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 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN               0x00ea
  42 #define mmIH_RETRY_INT_CAM_CNTL_ALDEBARAN_BASE_IDX      0
  43 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE__SHIFT  0x10
  44 #define IH_RETRY_INT_CAM_CNTL_ALDEBARAN__ENABLE_MASK    0x00010000L
  45
  46 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev);
  47
  48 /**
  49  * vega20_ih_init_register_offset - Initialize register offset for ih rings
  50  *
  51  * @adev: amdgpu_device pointer
  52  *
  53  * Initialize register offset ih rings (VEGA20).
  54  */
  55 static void vega20_ih_init_register_offset(struct amdgpu_device *adev)
  56 {
  57         struct amdgpu_ih_regs *ih_regs;
  58
  59         if (adev->irq.ih.ring_size) {
  60                 ih_regs = &adev->irq.ih.ih_regs;
  61                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE);
  62                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI);
  63                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL);
  64                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR);
  65                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR);
  66                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR);
  67                 ih_regs->ih_rb_wptr_addr_lo = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_LO);
  68                 ih_regs->ih_rb_wptr_addr_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_ADDR_HI);
  69                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL;
  70         }
  71
  72         if (adev->irq.ih1.ring_size) {
  73                 ih_regs = &adev->irq.ih1.ih_regs;
  74                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING1);
  75                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING1);
  76                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING1);
  77                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING1);
  78                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING1);
  79                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING1);
  80                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING1;
  81         }
  82
  83         if (adev->irq.ih2.ring_size) {
  84                 ih_regs = &adev->irq.ih2.ih_regs;
  85                 ih_regs->ih_rb_base = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_RING2);
  86                 ih_regs->ih_rb_base_hi = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_BASE_HI_RING2);
  87                 ih_regs->ih_rb_cntl = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_CNTL_RING2);
  88                 ih_regs->ih_rb_wptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_WPTR_RING2);
  89                 ih_regs->ih_rb_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_RB_RPTR_RING2);
  90                 ih_regs->ih_doorbell_rptr = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_DOORBELL_RPTR_RING2);
  91                 ih_regs->psp_reg_id = PSP_REG_IH_RB_CNTL_RING2;
  92         }
  93 }
  94
  95 /**
  96  * vega20_ih_toggle_ring_interrupts - toggle the interrupt ring buffer
  97  *
  98  * @adev: amdgpu_device pointer
  99  * @ih: amdgpu_ih_ring pointer
 100  * @enable: true - enable the interrupts, false - disable the interrupts
 101  *
 102  * Toggle the interrupt ring buffer (VEGA20)
 103  */
 104 static int vega20_ih_toggle_ring_interrupts(struct amdgpu_device *adev,
 105                                             struct amdgpu_ih_ring *ih,
 106                                             bool enable)
 107 {
 108         struct amdgpu_ih_regs *ih_regs;
 109         uint32_t tmp;
 110
 111         ih_regs = &ih->ih_regs;
 112
 113         tmp = RREG32(ih_regs->ih_rb_cntl);
 114         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_ENABLE, (enable ? 1 : 0));
 115         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_GPU_TS_ENABLE, 1);
 116
 117         /* enable_intr field is only valid in ring0 */
 118         if (ih == &adev->irq.ih)
 119                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, ENABLE_INTR, (enable ? 1 : 0));
 120         if (amdgpu_sriov_vf(adev)) {
 121                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 122                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 123                         return -ETIMEDOUT;
 124                 }
 125         } else {
 126                 WREG32(ih_regs->ih_rb_cntl, tmp);
 127         }
 128
 129         if (enable) {
 130                 ih->enabled = true;
 131         } else {
 132                 /* set rptr, wptr to 0 */
 133                 WREG32(ih_regs->ih_rb_rptr, 0);
 134                 WREG32(ih_regs->ih_rb_wptr, 0);
 135                 ih->enabled = false;
 136                 ih->rptr = 0;
 137         }
 138
 139         return 0;
 140 }
 141
 142 /**
 143  * vega20_ih_toggle_interrupts - Toggle all the available interrupt ring buffers
 144  *
 145  * @adev: amdgpu_device pointer
 146  * @enable: enable or disable interrupt ring buffers
 147  *
 148  * Toggle all the available interrupt ring buffers (VEGA20).
 149  */
 150 static int vega20_ih_toggle_interrupts(struct amdgpu_device *adev, bool enable)
 151 {
 152         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 153         int i;
 154         int r;
 155
 156         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 157                 if (ih[i]->ring_size) {
 158                         r = vega20_ih_toggle_ring_interrupts(adev, ih[i], enable);
 159                         if (r)
 160                                 return r;
 161                 }
 162         }
 163
 164         return 0;
 165 }
 166
 167 static uint32_t vega20_ih_rb_cntl(struct amdgpu_ih_ring *ih, uint32_t ih_rb_cntl)
 168 {
 169         int rb_bufsz = order_base_2(ih->ring_size / 4);
 170
 171         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 172                                    MC_SPACE, ih->use_bus_addr ? 1 : 4);
 173         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 174                                    WPTR_OVERFLOW_CLEAR, 1);
 175         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 176                                    WPTR_OVERFLOW_ENABLE, 1);
 177         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, RB_SIZE, rb_bufsz);
 178         /* Ring Buffer write pointer writeback. If enabled, IH_RB_WPTR register
 179          * value is written to memory
 180          */
 181         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL,
 182                                    WPTR_WRITEBACK_ENABLE, 1);
 183         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_SNOOP, 1);
 184         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_RO, 0);
 185         ih_rb_cntl = REG_SET_FIELD(ih_rb_cntl, IH_RB_CNTL, MC_VMID, 0);
 186
 187         return ih_rb_cntl;
 188 }
 189
 190 static uint32_t vega20_ih_doorbell_rptr(struct amdgpu_ih_ring *ih)
 191 {
 192         u32 ih_doorbell_rtpr = 0;
 193
 194         if (ih->use_doorbell) {
 195                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 196                                                  IH_DOORBELL_RPTR, OFFSET,
 197                                                  ih->doorbell_index);
 198                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 199                                                  IH_DOORBELL_RPTR,
 200                                                  ENABLE, 1);
 201         } else {
 202                 ih_doorbell_rtpr = REG_SET_FIELD(ih_doorbell_rtpr,
 203                                                  IH_DOORBELL_RPTR,
 204                                                  ENABLE, 0);
 205         }
 206         return ih_doorbell_rtpr;
 207 }
 208
 209 /**
 210  * vega20_ih_enable_ring - enable an ih ring buffer
 211  *
 212  * @adev: amdgpu_device pointer
 213  * @ih: amdgpu_ih_ring pointer
 214  *
 215  * Enable an ih ring buffer (VEGA20)
 216  */
 217 static int vega20_ih_enable_ring(struct amdgpu_device *adev,
 218                                  struct amdgpu_ih_ring *ih)
 219 {
 220         struct amdgpu_ih_regs *ih_regs;
 221         uint32_t tmp;
 222
 223         ih_regs = &ih->ih_regs;
 224
 225         /* Ring Buffer base. [39:8] of 40-bit address of the beginning of the ring buffer*/
 226         WREG32(ih_regs->ih_rb_base, ih->gpu_addr >> 8);
 227         WREG32(ih_regs->ih_rb_base_hi, (ih->gpu_addr >> 40) & 0xff);
 228
 229         tmp = RREG32(ih_regs->ih_rb_cntl);
 230         tmp = vega20_ih_rb_cntl(ih, tmp);
 231         if (ih == &adev->irq.ih)
 232                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RPTR_REARM, !!adev->irq.msi_enabled);
 233         if (ih == &adev->irq.ih1)
 234                 tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, RB_FULL_DRAIN_ENABLE, 1);
 235         if (amdgpu_sriov_vf(adev)) {
 236                 if (psp_reg_program(&adev->psp, ih_regs->psp_reg_id, tmp)) {
 237                         dev_err(adev->dev, "PSP program IH_RB_CNTL failed!\n");
 238                         return -ETIMEDOUT;
 239                 }
 240         } else {
 241                 WREG32(ih_regs->ih_rb_cntl, tmp);
 242         }
 243
 244         if (ih == &adev->irq.ih) {
 245                 /* set the ih ring 0 writeback address whether it's enabled or not */
 246                 WREG32(ih_regs->ih_rb_wptr_addr_lo, lower_32_bits(ih->wptr_addr));
 247                 WREG32(ih_regs->ih_rb_wptr_addr_hi, upper_32_bits(ih->wptr_addr) & 0xFFFF);
 248         }
 249
 250         /* set rptr, wptr to 0 */
 251         WREG32(ih_regs->ih_rb_wptr, 0);
 252         WREG32(ih_regs->ih_rb_rptr, 0);
 253
 254         WREG32(ih_regs->ih_doorbell_rptr, vega20_ih_doorbell_rptr(ih));
 255
 256         return 0;
 257 }
 258
 259 static uint32_t vega20_setup_retry_doorbell(u32 doorbell_index)
 260 {
 261         u32 val = 0;
 262
 263         val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, OFFSET, doorbell_index);
 264         val = REG_SET_FIELD(val, IH_DOORBELL_RPTR, ENABLE, 1);
 265
 266         return val;
 267 }
 268
 269 /**
 270  * vega20_ih_irq_init - init and enable the interrupt ring
 271  *
 272  * @adev: amdgpu_device pointer
 273  *
 274  * Allocate a ring buffer for the interrupt controller,
 275  * enable the RLC, disable interrupts, enable the IH
 276  * ring buffer and enable it (VI).
 277  * Called at device load and reume.
 278  * Returns 0 for success, errors for failure.
 279  */
 280 static int vega20_ih_irq_init(struct amdgpu_device *adev)
 281 {
 282         struct amdgpu_ih_ring *ih[] = {&adev->irq.ih, &adev->irq.ih1, &adev->irq.ih2};
 283         u32 ih_chicken;
 284         int ret;
 285         int i;
 286
 287         /* disable irqs */
 288         ret = vega20_ih_toggle_interrupts(adev, false);
 289         if (ret)
 290                 return ret;
 291
 292         adev->nbio.funcs->ih_control(adev);
 293
 294         if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 2, 1)) &&
 295             adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 296                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
 297                 if (adev->irq.ih.use_bus_addr) {
 298                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 299                                                    MC_SPACE_GPA_ENABLE, 1);
 300                 }
 301                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 302         }
 303
 304         /* psp firmware won't program IH_CHICKEN for aldebaran
 305          * driver needs to program it properly according to
 306          * MC_SPACE type in IH_RB_CNTL */
 307         if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0)) ||
 308             (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2))) {
 309                 ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN);
 310                 if (adev->irq.ih.use_bus_addr) {
 311                         ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 312                                                    MC_SPACE_GPA_ENABLE, 1);
 313                 }
 314                 WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken);
 315         }
 316
 317         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 318                 if (ih[i]->ring_size) {
 319                         ret = vega20_ih_enable_ring(adev, ih[i]);
 320                         if (ret)
 321                                 return ret;
 322                 }
 323         }
 324
 325         if (!amdgpu_sriov_vf(adev))
 326                 adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
 327                                                     adev->irq.ih.doorbell_index);
 328
 329         pci_set_master(adev->pdev);
 330
 331         /* Allocate the doorbell for IH Retry CAM */
 332         adev->irq.retry_cam_doorbell_index = (adev->doorbell_index.ih + 3) << 1;
 333         WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RETRY_CAM,
 334                 vega20_setup_retry_doorbell(adev->irq.retry_cam_doorbell_index));
 335
 336         /* Enable IH Retry CAM */
 337         if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0) ||
 338             amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2))
 339                 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL_ALDEBARAN,
 340                                ENABLE, 1);
 341         else
 342                 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL, ENABLE, 1);
 343
 344         adev->irq.retry_cam_enabled = true;
 345
 346         /* enable interrupts */
 347         ret = vega20_ih_toggle_interrupts(adev, true);
 348         if (ret)
 349                 return ret;
 350
 351         if (adev->irq.ih_soft.ring_size)
 352                 adev->irq.ih_soft.enabled = true;
 353
 354         return 0;
 355 }
 356
 357 /**
 358  * vega20_ih_irq_disable - disable interrupts
 359  *
 360  * @adev: amdgpu_device pointer
 361  *
 362  * Disable interrupts on the hw (VEGA20).
 363  */
 364 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 365 {
 366         vega20_ih_toggle_interrupts(adev, false);
 367
 368         /* Wait and acknowledge irq */
 369         mdelay(1);
 370 }
 371
 372 /**
 373  * vega20_ih_get_wptr - get the IH ring buffer wptr
 374  *
 375  * @adev: amdgpu_device pointer
 376  * @ih: amdgpu_ih_ring pointer
 377  *
 378  * Get the IH ring buffer wptr from either the register
 379  * or the writeback memory buffer (VEGA20).  Also check for
 380  * ring buffer overflow and deal with it.
 381  * Returns the value of the wptr.
 382  */
 383 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 384                               struct amdgpu_ih_ring *ih)
 385 {
 386         u32 wptr, tmp;
 387         struct amdgpu_ih_regs *ih_regs;
 388
 389         if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
 390                 /* Only ring0 supports writeback. On other rings fall back
 391                  * to register-based code with overflow checking below.
 392                  * ih_soft ring doesn't have any backing hardware registers,
 393                  * update wptr and return.
 394                  */
 395                 wptr = le32_to_cpu(*ih->wptr_cpu);
 396
 397                 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 398                         goto out;
 399         }
 400
 401         ih_regs = &ih->ih_regs;
 402
 403         /* Double check that the overflow wasn't already cleared. */
 404         wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 405         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 406                 goto out;
 407
 408         wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 409
 410         /* When a ring buffer overflow happen start parsing interrupt
 411          * from the last not overwritten vector (wptr + 32). Hopefully
 412          * this should allow us to catchup.
 413          */
 414         tmp = (wptr + 32) & ih->ptr_mask;
 415         dev_warn(adev->dev, "IH ring buffer overflow "
 416                  "(0x%08X, 0x%08X, 0x%08X)\n",
 417                  wptr, ih->rptr, tmp);
 418         ih->rptr = tmp;
 419
 420         tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 421         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 422         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 423
 424 out:
 425         return (wptr & ih->ptr_mask);
 426 }
 427
 428 /**
 429  * vega20_ih_irq_rearm - rearm IRQ if lost
 430  *
 431  * @adev: amdgpu_device pointer
 432  * @ih: amdgpu_ih_ring pointer
 433  *
 434  */
 435 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 436                                struct amdgpu_ih_ring *ih)
 437 {
 438         uint32_t v = 0;
 439         uint32_t i = 0;
 440         struct amdgpu_ih_regs *ih_regs;
 441
 442         ih_regs = &ih->ih_regs;
 443
 444         /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 445         for (i = 0; i < MAX_REARM_RETRY; i++) {
 446                 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 447                 if ((v < ih->ring_size) && (v != ih->rptr))
 448                         WDOORBELL32(ih->doorbell_index, ih->rptr);
 449                 else
 450                         break;
 451         }
 452 }
 453
 454 /**
 455  * vega20_ih_set_rptr - set the IH ring buffer rptr
 456  *
 457  * @adev: amdgpu_device pointer
 458  * @ih: amdgpu_ih_ring pointer
 459  *
 460  * Set the IH ring buffer rptr.
 461  */
 462 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 463                                struct amdgpu_ih_ring *ih)
 464 {
 465         struct amdgpu_ih_regs *ih_regs;
 466
 467         if (ih == &adev->irq.ih_soft)
 468                 return;
 469
 470         if (ih->use_doorbell) {
 471                 /* XXX check if swapping is necessary on BE */
 472                 *ih->rptr_cpu = ih->rptr;
 473                 WDOORBELL32(ih->doorbell_index, ih->rptr);
 474
 475                 if (amdgpu_sriov_vf(adev))
 476                         vega20_ih_irq_rearm(adev, ih);
 477         } else {
 478                 ih_regs = &ih->ih_regs;
 479                 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 480         }
 481 }
 482
 483 /**
 484  * vega20_ih_self_irq - dispatch work for ring 1 and 2
 485  *
 486  * @adev: amdgpu_device pointer
 487  * @source: irq source
 488  * @entry: IV with WPTR update
 489  *
 490  * Update the WPTR from the IV and schedule work to handle the entries.
 491  */
 492 static int vega20_ih_self_irq(struct amdgpu_device *adev,
 493                               struct amdgpu_irq_src *source,
 494                               struct amdgpu_iv_entry *entry)
 495 {
 496         switch (entry->ring_id) {
 497         case 1:
 498                 schedule_work(&adev->irq.ih1_work);
 499                 break;
 500         case 2:
 501                 schedule_work(&adev->irq.ih2_work);
 502                 break;
 503         default:
 504                 break;
 505         }
 506         return 0;
 507 }
 508
 509 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 510         .process = vega20_ih_self_irq,
 511 };
 512
 513 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 514 {
 515         adev->irq.self_irq.num_types = 0;
 516         adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 517 }
 518
 519 static int vega20_ih_early_init(void *handle)
 520 {
 521         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 522
 523         vega20_ih_set_interrupt_funcs(adev);
 524         vega20_ih_set_self_irq_funcs(adev);
 525         return 0;
 526 }
 527
 528 static int vega20_ih_sw_init(void *handle)
 529 {
 530         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 531         bool use_bus_addr = true;
 532         int r;
 533
 534         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 535                               &adev->irq.self_irq);
 536         if (r)
 537                 return r;
 538
 539         if ((adev->flags & AMD_IS_APU) &&
 540             (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2)))
 541                 use_bus_addr = false;
 542
 543         r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr);
 544         if (r)
 545                 return r;
 546
 547         adev->irq.ih.use_doorbell = true;
 548         adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 549
 550         r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, use_bus_addr);
 551         if (r)
 552                 return r;
 553
 554         adev->irq.ih1.use_doorbell = true;
 555         adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 556
 557         if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) != IP_VERSION(4, 4, 2)) {
 558                 r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 559                 if (r)
 560                         return r;
 561
 562                 adev->irq.ih2.use_doorbell = true;
 563                 adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 564         }
 565
 566         /* initialize ih control registers offset */
 567         vega20_ih_init_register_offset(adev);
 568
 569         r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, use_bus_addr);
 570         if (r)
 571                 return r;
 572
 573         r = amdgpu_irq_init(adev);
 574
 575         return r;
 576 }
 577
 578 static int vega20_ih_sw_fini(void *handle)
 579 {
 580         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 581
 582         amdgpu_irq_fini_sw(adev);
 583
 584         return 0;
 585 }
 586
 587 static int vega20_ih_hw_init(void *handle)
 588 {
 589         int r;
 590         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 591
 592         r = vega20_ih_irq_init(adev);
 593         if (r)
 594                 return r;
 595
 596         return 0;
 597 }
 598
 599 static int vega20_ih_hw_fini(void *handle)
 600 {
 601         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 602
 603         vega20_ih_irq_disable(adev);
 604
 605         return 0;
 606 }
 607
 608 static int vega20_ih_suspend(void *handle)
 609 {
 610         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 611
 612         return vega20_ih_hw_fini(adev);
 613 }
 614
 615 static int vega20_ih_resume(void *handle)
 616 {
 617         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 618
 619         return vega20_ih_hw_init(adev);
 620 }
 621
 622 static bool vega20_ih_is_idle(void *handle)
 623 {
 624         /* todo */
 625         return true;
 626 }
 627
 628 static int vega20_ih_wait_for_idle(void *handle)
 629 {
 630         /* todo */
 631         return -ETIMEDOUT;
 632 }
 633
 634 static int vega20_ih_soft_reset(void *handle)
 635 {
 636         /* todo */
 637
 638         return 0;
 639 }
 640
 641 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 642                                                bool enable)
 643 {
 644         uint32_t data, def, field_val;
 645
 646         if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 647                 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 648                 field_val = enable ? 0 : 1;
 649                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 650                                      IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 651                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 652                                      IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 653                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 654                                      DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 655                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 656                                      OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 657                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 658                                      LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 659                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 660                                      DYN_CLK_SOFT_OVERRIDE, field_val);
 661                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 662                                      REG_CLK_SOFT_OVERRIDE, field_val);
 663                 if (def != data)
 664                         WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 665         }
 666 }
 667
 668 static int vega20_ih_set_clockgating_state(void *handle,
 669                                           enum amd_clockgating_state state)
 670 {
 671         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 672
 673         vega20_ih_update_clockgating_state(adev,
 674                                 state == AMD_CG_STATE_GATE);
 675         return 0;
 676
 677 }
 678
 679 static int vega20_ih_set_powergating_state(void *handle,
 680                                           enum amd_powergating_state state)
 681 {
 682         return 0;
 683 }
 684
 685 const struct amd_ip_funcs vega20_ih_ip_funcs = {
 686         .name = "vega20_ih",
 687         .early_init = vega20_ih_early_init,
 688         .late_init = NULL,
 689         .sw_init = vega20_ih_sw_init,
 690         .sw_fini = vega20_ih_sw_fini,
 691         .hw_init = vega20_ih_hw_init,
 692         .hw_fini = vega20_ih_hw_fini,
 693         .suspend = vega20_ih_suspend,
 694         .resume = vega20_ih_resume,
 695         .is_idle = vega20_ih_is_idle,
 696         .wait_for_idle = vega20_ih_wait_for_idle,
 697         .soft_reset = vega20_ih_soft_reset,
 698         .set_clockgating_state = vega20_ih_set_clockgating_state,
 699         .set_powergating_state = vega20_ih_set_powergating_state,
 700 };
 701
 702 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 703         .get_wptr = vega20_ih_get_wptr,
 704         .decode_iv = amdgpu_ih_decode_iv_helper,
 705         .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
 706         .set_rptr = vega20_ih_set_rptr
 707 };
 708
 709 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 710 {
 711         adev->irq.ih_funcs = &vega20_ih_funcs;
 712 }
 713
 714 const struct amdgpu_ip_block_version vega20_ih_ip_block = {
 715         .type = AMD_IP_BLOCK_TYPE_IH,
 716         .major = 4,
 717         .minor = 2,
 718         .rev = 0,
 719         .funcs = &vega20_ih_ip_funcs,
 720 };