drivers/gpu/drm/amd/amdgpu/gfxhub_v1_1.c

   1 /*
   2  * Copyright 2018 Advanced Micro Devices, Inc.
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice shall be included in
  12  * all copies or substantial portions of the Software.
  13  *
  14  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  15  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  16  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  17  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  18  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  19  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  20  * OTHER DEALINGS IN THE SOFTWARE.
  21  *
  22  */
  23 #include "amdgpu.h"
  24 #include "gfxhub_v1_1.h"
  25
  26 #include "gc/gc_9_2_1_offset.h"
  27 #include "gc/gc_9_2_1_sh_mask.h"
  28
  29 #include "soc15_common.h"
  30
  31 #define mmMC_VM_XGMI_LFB_CNTL_ALDE                      0x0978
  32 #define mmMC_VM_XGMI_LFB_CNTL_ALDE_BASE_IDX             0
  33 #define mmMC_VM_XGMI_LFB_SIZE_ALDE                      0x0979
  34 #define mmMC_VM_XGMI_LFB_SIZE_ALDE_BASE_IDX             0
  35 //MC_VM_XGMI_LFB_CNTL
  36 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION__SHIFT  0x0
  37 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION__SHIFT  0x4
  38 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_LFB_REGION_MASK    0x0000000FL
  39 #define MC_VM_XGMI_LFB_CNTL_ALDE__PF_MAX_REGION_MASK    0x000000F0L
  40 //MC_VM_XGMI_LFB_SIZE
  41 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE__SHIFT    0x0
  42 #define MC_VM_XGMI_LFB_SIZE_ALDE__PF_LFB_SIZE_MASK      0x0001FFFFL
  43
  44 int gfxhub_v1_1_get_xgmi_info(struct amdgpu_device *adev)
  45 {
  46         u32 max_num_physical_nodes;
  47         u32 max_physical_node_id;
  48         u32 xgmi_lfb_cntl;
  49         u32 max_region;
  50         u64 seg_size;
  51
  52         if (adev->asic_type == CHIP_ALDEBARAN) {
  53                 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL_ALDE);
  54                 seg_size = REG_GET_FIELD(
  55                         RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE_ALDE),
  56                         MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
  57         } else {
  58                 xgmi_lfb_cntl = RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_CNTL);
  59                 seg_size = REG_GET_FIELD(
  60                         RREG32_SOC15(GC, 0, mmMC_VM_XGMI_LFB_SIZE),
  61                         MC_VM_XGMI_LFB_SIZE, PF_LFB_SIZE) << 24;
  62         }
  63
  64         max_region =
  65                 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL, PF_MAX_REGION);
  66
  67
  68         switch (adev->asic_type) {
  69         case CHIP_VEGA20:
  70                 max_num_physical_nodes   = 4;
  71                 max_physical_node_id     = 3;
  72                 break;
  73         case CHIP_ARCTURUS:
  74                 max_num_physical_nodes   = 8;
  75                 max_physical_node_id     = 7;
  76                 break;
  77         case CHIP_ALDEBARAN:
  78                 /* just using duplicates for Aldebaran support, revisit later */
  79                 max_num_physical_nodes   = 8;
  80                 max_physical_node_id     = 7;
  81                 break;
  82         default:
  83                 return -EINVAL;
  84         }
  85
  86         /* PF_MAX_REGION=0 means xgmi is disabled */
  87         if (max_region || adev->gmc.xgmi.connected_to_cpu) {
  88                 adev->gmc.xgmi.num_physical_nodes = max_region + 1;
  89
  90                 if (adev->gmc.xgmi.num_physical_nodes > max_num_physical_nodes)
  91                         return -EINVAL;
  92
  93                 adev->gmc.xgmi.physical_node_id =
  94                 REG_GET_FIELD(xgmi_lfb_cntl, MC_VM_XGMI_LFB_CNTL,
  95                               PF_LFB_REGION);
  96
  97                 if (adev->gmc.xgmi.physical_node_id > max_physical_node_id)
  98                         return -EINVAL;
  99
 100                 adev->gmc.xgmi.node_segment_size = seg_size;
 101         }
 102
 103         return 0;
 104 }