LXR linux/drivers/gpu/drm/amd/amdgpu/vega20

   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
  41static 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 */
  50static 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 */
  99static 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 */
 145static 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
 162static 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
 185static 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 */
 212static 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 */
 263static 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->asic_type >= CHIP_ARCTURUS) {
 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 */
 297static 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->asic_type == CHIP_ARCTURUS &&
 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->asic_type == CHIP_ALDEBARAN) {
 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        pci_set_master(adev->pdev);
 344
 345        /* enable interrupts */
 346        ret = vega20_ih_toggle_interrupts(adev, true);
 347        if (ret)
 348                return ret;
 349
 350        if (adev->irq.ih_soft.ring_size)
 351                adev->irq.ih_soft.enabled = true;
 352
 353        return 0;
 354}
 355
 356/**
 357 * vega20_ih_irq_disable - disable interrupts
 358 *
 359 * @adev: amdgpu_device pointer
 360 *
 361 * Disable interrupts on the hw (VEGA20).
 362 */
 363static void vega20_ih_irq_disable(struct amdgpu_device *adev)
 364{
 365        vega20_ih_toggle_interrupts(adev, false);
 366
 367        /* Wait and acknowledge irq */
 368        mdelay(1);
 369}
 370
 371/**
 372 * vega20_ih_get_wptr - get the IH ring buffer wptr
 373 *
 374 * @adev: amdgpu_device pointer
 375 * @ih: amdgpu_ih_ring pointer
 376 *
 377 * Get the IH ring buffer wptr from either the register
 378 * or the writeback memory buffer (VEGA20).  Also check for
 379 * ring buffer overflow and deal with it.
 380 * Returns the value of the wptr.
 381 */
 382static u32 vega20_ih_get_wptr(struct amdgpu_device *adev,
 383                              struct amdgpu_ih_ring *ih)
 384{
 385        u32 wptr, tmp;
 386        struct amdgpu_ih_regs *ih_regs;
 387
 388        if (ih == &adev->irq.ih) {
 389                /* Only ring0 supports writeback. On other rings fall back
 390                 * to register-based code with overflow checking below.
 391                 */
 392                wptr = le32_to_cpu(*ih->wptr_cpu);
 393
 394                if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 395                        goto out;
 396        }
 397
 398        ih_regs = &ih->ih_regs;
 399
 400        /* Double check that the overflow wasn't already cleared. */
 401        wptr = RREG32_NO_KIQ(ih_regs->ih_rb_wptr);
 402        if (!REG_GET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW))
 403                goto out;
 404
 405        wptr = REG_SET_FIELD(wptr, IH_RB_WPTR, RB_OVERFLOW, 0);
 406
 407        /* When a ring buffer overflow happen start parsing interrupt
 408         * from the last not overwritten vector (wptr + 32). Hopefully
 409         * this should allow us to catchup.
 410         */
 411        tmp = (wptr + 32) & ih->ptr_mask;
 412        dev_warn(adev->dev, "IH ring buffer overflow "
 413                 "(0x%08X, 0x%08X, 0x%08X)\n",
 414                 wptr, ih->rptr, tmp);
 415        ih->rptr = tmp;
 416
 417        tmp = RREG32_NO_KIQ(ih_regs->ih_rb_cntl);
 418        tmp = REG_SET_FIELD(tmp, IH_RB_CNTL, WPTR_OVERFLOW_CLEAR, 1);
 419        WREG32_NO_KIQ(ih_regs->ih_rb_cntl, tmp);
 420
 421out:
 422        return (wptr & ih->ptr_mask);
 423}
 424
 425/**
 426 * vega20_ih_irq_rearm - rearm IRQ if lost
 427 *
 428 * @adev: amdgpu_device pointer
 429 * @ih: amdgpu_ih_ring pointer
 430 *
 431 */
 432static void vega20_ih_irq_rearm(struct amdgpu_device *adev,
 433                               struct amdgpu_ih_ring *ih)
 434{
 435        uint32_t v = 0;
 436        uint32_t i = 0;
 437        struct amdgpu_ih_regs *ih_regs;
 438
 439        ih_regs = &ih->ih_regs;
 440
 441        /* Rearm IRQ / re-wwrite doorbell if doorbell write is lost */
 442        for (i = 0; i < MAX_REARM_RETRY; i++) {
 443                v = RREG32_NO_KIQ(ih_regs->ih_rb_rptr);
 444                if ((v < ih->ring_size) && (v != ih->rptr))
 445                        WDOORBELL32(ih->doorbell_index, ih->rptr);
 446                else
 447                        break;
 448        }
 449}
 450
 451/**
 452 * vega20_ih_set_rptr - set the IH ring buffer rptr
 453 *
 454 * @adev: amdgpu_device pointer
 455 * @ih: amdgpu_ih_ring pointer
 456 *
 457 * Set the IH ring buffer rptr.
 458 */
 459static void vega20_ih_set_rptr(struct amdgpu_device *adev,
 460                               struct amdgpu_ih_ring *ih)
 461{
 462        struct amdgpu_ih_regs *ih_regs;
 463
 464        if (ih->use_doorbell) {
 465                /* XXX check if swapping is necessary on BE */
 466                *ih->rptr_cpu = ih->rptr;
 467                WDOORBELL32(ih->doorbell_index, ih->rptr);
 468
 469                if (amdgpu_sriov_vf(adev))
 470                        vega20_ih_irq_rearm(adev, ih);
 471        } else {
 472                ih_regs = &ih->ih_regs;
 473                WREG32(ih_regs->ih_rb_rptr, ih->rptr);
 474        }
 475}
 476
 477/**
 478 * vega20_ih_self_irq - dispatch work for ring 1 and 2
 479 *
 480 * @adev: amdgpu_device pointer
 481 * @source: irq source
 482 * @entry: IV with WPTR update
 483 *
 484 * Update the WPTR from the IV and schedule work to handle the entries.
 485 */
 486static int vega20_ih_self_irq(struct amdgpu_device *adev,
 487                              struct amdgpu_irq_src *source,
 488                              struct amdgpu_iv_entry *entry)
 489{
 490        switch (entry->ring_id) {
 491        case 1:
 492                schedule_work(&adev->irq.ih1_work);
 493                break;
 494        case 2:
 495                schedule_work(&adev->irq.ih2_work);
 496                break;
 497        default: break;
 498        }
 499        return 0;
 500}
 501
 502static const struct amdgpu_irq_src_funcs vega20_ih_self_irq_funcs = {
 503        .process = vega20_ih_self_irq,
 504};
 505
 506static void vega20_ih_set_self_irq_funcs(struct amdgpu_device *adev)
 507{
 508        adev->irq.self_irq.num_types = 0;
 509        adev->irq.self_irq.funcs = &vega20_ih_self_irq_funcs;
 510}
 511
 512static int vega20_ih_early_init(void *handle)
 513{
 514        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 515
 516        vega20_ih_set_interrupt_funcs(adev);
 517        vega20_ih_set_self_irq_funcs(adev);
 518        return 0;
 519}
 520
 521static int vega20_ih_sw_init(void *handle)
 522{
 523        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 524        int r;
 525
 526        r = amdgpu_irq_add_id(adev, SOC15_IH_CLIENTID_IH, 0,
 527                              &adev->irq.self_irq);
 528        if (r)
 529                return r;
 530
 531        r = amdgpu_ih_ring_init(adev, &adev->irq.ih, 256 * 1024, true);
 532        if (r)
 533                return r;
 534
 535        adev->irq.ih.use_doorbell = true;
 536        adev->irq.ih.doorbell_index = adev->doorbell_index.ih << 1;
 537
 538        r = amdgpu_ih_ring_init(adev, &adev->irq.ih1, PAGE_SIZE, true);
 539        if (r)
 540                return r;
 541
 542        adev->irq.ih1.use_doorbell = true;
 543        adev->irq.ih1.doorbell_index = (adev->doorbell_index.ih + 1) << 1;
 544
 545        r = amdgpu_ih_ring_init(adev, &adev->irq.ih2, PAGE_SIZE, true);
 546        if (r)
 547                return r;
 548
 549        adev->irq.ih2.use_doorbell = true;
 550        adev->irq.ih2.doorbell_index = (adev->doorbell_index.ih + 2) << 1;
 551
 552        /* initialize ih control registers offset */
 553        vega20_ih_init_register_offset(adev);
 554
 555        r = amdgpu_ih_ring_init(adev, &adev->irq.ih_soft, PAGE_SIZE, true);
 556        if (r)
 557                return r;
 558
 559        r = amdgpu_irq_init(adev);
 560
 561        return r;
 562}
 563
 564static int vega20_ih_sw_fini(void *handle)
 565{
 566        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 567
 568        amdgpu_irq_fini_sw(adev);
 569
 570        return 0;
 571}
 572
 573static int vega20_ih_hw_init(void *handle)
 574{
 575        int r;
 576        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 577
 578        r = vega20_ih_irq_init(adev);
 579        if (r)
 580                return r;
 581
 582        return 0;
 583}
 584
 585static int vega20_ih_hw_fini(void *handle)
 586{
 587        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 588
 589        vega20_ih_irq_disable(adev);
 590
 591        return 0;
 592}
 593
 594static int vega20_ih_suspend(void *handle)
 595{
 596        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 597
 598        return vega20_ih_hw_fini(adev);
 599}
 600
 601static int vega20_ih_resume(void *handle)
 602{
 603        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 604
 605        return vega20_ih_hw_init(adev);
 606}
 607
 608static bool vega20_ih_is_idle(void *handle)
 609{
 610        /* todo */
 611        return true;
 612}
 613
 614static int vega20_ih_wait_for_idle(void *handle)
 615{
 616        /* todo */
 617        return -ETIMEDOUT;
 618}
 619
 620static int vega20_ih_soft_reset(void *handle)
 621{
 622        /* todo */
 623
 624        return 0;
 625}
 626
 627static void vega20_ih_update_clockgating_state(struct amdgpu_device *adev,
 628                                               bool enable)
 629{
 630        uint32_t data, def, field_val;
 631
 632        if (adev->cg_flags & AMD_CG_SUPPORT_IH_CG) {
 633                def = data = RREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL);
 634                field_val = enable ? 0 : 1;
 635                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 636                                     IH_RETRY_INT_CAM_MEM_CLK_SOFT_OVERRIDE, field_val);
 637                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 638                                     IH_BUFFER_MEM_CLK_SOFT_OVERRIDE, field_val);
 639                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 640                                     DBUS_MUX_CLK_SOFT_OVERRIDE, field_val);
 641                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 642                                     OSSSYS_SHARE_CLK_SOFT_OVERRIDE, field_val);
 643                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 644                                     LIMIT_SMN_CLK_SOFT_OVERRIDE, field_val);
 645                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 646                                     DYN_CLK_SOFT_OVERRIDE, field_val);
 647                data = REG_SET_FIELD(data, IH_CLK_CTRL,
 648                                     REG_CLK_SOFT_OVERRIDE, field_val);
 649                if (def != data)
 650                        WREG32_SOC15(OSSSYS, 0, mmIH_CLK_CTRL, data);
 651        }
 652}
 653
 654static int vega20_ih_set_clockgating_state(void *handle,
 655                                          enum amd_clockgating_state state)
 656{
 657        struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 658
 659        vega20_ih_update_clockgating_state(adev,
 660                                state == AMD_CG_STATE_GATE);
 661        return 0;
 662
 663}
 664
 665static int vega20_ih_set_powergating_state(void *handle,
 666                                          enum amd_powergating_state state)
 667{
 668        return 0;
 669}
 670
 671const struct amd_ip_funcs vega20_ih_ip_funcs = {
 672        .name = "vega20_ih",
 673        .early_init = vega20_ih_early_init,
 674        .late_init = NULL,
 675        .sw_init = vega20_ih_sw_init,
 676        .sw_fini = vega20_ih_sw_fini,
 677        .hw_init = vega20_ih_hw_init,
 678        .hw_fini = vega20_ih_hw_fini,
 679        .suspend = vega20_ih_suspend,
 680        .resume = vega20_ih_resume,
 681        .is_idle = vega20_ih_is_idle,
 682        .wait_for_idle = vega20_ih_wait_for_idle,
 683        .soft_reset = vega20_ih_soft_reset,
 684        .set_clockgating_state = vega20_ih_set_clockgating_state,
 685        .set_powergating_state = vega20_ih_set_powergating_state,
 686};
 687
 688static const struct amdgpu_ih_funcs vega20_ih_funcs = {
 689        .get_wptr = vega20_ih_get_wptr,
 690        .decode_iv = amdgpu_ih_decode_iv_helper,
 691        .set_rptr = vega20_ih_set_rptr
 692};
 693
 694static void vega20_ih_set_interrupt_funcs(struct amdgpu_device *adev)
 695{
 696        adev->irq.ih_funcs = &vega20_ih_funcs;
 697}
 698
 699const struct amdgpu_ip_block_version vega20_ih_ip_block =
 700{
 701        .type = AMD_IP_BLOCK_TYPE_IH,
 702        .major = 4,
 703        .minor = 2,
 704        .rev = 0,
 705        .funcs = &vega20_ih_ip_funcs,
 706};
 707