mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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272 lines
6.7 KiB
C
272 lines
6.7 KiB
C
/*
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* This code gets the card location of the hardware
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* Copyright (C) 2001 <Allan H Trautman> <IBM Corp>
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* Copyright (C) 2005 Stephen Rothwel, IBM Corp
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the:
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* Free Software Foundation, Inc.,
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* 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* Change Activity:
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* Created, Feb 2, 2001
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* Ported to ppc64, August 20, 2001
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* End Change Activity
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*/
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#include <linux/init.h>
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#include <linux/module.h>
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#include <linux/pci.h>
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#include <asm/types.h>
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#include <asm/resource.h>
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#include <asm/abs_addr.h>
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#include <asm/pci-bridge.h>
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#include <asm/iSeries/HvTypes.h>
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#include "pci.h"
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#include "call_pci.h"
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/*
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* Size of Bus VPD data
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*/
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#define BUS_VPDSIZE 1024
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/*
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* Bus Vpd Tags
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*/
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#define VpdEndOfAreaTag 0x79
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#define VpdIdStringTag 0x82
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#define VpdVendorAreaTag 0x84
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/*
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* Mfg Area Tags
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*/
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#define VpdFruFrameId 0x4649 // "FI"
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#define VpdSlotMapFormat 0x4D46 // "MF"
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#define VpdSlotMap 0x534D // "SM"
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/*
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* Structures of the areas
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*/
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struct MfgVpdAreaStruct {
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u16 Tag;
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u8 TagLength;
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u8 AreaData1;
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u8 AreaData2;
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};
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typedef struct MfgVpdAreaStruct MfgArea;
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#define MFG_ENTRY_SIZE 3
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struct SlotMapStruct {
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u8 AgentId;
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u8 SecondaryAgentId;
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u8 PhbId;
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char CardLocation[3];
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char Parms[8];
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char Reserved[2];
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};
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typedef struct SlotMapStruct SlotMap;
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#define SLOT_ENTRY_SIZE 16
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/*
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* Parse the Slot Area
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*/
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static void __init iSeries_Parse_SlotArea(SlotMap *MapPtr, int MapLen,
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HvAgentId agent, u8 *PhbId, char card[4])
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{
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int SlotMapLen = MapLen;
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SlotMap *SlotMapPtr = MapPtr;
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/*
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* Parse Slot label until we find the one requested
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*/
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while (SlotMapLen > 0) {
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if (SlotMapPtr->AgentId == agent) {
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/*
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* If Phb wasn't found, grab the entry first one found.
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*/
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if (*PhbId == 0xff)
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*PhbId = SlotMapPtr->PhbId;
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/* Found it, extract the data. */
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if (SlotMapPtr->PhbId == *PhbId) {
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memcpy(card, &SlotMapPtr->CardLocation, 3);
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card[3] = 0;
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break;
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}
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}
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/* Point to the next Slot */
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SlotMapPtr = (SlotMap *)((char *)SlotMapPtr + SLOT_ENTRY_SIZE);
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SlotMapLen -= SLOT_ENTRY_SIZE;
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}
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}
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/*
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* Parse the Mfg Area
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*/
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static void __init iSeries_Parse_MfgArea(u8 *AreaData, int AreaLen,
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HvAgentId agent, u8 *PhbId,
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u8 *frame, char card[4])
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{
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MfgArea *MfgAreaPtr = (MfgArea *)AreaData;
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int MfgAreaLen = AreaLen;
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u16 SlotMapFmt = 0;
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/* Parse Mfg Data */
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while (MfgAreaLen > 0) {
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int MfgTagLen = MfgAreaPtr->TagLength;
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/* Frame ID (FI 4649020310 ) */
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if (MfgAreaPtr->Tag == VpdFruFrameId) /* FI */
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*frame = MfgAreaPtr->AreaData1;
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/* Slot Map Format (MF 4D46020004 ) */
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else if (MfgAreaPtr->Tag == VpdSlotMapFormat) /* MF */
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SlotMapFmt = (MfgAreaPtr->AreaData1 * 256)
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+ MfgAreaPtr->AreaData2;
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/* Slot Map (SM 534D90 */
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else if (MfgAreaPtr->Tag == VpdSlotMap) { /* SM */
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SlotMap *SlotMapPtr;
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if (SlotMapFmt == 0x1004)
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SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
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+ MFG_ENTRY_SIZE + 1);
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else
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SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
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+ MFG_ENTRY_SIZE);
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iSeries_Parse_SlotArea(SlotMapPtr, MfgTagLen,
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agent, PhbId, card);
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}
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/*
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* Point to the next Mfg Area
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* Use defined size, sizeof give wrong answer
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*/
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MfgAreaPtr = (MfgArea *)((char *)MfgAreaPtr + MfgTagLen
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+ MFG_ENTRY_SIZE);
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MfgAreaLen -= (MfgTagLen + MFG_ENTRY_SIZE);
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}
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}
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/*
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* Look for "BUS".. Data is not Null terminated.
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* PHBID of 0xFF indicates PHB was not found in VPD Data.
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*/
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static int __init iSeries_Parse_PhbId(u8 *AreaPtr, int AreaLength)
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{
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u8 *PhbPtr = AreaPtr;
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int DataLen = AreaLength;
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char PhbId = 0xFF;
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while (DataLen > 0) {
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if ((*PhbPtr == 'B') && (*(PhbPtr + 1) == 'U')
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&& (*(PhbPtr + 2) == 'S')) {
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PhbPtr += 3;
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while (*PhbPtr == ' ')
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++PhbPtr;
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PhbId = (*PhbPtr & 0x0F);
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break;
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}
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++PhbPtr;
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--DataLen;
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}
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return PhbId;
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}
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/*
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* Parse out the VPD Areas
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*/
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static void __init iSeries_Parse_Vpd(u8 *VpdData, int VpdDataLen,
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HvAgentId agent, u8 *frame, char card[4])
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{
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u8 *TagPtr = VpdData;
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int DataLen = VpdDataLen - 3;
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u8 PhbId;
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while ((*TagPtr != VpdEndOfAreaTag) && (DataLen > 0)) {
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int AreaLen = *(TagPtr + 1) + (*(TagPtr + 2) * 256);
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u8 *AreaData = TagPtr + 3;
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if (*TagPtr == VpdIdStringTag)
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PhbId = iSeries_Parse_PhbId(AreaData, AreaLen);
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else if (*TagPtr == VpdVendorAreaTag)
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iSeries_Parse_MfgArea(AreaData, AreaLen,
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agent, &PhbId, frame, card);
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/* Point to next Area. */
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TagPtr = AreaData + AreaLen;
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DataLen -= AreaLen;
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}
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}
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static void __init iSeries_Get_Location_Code(u16 bus, HvAgentId agent,
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u8 *frame, char card[4])
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{
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int BusVpdLen = 0;
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u8 *BusVpdPtr = kmalloc(BUS_VPDSIZE, GFP_KERNEL);
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if (BusVpdPtr == NULL) {
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printk("PCI: Bus VPD Buffer allocation failure.\n");
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return;
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}
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BusVpdLen = HvCallPci_getBusVpd(bus, iseries_hv_addr(BusVpdPtr),
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BUS_VPDSIZE);
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if (BusVpdLen == 0) {
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printk("PCI: Bus VPD Buffer zero length.\n");
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goto out_free;
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}
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/* printk("PCI: BusVpdPtr: %p, %d\n",BusVpdPtr, BusVpdLen); */
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/* Make sure this is what I think it is */
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if (*BusVpdPtr != VpdIdStringTag) { /* 0x82 */
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printk("PCI: Bus VPD Buffer missing starting tag.\n");
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goto out_free;
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}
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iSeries_Parse_Vpd(BusVpdPtr, BusVpdLen, agent, frame, card);
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out_free:
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kfree(BusVpdPtr);
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}
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/*
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* Prints the device information.
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* - Pass in pci_dev* pointer to the device.
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* - Pass in the device count
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*
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* Format:
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* PCI: Bus 0, Device 26, Vendor 0x12AE Frame 1, Card C10 Ethernet
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* controller
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*/
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void __init iSeries_Device_Information(struct pci_dev *PciDev, int count)
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{
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struct device_node *DevNode = PciDev->sysdata;
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struct pci_dn *pdn;
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u16 bus;
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u8 frame;
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char card[4];
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HvSubBusNumber subbus;
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HvAgentId agent;
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if (DevNode == NULL) {
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printk("%d. PCI: iSeries_Device_Information DevNode is NULL\n",
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count);
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return;
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}
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pdn = PCI_DN(DevNode);
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bus = pdn->busno;
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subbus = pdn->bussubno;
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agent = ISERIES_PCI_AGENTID(ISERIES_GET_DEVICE_FROM_SUBBUS(subbus),
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ISERIES_GET_FUNCTION_FROM_SUBBUS(subbus));
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iSeries_Get_Location_Code(bus, agent, &frame, card);
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printk("%d. PCI: Bus%3d, Device%3d, Vendor %04X Frame%3d, Card %4s ",
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count, bus, PCI_SLOT(PciDev->devfn), PciDev->vendor,
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frame, card);
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printk("0x%04X\n", (int)(PciDev->class >> 8));
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}
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