src/vendorcode/amd/agesa/f15/Proc/HT/Features/htFeatSublinks.c

   1 /* $NoKeywords:$ */
   2 /**
   3  * @file
   4  *
   5  * SubLink management Routines.
   6  *
   7  * Contains routines for subLink frequency ratios.
   8  *
   9  * @xrefitem bom "File Content Label" "Release Content"
  10  * @e project:      AGESA
  11  * @e sub-project:  HyperTransport
  12  * @e \$Revision: 56279 $   @e \$Date: 2011-07-11 13:11:28 -0600 (Mon, 11 Jul 2011) $
  13  *
  14  */
  15 /*
  16 *****************************************************************************
  17 *
  18 * Copyright (C) 2012 Advanced Micro Devices, Inc.
  19 * All rights reserved.
  20 *
  21 * Redistribution and use in source and binary forms, with or without
  22 * modification, are permitted provided that the following conditions are met:
  23 *     * Redistributions of source code must retain the above copyright
  24 *       notice, this list of conditions and the following disclaimer.
  25 *     * Redistributions in binary form must reproduce the above copyright
  26 *       notice, this list of conditions and the following disclaimer in the
  27 *       documentation and/or other materials provided with the distribution.
  28 *     * Neither the name of Advanced Micro Devices, Inc. nor the names of
  29 *       its contributors may be used to endorse or promote products derived
  30 *       from this software without specific prior written permission.
  31 *
  32 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
  33 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  34 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  35 * DISCLAIMED. IN NO EVENT SHALL ADVANCED MICRO DEVICES, INC. BE LIABLE FOR ANY
  36 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
  37 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  38 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  39 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  40 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  41 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  42 *
  43 * ***************************************************************************
  44 *
  45 */
  46
  47 /*
  48  *----------------------------------------------------------------------------
  49  *                                MODULES USED
  50  *
  51  *----------------------------------------------------------------------------
  52  */
  53
  54
  55
  56 #include "AGESA.h"
  57 #include "Ids.h"
  58 #include "amdlib.h"
  59 #include "Topology.h"
  60 #include "htFeat.h"
  61 #include "IdsHt.h"
  62 #include "htFeatSublinks.h"
  63 #include "Filecode.h"
  64 CODE_GROUP (G1_PEICC)
  65 RDATA_GROUP (G2_PEI)
  66
  67 #define FILECODE PROC_HT_FEATURES_HTFEATSUBLINKS_FILECODE
  68 /*----------------------------------------------------------------------------
  69  *                          DEFINITIONS AND MACROS
  70  *
  71  *----------------------------------------------------------------------------
  72  */
  73
  74 /*----------------------------------------------------------------------------
  75  *                           TYPEDEFS AND STRUCTURES
  76  *
  77  *----------------------------------------------------------------------------
  78  */
  79
  80 typedef struct {
  81   UINT8 HiFreq;
  82   UINT8 LoFreq;
  83 } VALID_RATIO_ITEM;
  84
  85 STATIC CONST VALID_RATIO_ITEM ROMDATA ValidRatioList[] =
  86 {
  87   {HT_FREQUENCY_3200M, HT_FREQUENCY_1600M},   // 3200MHz / 1600MHz 2:1
  88   {HT_FREQUENCY_3200M, HT_FREQUENCY_800M},    // 3200MHz / 800MHz  4:1
  89   {HT_FREQUENCY_3200M, HT_FREQUENCY_400M},    // 3200MHz / 400MHz  8:1
  90   {HT_FREQUENCY_2800M, HT_FREQUENCY_1400M},   // 2800MHz / 1400MHz 2:1
  91   {HT_FREQUENCY_2400M, HT_FREQUENCY_1200M},   // 2400MHz / 1200MHz 2:1
  92   {HT_FREQUENCY_2400M, HT_FREQUENCY_600M},    // 2400MHz /  600MHz 4:1
  93   {HT_FREQUENCY_2400M, HT_FREQUENCY_400M},    // 2400MHz /  400MHz 6:1
  94   {HT_FREQUENCY_2000M, HT_FREQUENCY_1000M},   // 2000MHz / 1000MHz 2:1
  95   {HT_FREQUENCY_1600M, HT_FREQUENCY_800M},    // 1600MHz /  800MHz 2:1
  96   {HT_FREQUENCY_1600M, HT_FREQUENCY_400M},    // 1600MHz /  400MHz 4:1
  97   {HT_FREQUENCY_1600M, HT_FREQUENCY_200M},    // 1600MHz /  200Mhz 8:1
  98   {HT_FREQUENCY_1200M, HT_FREQUENCY_600M},    // 1200MHz /  600MHz 2:1
  99   {HT_FREQUENCY_1200M, HT_FREQUENCY_200M},    // 1200MHz /  200MHz 6:1
 100   {HT_FREQUENCY_800M,  HT_FREQUENCY_400M},    // 800MHz /  400MHz 2:1
 101   {HT_FREQUENCY_800M,  HT_FREQUENCY_200M},    // 800MHz /  200MHz 4:1
 102   {HT_FREQUENCY_400M,  HT_FREQUENCY_200M}     // 400MHz /  200MHz 2:1
 103 };
 104
 105 /*----------------------------------------------------------------------------
 106  *                        PROTOTYPES OF LOCAL FUNCTIONS
 107  *
 108  *----------------------------------------------------------------------------
 109  */
 110
 111 /*----------------------------------------------------------------------------
 112  *                            EXPORTED FUNCTIONS
 113  *
 114  *----------------------------------------------------------------------------
 115  */
 116
 117 /*----------------------------------------------------------------------------
 118  *                              LOCAL FUNCTIONS
 119  *
 120  *----------------------------------------------------------------------------
 121  */
 122
 123 /***************************************************************************
 124  ***                            Link Optimization                        ***
 125  ***************************************************************************/
 126
 127 /*----------------------------------------------------------------------------------------*/
 128 /**
 129  * Iterate through all Links, checking the frequency of each subLink pair.
 130  *
 131  * @HtFeatMethod{::F_SUBLINK_RATIO_FIXUP}
 132  *
 133  * Make the adjustment to the port list data so that the frequencies
 134  * are at a valid ratio, reducing frequency as needed to achieve
 135  * this. (All Links support the minimum 200 MHz frequency.)  Repeat
 136  * the above until no adjustments are needed.
 137  * @note no hardware state changes in this routine.
 138  *
 139  * @param[in,out]     State     Link state and port list
 140  *
 141  */
 142 VOID
 143 SubLinkRatioFixup (
 144   IN OUT   STATE_DATA    *State
 145   )
 146 {
 147   UINT8 i;
 148   UINT8 j;
 149   UINT8 ValidRatioItem;
 150   BOOLEAN Changes;
 151   BOOLEAN Downgrade;
 152   UINT8 HiIndex;
 153   UINT8 HiFreq;
 154   UINT8 LoFreq;
 155
 156   UINT32 Temp;
 157
 158   do {
 159     Changes = FALSE;
 160     for (i = 0; i < State->TotalLinks*2; i++) {
 161       // Must be a CPU Link
 162       if ((*State->PortList)[i].Type != PORTLIST_TYPE_CPU) {
 163         continue;
 164       }
 165       // Only look for subLink1's
 166       if ((*State->PortList)[i].Link < 4) {
 167         continue;
 168       }
 169
 170       for (j = 0; j < State->TotalLinks*2; j++) {
 171         // Step 1. Find the matching subLink0
 172         if ((*State->PortList)[j].Type != PORTLIST_TYPE_CPU) {
 173           continue;
 174         }
 175         if ((*State->PortList)[j].NodeID != (*State->PortList)[i].NodeID) {
 176           continue;
 177         }
 178         if ((*State->PortList)[j].Link != ((*State->PortList)[i].Link & 0x03)) {
 179           continue;
 180         }
 181
 182         // Step 2. Check for an illegal frequency ratio
 183         if ((*State->PortList)[i].SelFrequency >= (*State->PortList)[j].SelFrequency) {
 184           HiIndex = i;
 185           HiFreq = (*State->PortList)[i].SelFrequency;
 186           LoFreq = (*State->PortList)[j].SelFrequency;
 187         } else {
 188           HiIndex = j;
 189           HiFreq = (*State->PortList)[j].SelFrequency;
 190           LoFreq = (*State->PortList)[i].SelFrequency;
 191         }
 192
 193         // The frequencies are 1:1, no need to do anything
 194         if (HiFreq == LoFreq) {
 195           break;
 196         }
 197
 198         Downgrade = TRUE;
 199
 200         for (ValidRatioItem = 0; ValidRatioItem < (sizeof (ValidRatioList) / sizeof (VALID_RATIO_ITEM)); ValidRatioItem++) {
 201           if ((HiFreq == ValidRatioList[ValidRatioItem].HiFreq) &&
 202               (LoFreq == ValidRatioList[ValidRatioItem].LoFreq)) {
 203             Downgrade = FALSE;
 204             break;
 205           }
 206         }
 207
 208         // Step 3. Downgrade the higher of the two frequencies, and set Changes to FALSE
 209         if (Downgrade) {
 210           // Although the problem was with the port specified by hiIndex, we need to
 211           // Downgrade both ends of the Link.
 212           HiIndex = HiIndex & 0xFE; // Select the 'upstream' (i.e. even) port
 213
 214           Temp = (*State->PortList)[HiIndex].CompositeFrequencyCap;
 215
 216           // Remove HiFreq from the list of valid frequencies
 217           Temp = Temp & ~((UINT32)1 << HiFreq);
 218           ASSERT (Temp != 0);
 219           (*State->PortList)[HiIndex].CompositeFrequencyCap = (UINT32)Temp;
 220           (*State->PortList)[HiIndex + 1].CompositeFrequencyCap = (UINT32)Temp;
 221
 222           HiFreq = LibAmdBitScanReverse (Temp);
 223
 224           (*State->PortList)[HiIndex].SelFrequency = HiFreq;
 225           (*State->PortList)[HiIndex + 1].SelFrequency = HiFreq;
 226
 227           Changes = TRUE;
 228         }
 229       }
 230     }
 231   } while (Changes); // Repeat until a valid configuration is reached
 232 }