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vpdinfo.c

/*
 * 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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