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 pointer
  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_reroute_ih - reroute VMC/UTCL2 ih to an ih ring
 253  *
 254  * @adev: amdgpu_device pointer
 255  *
 256  * Reroute VMC and UMC interrupts on primary ih ring to
 257  * ih ring 1 so they won't lose when bunches of page faults
 258  * interrupts overwhelms the interrupt handler(VEGA20)
 259  */
 260 static void vega20_ih_reroute_ih(struct amdgpu_device *adev)
 261 {
 262         uint32_t tmp;
 263
 264         /* vega20 ih reroute will go through psp
 265          * this function is only used for arcturus
 266          */
 267         if (adev->asic_type == CHIP_ARCTURUS) {
 268                 /* Reroute to IH ring 1 for VMC */
 269                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x12);
 270                 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
 271                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, CLIENT_TYPE, 1);
 272                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
 273                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
 274
 275                 /* Reroute IH ring 1 for UTCL2 */
 276                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x1B);
 277                 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
 278                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
 279                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
 280         }
 281 }
 282
 283 /**
 284  * vega20_ih_irq_init - init and enable the interrupt ring
 285  *
 286  * @adev: amdgpu_device pointer
 287  *
 288  * Allocate a ring buffer for the interrupt controller,
 289  * enable the RLC, disable interrupts, enable the IH
 290  * ring buffer and enable it (VI).
 291  * Called at device load and reume.
 292  * Returns 0 for success, errors for failure.
 293  */
 294 static int vega20_ih_irq_init(struct amdgpu_device *adev)
 295 {
 296         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 297         u32 ih_chicken;
 298         int ret;
 299         int i;
 300         u32 tmp;
 301
 302         /* disable irqs */
 303         ret = vega20_ih_toggle_interrupts(adev, false);
 304         if (ret)
 305                 return ret;
 306
 307         adev->nbio.funcs->ih_control(adev);
 308
 309         if (adev->asic_type == CHIP_ARCTURUS &&
 310             adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 311                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
 312                 if (adev->irq.ih.use_bus_addr) {
 313                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 314                                                    MC_SPACE_GPA_ENABLE, 1);
 315                 }
 316                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 317         }
 318
 319         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 320                 if (ih[i]->ring_size) {
 321                         if (i == 1)
 322                                 vega20_ih_reroute_ih(adev);
 323                         ret = vega20_ih_enable_ring(adev, ih[i]);
 324                         if (ret)
 325                                 return ret;
 326                 }
 327         }
 328
 329         tmp = RREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL);
 330         tmp = REG_SET_FIELD(tmp, IH_STORM_CLIENT_LIST_CNTL,
 331                             CLIENT18_IS_STORM_CLIENT, 1);
 332         WREG32_SOC15(OSSSYS, 0, mmIH_STORM_CLIENT_LIST_CNTL, tmp);
 333
 334         tmp = RREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL);
 335         tmp = REG_SET_FIELD(tmp, IH_INT_FLOOD_CNTL, FLOOD_CNTL_ENABLE, 1);
 336         WREG32_SOC15(OSSSYS, 0, mmIH_INT_FLOOD_CNTL, tmp);
 337
 338         pci_set_master(adev->pdev);
 339
 340         /* enable interrupts */
 341         ret = vega20_ih_toggle_interrupts(adev, true);
 342         if (ret)
 343                 return ret;
 344
 345         if (adev->irq.ih_soft.ring_size)
 346                 adev->irq.ih_soft.enabled = true;
 347
 348         return 0;
 349 }
 350
 351 /**
 352  * vega20_ih_irq_disable - disable interrupts
 353  *
 354  * @adev: amdgpu_device pointer
 355  *
 356  * Disable interrupts on the hw (VEGA20).
 357  */
 358 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 359 {
 360         vega20_ih_toggle_interrupts(adev, false);
 361
 362         /* Wait and acknowledge irq */
 363         mdelay(1);
 364 }
 365
 366 /**
 367  * vega20_ih_get_wptr - get the IH ring buffer wptr
 368  *
 369  * @adev: amdgpu_device pointer
 370  * @ih: amdgpu_ih_ring pointer
 371  *
 372  * Get the IH ring buffer wptr from either the register
 373  * or the writeback memory buffer (VEGA20).  Also check for
 374  * ring buffer overflow and deal with it.
 375  * Returns the value of the wptr.
 376  */
 377 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 378                               struct amdgpu_ih_ring *ih)
 379 {
 380         u32 wptr, tmp;
 381         struct amdgpu_ih_regs *ih_regs;
 382
 383         wptr = le32_to_cpu(*ih->wptr_cpu);
 384         ih_regs = &ih->ih_regs;
 385
 386         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 387                 goto out;
 388
 389         /* Double check that the overflow wasn't already cleared. */
 390         wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 391         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 392                 goto out;
 393
 394         wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 395
 396         /* When a ring buffer overflow happen start parsing interrupt
 397          * from the last not overwritten vector (wptr + 32). Hopefully
 398          * this should allow us to catchup.
 399          */
 400         tmp = (wptr + 32) & ih->ptr_mask;
 401         dev_warn(adev->dev, "IH ring buffer overflow "
 402                  "(0x%08X, 0x%08X, 0x%08X)\n",
 403                  wptr, ih->rptr, tmp);
 404         ih->rptr = tmp;
 405
 406         tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 407         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 408         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 409
 410 out:
 411         return (wptr & ih->ptr_mask);
 412 }
 413
 414 /**
 415  * vega20_ih_irq_rearm - rearm IRQ if lost
 416  *
 417  * @adev: amdgpu_device pointer
 418  * @ih: amdgpu_ih_ring pointer
 419  *
 420  */
 421 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 422                                struct amdgpu_ih_ring *ih)
 423 {
 424         uint32_t v = 0;
 425         uint32_t i = 0;
 426         struct amdgpu_ih_regs *ih_regs;
 427
 428         ih_regs = &ih->ih_regs;
 429
 430         /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 431         for (i = 0; i < MAX_REARM_RETRY; i++) {
 432                 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 433                 if ((v < ih->ring_size) && (v != ih->rptr))
 434                         WDOORBELL32(ih->doorbell_index, ih->rptr);
 435                 else
 436                         break;
 437         }
 438 }
 439
 440 /**
 441  * vega20_ih_set_rptr - set the IH ring buffer rptr
 442  *
 443  * @adev: amdgpu_device pointer
 444  * @ih: amdgpu_ih_ring pointer
 445  *
 446  * Set the IH ring buffer rptr.
 447  */
 448 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 449                                struct amdgpu_ih_ring *ih)
 450 {
 451         struct amdgpu_ih_regs *ih_regs;
 452
 453         if (ih->use_doorbell) {
 454                 /* XXX check if swapping is necessary on BE */
 455                 *ih->rptr_cpu = ih->rptr;
 456                 WDOORBELL32(ih->doorbell_index, ih->rptr);
 457
 458                 if (amdgpu_sriov_vf(adev))
 459                         vega20_ih_irq_rearm(adev, ih);
 460         } else {
 461                 ih_regs = &ih->ih_regs;
 462                 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 463         }
 464 }
 465
 466 /**
 467  * vega20_ih_self_irq - dispatch work for ring 1 and 2
 468  *
 469  * @adev: amdgpu_device pointer
 470  * @source: irq source
 471  * @entry: IV with WPTR update
 472  *
 473  * Update the WPTR from the IV and schedule work to handle the entries.
 474  */
 475 static int vega20_ih_self_irq(struct amdgpu_device *adev,
 476                               struct amdgpu_irq_src *source,
 477                               struct amdgpu_iv_entry *entry)
 478 {
 479         uint32_t wptr = cpu_to_le32(entry->src_data[0]);
 480
 481         switch (entry->ring_id) {
 482         case 1:
 483                 *adev->irq.ih1.wptr_cpu = wptr;
 484                 schedule_work(&adev->irq.ih1_work);
 485                 break;
 486         case 2:
 487                 *adev->irq.ih2.wptr_cpu = wptr;
 488                 schedule_work(&adev->irq.ih2_work);
 489                 break;
 490         default: break;
 491         }
 492         return 0;
 493 }
 494
 495 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 496         .process = vega20_ih_self_irq,
 497 };
 498
 499 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 500 {
 501         adev->irq.self_irq.num_types = 0;
 502         adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 503 }
 504
 505 static int vega20_ih_early_init(void *handle)
 506 {
 507         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 508
 509         vega20_ih_set_interrupt_funcs(adev);
 510         vega20_ih_set_self_irq_funcs(adev);
 511         return 0;
 512 }
 513
 514 static int vega20_ih_sw_init(void *handle)
 515 {
 516         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 517         int r;
 518
 519         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 520                               &adev->irq.self_irq);
 521         if (r)
 522                 return r;
 523
 524         r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
 525         if (r)
 526                 return r;
 527
 528         adev->irq.ih.use_doorbell = true;
 529         adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 530
 531         r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
 532         if (r)
 533                 return r;
 534
 535         adev->irq.ih1.use_doorbell = true;
 536         adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 537
 538         r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 539         if (r)
 540                 return r;
 541
 542         adev->irq.ih2.use_doorbell = true;
 543         adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 544
 545         /* initialize ih control registers offset */
 546         vega20_ih_init_register_offset(adev);
 547
 548         r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, PAGE_SIZE, true);
 549         if (r)
 550                 return r;
 551
 552         r = amdgpu_irq_init(adev);
 553
 554         return r;
 555 }
 556
 557 static int vega20_ih_sw_fini(void *handle)
 558 {
 559         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 560
 561         amdgpu_irq_fini(adev);
 562         amdgpu_ih_ring_fini(adev, &adev->irq.ih_soft);
 563         amdgpu_ih_ring_fini(adev, &adev->irq.ih2);
 564         amdgpu_ih_ring_fini(adev, &adev->irq.ih1);
 565         amdgpu_ih_ring_fini(adev, &adev->irq.ih);
 566
 567         return 0;
 568 }
 569
 570 static int vega20_ih_hw_init(void *handle)
 571 {
 572         int r;
 573         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 574
 575         r = vega20_ih_irq_init(adev);
 576         if (r)
 577                 return r;
 578
 579         return 0;
 580 }
 581
 582 static int vega20_ih_hw_fini(void *handle)
 583 {
 584         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 585
 586         vega20_ih_irq_disable(adev);
 587
 588         return 0;
 589 }
 590
 591 static int vega20_ih_suspend(void *handle)
 592 {
 593         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 594
 595         return vega20_ih_hw_fini(adev);
 596 }
 597
 598 static int vega20_ih_resume(void *handle)
 599 {
 600         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 601
 602         return vega20_ih_hw_init(adev);
 603 }
 604
 605 static bool vega20_ih_is_idle(void *handle)
 606 {
 607         /* todo */
 608         return true;
 609 }
 610
 611 static int vega20_ih_wait_for_idle(void *handle)
 612 {
 613         /* todo */
 614         return -ETIMEDOUT;
 615 }
 616
 617 static int vega20_ih_soft_reset(void *handle)
 618 {
 619         /* todo */
 620
 621         return 0;
 622 }
 623
 624 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 625                                                bool enable)
 626 {
 627         uint32_t data, def, field_val;
 628
 629         if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 630                 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 631                 field_val = enable ? 0 : 1;
 632                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 633                                      IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 634                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 635                                      IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 636                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 637                                      DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 638                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 639                                      OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 640                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 641                                      LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 642                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 643                                      DYN_CLK_SOFT_OVERRIDE, field_val);
 644                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 645                                      REG_CLK_SOFT_OVERRIDE, field_val);
 646                 if (def != data)
 647                         WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 648         }
 649 }
 650
 651 static int vega20_ih_set_clockgating_state(void *handle,
 652                                           enum amd_clockgating_state state)
 653 {
 654         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 655
 656         vega20_ih_update_clockgating_state(adev,
 657                                 state == AMD_CG_STATE_GATE);
 658         return 0;
 659
 660 }
 661
 662 static int vega20_ih_set_powergating_state(void *handle,
 663                                           enum amd_powergating_state state)
 664 {
 665         return 0;
 666 }
 667
 668 const struct amd_ip_funcs vega20_ih_ip_funcs = {
 669         .name = "vega20_ih",
 670         .early_init = vega20_ih_early_init,
 671         .late_init = NULL,
 672         .sw_init = vega20_ih_sw_init,
 673         .sw_fini = vega20_ih_sw_fini,
 674         .hw_init = vega20_ih_hw_init,
 675         .hw_fini = vega20_ih_hw_fini,
 676         .suspend = vega20_ih_suspend,
 677         .resume = vega20_ih_resume,
 678         .is_idle = vega20_ih_is_idle,
 679         .wait_for_idle = vega20_ih_wait_for_idle,
 680         .soft_reset = vega20_ih_soft_reset,
 681         .set_clockgating_state = vega20_ih_set_clockgating_state,
 682         .set_powergating_state = vega20_ih_set_powergating_state,
 683 };
 684
 685 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 686         .get_wptr = vega20_ih_get_wptr,
 687         .decode_iv = amdgpu_ih_decode_iv_helper,
 688         .set_rptr = vega20_ih_set_rptr
 689 };
 690
 691 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 692 {
 693         adev->irq.ih_funcs = &vega20_ih_funcs;
 694 }
 695
 696 const struct amdgpu_ip_block_version vega20_ih_ip_block =
 697 {
 698         .type = AMD_IP_BLOCK_TYPE_IH,
 699         .major = 4,
 700         .minor = 2,
 701         .rev = 0,
 702         .funcs = &vega20_ih_ip_funcs,
 703 };