drivers/gpu/drm/amd/amdgpu/gfxhub_v2_0.c

   1 /*
   2  * Copyright 2019 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
  24 #include "amdgpu.h"
  25 #include "gfxhub_v2_0.h"
  26
  27 #include "gc/gc_10_1_0_offset.h"
  28 #include "gc/gc_10_1_0_sh_mask.h"
  29 #include "gc/gc_10_1_0_default.h"
  30 #include "navi10_enum.h"
  31
  32 #include "soc15_common.h"
  33
  34 u64 gfxhub_v2_0_get_fb_location(struct amdgpu_device *adev)
  35 {
  36         u64 base = RREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_BASE);
  37
  38         base &= GCMC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
  39         base <<= 24;
  40
  41         return base;
  42 }
  43
  44 u64 gfxhub_v2_0_get_mc_fb_offset(struct amdgpu_device *adev)
  45 {
  46         return (u64)RREG32_SOC15(GC, 0, mmGCMC_VM_FB_OFFSET) << 24;
  47 }
  48
  49 void gfxhub_v2_0_setup_vm_pt_regs(struct amdgpu_device *adev, uint32_t vmid,
  50                                 uint64_t page_table_base)
  51 {
  52         /* two registers distance between mmGCVM_CONTEXT0_* to mmGCVM_CONTEXT1_* */
  53         int offset = mmGCVM_CONTEXT1_PAGE_TABLE_BASE_ADDR_LO32
  54                         - mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32;
  55
  56         WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32,
  57                                 offset * vmid, lower_32_bits(page_table_base));
  58
  59         WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32,
  60                                 offset * vmid, upper_32_bits(page_table_base));
  61 }
  62
  63 static void gfxhub_v2_0_init_gart_aperture_regs(struct amdgpu_device *adev)
  64 {
  65         uint64_t pt_base = amdgpu_gmc_pd_addr(adev->gart.bo);
  66
  67         gfxhub_v2_0_setup_vm_pt_regs(adev, 0, pt_base);
  68
  69         WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_LO32,
  70                      (u32)(adev->gmc.gart_start >> 12));
  71         WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_START_ADDR_HI32,
  72                      (u32)(adev->gmc.gart_start >> 44));
  73
  74         WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_LO32,
  75                      (u32)(adev->gmc.gart_end >> 12));
  76         WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_PAGE_TABLE_END_ADDR_HI32,
  77                      (u32)(adev->gmc.gart_end >> 44));
  78 }
  79
  80 static void gfxhub_v2_0_init_system_aperture_regs(struct amdgpu_device *adev)
  81 {
  82         uint64_t value;
  83
  84         /* Disable AGP. */
  85         WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BASE, 0);
  86         WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_TOP, 0);
  87         WREG32_SOC15(GC, 0, mmGCMC_VM_AGP_BOT, 0x00FFFFFF);
  88
  89         /* Program the system aperture low logical page number. */
  90         WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_LOW_ADDR,
  91                      adev->gmc.vram_start >> 18);
  92         WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_HIGH_ADDR,
  93                      adev->gmc.vram_end >> 18);
  94
  95         /* Set default page address. */
  96         value = adev->vram_scratch.gpu_addr - adev->gmc.vram_start
  97                 + adev->vm_manager.vram_base_offset;
  98         WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_LSB,
  99                      (u32)(value >> 12));
 100         WREG32_SOC15(GC, 0, mmGCMC_VM_SYSTEM_APERTURE_DEFAULT_ADDR_MSB,
 101                      (u32)(value >> 44));
 102
 103         /* Program "protection fault". */
 104         WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_LO32,
 105                      (u32)(adev->dummy_page_addr >> 12));
 106         WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_DEFAULT_ADDR_HI32,
 107                      (u32)((u64)adev->dummy_page_addr >> 44));
 108
 109         WREG32_FIELD15(GC, 0, GCVM_L2_PROTECTION_FAULT_CNTL2,
 110                        ACTIVE_PAGE_MIGRATION_PTE_READ_RETRY, 1);
 111 }
 112
 113
 114 static void gfxhub_v2_0_init_tlb_regs(struct amdgpu_device *adev)
 115 {
 116         uint32_t tmp;
 117
 118         /* Setup TLB control */
 119         tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);
 120
 121         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 1);
 122         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, SYSTEM_ACCESS_MODE, 3);
 123         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 124                             ENABLE_ADVANCED_DRIVER_MODEL, 1);
 125         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 126                             SYSTEM_APERTURE_UNMAPPED_ACCESS, 0);
 127         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ECO_BITS, 0);
 128         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 129                             MTYPE, MTYPE_UC); /* UC, uncached */
 130
 131         WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);
 132 }
 133
 134 static void gfxhub_v2_0_init_cache_regs(struct amdgpu_device *adev)
 135 {
 136         uint32_t tmp;
 137
 138         /* Setup L2 cache */
 139         tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL);
 140         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_CACHE, 1);
 141         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, ENABLE_L2_FRAGMENT_PROCESSING, 0);
 142         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
 143                             ENABLE_DEFAULT_PAGE_OUT_TO_SYSTEM_MEMORY, 1);
 144         /* XXX for emulation, Refer to closed source code.*/
 145         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL,
 146                             L2_PDE0_CACHE_TAG_GENERATION_MODE, 0);
 147         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, PDE_FAULT_CLASSIFICATION, 0);
 148         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, CONTEXT1_IDENTITY_ACCESS_MODE, 1);
 149         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL, IDENTITY_MODE_FRAGMENT_SIZE, 0);
 150         WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL, tmp);
 151
 152         tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2);
 153         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_ALL_L1_TLBS, 1);
 154         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL2, INVALIDATE_L2_CACHE, 1);
 155         WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL2, tmp);
 156
 157         tmp = mmGCVM_L2_CNTL3_DEFAULT;
 158         if (adev->gmc.translate_further) {
 159                 tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL3, BANK_SELECT, 12);
 160                 tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL3,
 161                                     L2_CACHE_BIGK_FRAGMENT_SIZE, 9);
 162         } else {
 163                 tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL3, BANK_SELECT, 9);
 164                 tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL3,
 165                                     L2_CACHE_BIGK_FRAGMENT_SIZE, 6);
 166         }
 167         WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, tmp);
 168
 169         tmp = mmGCVM_L2_CNTL4_DEFAULT;
 170         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PDE_REQUEST_PHYSICAL, 0);
 171         tmp = REG_SET_FIELD(tmp, GCVM_L2_CNTL4, VMC_TAP_PTE_REQUEST_PHYSICAL, 0);
 172         WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL4, tmp);
 173 }
 174
 175 static void gfxhub_v2_0_enable_system_domain(struct amdgpu_device *adev)
 176 {
 177         uint32_t tmp;
 178
 179         tmp = RREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL);
 180         tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, ENABLE_CONTEXT, 1);
 181         tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL, PAGE_TABLE_DEPTH, 0);
 182         tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT0_CNTL,
 183                             RETRY_PERMISSION_OR_INVALID_PAGE_FAULT, 0);
 184         WREG32_SOC15(GC, 0, mmGCVM_CONTEXT0_CNTL, tmp);
 185 }
 186
 187 static void gfxhub_v2_0_disable_identity_aperture(struct amdgpu_device *adev)
 188 {
 189         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_LO32,
 190                      0xFFFFFFFF);
 191         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_LOW_ADDR_HI32,
 192                      0x0000000F);
 193
 194         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_LO32,
 195                      0);
 196         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT1_IDENTITY_APERTURE_HIGH_ADDR_HI32,
 197                      0);
 198
 199         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_LO32, 0);
 200         WREG32_SOC15(GC, 0, mmGCVM_L2_CONTEXT_IDENTITY_PHYSICAL_OFFSET_HI32, 0);
 201
 202 }
 203
 204 static void gfxhub_v2_0_setup_vmid_config(struct amdgpu_device *adev)
 205 {
 206         int i;
 207         uint32_t tmp;
 208
 209         for (i = 0; i <= 14; i++) {
 210                 tmp = RREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i);
 211                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, ENABLE_CONTEXT, 1);
 212                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL, PAGE_TABLE_DEPTH,
 213                                     adev->vm_manager.num_level);
 214                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 215                                 RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 216                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 217                                 DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 218                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 219                                 PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 220                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 221                                 VALID_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 222                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 223                                 READ_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 224                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 225                                 WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 226                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 227                                 EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, 1);
 228                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 229                                 PAGE_TABLE_BLOCK_SIZE,
 230                                 adev->vm_manager.block_size - 9);
 231                 /* Send no-retry XNACK on fault to suppress VM fault storm. */
 232                 tmp = REG_SET_FIELD(tmp, GCVM_CONTEXT1_CNTL,
 233                                     RETRY_PERMISSION_OR_INVALID_PAGE_FAULT,
 234                                     !amdgpu_noretry);
 235                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_CNTL, i, tmp);
 236                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_LO32, i*2, 0);
 237                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_START_ADDR_HI32, i*2, 0);
 238                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_LO32,  i*2,
 239                         lower_32_bits(adev->vm_manager.max_pfn - 1));
 240                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT1_PAGE_TABLE_END_ADDR_HI32, i*2,
 241                         upper_32_bits(adev->vm_manager.max_pfn - 1));
 242         }
 243 }
 244
 245 static void gfxhub_v2_0_program_invalidation(struct amdgpu_device *adev)
 246 {
 247         unsigned i;
 248
 249         for (i = 0 ; i < 18; ++i) {
 250                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_LO32,
 251                                     2 * i, 0xffffffff);
 252                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ADDR_RANGE_HI32,
 253                                     2 * i, 0x1f);
 254         }
 255 }
 256
 257 int gfxhub_v2_0_gart_enable(struct amdgpu_device *adev)
 258 {
 259         if (amdgpu_sriov_vf(adev)) {
 260                 /*
 261                  * GCMC_VM_FB_LOCATION_BASE/TOP is NULL for VF, becuase they are
 262                  * VF copy registers so vbios post doesn't program them, for
 263                  * SRIOV driver need to program them
 264                  */
 265                 WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_BASE,
 266                              adev->gmc.vram_start >> 24);
 267                 WREG32_SOC15(GC, 0, mmGCMC_VM_FB_LOCATION_TOP,
 268                              adev->gmc.vram_end >> 24);
 269         }
 270
 271         /* GART Enable. */
 272         gfxhub_v2_0_init_gart_aperture_regs(adev);
 273         gfxhub_v2_0_init_system_aperture_regs(adev);
 274         gfxhub_v2_0_init_tlb_regs(adev);
 275         gfxhub_v2_0_init_cache_regs(adev);
 276
 277         gfxhub_v2_0_enable_system_domain(adev);
 278         gfxhub_v2_0_disable_identity_aperture(adev);
 279         gfxhub_v2_0_setup_vmid_config(adev);
 280         gfxhub_v2_0_program_invalidation(adev);
 281
 282         return 0;
 283 }
 284
 285 void gfxhub_v2_0_gart_disable(struct amdgpu_device *adev)
 286 {
 287         u32 tmp;
 288         u32 i;
 289
 290         /* Disable all tables */
 291         for (i = 0; i < 16; i++)
 292                 WREG32_SOC15_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL, i, 0);
 293
 294         /* Setup TLB control */
 295         tmp = RREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL);
 296         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL, ENABLE_L1_TLB, 0);
 297         tmp = REG_SET_FIELD(tmp, GCMC_VM_MX_L1_TLB_CNTL,
 298                             ENABLE_ADVANCED_DRIVER_MODEL, 0);
 299         WREG32_SOC15(GC, 0, mmGCMC_VM_MX_L1_TLB_CNTL, tmp);
 300
 301         /* Setup L2 cache */
 302         WREG32_FIELD15(GC, 0, GCVM_L2_CNTL, ENABLE_L2_CACHE, 0);
 303         WREG32_SOC15(GC, 0, mmGCVM_L2_CNTL3, 0);
 304 }
 305
 306 /**
 307  * gfxhub_v2_0_set_fault_enable_default - update GART/VM fault handling
 308  *
 309  * @adev: amdgpu_device pointer
 310  * @value: true redirects VM faults to the default page
 311  */
 312 void gfxhub_v2_0_set_fault_enable_default(struct amdgpu_device *adev,
 313                                           bool value)
 314 {
 315         u32 tmp;
 316         tmp = RREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
 317         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 318                             RANGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 319         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 320                             PDE0_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 321         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 322                             PDE1_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 323         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 324                             PDE2_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 325         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 326                             TRANSLATE_FURTHER_PROTECTION_FAULT_ENABLE_DEFAULT,
 327                             value);
 328         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 329                             NACK_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 330         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 331                             DUMMY_PAGE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 332         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 333                             VALID_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 334         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 335                             READ_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 336         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 337                             WRITE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 338         tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 339                             EXECUTE_PROTECTION_FAULT_ENABLE_DEFAULT, value);
 340         if (!value) {
 341                 tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 342                                 CRASH_ON_NO_RETRY_FAULT, 1);
 343                 tmp = REG_SET_FIELD(tmp, GCVM_L2_PROTECTION_FAULT_CNTL,
 344                                 CRASH_ON_RETRY_FAULT, 1);
 345         }
 346         WREG32_SOC15(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL, tmp);
 347 }
 348
 349 void gfxhub_v2_0_init(struct amdgpu_device *adev)
 350 {
 351         struct amdgpu_vmhub *hub = &adev->vmhub[AMDGPU_GFXHUB_0];
 352
 353         hub->ctx0_ptb_addr_lo32 =
 354                 SOC15_REG_OFFSET(GC, 0,
 355                                  mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_LO32);
 356         hub->ctx0_ptb_addr_hi32 =
 357                 SOC15_REG_OFFSET(GC, 0,
 358                                  mmGCVM_CONTEXT0_PAGE_TABLE_BASE_ADDR_HI32);
 359         hub->vm_inv_eng0_req =
 360                 SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_REQ);
 361         hub->vm_inv_eng0_ack =
 362                 SOC15_REG_OFFSET(GC, 0, mmGCVM_INVALIDATE_ENG0_ACK);
 363         hub->vm_context0_cntl =
 364                 SOC15_REG_OFFSET(GC, 0, mmGCVM_CONTEXT0_CNTL);
 365         hub->vm_l2_pro_fault_status =
 366                 SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_STATUS);
 367         hub->vm_l2_pro_fault_cntl =
 368                 SOC15_REG_OFFSET(GC, 0, mmGCVM_L2_PROTECTION_FAULT_CNTL);
 369 }