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 #include <asm/types.h>
  31 #include <asm/resource.h>
  32
  33 #include <asm/iSeries/HvCallPci.h>
  34 #include <asm/iSeries/HvTypes.h>
  35 #include <asm/iSeries/iSeries_pci.h>
  36
  37 /*
  38  * Size of Bus VPD data
  39  */
  40 #define BUS_VPDSIZE      1024
  41
  42 /*
  43  * Bus Vpd Tags
  44  */
  45 #define  VpdEndOfAreaTag   0x79
  46 #define  VpdIdStringTag    0x82
  47 #define  VpdVendorAreaTag  0x84
  48
  49 /*
  50  * Mfg Area Tags
  51  */
  52 #define  VpdFruFrameId    0x4649     // "FI"
  53 #define  VpdSlotMapFormat 0x4D46     // "MF"
  54 #define  VpdSlotMap       0x534D     // "SM"
  55
  56 /*
  57  * Structures of the areas
  58  */
  59 struct MfgVpdAreaStruct {
  60         u16 Tag;
  61         u8  TagLength;
  62         u8  AreaData1;
  63         u8  AreaData2;
  64 };
  65 typedef struct MfgVpdAreaStruct MfgArea;
  66 #define MFG_ENTRY_SIZE   3
  67
  68 struct SlotMapStruct {
  69         u8   AgentId;
  70         u8   SecondaryAgentId;
  71         u8   PhbId;
  72         char CardLocation[3];
  73         char Parms[8];
  74         char Reserved[2];
  75 };
  76 typedef struct SlotMapStruct SlotMap;
  77 #define SLOT_ENTRY_SIZE   16
  78
  79 /*
  80  * Parse the Slot Area
  81  */
  82 static void __init iSeries_Parse_SlotArea(SlotMap *MapPtr, int MapLen,
  83                 HvAgentId agent, u8 *PhbId, char card[4])
  84 {
  85         int SlotMapLen = MapLen;
  86         SlotMap *SlotMapPtr = MapPtr;
  87
  88         /*
  89          * Parse Slot label until we find the one requested
  90          */
  91         while (SlotMapLen > 0) {
  92                 if (SlotMapPtr->AgentId == agent) {
  93                         /*
  94                          * If Phb wasn't found, grab the entry first one found.
  95                          */
  96                         if (*PhbId == 0xff)
  97                                 *PhbId = SlotMapPtr->PhbId;
  98                         /* Found it, extract the data. */
  99                         if (SlotMapPtr->PhbId == *PhbId) {
 100                                 memcpy(card, &SlotMapPtr->CardLocation, 3);
 101                                 card[3]  = 0;
 102                                 break;
 103                         }
 104                 }
 105                 /* Point to the next Slot */
 106                 SlotMapPtr = (SlotMap *)((char *)SlotMapPtr + SLOT_ENTRY_SIZE);
 107                 SlotMapLen -= SLOT_ENTRY_SIZE;
 108         }
 109 }
 110
 111 /*
 112  * Parse the Mfg Area
 113  */
 114 static void __init iSeries_Parse_MfgArea(u8 *AreaData, int AreaLen,
 115                 HvAgentId agent, u8 *PhbId,
 116                 u8 *frame, char card[4])
 117 {
 118         MfgArea *MfgAreaPtr = (MfgArea *)AreaData;
 119         int MfgAreaLen = AreaLen;
 120         u16 SlotMapFmt = 0;
 121
 122         /* Parse Mfg Data */
 123         while (MfgAreaLen > 0) {
 124                 int MfgTagLen = MfgAreaPtr->TagLength;
 125                 /* Frame ID         (FI 4649020310 ) */
 126                 if (MfgAreaPtr->Tag == VpdFruFrameId)           /* FI  */
 127                         *frame = MfgAreaPtr->AreaData1;
 128                 /* Slot Map Format  (MF 4D46020004 ) */
 129                 else if (MfgAreaPtr->Tag == VpdSlotMapFormat)   /* MF  */
 130                         SlotMapFmt = (MfgAreaPtr->AreaData1 * 256)
 131                                 + MfgAreaPtr->AreaData2;
 132                 /* Slot Map         (SM 534D90 */
 133                 else if (MfgAreaPtr->Tag == VpdSlotMap) {       /* SM  */
 134                         SlotMap *SlotMapPtr;
 135
 136                         if (SlotMapFmt == 0x1004)
 137                                 SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
 138                                                 + MFG_ENTRY_SIZE + 1);
 139                         else
 140                                 SlotMapPtr = (SlotMap *)((char *)MfgAreaPtr
 141                                                 + MFG_ENTRY_SIZE);
 142                         iSeries_Parse_SlotArea(SlotMapPtr, MfgTagLen,
 143                                         agent, PhbId, card);
 144                 }
 145                 /*
 146                  * Point to the next Mfg Area
 147                  * Use defined size, sizeof give wrong answer
 148                  */
 149                 MfgAreaPtr = (MfgArea *)((char *)MfgAreaPtr + MfgTagLen
 150                                 + MFG_ENTRY_SIZE);
 151                 MfgAreaLen -= (MfgTagLen + MFG_ENTRY_SIZE);
 152         }
 153 }
 154
 155 /*
 156  * Look for "BUS".. Data is not Null terminated.
 157  * PHBID of 0xFF indicates PHB was not found in VPD Data.
 158  */
 159 static int __init iSeries_Parse_PhbId(u8 *AreaPtr, int AreaLength)
 160 {
 161         u8 *PhbPtr = AreaPtr;
 162         int DataLen = AreaLength;
 163         char PhbId = 0xFF;
 164
 165         while (DataLen > 0) {
 166                 if ((*PhbPtr == 'B') && (*(PhbPtr + 1) == 'U')
 167                                 && (*(PhbPtr + 2) == 'S')) {
 168                         PhbPtr += 3;
 169                         while (*PhbPtr == ' ')
 170                                 ++PhbPtr;
 171                         PhbId = (*PhbPtr & 0x0F);
 172                         break;
 173                 }
 174                 ++PhbPtr;
 175                 --DataLen;
 176         }
 177         return PhbId;
 178 }
 179
 180 /*
 181  * Parse out the VPD Areas
 182  */
 183 static void __init iSeries_Parse_Vpd(u8 *VpdData, int VpdDataLen,
 184                 HvAgentId agent, u8 *frame, char card[4])
 185 {
 186         u8 *TagPtr = VpdData;
 187         int DataLen = VpdDataLen - 3;
 188         u8 PhbId;
 189
 190         while ((*TagPtr != VpdEndOfAreaTag) && (DataLen > 0)) {
 191                 int AreaLen = *(TagPtr + 1) + (*(TagPtr + 2) * 256);
 192                 u8 *AreaData  = TagPtr + 3;
 193
 194                 if (*TagPtr == VpdIdStringTag)
 195                         PhbId = iSeries_Parse_PhbId(AreaData, AreaLen);
 196                 else if (*TagPtr == VpdVendorAreaTag)
 197                         iSeries_Parse_MfgArea(AreaData, AreaLen,
 198                                         agent, &PhbId, frame, card);
 199                 /* Point to next Area. */
 200                 TagPtr  = AreaData + AreaLen;
 201                 DataLen -= AreaLen;
 202         }
 203 }
 204
 205 static void __init iSeries_Get_Location_Code(u16 bus, HvAgentId agent,
 206                 u8 *frame, char card[4])
 207 {
 208         int BusVpdLen = 0;
 209         u8 *BusVpdPtr = kmalloc(BUS_VPDSIZE, GFP_KERNEL);
 210
 211         if (BusVpdPtr == NULL) {
 212                 printk("PCI: Bus VPD Buffer allocation failure.\n");
 213                 return;
 214         }
 215         BusVpdLen = HvCallPci_getBusVpd(bus, ISERIES_HV_ADDR(BusVpdPtr),
 216                                         BUS_VPDSIZE);
 217         if (BusVpdLen == 0) {
 218                 printk("PCI: Bus VPD Buffer zero length.\n");
 219                 goto out_free;
 220         }
 221         /* printk("PCI: BusVpdPtr: %p, %d\n",BusVpdPtr, BusVpdLen); */
 222         /* Make sure this is what I think it is */
 223         if (*BusVpdPtr != VpdIdStringTag) {     /* 0x82 */
 224                 printk("PCI: Bus VPD Buffer missing starting tag.\n");
 225                 goto out_free;
 226         }
 227         iSeries_Parse_Vpd(BusVpdPtr, BusVpdLen, agent, frame, card);
 228 out_free:
 229         kfree(BusVpdPtr);
 230 }
 231
 232 /*
 233  * Prints the device information.
 234  * - Pass in pci_dev* pointer to the device.
 235  * - Pass in the device count
 236  *
 237  * Format:
 238  * PCI: Bus  0, Device 26, Vendor 0x12AE  Frame  1, Card  C10  Ethernet
 239  * controller
 240  */
 241 void __init iSeries_Device_Information(struct pci_dev *PciDev, int count)
 242 {
 243         struct device_node *DevNode = PciDev->sysdata;
 244         u16 bus;
 245         u8 frame;
 246         char card[4];
 247         HvSubBusNumber subbus;
 248         HvAgentId agent;
 249
 250         if (DevNode == NULL) {
 251                 printk("%d. PCI: iSeries_Device_Information DevNode is NULL\n",
 252                                 count);
 253                 return;
 254         }
 255
 256         bus = ISERIES_BUS(DevNode);
 257         subbus = ISERIES_SUBBUS(DevNode);
 258         agent = ISERIES_PCI_AGENTID(ISERIES_GET_DEVICE_FROM_SUBBUS(subbus),
 259                         ISERIES_GET_FUNCTION_FROM_SUBBUS(subbus));
 260         iSeries_Get_Location_Code(bus, agent, &frame, card);
 261
 262         printk("%d. PCI: Bus%3d, Device%3d, Vendor %04X Frame%3d, Card %4s  ",
 263                         count, bus, PCI_SLOT(PciDev->devfn), PciDev->vendor,
 264                         frame, card);
 265         printk("0x%04X\n", (int)(PciDev->class >> 8));
 266 }