arch/powerpc/platforms/iseries/vpdinfo.c

   1 /*
   2  * This code gets the card location of the hardware
   3  * Copyright (C) 2001  <Allan H Trautman> <IBM Corp>
   4  * Copyright (C) 2005  Stephen Rothwel, IBM Corp
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the:
  18  * Free Software Foundation, Inc.,
  19  * 59 Temple Place, Suite 330,
  20  * Boston, MA  02111-1307  USA
  21  *
  22  * Change Activity:
  23  *   Created, Feb 2, 2001
  24  *   Ported to ppc64, August 20, 2001
  25  * End Change Activity
  26  */
  27 #include <linux/init.h>
  28 #include <linux/module.h>
  29 #include <linux/pci.h>
  30
  31 #include <asm/types.h>
  32 #include <asm/resource.h>
  33 #include <asm/abs_addr.h>
  34 #include <asm/iSeries/HvCallPci.h>
  35 #include <asm/iSeries/HvTypes.h>
  36
  37 #include "pci.h"
  38
  39 /*
  40  * Size of Bus VPD data
  41  */
  42 #define BUS_VPDSIZE      1024
  43
  44 /*
  45  * Bus Vpd Tags
  46  */
  47 #define  VpdEndOfAreaTag   0x79
  48 #define  VpdIdStringTag    0x82
  49 #define  VpdVendorAreaTag  0x84
  50
  51 /*
  52  * Mfg Area Tags
  53  */
  54 #define  VpdFruFrameId    0x4649     // "FI"
  55 #define  VpdSlotMapFormat 0x4D46     // "MF"
  56 #define  VpdSlotMap       0x534D     // "SM"
  57
  58 /*
  59  * Structures of the areas
  60  */
  61 struct MfgVpdAreaStruct {
  62         u16 Tag;
  63         u8  TagLength;
  64         u8  AreaData1;
  65         u8  AreaData2;
  66 };
  67 typedef struct MfgVpdAreaStruct MfgArea;
  68 #define MFG_ENTRY_SIZE   3
  69
  70 struct SlotMapStruct {
  71         u8   AgentId;
  72         u8   SecondaryAgentId;
  73         u8   PhbId;
  74         char CardLocation[3];
  75         char Parms[8];
  76         char Reserved[2];
  77 };
  78 typedef struct SlotMapStruct SlotMap;
  79 #define SLOT_ENTRY_SIZE   16
  80
  81 /*
  82  * Parse the Slot Area
  83  */
  84 static void __init iSeries_Parse_SlotArea(SlotMap *MapPtr, int MapLen,
  85                 HvAgentId agent, u8 *PhbId, char card[4])
  86 {
  87         int SlotMapLen = MapLen;
  88         SlotMap *SlotMapPtr = MapPtr;
  89
  90         /*
  91          * Parse Slot label until we find the one requested
  92          */
  93         while (SlotMapLen > 0) {
  94                 if (SlotMapPtr->AgentId == agent) {
  95                         /*
  96                          * If Phb wasn't found, grab the entry first one found.
  97                          */
  98                         if (*PhbId == 0xff)
  99                                 *PhbId = SlotMapPtr->PhbId;
 100                         /* Found it, extract the data. */
 101                         if (SlotMapPtr->PhbId == *PhbId) {
 102                                 memcpy(card, &SlotMapPtr->CardLocation, 3);
 103                                 card[3]  = 0;
 104                                 break;
 105                         }
 106                 }
 107                 /* Point to the next Slot */
 108                 SlotMapPtr = (SlotMap *)((char *)SlotMapPtr + SLOT_ENTRY_SIZE);
 109                 SlotMapLen -= SLOT_ENTRY_SIZE;
 110         }
 111 }
 112
 113 /*
 114  * Parse the Mfg Area
 115  */
 116 static void __init iSeries_Parse_MfgArea(u8 *AreaData, int AreaLen,
 117                 HvAgentId agent, u8 *PhbId,
 118                 u8 *frame, char card[4])
 119 {
 120         MfgArea *MfgAreaPtr = (MfgArea *)AreaData;
 121         int MfgAreaLen = AreaLen;
 122         u16 SlotMapFmt = 0;
 123
 124         /* Parse Mfg Data */
 125         while (MfgAreaLen > 0) {
 126                 int MfgTagLen = MfgAreaPtr->TagLength;
 127                 /* Frame ID         (FI 4649020310 ) */
 128                 if (MfgAreaPtr->Tag == VpdFruFrameId)           /* FI  */
 129                         *frame = MfgAreaPtr->AreaData1;
 130                 /* Slot Map Format  (MF 4D46020004 ) */
 131                 else if (MfgAreaPtr->Tag == VpdSlotMapFormat)   /* MF  */
 132                         SlotMapFmt = (MfgAreaPtr->AreaData1 * 256)
 133                                 + MfgAreaPtr->AreaData2;
 134                 /* Slot Map         (SM 534D90 */
 135                 else if (MfgAreaPtr->Tag == VpdSlotMap) {       /* SM  */
 136                         SlotMap *SlotMapPtr;
 137
 138                         if (SlotMapFmt == 0x1004)
 139                                 SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
 140                                                 + MFG_ENTRY_SIZE + 1);
 141                         else
 142                                 SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
 143                                                 + MFG_ENTRY_SIZE);
 144                         iSeries_Parse_SlotArea(SlotMapPtr, MfgTagLen,
 145                                         agent, PhbId, card);
 146                 }
 147                 /*
 148                  * Point to the next Mfg Area
 149                  * Use defined size, sizeof give wrong answer
 150                  */
 151                 MfgAreaPtr = (MfgArea *)((char *)MfgAreaPtr + MfgTagLen
 152                                 + MFG_ENTRY_SIZE);
 153                 MfgAreaLen -= (MfgTagLen + MFG_ENTRY_SIZE);
 154         }
 155 }
 156
 157 /*
 158  * Look for "BUS".. Data is not Null terminated.
 159  * PHBID of 0xFF indicates PHB was not found in VPD Data.
 160  */
 161 static int __init iSeries_Parse_PhbId(u8 *AreaPtr, int AreaLength)
 162 {
 163         u8 *PhbPtr = AreaPtr;
 164         int DataLen = AreaLength;
 165         char PhbId = 0xFF;
 166
 167         while (DataLen > 0) {
 168                 if ((*PhbPtr == 'B') && (*(PhbPtr + 1) == 'U')
 169                                 && (*(PhbPtr + 2) == 'S')) {
 170                         PhbPtr += 3;
 171                         while (*PhbPtr == ' ')
 172                                 ++PhbPtr;
 173                         PhbId = (*PhbPtr & 0x0F);
 174                         break;
 175                 }
 176                 ++PhbPtr;
 177                 --DataLen;
 178         }
 179         return PhbId;
 180 }
 181
 182 /*
 183  * Parse out the VPD Areas
 184  */
 185 static void __init iSeries_Parse_Vpd(u8 *VpdData, int VpdDataLen,
 186                 HvAgentId agent, u8 *frame, char card[4])
 187 {
 188         u8 *TagPtr = VpdData;
 189         int DataLen = VpdDataLen - 3;
 190         u8 PhbId;
 191
 192         while ((*TagPtr != VpdEndOfAreaTag) && (DataLen > 0)) {
 193                 int AreaLen = *(TagPtr + 1) + (*(TagPtr + 2) * 256);
 194                 u8 *AreaData  = TagPtr + 3;
 195
 196                 if (*TagPtr == VpdIdStringTag)
 197                         PhbId = iSeries_Parse_PhbId(AreaData, AreaLen);
 198                 else if (*TagPtr == VpdVendorAreaTag)
 199                         iSeries_Parse_MfgArea(AreaData, AreaLen,
 200                                         agent, &PhbId, frame, card);
 201                 /* Point to next Area. */
 202                 TagPtr  = AreaData + AreaLen;
 203                 DataLen -= AreaLen;
 204         }
 205 }
 206
 207 static void __init iSeries_Get_Location_Code(u16 bus, HvAgentId agent,
 208                 u8 *frame, char card[4])
 209 {
 210         int BusVpdLen = 0;
 211         u8 *BusVpdPtr = kmalloc(BUS_VPDSIZE, GFP_KERNEL);
 212
 213         if (BusVpdPtr == NULL) {
 214                 printk("PCI: Bus VPD Buffer allocation failure.\n");
 215                 return;
 216         }
 217         BusVpdLen = HvCallPci_getBusVpd(bus, iseries_hv_addr(BusVpdPtr),
 218                                         BUS_VPDSIZE);
 219         if (BusVpdLen == 0) {
 220                 printk("PCI: Bus VPD Buffer zero length.\n");
 221                 goto out_free;
 222         }
 223         /* printk("PCI: BusVpdPtr: %p, %d\n",BusVpdPtr, BusVpdLen); */
 224         /* Make sure this is what I think it is */
 225         if (*BusVpdPtr != VpdIdStringTag) {     /* 0x82 */
 226                 printk("PCI: Bus VPD Buffer missing starting tag.\n");
 227                 goto out_free;
 228         }
 229         iSeries_Parse_Vpd(BusVpdPtr, BusVpdLen, agent, frame, card);
 230 out_free:
 231         kfree(BusVpdPtr);
 232 }
 233
 234 /*
 235  * Prints the device information.
 236  * - Pass in pci_dev* pointer to the device.
 237  * - Pass in the device count
 238  *
 239  * Format:
 240  * PCI: Bus  0, Device 26, Vendor 0x12AE  Frame  1, Card  C10  Ethernet
 241  * controller
 242  */
 243 void __init iSeries_Device_Information(struct pci_dev *PciDev, int count)
 244 {
 245         struct device_node *DevNode = PciDev->sysdata;
 246         u16 bus;
 247         u8 frame;
 248         char card[4];
 249         HvSubBusNumber subbus;
 250         HvAgentId agent;
 251
 252         if (DevNode == NULL) {
 253                 printk("%d. PCI: iSeries_Device_Information DevNode is NULL\n",
 254                                 count);
 255                 return;
 256         }
 257
 258         bus = ISERIES_BUS(DevNode);
 259         subbus = ISERIES_SUBBUS(DevNode);
 260         agent = ISERIES_PCI_AGENTID(ISERIES_GET_DEVICE_FROM_SUBBUS(subbus),
 261                         ISERIES_GET_FUNCTION_FROM_SUBBUS(subbus));
 262         iSeries_Get_Location_Code(bus, agent, &frame, card);
 263
 264         printk("%d. PCI: Bus%3d, Device%3d, Vendor %04X Frame%3d, Card %4s  ",
 265                         count, bus, PCI_SLOT(PciDev->devfn), PciDev->vendor,
 266                         frame, card);
 267         printk("0x%04X\n", (int)(PciDev->class >> 8));
 268 }