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_sriov_vf(adev)) {
 295                 if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 2, 1)) &&
 296                     adev->firmware.load_type == AMDGPU_FW_LOAD_DIRECT) {
 297                         ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN);
 298                         if (adev->irq.ih.use_bus_addr) {
 299                                 ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 300                                                            MC_SPACE_GPA_ENABLE, 1);
 301                         }
 302                         WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN, ih_chicken);
 303                 }
 304
 305                 /* psp firmware won't program IH_CHICKEN for aldebaran
 306                  * driver needs to program it properly according to
 307                  * MC_SPACE type in IH_RB_CNTL */
 308                 if ((amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0)) ||
 309                     (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2))) {
 310                         ih_chicken = RREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN);
 311                         if (adev->irq.ih.use_bus_addr) {
 312                                 ih_chicken = REG_SET_FIELD(ih_chicken, IH_CHICKEN,
 313                                                            MC_SPACE_GPA_ENABLE, 1);
 314                         }
 315                         WREG32_SOC15(OSSSYS, 0, mmIH_CHICKEN_ALDEBARAN, ih_chicken);
 316                 }
 317         }
 318
 319         for (i = 0; i < ARRAY_SIZE(ih); i++) {
 320                 if (ih[i]->ring_size) {
 321                         ret = vega20_ih_enable_ring(adev, ih[i]);
 322                         if (ret)
 323                                 return ret;
 324                 }
 325         }
 326
 327         if (!amdgpu_sriov_vf(adev))
 328                 adev->nbio.funcs->ih_doorbell_range(adev, adev->irq.ih.use_doorbell,
 329                                                     adev->irq.ih.doorbell_index);
 330
 331         pci_set_master(adev->pdev);
 332
 333         /* Allocate the doorbell for IH Retry CAM */
 334         adev->irq.retry_cam_doorbell_index = (adev->doorbell_index.ih + 3) << 1;
 335         WREG32_SOC15(OSSSYS, 0, mmIH_DOORBELL_RETRY_CAM,
 336                 vega20_setup_retry_doorbell(adev->irq.retry_cam_doorbell_index));
 337
 338         /* Enable IH Retry CAM */
 339         if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 0) ||
 340             amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2))
 341                 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL_ALDEBARAN,
 342                                ENABLE, 1);
 343         else
 344                 WREG32_FIELD15(OSSSYS, 0, IH_RETRY_INT_CAM_CNTL, ENABLE, 1);
 345
 346         adev->irq.retry_cam_enabled = true;
 347
 348         /* enable interrupts */
 349         ret = vega20_ih_toggle_interrupts(adev, true);
 350         if (ret)
 351                 return ret;
 352
 353         if (adev->irq.ih_soft.ring_size)
 354                 adev->irq.ih_soft.enabled = true;
 355
 356         return 0;
 357 }
 358
 359 /**
 360  * vega20_ih_irq_disable - disable interrupts
 361  *
 362  * @adev: amdgpu_device pointer
 363  *
 364  * Disable interrupts on the hw (VEGA20).
 365  */
 366 static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 367 {
 368         vega20_ih_toggle_interrupts(adev, false);
 369
 370         /* Wait and acknowledge irq */
 371         mdelay(1);
 372 }
 373
 374 /**
 375  * vega20_ih_get_wptr - get the IH ring buffer wptr
 376  *
 377  * @adev: amdgpu_device pointer
 378  * @ih: amdgpu_ih_ring pointer
 379  *
 380  * Get the IH ring buffer wptr from either the register
 381  * or the writeback memory buffer (VEGA20).  Also check for
 382  * ring buffer overflow and deal with it.
 383  * Returns the value of the wptr.
 384  */
 385 static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 386                               struct amdgpu_ih_ring *ih)
 387 {
 388         u32 wptr, tmp;
 389         struct amdgpu_ih_regs *ih_regs;
 390
 391         if (ih == &adev->irq.ih || ih == &adev->irq.ih_soft) {
 392                 /* Only ring0 supports writeback. On other rings fall back
 393                  * to register-based code with overflow checking below.
 394                  * ih_soft ring doesn't have any backing hardware registers,
 395                  * update wptr and return.
 396                  */
 397                 wptr = le32_to_cpu(*ih->wptr_cpu);
 398
 399                 if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 400                         goto out;
 401         }
 402
 403         ih_regs = &ih->ih_regs;
 404
 405         /* Double check that the overflow wasn't already cleared. */
 406         wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 407         if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 408                 goto out;
 409
 410         wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 411
 412         /* When a ring buffer overflow happen start parsing interrupt
 413          * from the last not overwritten vector (wptr + 32). Hopefully
 414          * this should allow us to catchup.
 415          */
 416         tmp = (wptr + 32) & ih->ptr_mask;
 417         dev_warn(adev->dev, "IH ring buffer overflow "
 418                  "(0x%08X, 0x%08X, 0x%08X)\n",
 419                  wptr, ih->rptr, tmp);
 420         ih->rptr = tmp;
 421
 422         tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 423         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 424         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 425
 426         /* Unset the CLEAR_OVERFLOW bit immediately so new overflows
 427          * can be detected.
 428          */
 429         tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 0);
 430         WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 431
 432 out:
 433         return (wptr & ih->ptr_mask);
 434 }
 435
 436 /**
 437  * vega20_ih_irq_rearm - rearm IRQ if lost
 438  *
 439  * @adev: amdgpu_device pointer
 440  * @ih: amdgpu_ih_ring pointer
 441  *
 442  */
 443 static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 444                                struct amdgpu_ih_ring *ih)
 445 {
 446         uint32_t v = 0;
 447         uint32_t i = 0;
 448         struct amdgpu_ih_regs *ih_regs;
 449
 450         ih_regs = &ih->ih_regs;
 451
 452         /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 453         for (i = 0; i < MAX_REARM_RETRY; i++) {
 454                 v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 455                 if ((v < ih->ring_size) && (v != ih->rptr))
 456                         WDOORBELL32(ih->doorbell_index, ih->rptr);
 457                 else
 458                         break;
 459         }
 460 }
 461
 462 /**
 463  * vega20_ih_set_rptr - set the IH ring buffer rptr
 464  *
 465  * @adev: amdgpu_device pointer
 466  * @ih: amdgpu_ih_ring pointer
 467  *
 468  * Set the IH ring buffer rptr.
 469  */
 470 static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 471                                struct amdgpu_ih_ring *ih)
 472 {
 473         struct amdgpu_ih_regs *ih_regs;
 474
 475         if (ih == &adev->irq.ih_soft)
 476                 return;
 477
 478         if (ih->use_doorbell) {
 479                 /* XXX check if swapping is necessary on BE */
 480                 *ih->rptr_cpu = ih->rptr;
 481                 WDOORBELL32(ih->doorbell_index, ih->rptr);
 482
 483                 if (amdgpu_sriov_vf(adev))
 484                         vega20_ih_irq_rearm(adev, ih);
 485         } else {
 486                 ih_regs = &ih->ih_regs;
 487                 WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 488         }
 489 }
 490
 491 /**
 492  * vega20_ih_self_irq - dispatch work for ring 1 and 2
 493  *
 494  * @adev: amdgpu_device pointer
 495  * @source: irq source
 496  * @entry: IV with WPTR update
 497  *
 498  * Update the WPTR from the IV and schedule work to handle the entries.
 499  */
 500 static int vega20_ih_self_irq(struct amdgpu_device *adev,
 501                               struct amdgpu_irq_src *source,
 502                               struct amdgpu_iv_entry *entry)
 503 {
 504         switch (entry->ring_id) {
 505         case 1:
 506                 schedule_work(&adev->irq.ih1_work);
 507                 break;
 508         case 2:
 509                 schedule_work(&adev->irq.ih2_work);
 510                 break;
 511         default:
 512                 break;
 513         }
 514         return 0;
 515 }
 516
 517 static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 518         .process = vega20_ih_self_irq,
 519 };
 520
 521 static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 522 {
 523         adev->irq.self_irq.num_types = 0;
 524         adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 525 }
 526
 527 static int vega20_ih_early_init(void *handle)
 528 {
 529         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 530
 531         vega20_ih_set_interrupt_funcs(adev);
 532         vega20_ih_set_self_irq_funcs(adev);
 533         return 0;
 534 }
 535
 536 static int vega20_ih_sw_init(void *handle)
 537 {
 538         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 539         bool use_bus_addr = true;
 540         int r;
 541
 542         r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 543                               &adev->irq.self_irq);
 544         if (r)
 545                 return r;
 546
 547         if ((adev->flags & AMD_IS_APU) &&
 548             (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) == IP_VERSION(4, 4, 2)))
 549                 use_bus_addr = false;
 550
 551         r = amdgpu_ih_ring_init(adev, &adev->irq.ih, IH_RING_SIZE, use_bus_addr);
 552         if (r)
 553                 return r;
 554
 555         adev->irq.ih.use_doorbell = true;
 556         adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 557
 558         r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, use_bus_addr);
 559         if (r)
 560                 return r;
 561
 562         adev->irq.ih1.use_doorbell = true;
 563         adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 564
 565         if (amdgpu_ip_version(adev, OSSSYS_HWIP, 0) != IP_VERSION(4, 4, 2)) {
 566                 r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 567                 if (r)
 568                         return r;
 569
 570                 adev->irq.ih2.use_doorbell = true;
 571                 adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 572         }
 573
 574         /* initialize ih control registers offset */
 575         vega20_ih_init_register_offset(adev);
 576
 577         r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, IH_SW_RING_SIZE, use_bus_addr);
 578         if (r)
 579                 return r;
 580
 581         r = amdgpu_irq_init(adev);
 582
 583         return r;
 584 }
 585
 586 static int vega20_ih_sw_fini(void *handle)
 587 {
 588         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 589
 590         amdgpu_irq_fini_sw(adev);
 591
 592         return 0;
 593 }
 594
 595 static int vega20_ih_hw_init(void *handle)
 596 {
 597         int r;
 598         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 599
 600         r = vega20_ih_irq_init(adev);
 601         if (r)
 602                 return r;
 603
 604         return 0;
 605 }
 606
 607 static int vega20_ih_hw_fini(void *handle)
 608 {
 609         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 610
 611         vega20_ih_irq_disable(adev);
 612
 613         return 0;
 614 }
 615
 616 static int vega20_ih_suspend(void *handle)
 617 {
 618         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 619
 620         return vega20_ih_hw_fini(adev);
 621 }
 622
 623 static int vega20_ih_resume(void *handle)
 624 {
 625         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 626
 627         return vega20_ih_hw_init(adev);
 628 }
 629
 630 static bool vega20_ih_is_idle(void *handle)
 631 {
 632         /* todo */
 633         return true;
 634 }
 635
 636 static int vega20_ih_wait_for_idle(void *handle)
 637 {
 638         /* todo */
 639         return -ETIMEDOUT;
 640 }
 641
 642 static int vega20_ih_soft_reset(void *handle)
 643 {
 644         /* todo */
 645
 646         return 0;
 647 }
 648
 649 static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 650                                                bool enable)
 651 {
 652         uint32_t data, def, field_val;
 653
 654         if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 655                 def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 656                 field_val = enable ? 0 : 1;
 657                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 658                                      IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 659                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 660                                      IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 661                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 662                                      DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 663                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 664                                      OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 665                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 666                                      LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 667                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 668                                      DYN_CLK_SOFT_OVERRIDE, field_val);
 669                 data = REG_SET_FIELD(data, IH_CLK_CTRL,
 670                                      REG_CLK_SOFT_OVERRIDE, field_val);
 671                 if (def != data)
 672                         WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 673         }
 674 }
 675
 676 static int vega20_ih_set_clockgating_state(void *handle,
 677                                           enum amd_clockgating_state state)
 678 {
 679         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 680
 681         vega20_ih_update_clockgating_state(adev,
 682                                 state == AMD_CG_STATE_GATE);
 683         return 0;
 684
 685 }
 686
 687 static int vega20_ih_set_powergating_state(void *handle,
 688                                           enum amd_powergating_state state)
 689 {
 690         return 0;
 691 }
 692
 693 const struct amd_ip_funcs vega20_ih_ip_funcs = {
 694         .name = "vega20_ih",
 695         .early_init = vega20_ih_early_init,
 696         .late_init = NULL,
 697         .sw_init = vega20_ih_sw_init,
 698         .sw_fini = vega20_ih_sw_fini,
 699         .hw_init = vega20_ih_hw_init,
 700         .hw_fini = vega20_ih_hw_fini,
 701         .suspend = vega20_ih_suspend,
 702         .resume = vega20_ih_resume,
 703         .is_idle = vega20_ih_is_idle,
 704         .wait_for_idle = vega20_ih_wait_for_idle,
 705         .soft_reset = vega20_ih_soft_reset,
 706         .set_clockgating_state = vega20_ih_set_clockgating_state,
 707         .set_powergating_state = vega20_ih_set_powergating_state,
 708 };
 709
 710 static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 711         .get_wptr = vega20_ih_get_wptr,
 712         .decode_iv = amdgpu_ih_decode_iv_helper,
 713         .decode_iv_ts = amdgpu_ih_decode_iv_ts_helper,
 714         .set_rptr = vega20_ih_set_rptr
 715 };
 716
 717 static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 718 {
 719         adev->irq.ih_funcs = &vega20_ih_funcs;
 720 }
 721
 722 const struct amdgpu_ip_block_version vega20_ih_ip_block = {
 723         .type = AMD_IP_BLOCK_TYPE_IH,
 724         .major = 4,
 725         .minor = 2,
 726         .rev = 0,
 727         .funcs = &vega20_ih_ip_funcs,
 728 };