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 #define mmIH_CHICKEN_ALDEBARAN                  0x18d
  39 #define mmIH_CHICKEN_ALDEBARAN_BASE_IDX         0
  40
  41 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev);
  42
  43 /**
  44  * vega20_ih_init_register_offset - Initialize register offset for ih rings
  45  *
  46  * @adev: amdgpu_device pointer
  47  *
  48  * Initialize register offset ih rings (VEGA20).
  49  */
  50 static void vega20_ih_init_register_offset(struct amdgpu_device *adev)
  51 {
  52         struct amdgpu_ih_regs *ih_regs;
  53
  54         if (adev->irq.ih.ring_size) {
  55                 ih_regs = &adev->irq.ih.ih_regs;
  56                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
  57                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
  58                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
  59                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
  60                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
  61                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
  62                 ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
  63                 ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
  64                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
  65         }
  66
  67         if (adev->irq.ih1.ring_size) {
  68                 ih_regs = &adev->irq.ih1.ih_regs;
  69                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
  70                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
  71                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
  72                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
  73                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
  74                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
  75                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
  76         }
  77
  78         if (adev->irq.ih2.ring_size) {
  79                 ih_regs = &adev->irq.ih2.ih_regs;
  80                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
  81                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
  82                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
  83                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
  84                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
  85                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
  86                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
  87         }
  88 }
  89
  90 /**
  91  * vega20_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
  92  *
  93  * @adev: amdgpu_device pointer
  94  * @ih: amdgpu_ih_ring pointer
  95  * @enable: true - enable the interrupts, false - disable the interrupts
  96  *
  97  * Toggle the interrupt ring buffer (VEGA20)
  98  */
  99 static int vega20_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
 100                                             struct amdgpu_ih_ring *ih,
 101                                             bool enable)
 102 {
 103         struct amdgpu_ih_regs *ih_regs;
 104         uint32_t tmp;
 105
 106         ih_regs = &ih->ih_regs;
 107
 108         tmp = RREG32(ih_regs->ih_rb_cntl);
 109         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
 110         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1);
 111
 112         /* enable_intr field is only valid in ring0 */
 113         if (ih == &adev->irq.ih)
 114                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
 115         if (amdgpu_sriov_vf(adev)) {
 116                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 117                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 118                         return -ETIMEDOUT;
 119                 }
 120         } else {
 121                 WREG32(ih_regs->ih_rb_cntl, tmp);
 122         }
 123
 124         if (enable) {
 125                 ih->enabled = true;
 126         } else {
 127                 /* set rptr, wptr to 0 */
 128                 WREG32(ih_regs->ih_rb_rptr, 0);
 129                 WREG32(ih_regs->ih_rb_wptr, 0);
 130                 ih->enabled = false;
 131                 ih->rptr = 0;
 132         }
 133
 134         return 0;
 135 }
 136
 137 /**
 138  * vega20_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
 139  *
 140  * @adev: amdgpu_device pointer
 141  * @enable: enable or disable interrupt ring buffers
 142  *
 143  * Toggle all the available interrupt ring buffers (VEGA20).
 144  */
 145 static int vega20_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
 146 {
 147         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 148         int i;
 149         int r;
 150
 151         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 152                 if (ih[i]->ring_size) {
 153                         r = vega20_ih_toggle_ring_interrupts(adev, ih[i], enable);
 154                         if (r)
 155                                 return r;
 156                 }
 157         }
 158
 159         return 0;
 160 }
 161
 162 static uint32_t vega20_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
 163 {
 164         int rb_bufsz = order_base_2(ih->ring_size / 4);
 165
 166         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 167                                    MC_SPACE, ih->use_bus_addr ? 1 : 4);
 168         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 169                                    WPTR_OVERFLOW_CLEAR, 1);
 170         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 171                                    WPTR_OVERFLOW_ENABLE, 1);
 172         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
 173         /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
 174          * value is written to memory
 175          */
 176         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 177                                    WPTR_WRITEBACK_ENABLE, 1);
 178         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
 179         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
 180         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
 181
 182         return ih_rb_cntl;
 183 }
 184
 185 static uint32_t vega20_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
 186 {
 187         u32 ih_doorbell_rtpr = 0;
 188
 189         if (ih->use_doorbell) {
 190                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 191                                                  IH_DOORBELL_RPTR, OFFSET,
 192                                                  ih->doorbell_index);
 193                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 194                                                  IH_DOORBELL_RPTR,
 195                                                  ENABLE, 1);
 196         } else {
 197                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 198                                                  IH_DOORBELL_RPTR,
 199                                                  ENABLE, 0);
 200         }
 201         return ih_doorbell_rtpr;
 202 }
 203
 204 /**
 205  * vega20_ih_enable_ring - enable an ih ring buffer
 206  *
 207  * @adev: amdgpu_device pointer
 208  * @ih: amdgpu_ih_ring pointer
 209  *
 210  * Enable an ih ring buffer (VEGA20)
 211  */
 212 static int vega20_ih_enable_ring(struct amdgpu_device *adev,
 213                                  struct amdgpu_ih_ring *ih)
 214 {
 215         struct amdgpu_ih_regs *ih_regs;
 216         uint32_t tmp;
 217
 218         ih_regs = &ih->ih_regs;
 219
 220         /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
 221         WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
 222         WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
 223
 224         tmp = RREG32(ih_regs->ih_rb_cntl);
 225         tmp = vega20_ih_rb_cntl(ih, tmp);
 226         if (ih == &adev->irq.ih)
 227                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
 228         if (ih == &adev->irq.ih1)
 229                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
 230         if (amdgpu_sriov_vf(adev)) {
 231                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 232                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 233                         return -ETIMEDOUT;
 234                 }
 235         } else {
 236                 WREG32(ih_regs->ih_rb_cntl, tmp);
 237         }
 238
 239         if (ih == &adev->irq.ih) {
 240                 /* set the ih ring 0 writeback address whether it's enabled or not */
 241                 WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
 242                 WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
 243         }
 244
 245         /* set rptr, wptr to 0 */
 246         WREG32(ih_regs->ih_rb_wptr, 0);
 247         WREG32(ih_regs->ih_rb_rptr, 0);
 248
 249         WREG32(ih_regs->ih_doorbell_rptr, vega20_ih_doorbell_rptr(ih));
 250
 251         return 0;
 252 }
 253
 254 /**
 255  * vega20_ih_reroute_ih - reroute VMC/UTCL2 ih to an ih ring
 256  *
 257  * @adev: amdgpu_device pointer
 258  *
 259  * Reroute VMC and UMC interrupts on primary ih ring to
 260  * ih ring 1 so they won't lose when bunches of page faults
 261  * interrupts overwhelms the interrupt handler(VEGA20)
 262  */
 263 static void vega20_ih_reroute_ih(struct amdgpu_device *adev)
 264 {
 265         uint32_t tmp;
 266
 267         /* vega20 ih reroute will go through psp this
 268          * function is used for newer asics starting arcturus
 269          */
 270         if (adev->ip_versions[OSSSYS_HWIP][0] >= IP_VERSION(4, 2, 1)) {
 271                 /* Reroute to IH ring 1 for VMC */
 272                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x12);
 273                 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
 274                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, CLIENT_TYPE, 1);
 275                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
 276                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
 277
 278                 /* Reroute IH ring 1 for UTCL2 */
 279                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_INDEX, 0x1B);
 280                 tmp = RREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA);
 281                 tmp = REG_SET_FIELD(tmp, IH_CLIENT_CFG_DATA, RING_ID, 1);
 282                 WREG32_SOC15(OSSSYS, 0, mmIH_CLIENT_CFG_DATA, tmp);
 283         }
 284 }
 285
 286 /**
 287  * vega20_ih_irq_init - init and enable the interrupt ring
 288  *
 289  * @adev: amdgpu_device pointer
 290  *
 291  * Allocate a ring buffer for the interrupt controller,
 292  * enable the RLC, disable interrupts, enable the IH
 293  * ring buffer and enable it (VI).
 294  * Called at device load and reume.
 295  * Returns 0 for success, errors for failure.
 296  */
 297 static int vega20_ih_irq_init(struct amdgpu_device *adev)
 298 {
 299         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 300         u32 ih_chicken;
 301         int ret;
 302         int i;
 303
 304         /* disable irqs */
 305         ret = vega20_ih_toggle_interrupts(adev, false);
 306         if (ret)
 307                 return ret;
 308
 309         adev->nbio.funcs->ih_control(adev);
 310
 311         if ((adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 2, 1)) &&
 312             adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 313                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
 314                 if (adev->irq.ih.use_bus_addr) {
 315                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 316                                                    MC_SPACE_GPA_ENABLE, 1);
 317                 }
 318                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 319         }
 320
 321         /* psp firmware won't program IH_CHICKEN for aldebaran
 322          * driver needs to program it properly according to
 323          * MC_SPACE type in IH_RB_CNTL */
 324         if (adev->ip_versions[OSSSYS_HWIP][0] == IP_VERSION(4, 4, 0)) {
 325                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN);
 326                 if (adev->irq.ih.use_bus_addr) {
 327                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 328                                                    MC_SPACE_GPA_ENABLE, 1);
 329                 }
 330                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken);
 331         }
 332
 333         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 334                 if (ih[i]->ring_size) {
 335                         if (i == 1)
 336                                 vega20_ih_reroute_ih(adev);
 337                         ret = vega20_ih_enable_ring(adev, ih[i]);
 338                         if (ret)
 339                                 return ret;
 340                 }
 341         }
 342
 343         if (!amdgpu_sriov_vf(adev))
 344                 adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
 345                                                     adev->irq.ih.doorbell_index);
 346
 347         pci_set_master(adev->pdev);
 348
 349         /* enable interrupts */
 350         ret = vega20_ih_toggle_interrupts(adev, true);
 351         if (ret)
 352                 return ret;
 353
 354         if (adev->irq.ih_soft.ring_size)
 355                 adev->irq.ih_soft.enabled = true;
 356
 357         return 0;
 358 }
 359
 360 /**
 361  * vega20_ih_irq_disable - disable interrupts
 362  *
 363  * @adev: amdgpu_device pointer
 364  *
 365  * Disable interrupts on the hw (VEGA20).
 366  */
 367 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 368 {
 369         vega20_ih_toggle_interrupts(adev, false);
 370
 371         /* Wait and acknowledge irq */
 372         mdelay(1);
 373 }
 374
 375 /**
 376  * vega20_ih_get_wptr - get the IH ring buffer wptr
 377  *
 378  * @adev: amdgpu_device pointer
 379  * @ih: amdgpu_ih_ring pointer
 380  *
 381  * Get the IH ring buffer wptr from either the register
 382  * or the writeback memory buffer (VEGA20).  Also check for
 383  * ring buffer overflow and deal with it.
 384  * Returns the value of the wptr.
 385  */
 386 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 387                               struct amdgpu_ih_ring *ih)
 388 {
 389         u32 wptr, tmp;
 390         struct amdgpu_ih_regs *ih_regs;
 391
 392         if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
 393                 /* Only ring0 supports writeback. On other rings fall back
 394                  * to register-based code with overflow checking below.
 395                  * ih_soft ring doesn't have any backing hardware registers,
 396                  * update wptr and return.
 397                  */
 398                 wptr = le32_to_cpu(*ih->wptr_cpu);
 399
 400                 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 401                         goto out;
 402         }
 403
 404         ih_regs = &ih->ih_regs;
 405
 406         /* Double check that the overflow wasn't already cleared. */
 407         wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 408         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 409                 goto out;
 410
 411         wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 412
 413         /* When a ring buffer overflow happen start parsing interrupt
 414          * from the last not overwritten vector (wptr + 32). Hopefully
 415          * this should allow us to catchup.
 416          */
 417         tmp = (wptr + 32) & ih->ptr_mask;
 418         dev_warn(adev->dev, "IH ring buffer overflow "
 419                  "(0x%08X, 0x%08X, 0x%08X)\n",
 420                  wptr, ih->rptr, tmp);
 421         ih->rptr = tmp;
 422
 423         tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 424         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 425         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 426
 427 out:
 428         return (wptr & ih->ptr_mask);
 429 }
 430
 431 /**
 432  * vega20_ih_irq_rearm - rearm IRQ if lost
 433  *
 434  * @adev: amdgpu_device pointer
 435  * @ih: amdgpu_ih_ring pointer
 436  *
 437  */
 438 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 439                                struct amdgpu_ih_ring *ih)
 440 {
 441         uint32_t v = 0;
 442         uint32_t i = 0;
 443         struct amdgpu_ih_regs *ih_regs;
 444
 445         ih_regs = &ih->ih_regs;
 446
 447         /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 448         for (i = 0; i < MAX_REARM_RETRY; i++) {
 449                 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 450                 if ((v < ih->ring_size) && (v != ih->rptr))
 451                         WDOORBELL32(ih->doorbell_index, ih->rptr);
 452                 else
 453                         break;
 454         }
 455 }
 456
 457 /**
 458  * vega20_ih_set_rptr - set the IH ring buffer rptr
 459  *
 460  * @adev: amdgpu_device pointer
 461  * @ih: amdgpu_ih_ring pointer
 462  *
 463  * Set the IH ring buffer rptr.
 464  */
 465 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 466                                struct amdgpu_ih_ring *ih)
 467 {
 468         struct amdgpu_ih_regs *ih_regs;
 469
 470         if (ih == &adev->irq.ih_soft)
 471                 return;
 472
 473         if (ih->use_doorbell) {
 474                 /* XXX check if swapping is necessary on BE */
 475                 *ih->rptr_cpu = ih->rptr;
 476                 WDOORBELL32(ih->doorbell_index, ih->rptr);
 477
 478                 if (amdgpu_sriov_vf(adev))
 479                         vega20_ih_irq_rearm(adev, ih);
 480         } else {
 481                 ih_regs = &ih->ih_regs;
 482                 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 483         }
 484 }
 485
 486 /**
 487  * vega20_ih_self_irq - dispatch work for ring 1 and 2
 488  *
 489  * @adev: amdgpu_device pointer
 490  * @source: irq source
 491  * @entry: IV with WPTR update
 492  *
 493  * Update the WPTR from the IV and schedule work to handle the entries.
 494  */
 495 static int vega20_ih_self_irq(struct amdgpu_device *adev,
 496                               struct amdgpu_irq_src *source,
 497                               struct amdgpu_iv_entry *entry)
 498 {
 499         switch (entry->ring_id) {
 500         case 1:
 501                 schedule_work(&adev->irq.ih1_work);
 502                 break;
 503         case 2:
 504                 schedule_work(&adev->irq.ih2_work);
 505                 break;
 506         default: break;
 507         }
 508         return 0;
 509 }
 510
 511 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 512         .process = vega20_ih_self_irq,
 513 };
 514
 515 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 516 {
 517         adev->irq.self_irq.num_types = 0;
 518         adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 519 }
 520
 521 static int vega20_ih_early_init(void *handle)
 522 {
 523         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 524
 525         vega20_ih_set_interrupt_funcs(adev);
 526         vega20_ih_set_self_irq_funcs(adev);
 527         return 0;
 528 }
 529
 530 static int vega20_ih_sw_init(void *handle)
 531 {
 532         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 533         int r;
 534
 535         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 536                               &adev->irq.self_irq);
 537         if (r)
 538                 return r;
 539
 540         r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
 541         if (r)
 542                 return r;
 543
 544         adev->irq.ih.use_doorbell = true;
 545         adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 546
 547         r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
 548         if (r)
 549                 return r;
 550
 551         adev->irq.ih1.use_doorbell = true;
 552         adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 553
 554         r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 555         if (r)
 556                 return r;
 557
 558         adev->irq.ih2.use_doorbell = true;
 559         adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 560
 561         /* initialize ih control registers offset */
 562         vega20_ih_init_register_offset(adev);
 563
 564         r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, PAGE_SIZE, true);
 565         if (r)
 566                 return r;
 567
 568         r = amdgpu_irq_init(adev);
 569
 570         return r;
 571 }
 572
 573 static int vega20_ih_sw_fini(void *handle)
 574 {
 575         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 576
 577         amdgpu_irq_fini_sw(adev);
 578
 579         return 0;
 580 }
 581
 582 static int vega20_ih_hw_init(void *handle)
 583 {
 584         int r;
 585         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 586
 587         r = vega20_ih_irq_init(adev);
 588         if (r)
 589                 return r;
 590
 591         return 0;
 592 }
 593
 594 static int vega20_ih_hw_fini(void *handle)
 595 {
 596         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 597
 598         vega20_ih_irq_disable(adev);
 599
 600         return 0;
 601 }
 602
 603 static int vega20_ih_suspend(void *handle)
 604 {
 605         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 606
 607         return vega20_ih_hw_fini(adev);
 608 }
 609
 610 static int vega20_ih_resume(void *handle)
 611 {
 612         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 613
 614         return vega20_ih_hw_init(adev);
 615 }
 616
 617 static bool vega20_ih_is_idle(void *handle)
 618 {
 619         /* todo */
 620         return true;
 621 }
 622
 623 static int vega20_ih_wait_for_idle(void *handle)
 624 {
 625         /* todo */
 626         return -ETIMEDOUT;
 627 }
 628
 629 static int vega20_ih_soft_reset(void *handle)
 630 {
 631         /* todo */
 632
 633         return 0;
 634 }
 635
 636 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 637                                                bool enable)
 638 {
 639         uint32_t data, def, field_val;
 640
 641         if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 642                 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 643                 field_val = enable ? 0 : 1;
 644                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 645                                      IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 646                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 647                                      IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 648                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 649                                      DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 650                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 651                                      OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 652                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 653                                      LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 654                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 655                                      DYN_CLK_SOFT_OVERRIDE, field_val);
 656                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 657                                      REG_CLK_SOFT_OVERRIDE, field_val);
 658                 if (def != data)
 659                         WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 660         }
 661 }
 662
 663 static int vega20_ih_set_clockgating_state(void *handle,
 664                                           enum amd_clockgating_state state)
 665 {
 666         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 667
 668         vega20_ih_update_clockgating_state(adev,
 669                                 state == AMD_CG_STATE_GATE);
 670         return 0;
 671
 672 }
 673
 674 static int vega20_ih_set_powergating_state(void *handle,
 675                                           enum amd_powergating_state state)
 676 {
 677         return 0;
 678 }
 679
 680 const struct amd_ip_funcs vega20_ih_ip_funcs = {
 681         .name = "vega20_ih",
 682         .early_init = vega20_ih_early_init,
 683         .late_init = NULL,
 684         .sw_init = vega20_ih_sw_init,
 685         .sw_fini = vega20_ih_sw_fini,
 686         .hw_init = vega20_ih_hw_init,
 687         .hw_fini = vega20_ih_hw_fini,
 688         .suspend = vega20_ih_suspend,
 689         .resume = vega20_ih_resume,
 690         .is_idle = vega20_ih_is_idle,
 691         .wait_for_idle = vega20_ih_wait_for_idle,
 692         .soft_reset = vega20_ih_soft_reset,
 693         .set_clockgating_state = vega20_ih_set_clockgating_state,
 694         .set_powergating_state = vega20_ih_set_powergating_state,
 695 };
 696
 697 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 698         .get_wptr = vega20_ih_get_wptr,
 699         .decode_iv = amdgpu_ih_decode_iv_helper,
 700         .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
 701         .set_rptr = vega20_ih_set_rptr
 702 };
 703
 704 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 705 {
 706         adev->irq.ih_funcs = &vega20_ih_funcs;
 707 }
 708
 709 const struct amdgpu_ip_block_version vega20_ih_ip_block =
 710 {
 711         .type = AMD_IP_BLOCK_TYPE_IH,
 712         .major = 4,
 713         .minor = 2,
 714         .rev = 0,
 715         .funcs = &vega20_ih_ip_funcs,
 716 };