId == *PhbId) {
memcpy(card, &SlotMapPtr->CardLocation, 3);
card[3] = 0;
break;
}
}
/* Point to the next Slot */
SlotMapPtr = (SlotMap *)((char *)SlotMapPtr + SLOT_ENTRY_SIZE);
SlotMapLen -= SLOT_ENTRY_SIZE;
}
}
/*
* Parse the Mfg Area
*/
static void __init iSeries_Parse_MfgArea(u8 *AreaData, int AreaLen,
HvAgentId agent, u8 *PhbId,
u8 *frame, char card[4])
{
MfgArea *MfgAreaPtr = (MfgArea *)AreaData;
int MfgAreaLen = AreaLen;
u16 SlotMapFmt = 0;
/* Parse Mfg Data */
while (MfgAreaLen > 0) {
int MfgTagLen = MfgAreaPtr->TagLength;
/* Frame ID (FI 4649020310 ) */
if (MfgAreaPtr->Tag == VpdFruFrameId) /* FI */
*frame = MfgAreaPtr->AreaData1;
/* Slot Map Format (MF 4D46020004 ) */
else if (MfgAreaPtr->Tag == VpdSlotMapFormat) /* MF */
SlotMapFmt = (MfgAreaPtr->AreaData1 * 256)
+ MfgAreaPtr->AreaData2;
/* Slot Map (SM 534D90 */
else if (MfgAreaPtr->Tag == VpdSlotMap) { /* SM */
SlotMap *SlotMapPtr;
if (SlotMapFmt == 0x1004)
SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
+ MFG_ENTRY_SIZE + 1);
else
SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
+ MFG_ENTRY_SIZE);
iSeries_Parse_SlotArea(SlotMapPtr, MfgTagLen,
agent, PhbId, card);
}
/*
* Point to the next Mfg Area
* Use defined size, sizeof give wrong answer
*/
MfgAreaPtr = (MfgArea *)((char *)MfgAreaPtr + MfgTagLen
+ MFG_ENTRY_SIZE);
MfgAreaLen -= (MfgTagLen + MFG_ENTRY_SIZE);
}
}
/*
* Look for "BUS".. Data is not Null terminated.
* PHBID of 0xFF indicates PHB was not found in VPD Data.
*/
static int __init iSeries_Parse_PhbId(u8 *AreaPtr, int AreaLength)
{
u8 *PhbPtr = AreaPtr;
int DataLen = AreaLength;
char PhbId = 0xFF;
while (DataLen > 0) {
if ((*PhbPtr == 'B') && (*(PhbPtr + 1) == 'U')
&& (*(PhbPtr + 2) == 'S')) {
PhbPtr += 3;
while (*PhbPtr == ' ')
++PhbPtr;
PhbId = (*PhbPtr & 0x0F);
break;
}
++PhbPtr;
--DataLen;
}
return PhbId;
}
/*
* Parse out the VPD Areas
*/
static void __init iSeries_Parse_Vpd(u8 *VpdData, int VpdDataLen,
HvAgentId agent, u8 *frame, char card[4])
{
u8 *TagPtr = VpdData;
int DataLen = VpdDataLen - 3;
u8 PhbId = 0xff;
while ((*TagPtr != VpdEndOfAreaTag) && (DataLen > 0)) {
int AreaLen = *(TagPtr + 1) + (*(TagPtr + 2) * 256);
u8 *AreaData = TagPtr + 3;
if (*TagPtr == VpdIdStringTag)
PhbId = iSeries_Parse_PhbId(AreaData, AreaLen);
else if (*TagPtr == VpdVendorAreaTag)
iSeries_Parse_MfgArea(AreaData, AreaLen,
agent, &PhbId, frame, card);
/* Point to next Area. */
TagPtr = AreaData + AreaLen;
DataLen -= AreaLen;
}
}
static int __init iSeries_Get_Location_Code(u16 bus, HvAgentId agent,
u8 *frame, char card[4])
{
int status = 0;
int BusVpdLen = 0;
u8 *BusVpdPtr = kmalloc(BUS_VPDSIZE, GFP_KERNEL);
if (BusVpdPtr == NULL) {
printk("PCI: Bus VPD Buffer allocation failure.\n");
return 0;
}
BusVpdLen = HvCallPci_getBusVpd(bus, iseries_hv_addr(BusVpdPtr),
BUS_VPDSIZE);
if (BusVpdLen == 0) {
printk("PCI: Bus VPD Buffer zero length.\n");
goto out_free;
}
/* printk("PCI: BusVpdPtr: %p, %d\n",BusVpdPtr, BusVpdLen); */
/* Make sure this is what I think it is */
if (*BusVpdPtr != VpdIdStringTag) { /* 0x82 */
printk("PCI: Bus VPD Buffer missing starting tag.\n");
goto out_free;
}
iSeries_Parse_Vpd(BusVpdPtr, BusVpdLen, agent, frame, card);
status = 1;
out_free:
kfree(BusVpdPtr);
return status;
}
/*
* Prints the device information.
* - Pass in pci_dev* pointer to the device.
* - Pass in the device count
*
* Format:
* PCI: Bus 0, Device 26, Vendor 0x12AE Frame 1, Card C10 Ethernet
* controller
*/
void __init iSeries_Device_Information(struct pci_dev *PciDev, int count)
{
struct device_node *DevNode = PciDev->sysdata;
struct pci_dn *pdn;
u16 bus;
u8 frame = 0;
char card[4];
HvSubBusNumber subbus;
HvAgentId agent;
if (DevNode == NULL) {
printk("%d. PCI: iSeries_Device_Information DevNode is NULL\n",
count);
return;
}
pdn = PCI_DN(DevNode);
bus = pdn->busno;
subbus = pdn->bussubno;
agent = ISERIES_PCI_AGENTID(ISERIES_GET_DEVICE_FROM_SUBBUS(subbus),
ISERIES_GET_FUNCTION_FROM_SUBBUS(subbus));
if (iSeries_Get_Location_Code(bus, agent, &frame, card)) {
printk("%d. PCI: Bus%3d, Device%3d, Vendor %04X Frame%3d, "
"Card %4s 0x%04X\n", count, bus,
PCI_SLOT(PciDev->devfn), PciDev->vendor, frame,
card, (int)(PciDev->class >> 8));
}
}
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