drivers/gpu/drm/amd/amdgpu/vega20_ih.c

   1 /*
   2  * Copyright 2020 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 <linux/pci.h>
  25
  26 #include "amdgpu.h"
  27 #include "amdgpu_ih.h"
  28 #include "soc15.h"
  29
  30 #include "oss/osssys_4_2_0_offset.h"
  31 #include "oss/osssys_4_2_0_sh_mask.h"
  32
  33 #include "soc15_common.h"
  34 #include "vega20_ih.h"
  35
  36 #define MAX_REARM_RETRY 10
  37
  38 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev);
  39
  40 /**
  41  * vega20_ih_init_register_offset - Initialize register offset for ih rings
  42  *
  43  * @adev: amdgpu_device pointer
  44  *
  45  * Initialize register offset ih rings (VEGA20).
  46  */
  47 static void vega20_ih_init_register_offset(struct amdgpu_device *adev)
  48 {
  49         struct amdgpu_ih_regs *ih_regs;
  50
  51         if (adev->irq.ih.ring_size) {
  52                 ih_regs = &adev->irq.ih.ih_regs;
  53                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
  54                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
  55                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
  56                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
  57                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
  58                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
  59                 ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
  60                 ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
  61                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
  62         }
  63
  64         if (adev->irq.ih1.ring_size) {
  65                 ih_regs = &adev->irq.ih1.ih_regs;
  66                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
  67                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
  68                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
  69                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
  70                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
  71                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
  72                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
  73         }
  74
  75         if (adev->irq.ih2.ring_size) {
  76                 ih_regs = &adev->irq.ih2.ih_regs;
  77                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
  78                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
  79                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
  80                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
  81                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
  82                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
  83                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
  84         }
  85 }
  86
  87 /**
  88  * vega20_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
  89  *
  90  * @adev: amdgpu_device pointer
  91  * @ih: amdgpu_ih_ring pointet
  92  * @enable: true - enable the interrupts, false - disable the interrupts
  93  *
  94  * Toggle the interrupt ring buffer (VEGA20)
  95  */
  96 static int vega20_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
  97                                             struct amdgpu_ih_ring *ih,
  98                                             bool enable)
  99 {
 100         struct amdgpu_ih_regs *ih_regs;
 101         uint32_t tmp;
 102
 103         ih_regs = &ih->ih_regs;
 104
 105         tmp = RREG32(ih_regs->ih_rb_cntl);
 106         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
 107         /* enable_intr field is only valid in ring0 */
 108         if (ih == &adev->irq.ih)
 109                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
 110         if (amdgpu_sriov_vf(adev)) {
 111                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 112                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 113                         return -ETIMEDOUT;
 114                 }
 115         } else {
 116                 WREG32(ih_regs->ih_rb_cntl, tmp);
 117         }
 118
 119         if (enable) {
 120                 ih->enabled = true;
 121         } else {
 122                 /* set rptr, wptr to 0 */
 123                 WREG32(ih_regs->ih_rb_rptr, 0);
 124                 WREG32(ih_regs->ih_rb_wptr, 0);
 125                 ih->enabled = false;
 126                 ih->rptr = 0;
 127         }
 128
 129         return 0;
 130 }
 131
 132 /**
 133  * vega20_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
 134  *
 135  * @adev: amdgpu_device pointer
 136  * @enable: enable or disable interrupt ring buffers
 137  *
 138  * Toggle all the available interrupt ring buffers (VEGA20).
 139  */
 140 static int vega20_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
 141 {
 142         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 143         int i;
 144         int r;
 145
 146         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 147                 if (ih[i]->ring_size) {
 148                         r = vega20_ih_toggle_ring_interrupts(adev, ih[i], enable);
 149                         if (r)
 150                                 return r;
 151                 }
 152         }
 153
 154         return 0;
 155 }
 156
 157 static uint32_t vega20_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
 158 {
 159         int rb_bufsz = order_base_2(ih->ring_size / 4);
 160
 161         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 162                                    MC_SPACE, ih->use_bus_addr ? 1 : 4);
 163         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 164                                    WPTR_OVERFLOW_CLEAR, 1);
 165         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 166                                    WPTR_OVERFLOW_ENABLE, 1);
 167         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
 168         /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
 169          * value is written to memory
 170          */
 171         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 172                                    WPTR_WRITEBACK_ENABLE, 1);
 173         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
 174         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
 175         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
 176
 177         return ih_rb_cntl;
 178 }
 179
 180 static uint32_t vega20_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
 181 {
 182         u32 ih_doorbell_rtpr = 0;
 183
 184         if (ih->use_doorbell) {
 185                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 186                                                  IH_DOORBELL_RPTR, OFFSET,
 187                                                  ih->doorbell_index);
 188                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 189                                                  IH_DOORBELL_RPTR,
 190                                                  ENABLE, 1);
 191         } else {
 192                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 193                                                  IH_DOORBELL_RPTR,
 194                                                  ENABLE, 0);
 195         }
 196         return ih_doorbell_rtpr;
 197 }
 198
 199 /**
 200  * vega20_ih_enable_ring - enable an ih ring buffer
 201  *
 202  * @adev: amdgpu_device pointer
 203  * @ih: amdgpu_ih_ring pointer
 204  *
 205  * Enable an ih ring buffer (VEGA20)
 206  */
 207 static int vega20_ih_enable_ring(struct amdgpu_device *adev,
 208                                  struct amdgpu_ih_ring *ih)
 209 {
 210         struct amdgpu_ih_regs *ih_regs;
 211         uint32_t tmp;
 212
 213         ih_regs = &ih->ih_regs;
 214
 215         /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
 216         WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
 217         WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
 218
 219         tmp = RREG32(ih_regs->ih_rb_cntl);
 220         tmp = vega20_ih_rb_cntl(ih, tmp);
 221         if (ih == &adev->irq.ih)
 222                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
 223         if (ih == &adev->irq.ih1) {
 224                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_ENABLE, 0);
 225                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
 226         }
 227         if (amdgpu_sriov_vf(adev)) {
 228                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 229                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 230                         return -ETIMEDOUT;
 231                 }
 232         } else {
 233                 WREG32(ih_regs->ih_rb_cntl, tmp);
 234         }
 235
 236         if (ih == &adev->irq.ih) {
 237                 /* set the ih ring 0 writeback address whether it's enabled or not */
 238                 WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
 239                 WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
 240         }
 241
 242         /* set rptr, wptr to 0 */
 243         WREG32(ih_regs->ih_rb_wptr, 0);
 244         WREG32(ih_regs->ih_rb_rptr, 0);
 245
 246         WREG32(ih_regs->ih_doorbell_rptr, vega20_ih_doorbell_rptr(ih));
 247
 248         return 0;
 249 }
 250
 251 /**
 252  * vega20_ih_irq_init - init and enable the interrupt ring
 253  *
 254  * @adev: amdgpu_device pointer
 255  *
 256  * Allocate a ring buffer for the interrupt controller,
 257  * enable the RLC, disable interrupts, enable the IH
 258  * ring buffer and enable it (VI).
 259  * Called at device load and reume.
 260  * Returns 0 for success, errors for failure.
 261  */
 262 static int vega20_ih_irq_init(struct amdgpu_device *adev)
 263 {
 264         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 265         u32 ih_chicken;
 266         int ret;
 267         int i;
 268         u32 tmp;
 269
 270         /* disable irqs */
 271         ret = vega20_ih_toggle_interrupts(adev, false);
 272         if (ret)
 273                 return ret;
 274
 275         adev->nbio.funcs->ih_control(adev);
 276
 277         if (adev->asic_type == CHIP_ARCTURUS &&
 278             adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 279                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
 280                 if (adev->irq.ih.use_bus_addr) {
 281                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 282                                                    MC_SPACE_GPA_ENABLE, 1);
 283                 } else {
 284                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 285                                                    MC_SPACE_FBPA_ENABLE, 1);
 286                 }
 287                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 288         }
 289
 290         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 291                 if (ih[i]->ring_size) {
 292                         ret = vega20_ih_enable_ring(adev, ih[i]);
 293                         if (ret)
 294                                 return ret;
 295                 }
 296         }
 297
 298         tmp = RREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL);
 299         tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL,
 300                             CLIENT18_IS_STORM_CLIENT, 1);
 301         WREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL, tmp);
 302
 303         tmp = RREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL);
 304         tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1);
 305         WREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL, tmp);
 306
 307         pci_set_master(adev->pdev);
 308
 309         /* enable interrupts */
 310         ret = vega20_ih_toggle_interrupts(adev, true);
 311         if (ret)
 312                 return ret;
 313
 314         return 0;
 315 }
 316
 317 /**
 318  * vega20_ih_irq_disable - disable interrupts
 319  *
 320  * @adev: amdgpu_device pointer
 321  *
 322  * Disable interrupts on the hw (VEGA20).
 323  */
 324 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 325 {
 326         vega20_ih_toggle_interrupts(adev, false);
 327
 328         /* Wait and acknowledge irq */
 329         mdelay(1);
 330 }
 331
 332 /**
 333  * vega20_ih_get_wptr - get the IH ring buffer wptr
 334  *
 335  * @adev: amdgpu_device pointer
 336  *
 337  * Get the IH ring buffer wptr from either the register
 338  * or the writeback memory buffer (VEGA20).  Also check for
 339  * ring buffer overflow and deal with it.
 340  * Returns the value of the wptr.
 341  */
 342 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 343                               struct amdgpu_ih_ring *ih)
 344 {
 345         u32 wptr, tmp;
 346         struct amdgpu_ih_regs *ih_regs;
 347
 348         wptr = le32_to_cpu(*ih->wptr_cpu);
 349         ih_regs = &ih->ih_regs;
 350
 351         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 352                 goto out;
 353
 354         /* Double check that the overflow wasn't already cleared. */
 355         wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 356         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 357                 goto out;
 358
 359         wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 360
 361         /* When a ring buffer overflow happen start parsing interrupt
 362          * from the last not overwritten vector (wptr + 32). Hopefully
 363          * this should allow us to catchup.
 364          */
 365         tmp = (wptr + 32) & ih->ptr_mask;
 366         dev_warn(adev->dev, "IH ring buffer overflow "
 367                  "(0x%08X, 0x%08X, 0x%08X)\n",
 368                  wptr, ih->rptr, tmp);
 369         ih->rptr = tmp;
 370
 371         tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 372         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 373         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 374
 375 out:
 376         return (wptr & ih->ptr_mask);
 377 }
 378
 379 /**
 380  * vega20_ih_irq_rearm - rearm IRQ if lost
 381  *
 382  * @adev: amdgpu_device pointer
 383  *
 384  */
 385 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 386                                struct amdgpu_ih_ring *ih)
 387 {
 388         uint32_t v = 0;
 389         uint32_t i = 0;
 390         struct amdgpu_ih_regs *ih_regs;
 391
 392         ih_regs = &ih->ih_regs;
 393
 394         /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 395         for (i = 0; i < MAX_REARM_RETRY; i++) {
 396                 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 397                 if ((v < ih->ring_size) && (v != ih->rptr))
 398                         WDOORBELL32(ih->doorbell_index, ih->rptr);
 399                 else
 400                         break;
 401         }
 402 }
 403
 404 /**
 405  * vega20_ih_set_rptr - set the IH ring buffer rptr
 406  *
 407  * @adev: amdgpu_device pointer
 408  *
 409  * Set the IH ring buffer rptr.
 410  */
 411 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 412                                struct amdgpu_ih_ring *ih)
 413 {
 414         struct amdgpu_ih_regs *ih_regs;
 415
 416         if (ih->use_doorbell) {
 417                 /* XXX check if swapping is necessary on BE */
 418                 *ih->rptr_cpu = ih->rptr;
 419                 WDOORBELL32(ih->doorbell_index, ih->rptr);
 420
 421                 if (amdgpu_sriov_vf(adev))
 422                         vega20_ih_irq_rearm(adev, ih);
 423         } else {
 424                 ih_regs = &ih->ih_regs;
 425                 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 426         }
 427 }
 428
 429 /**
 430  * vega20_ih_self_irq - dispatch work for ring 1 and 2
 431  *
 432  * @adev: amdgpu_device pointer
 433  * @source: irq source
 434  * @entry: IV with WPTR update
 435  *
 436  * Update the WPTR from the IV and schedule work to handle the entries.
 437  */
 438 static int vega20_ih_self_irq(struct amdgpu_device *adev,
 439                               struct amdgpu_irq_src *source,
 440                               struct amdgpu_iv_entry *entry)
 441 {
 442         uint32_t wptr = cpu_to_le32(entry->src_data[0]);
 443
 444         switch (entry->ring_id) {
 445         case 1:
 446                 *adev->irq.ih1.wptr_cpu = wptr;
 447                 schedule_work(&adev->irq.ih1_work);
 448                 break;
 449         case 2:
 450                 *adev->irq.ih2.wptr_cpu = wptr;
 451                 schedule_work(&adev->irq.ih2_work);
 452                 break;
 453         default: break;
 454         }
 455         return 0;
 456 }
 457
 458 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 459         .process = vega20_ih_self_irq,
 460 };
 461
 462 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 463 {
 464         adev->irq.self_irq.num_types = 0;
 465         adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 466 }
 467
 468 static int vega20_ih_early_init(void *handle)
 469 {
 470         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 471
 472         vega20_ih_set_interrupt_funcs(adev);
 473         vega20_ih_set_self_irq_funcs(adev);
 474         return 0;
 475 }
 476
 477 static int vega20_ih_sw_init(void *handle)
 478 {
 479         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 480         int r;
 481
 482         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 483                               &adev->irq.self_irq);
 484         if (r)
 485                 return r;
 486
 487         r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
 488         if (r)
 489                 return r;
 490
 491         adev->irq.ih.use_doorbell = true;
 492         adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 493
 494         r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
 495         if (r)
 496                 return r;
 497
 498         adev->irq.ih1.use_doorbell = true;
 499         adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 500
 501         r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 502         if (r)
 503                 return r;
 504
 505         adev->irq.ih2.use_doorbell = true;
 506         adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 507
 508         /* initialize ih control registers offset */
 509         vega20_ih_init_register_offset(adev);
 510
 511         r = amdgpu_irq_init(adev);
 512
 513         return r;
 514 }
 515
 516 static int vega20_ih_sw_fini(void *handle)
 517 {
 518         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 519
 520         amdgpu_irq_fini(adev);
 521         amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
 522         amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
 523         amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 524
 525         return 0;
 526 }
 527
 528 static int vega20_ih_hw_init(void *handle)
 529 {
 530         int r;
 531         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 532
 533         r = vega20_ih_irq_init(adev);
 534         if (r)
 535                 return r;
 536
 537         return 0;
 538 }
 539
 540 static int vega20_ih_hw_fini(void *handle)
 541 {
 542         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 543
 544         vega20_ih_irq_disable(adev);
 545
 546         return 0;
 547 }
 548
 549 static int vega20_ih_suspend(void *handle)
 550 {
 551         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 552
 553         return vega20_ih_hw_fini(adev);
 554 }
 555
 556 static int vega20_ih_resume(void *handle)
 557 {
 558         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 559
 560         return vega20_ih_hw_init(adev);
 561 }
 562
 563 static bool vega20_ih_is_idle(void *handle)
 564 {
 565         /* todo */
 566         return true;
 567 }
 568
 569 static int vega20_ih_wait_for_idle(void *handle)
 570 {
 571         /* todo */
 572         return -ETIMEDOUT;
 573 }
 574
 575 static int vega20_ih_soft_reset(void *handle)
 576 {
 577         /* todo */
 578
 579         return 0;
 580 }
 581
 582 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 583                                                bool enable)
 584 {
 585         uint32_t data, def, field_val;
 586
 587         if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 588                 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 589                 field_val = enable ? 0 : 1;
 590                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 591                                      IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 592                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 593                                      IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 594                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 595                                      DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 596                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 597                                      OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 598                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 599                                      LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 600                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 601                                      DYN_CLK_SOFT_OVERRIDE, field_val);
 602                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 603                                      REG_CLK_SOFT_OVERRIDE, field_val);
 604                 if (def != data)
 605                         WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 606         }
 607 }
 608
 609 static int vega20_ih_set_clockgating_state(void *handle,
 610                                           enum amd_clockgating_state state)
 611 {
 612         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 613
 614         vega20_ih_update_clockgating_state(adev,
 615                                 state == AMD_CG_STATE_GATE);
 616         return 0;
 617
 618 }
 619
 620 static int vega20_ih_set_powergating_state(void *handle,
 621                                           enum amd_powergating_state state)
 622 {
 623         return 0;
 624 }
 625
 626 const struct amd_ip_funcs vega20_ih_ip_funcs = {
 627         .name = "vega20_ih",
 628         .early_init = vega20_ih_early_init,
 629         .late_init = NULL,
 630         .sw_init = vega20_ih_sw_init,
 631         .sw_fini = vega20_ih_sw_fini,
 632         .hw_init = vega20_ih_hw_init,
 633         .hw_fini = vega20_ih_hw_fini,
 634         .suspend = vega20_ih_suspend,
 635         .resume = vega20_ih_resume,
 636         .is_idle = vega20_ih_is_idle,
 637         .wait_for_idle = vega20_ih_wait_for_idle,
 638         .soft_reset = vega20_ih_soft_reset,
 639         .set_clockgating_state = vega20_ih_set_clockgating_state,
 640         .set_powergating_state = vega20_ih_set_powergating_state,
 641 };
 642
 643 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 644         .get_wptr = vega20_ih_get_wptr,
 645         .decode_iv = amdgpu_ih_decode_iv_helper,
 646         .set_rptr = vega20_ih_set_rptr
 647 };
 648
 649 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 650 {
 651         adev->irq.ih_funcs = &vega20_ih_funcs;
 652 }
 653
 654 const struct amdgpu_ip_block_version vega20_ih_ip_block =
 655 {
 656         .type = AMD_IP_BLOCK_TYPE_IH,
 657         .major = 4,
 658         .minor = 2,
 659         .rev = 0,
 660         .funcs = &vega20_ih_ip_funcs,
 661 };