drivers/gpu/drm/amd/amdgpu/si_dma.c

   1 /*
   2  * Copyright 2015 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  * Authors: Alex Deucher
  23  */
  24
  25 #include "amdgpu.h"
  26 #include "amdgpu_trace.h"
  27 #include "si.h"
  28 #include "sid.h"
  29
  30 const u32 sdma_offsets[SDMA_MAX_INSTANCE] =
  31 {
  32         DMA0_REGISTER_OFFSET,
  33         DMA1_REGISTER_OFFSET
  34 };
  35
  36 static void si_dma_set_ring_funcs(struct amdgpu_device *adev);
  37 static void si_dma_set_buffer_funcs(struct amdgpu_device *adev);
  38 static void si_dma_set_vm_pte_funcs(struct amdgpu_device *adev);
  39 static void si_dma_set_irq_funcs(struct amdgpu_device *adev);
  40
  41 static uint64_t si_dma_ring_get_rptr(struct amdgpu_ring *ring)
  42 {
  43         return ring->adev->wb.wb[ring->rptr_offs>>2];
  44 }
  45
  46 static uint64_t si_dma_ring_get_wptr(struct amdgpu_ring *ring)
  47 {
  48         struct amdgpu_device *adev = ring->adev;
  49         u32 me = (ring == &adev->sdma.instance[0].ring) ? 0 : 1;
  50
  51         return (RREG32(DMA_RB_WPTR + sdma_offsets[me]) & 0x3fffc) >> 2;
  52 }
  53
  54 static void si_dma_ring_set_wptr(struct amdgpu_ring *ring)
  55 {
  56         struct amdgpu_device *adev = ring->adev;
  57         u32 me = (ring == &adev->sdma.instance[0].ring) ? 0 : 1;
  58
  59         WREG32(DMA_RB_WPTR + sdma_offsets[me],
  60                (lower_32_bits(ring->wptr) << 2) & 0x3fffc);
  61 }
  62
  63 static void si_dma_ring_emit_ib(struct amdgpu_ring *ring,
  64                                 struct amdgpu_job *job,
  65                                 struct amdgpu_ib *ib,
  66                                 uint32_t flags)
  67 {
  68         unsigned vmid = AMDGPU_JOB_GET_VMID(job);
  69         /* The indirect buffer packet must end on an 8 DW boundary in the DMA ring.
  70          * Pad as necessary with NOPs.
  71          */
  72         while ((lower_32_bits(ring->wptr) & 7) != 5)
  73                 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0));
  74         amdgpu_ring_write(ring, DMA_IB_PACKET(DMA_PACKET_INDIRECT_BUFFER, vmid, 0));
  75         amdgpu_ring_write(ring, (ib->gpu_addr & 0xFFFFFFE0));
  76         amdgpu_ring_write(ring, (ib->length_dw << 12) | (upper_32_bits(ib->gpu_addr) & 0xFF));
  77
  78 }
  79
  80 /**
  81  * si_dma_ring_emit_fence - emit a fence on the DMA ring
  82  *
  83  * @ring: amdgpu ring pointer
  84  * @fence: amdgpu fence object
  85  *
  86  * Add a DMA fence packet to the ring to write
  87  * the fence seq number and DMA trap packet to generate
  88  * an interrupt if needed (VI).
  89  */
  90 static void si_dma_ring_emit_fence(struct amdgpu_ring *ring, u64 addr, u64 seq,
  91                                       unsigned flags)
  92 {
  93
  94         bool write64bit = flags & AMDGPU_FENCE_FLAG_64BIT;
  95         /* write the fence */
  96         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0, 0));
  97         amdgpu_ring_write(ring, addr & 0xfffffffc);
  98         amdgpu_ring_write(ring, (upper_32_bits(addr) & 0xff));
  99         amdgpu_ring_write(ring, seq);
 100         /* optionally write high bits as well */
 101         if (write64bit) {
 102                 addr += 4;
 103                 amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_FENCE, 0, 0, 0, 0));
 104                 amdgpu_ring_write(ring, addr & 0xfffffffc);
 105                 amdgpu_ring_write(ring, (upper_32_bits(addr) & 0xff));
 106                 amdgpu_ring_write(ring, upper_32_bits(seq));
 107         }
 108         /* generate an interrupt */
 109         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_TRAP, 0, 0, 0, 0));
 110 }
 111
 112 static void si_dma_stop(struct amdgpu_device *adev)
 113 {
 114         struct amdgpu_ring *ring;
 115         u32 rb_cntl;
 116         unsigned i;
 117
 118         for (i = 0; i < adev->sdma.num_instances; i++) {
 119                 ring = &adev->sdma.instance[i].ring;
 120                 /* dma0 */
 121                 rb_cntl = RREG32(DMA_RB_CNTL + sdma_offsets[i]);
 122                 rb_cntl &= ~DMA_RB_ENABLE;
 123                 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);
 124
 125                 if (adev->mman.buffer_funcs_ring == ring)
 126                         amdgpu_ttm_set_buffer_funcs_status(adev, false);
 127                 ring->sched.ready = false;
 128         }
 129 }
 130
 131 static int si_dma_start(struct amdgpu_device *adev)
 132 {
 133         struct amdgpu_ring *ring;
 134         u32 rb_cntl, dma_cntl, ib_cntl, rb_bufsz;
 135         int i, r;
 136         uint64_t rptr_addr;
 137
 138         for (i = 0; i < adev->sdma.num_instances; i++) {
 139                 ring = &adev->sdma.instance[i].ring;
 140
 141                 WREG32(DMA_SEM_INCOMPLETE_TIMER_CNTL + sdma_offsets[i], 0);
 142                 WREG32(DMA_SEM_WAIT_FAIL_TIMER_CNTL + sdma_offsets[i], 0);
 143
 144                 /* Set ring buffer size in dwords */
 145                 rb_bufsz = order_base_2(ring->ring_size / 4);
 146                 rb_cntl = rb_bufsz << 1;
 147 #ifdef __BIG_ENDIAN
 148                 rb_cntl |= DMA_RB_SWAP_ENABLE | DMA_RPTR_WRITEBACK_SWAP_ENABLE;
 149 #endif
 150                 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl);
 151
 152                 /* Initialize the ring buffer's read and write pointers */
 153                 WREG32(DMA_RB_RPTR + sdma_offsets[i], 0);
 154                 WREG32(DMA_RB_WPTR + sdma_offsets[i], 0);
 155
 156                 rptr_addr = adev->wb.gpu_addr + (ring->rptr_offs * 4);
 157
 158                 WREG32(DMA_RB_RPTR_ADDR_LO + sdma_offsets[i], lower_32_bits(rptr_addr));
 159                 WREG32(DMA_RB_RPTR_ADDR_HI + sdma_offsets[i], upper_32_bits(rptr_addr) & 0xFF);
 160
 161                 rb_cntl |= DMA_RPTR_WRITEBACK_ENABLE;
 162
 163                 WREG32(DMA_RB_BASE + sdma_offsets[i], ring->gpu_addr >> 8);
 164
 165                 /* enable DMA IBs */
 166                 ib_cntl = DMA_IB_ENABLE | CMD_VMID_FORCE;
 167 #ifdef __BIG_ENDIAN
 168                 ib_cntl |= DMA_IB_SWAP_ENABLE;
 169 #endif
 170                 WREG32(DMA_IB_CNTL + sdma_offsets[i], ib_cntl);
 171
 172                 dma_cntl = RREG32(DMA_CNTL + sdma_offsets[i]);
 173                 dma_cntl &= ~CTXEMPTY_INT_ENABLE;
 174                 WREG32(DMA_CNTL + sdma_offsets[i], dma_cntl);
 175
 176                 ring->wptr = 0;
 177                 WREG32(DMA_RB_WPTR + sdma_offsets[i], lower_32_bits(ring->wptr) << 2);
 178                 WREG32(DMA_RB_CNTL + sdma_offsets[i], rb_cntl | DMA_RB_ENABLE);
 179
 180                 ring->sched.ready = true;
 181
 182                 r = amdgpu_ring_test_helper(ring);
 183                 if (r)
 184                         return r;
 185
 186                 if (adev->mman.buffer_funcs_ring == ring)
 187                         amdgpu_ttm_set_buffer_funcs_status(adev, true);
 188         }
 189
 190         return 0;
 191 }
 192
 193 /**
 194  * si_dma_ring_test_ring - simple async dma engine test
 195  *
 196  * @ring: amdgpu_ring structure holding ring information
 197  *
 198  * Test the DMA engine by writing using it to write an
 199  * value to memory. (VI).
 200  * Returns 0 for success, error for failure.
 201  */
 202 static int si_dma_ring_test_ring(struct amdgpu_ring *ring)
 203 {
 204         struct amdgpu_device *adev = ring->adev;
 205         unsigned i;
 206         unsigned index;
 207         int r;
 208         u32 tmp;
 209         u64 gpu_addr;
 210
 211         r = amdgpu_device_wb_get(adev, &index);
 212         if (r)
 213                 return r;
 214
 215         gpu_addr = adev->wb.gpu_addr + (index * 4);
 216         tmp = 0xCAFEDEAD;
 217         adev->wb.wb[index] = cpu_to_le32(tmp);
 218
 219         r = amdgpu_ring_alloc(ring, 4);
 220         if (r)
 221                 goto error_free_wb;
 222
 223         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, 1));
 224         amdgpu_ring_write(ring, lower_32_bits(gpu_addr));
 225         amdgpu_ring_write(ring, upper_32_bits(gpu_addr) & 0xff);
 226         amdgpu_ring_write(ring, 0xDEADBEEF);
 227         amdgpu_ring_commit(ring);
 228
 229         for (i = 0; i < adev->usec_timeout; i++) {
 230                 tmp = le32_to_cpu(adev->wb.wb[index]);
 231                 if (tmp == 0xDEADBEEF)
 232                         break;
 233                 udelay(1);
 234         }
 235
 236         if (i >= adev->usec_timeout)
 237                 r = -ETIMEDOUT;
 238
 239 error_free_wb:
 240         amdgpu_device_wb_free(adev, index);
 241         return r;
 242 }
 243
 244 /**
 245  * si_dma_ring_test_ib - test an IB on the DMA engine
 246  *
 247  * @ring: amdgpu_ring structure holding ring information
 248  *
 249  * Test a simple IB in the DMA ring (VI).
 250  * Returns 0 on success, error on failure.
 251  */
 252 static int si_dma_ring_test_ib(struct amdgpu_ring *ring, long timeout)
 253 {
 254         struct amdgpu_device *adev = ring->adev;
 255         struct amdgpu_ib ib;
 256         struct dma_fence *f = NULL;
 257         unsigned index;
 258         u32 tmp = 0;
 259         u64 gpu_addr;
 260         long r;
 261
 262         r = amdgpu_device_wb_get(adev, &index);
 263         if (r)
 264                 return r;
 265
 266         gpu_addr = adev->wb.gpu_addr + (index * 4);
 267         tmp = 0xCAFEDEAD;
 268         adev->wb.wb[index] = cpu_to_le32(tmp);
 269         memset(&ib, 0, sizeof(ib));
 270         r = amdgpu_ib_get(adev, NULL, 256, &ib);
 271         if (r)
 272                 goto err0;
 273
 274         ib.ptr[0] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, 1);
 275         ib.ptr[1] = lower_32_bits(gpu_addr);
 276         ib.ptr[2] = upper_32_bits(gpu_addr) & 0xff;
 277         ib.ptr[3] = 0xDEADBEEF;
 278         ib.length_dw = 4;
 279         r = amdgpu_ib_schedule(ring, 1, &ib, NULL, &f);
 280         if (r)
 281                 goto err1;
 282
 283         r = dma_fence_wait_timeout(f, false, timeout);
 284         if (r == 0) {
 285                 r = -ETIMEDOUT;
 286                 goto err1;
 287         } else if (r < 0) {
 288                 goto err1;
 289         }
 290         tmp = le32_to_cpu(adev->wb.wb[index]);
 291         if (tmp == 0xDEADBEEF)
 292                 r = 0;
 293         else
 294                 r = -EINVAL;
 295
 296 err1:
 297         amdgpu_ib_free(adev, &ib, NULL);
 298         dma_fence_put(f);
 299 err0:
 300         amdgpu_device_wb_free(adev, index);
 301         return r;
 302 }
 303
 304 /**
 305  * cik_dma_vm_copy_pte - update PTEs by copying them from the GART
 306  *
 307  * @ib: indirect buffer to fill with commands
 308  * @pe: addr of the page entry
 309  * @src: src addr to copy from
 310  * @count: number of page entries to update
 311  *
 312  * Update PTEs by copying them from the GART using DMA (SI).
 313  */
 314 static void si_dma_vm_copy_pte(struct amdgpu_ib *ib,
 315                                uint64_t pe, uint64_t src,
 316                                unsigned count)
 317 {
 318         unsigned bytes = count * 8;
 319
 320         ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
 321                                               1, 0, 0, bytes);
 322         ib->ptr[ib->length_dw++] = lower_32_bits(pe);
 323         ib->ptr[ib->length_dw++] = lower_32_bits(src);
 324         ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
 325         ib->ptr[ib->length_dw++] = upper_32_bits(src) & 0xff;
 326 }
 327
 328 /**
 329  * si_dma_vm_write_pte - update PTEs by writing them manually
 330  *
 331  * @ib: indirect buffer to fill with commands
 332  * @pe: addr of the page entry
 333  * @value: dst addr to write into pe
 334  * @count: number of page entries to update
 335  * @incr: increase next addr by incr bytes
 336  *
 337  * Update PTEs by writing them manually using DMA (SI).
 338  */
 339 static void si_dma_vm_write_pte(struct amdgpu_ib *ib, uint64_t pe,
 340                                 uint64_t value, unsigned count,
 341                                 uint32_t incr)
 342 {
 343         unsigned ndw = count * 2;
 344
 345         ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_WRITE, 0, 0, 0, ndw);
 346         ib->ptr[ib->length_dw++] = lower_32_bits(pe);
 347         ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 348         for (; ndw > 0; ndw -= 2) {
 349                 ib->ptr[ib->length_dw++] = lower_32_bits(value);
 350                 ib->ptr[ib->length_dw++] = upper_32_bits(value);
 351                 value += incr;
 352         }
 353 }
 354
 355 /**
 356  * si_dma_vm_set_pte_pde - update the page tables using sDMA
 357  *
 358  * @ib: indirect buffer to fill with commands
 359  * @pe: addr of the page entry
 360  * @addr: dst addr to write into pe
 361  * @count: number of page entries to update
 362  * @incr: increase next addr by incr bytes
 363  * @flags: access flags
 364  *
 365  * Update the page tables using sDMA (CIK).
 366  */
 367 static void si_dma_vm_set_pte_pde(struct amdgpu_ib *ib,
 368                                      uint64_t pe,
 369                                      uint64_t addr, unsigned count,
 370                                      uint32_t incr, uint64_t flags)
 371 {
 372         uint64_t value;
 373         unsigned ndw;
 374
 375         while (count) {
 376                 ndw = count * 2;
 377                 if (ndw > 0xFFFFE)
 378                         ndw = 0xFFFFE;
 379
 380                 if (flags & AMDGPU_PTE_VALID)
 381                         value = addr;
 382                 else
 383                         value = 0;
 384
 385                 /* for physically contiguous pages (vram) */
 386                 ib->ptr[ib->length_dw++] = DMA_PTE_PDE_PACKET(ndw);
 387                 ib->ptr[ib->length_dw++] = pe; /* dst addr */
 388                 ib->ptr[ib->length_dw++] = upper_32_bits(pe) & 0xff;
 389                 ib->ptr[ib->length_dw++] = lower_32_bits(flags); /* mask */
 390                 ib->ptr[ib->length_dw++] = upper_32_bits(flags);
 391                 ib->ptr[ib->length_dw++] = value; /* value */
 392                 ib->ptr[ib->length_dw++] = upper_32_bits(value);
 393                 ib->ptr[ib->length_dw++] = incr; /* increment size */
 394                 ib->ptr[ib->length_dw++] = 0;
 395                 pe += ndw * 4;
 396                 addr += (ndw / 2) * incr;
 397                 count -= ndw / 2;
 398         }
 399 }
 400
 401 /**
 402  * si_dma_pad_ib - pad the IB to the required number of dw
 403  *
 404  * @ib: indirect buffer to fill with padding
 405  *
 406  */
 407 static void si_dma_ring_pad_ib(struct amdgpu_ring *ring, struct amdgpu_ib *ib)
 408 {
 409         while (ib->length_dw & 0x7)
 410                 ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0);
 411 }
 412
 413 /**
 414  * cik_sdma_ring_emit_pipeline_sync - sync the pipeline
 415  *
 416  * @ring: amdgpu_ring pointer
 417  *
 418  * Make sure all previous operations are completed (CIK).
 419  */
 420 static void si_dma_ring_emit_pipeline_sync(struct amdgpu_ring *ring)
 421 {
 422         uint32_t seq = ring->fence_drv.sync_seq;
 423         uint64_t addr = ring->fence_drv.gpu_addr;
 424
 425         /* wait for idle */
 426         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_POLL_REG_MEM, 0, 0, 0, 0) |
 427                           (1 << 27)); /* Poll memory */
 428         amdgpu_ring_write(ring, lower_32_bits(addr));
 429         amdgpu_ring_write(ring, (0xff << 16) | upper_32_bits(addr)); /* retry, addr_hi */
 430         amdgpu_ring_write(ring, 0xffffffff); /* mask */
 431         amdgpu_ring_write(ring, seq); /* value */
 432         amdgpu_ring_write(ring, (3 << 28) | 0x20); /* func(equal) | poll interval */
 433 }
 434
 435 /**
 436  * si_dma_ring_emit_vm_flush - cik vm flush using sDMA
 437  *
 438  * @ring: amdgpu_ring pointer
 439  * @vm: amdgpu_vm pointer
 440  *
 441  * Update the page table base and flush the VM TLB
 442  * using sDMA (VI).
 443  */
 444 static void si_dma_ring_emit_vm_flush(struct amdgpu_ring *ring,
 445                                       unsigned vmid, uint64_t pd_addr)
 446 {
 447         amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
 448
 449         /* wait for invalidate to complete */
 450         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_POLL_REG_MEM, 0, 0, 0, 0));
 451         amdgpu_ring_write(ring, VM_INVALIDATE_REQUEST);
 452         amdgpu_ring_write(ring, 0xff << 16); /* retry */
 453         amdgpu_ring_write(ring, 1 << vmid); /* mask */
 454         amdgpu_ring_write(ring, 0); /* value */
 455         amdgpu_ring_write(ring, (0 << 28) | 0x20); /* func(always) | poll interval */
 456 }
 457
 458 static void si_dma_ring_emit_wreg(struct amdgpu_ring *ring,
 459                                   uint32_t reg, uint32_t val)
 460 {
 461         amdgpu_ring_write(ring, DMA_PACKET(DMA_PACKET_SRBM_WRITE, 0, 0, 0, 0));
 462         amdgpu_ring_write(ring, (0xf << 16) | reg);
 463         amdgpu_ring_write(ring, val);
 464 }
 465
 466 static int si_dma_early_init(void *handle)
 467 {
 468         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 469
 470         adev->sdma.num_instances = 2;
 471
 472         si_dma_set_ring_funcs(adev);
 473         si_dma_set_buffer_funcs(adev);
 474         si_dma_set_vm_pte_funcs(adev);
 475         si_dma_set_irq_funcs(adev);
 476
 477         return 0;
 478 }
 479
 480 static int si_dma_sw_init(void *handle)
 481 {
 482         struct amdgpu_ring *ring;
 483         int r, i;
 484         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 485
 486         /* DMA0 trap event */
 487         r = amdgpu_irq_add_id(adev, AMDGPU_IRQ_CLIENTID_LEGACY, 224,
 488                               &adev->sdma.trap_irq);
 489         if (r)
 490                 return r;
 491
 492         /* DMA1 trap event */
 493         r = amdgpu_irq_add_id(adev, AMDGPU_IRQ_CLIENTID_LEGACY, 244,
 494                               &adev->sdma.trap_irq);
 495         if (r)
 496                 return r;
 497
 498         for (i = 0; i < adev->sdma.num_instances; i++) {
 499                 ring = &adev->sdma.instance[i].ring;
 500                 ring->ring_obj = NULL;
 501                 ring->use_doorbell = false;
 502                 sprintf(ring->name, "sdma%d", i);
 503                 r = amdgpu_ring_init(adev, ring, 1024,
 504                                      &adev->sdma.trap_irq,
 505                                      (i == 0) ?
 506                                      AMDGPU_SDMA_IRQ_INSTANCE0 :
 507                                      AMDGPU_SDMA_IRQ_INSTANCE1);
 508                 if (r)
 509                         return r;
 510         }
 511
 512         return r;
 513 }
 514
 515 static int si_dma_sw_fini(void *handle)
 516 {
 517         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 518         int i;
 519
 520         for (i = 0; i < adev->sdma.num_instances; i++)
 521                 amdgpu_ring_fini(&adev->sdma.instance[i].ring);
 522
 523         return 0;
 524 }
 525
 526 static int si_dma_hw_init(void *handle)
 527 {
 528         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 529
 530         return si_dma_start(adev);
 531 }
 532
 533 static int si_dma_hw_fini(void *handle)
 534 {
 535         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 536
 537         si_dma_stop(adev);
 538
 539         return 0;
 540 }
 541
 542 static int si_dma_suspend(void *handle)
 543 {
 544         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 545
 546         return si_dma_hw_fini(adev);
 547 }
 548
 549 static int si_dma_resume(void *handle)
 550 {
 551         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 552
 553         return si_dma_hw_init(adev);
 554 }
 555
 556 static bool si_dma_is_idle(void *handle)
 557 {
 558         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 559         u32 tmp = RREG32(SRBM_STATUS2);
 560
 561         if (tmp & (DMA_BUSY_MASK | DMA1_BUSY_MASK))
 562             return false;
 563
 564         return true;
 565 }
 566
 567 static int si_dma_wait_for_idle(void *handle)
 568 {
 569         unsigned i;
 570         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 571
 572         for (i = 0; i < adev->usec_timeout; i++) {
 573                 if (si_dma_is_idle(handle))
 574                         return 0;
 575                 udelay(1);
 576         }
 577         return -ETIMEDOUT;
 578 }
 579
 580 static int si_dma_soft_reset(void *handle)
 581 {
 582         DRM_INFO("si_dma_soft_reset --- not implemented !!!!!!!\n");
 583         return 0;
 584 }
 585
 586 static int si_dma_set_trap_irq_state(struct amdgpu_device *adev,
 587                                         struct amdgpu_irq_src *src,
 588                                         unsigned type,
 589                                         enum amdgpu_interrupt_state state)
 590 {
 591         u32 sdma_cntl;
 592
 593         switch (type) {
 594         case AMDGPU_SDMA_IRQ_INSTANCE0:
 595                 switch (state) {
 596                 case AMDGPU_IRQ_STATE_DISABLE:
 597                         sdma_cntl = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET);
 598                         sdma_cntl &= ~TRAP_ENABLE;
 599                         WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, sdma_cntl);
 600                         break;
 601                 case AMDGPU_IRQ_STATE_ENABLE:
 602                         sdma_cntl = RREG32(DMA_CNTL + DMA0_REGISTER_OFFSET);
 603                         sdma_cntl |= TRAP_ENABLE;
 604                         WREG32(DMA_CNTL + DMA0_REGISTER_OFFSET, sdma_cntl);
 605                         break;
 606                 default:
 607                         break;
 608                 }
 609                 break;
 610         case AMDGPU_SDMA_IRQ_INSTANCE1:
 611                 switch (state) {
 612                 case AMDGPU_IRQ_STATE_DISABLE:
 613                         sdma_cntl = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET);
 614                         sdma_cntl &= ~TRAP_ENABLE;
 615                         WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, sdma_cntl);
 616                         break;
 617                 case AMDGPU_IRQ_STATE_ENABLE:
 618                         sdma_cntl = RREG32(DMA_CNTL + DMA1_REGISTER_OFFSET);
 619                         sdma_cntl |= TRAP_ENABLE;
 620                         WREG32(DMA_CNTL + DMA1_REGISTER_OFFSET, sdma_cntl);
 621                         break;
 622                 default:
 623                         break;
 624                 }
 625                 break;
 626         default:
 627                 break;
 628         }
 629         return 0;
 630 }
 631
 632 static int si_dma_process_trap_irq(struct amdgpu_device *adev,
 633                                       struct amdgpu_irq_src *source,
 634                                       struct amdgpu_iv_entry *entry)
 635 {
 636         if (entry->src_id == 224)
 637                 amdgpu_fence_process(&adev->sdma.instance[0].ring);
 638         else
 639                 amdgpu_fence_process(&adev->sdma.instance[1].ring);
 640         return 0;
 641 }
 642
 643 static int si_dma_set_clockgating_state(void *handle,
 644                                           enum amd_clockgating_state state)
 645 {
 646         u32 orig, data, offset;
 647         int i;
 648         bool enable;
 649         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 650
 651         enable = (state == AMD_CG_STATE_GATE) ? true : false;
 652
 653         if (enable && (adev->cg_flags & AMD_CG_SUPPORT_SDMA_MGCG)) {
 654                 for (i = 0; i < adev->sdma.num_instances; i++) {
 655                         if (i == 0)
 656                                 offset = DMA0_REGISTER_OFFSET;
 657                         else
 658                                 offset = DMA1_REGISTER_OFFSET;
 659                         orig = data = RREG32(DMA_POWER_CNTL + offset);
 660                         data &= ~MEM_POWER_OVERRIDE;
 661                         if (data != orig)
 662                                 WREG32(DMA_POWER_CNTL + offset, data);
 663                         WREG32(DMA_CLK_CTRL + offset, 0x00000100);
 664                 }
 665         } else {
 666                 for (i = 0; i < adev->sdma.num_instances; i++) {
 667                         if (i == 0)
 668                                 offset = DMA0_REGISTER_OFFSET;
 669                         else
 670                                 offset = DMA1_REGISTER_OFFSET;
 671                         orig = data = RREG32(DMA_POWER_CNTL + offset);
 672                         data |= MEM_POWER_OVERRIDE;
 673                         if (data != orig)
 674                                 WREG32(DMA_POWER_CNTL + offset, data);
 675
 676                         orig = data = RREG32(DMA_CLK_CTRL + offset);
 677                         data = 0xff000000;
 678                         if (data != orig)
 679                                 WREG32(DMA_CLK_CTRL + offset, data);
 680                 }
 681         }
 682
 683         return 0;
 684 }
 685
 686 static int si_dma_set_powergating_state(void *handle,
 687                                           enum amd_powergating_state state)
 688 {
 689         u32 tmp;
 690
 691         struct amdgpu_device *adev = (struct amdgpu_device *)handle;
 692
 693         WREG32(DMA_PGFSM_WRITE,  0x00002000);
 694         WREG32(DMA_PGFSM_CONFIG, 0x100010ff);
 695
 696         for (tmp = 0; tmp < 5; tmp++)
 697                 WREG32(DMA_PGFSM_WRITE, 0);
 698
 699         return 0;
 700 }
 701
 702 static const struct amd_ip_funcs si_dma_ip_funcs = {
 703         .name = "si_dma",
 704         .early_init = si_dma_early_init,
 705         .late_init = NULL,
 706         .sw_init = si_dma_sw_init,
 707         .sw_fini = si_dma_sw_fini,
 708         .hw_init = si_dma_hw_init,
 709         .hw_fini = si_dma_hw_fini,
 710         .suspend = si_dma_suspend,
 711         .resume = si_dma_resume,
 712         .is_idle = si_dma_is_idle,
 713         .wait_for_idle = si_dma_wait_for_idle,
 714         .soft_reset = si_dma_soft_reset,
 715         .set_clockgating_state = si_dma_set_clockgating_state,
 716         .set_powergating_state = si_dma_set_powergating_state,
 717 };
 718
 719 static const struct amdgpu_ring_funcs si_dma_ring_funcs = {
 720         .type = AMDGPU_RING_TYPE_SDMA,
 721         .align_mask = 0xf,
 722         .nop = DMA_PACKET(DMA_PACKET_NOP, 0, 0, 0, 0),
 723         .support_64bit_ptrs = false,
 724         .get_rptr = si_dma_ring_get_rptr,
 725         .get_wptr = si_dma_ring_get_wptr,
 726         .set_wptr = si_dma_ring_set_wptr,
 727         .emit_frame_size =
 728                 3 + 3 + /* hdp flush / invalidate */
 729                 6 + /* si_dma_ring_emit_pipeline_sync */
 730                 SI_FLUSH_GPU_TLB_NUM_WREG * 3 + 6 + /* si_dma_ring_emit_vm_flush */
 731                 9 + 9 + 9, /* si_dma_ring_emit_fence x3 for user fence, vm fence */
 732         .emit_ib_size = 7 + 3, /* si_dma_ring_emit_ib */
 733         .emit_ib = si_dma_ring_emit_ib,
 734         .emit_fence = si_dma_ring_emit_fence,
 735         .emit_pipeline_sync = si_dma_ring_emit_pipeline_sync,
 736         .emit_vm_flush = si_dma_ring_emit_vm_flush,
 737         .test_ring = si_dma_ring_test_ring,
 738         .test_ib = si_dma_ring_test_ib,
 739         .insert_nop = amdgpu_ring_insert_nop,
 740         .pad_ib = si_dma_ring_pad_ib,
 741         .emit_wreg = si_dma_ring_emit_wreg,
 742 };
 743
 744 static void si_dma_set_ring_funcs(struct amdgpu_device *adev)
 745 {
 746         int i;
 747
 748         for (i = 0; i < adev->sdma.num_instances; i++)
 749                 adev->sdma.instance[i].ring.funcs = &si_dma_ring_funcs;
 750 }
 751
 752 static const struct amdgpu_irq_src_funcs si_dma_trap_irq_funcs = {
 753         .set = si_dma_set_trap_irq_state,
 754         .process = si_dma_process_trap_irq,
 755 };
 756
 757 static void si_dma_set_irq_funcs(struct amdgpu_device *adev)
 758 {
 759         adev->sdma.trap_irq.num_types = AMDGPU_SDMA_IRQ_LAST;
 760         adev->sdma.trap_irq.funcs = &si_dma_trap_irq_funcs;
 761 }
 762
 763 /**
 764  * si_dma_emit_copy_buffer - copy buffer using the sDMA engine
 765  *
 766  * @ring: amdgpu_ring structure holding ring information
 767  * @src_offset: src GPU address
 768  * @dst_offset: dst GPU address
 769  * @byte_count: number of bytes to xfer
 770  *
 771  * Copy GPU buffers using the DMA engine (VI).
 772  * Used by the amdgpu ttm implementation to move pages if
 773  * registered as the asic copy callback.
 774  */
 775 static void si_dma_emit_copy_buffer(struct amdgpu_ib *ib,
 776                                        uint64_t src_offset,
 777                                        uint64_t dst_offset,
 778                                        uint32_t byte_count)
 779 {
 780         ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_COPY,
 781                                               1, 0, 0, byte_count);
 782         ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
 783         ib->ptr[ib->length_dw++] = lower_32_bits(src_offset);
 784         ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset) & 0xff;
 785         ib->ptr[ib->length_dw++] = upper_32_bits(src_offset) & 0xff;
 786 }
 787
 788 /**
 789  * si_dma_emit_fill_buffer - fill buffer using the sDMA engine
 790  *
 791  * @ring: amdgpu_ring structure holding ring information
 792  * @src_data: value to write to buffer
 793  * @dst_offset: dst GPU address
 794  * @byte_count: number of bytes to xfer
 795  *
 796  * Fill GPU buffers using the DMA engine (VI).
 797  */
 798 static void si_dma_emit_fill_buffer(struct amdgpu_ib *ib,
 799                                        uint32_t src_data,
 800                                        uint64_t dst_offset,
 801                                        uint32_t byte_count)
 802 {
 803         ib->ptr[ib->length_dw++] = DMA_PACKET(DMA_PACKET_CONSTANT_FILL,
 804                                               0, 0, 0, byte_count / 4);
 805         ib->ptr[ib->length_dw++] = lower_32_bits(dst_offset);
 806         ib->ptr[ib->length_dw++] = src_data;
 807         ib->ptr[ib->length_dw++] = upper_32_bits(dst_offset) << 16;
 808 }
 809
 810
 811 static const struct amdgpu_buffer_funcs si_dma_buffer_funcs = {
 812         .copy_max_bytes = 0xffff8,
 813         .copy_num_dw = 5,
 814         .emit_copy_buffer = si_dma_emit_copy_buffer,
 815
 816         .fill_max_bytes = 0xffff8,
 817         .fill_num_dw = 4,
 818         .emit_fill_buffer = si_dma_emit_fill_buffer,
 819 };
 820
 821 static void si_dma_set_buffer_funcs(struct amdgpu_device *adev)
 822 {
 823         adev->mman.buffer_funcs = &si_dma_buffer_funcs;
 824         adev->mman.buffer_funcs_ring = &adev->sdma.instance[0].ring;
 825 }
 826
 827 static const struct amdgpu_vm_pte_funcs si_dma_vm_pte_funcs = {
 828         .copy_pte_num_dw = 5,
 829         .copy_pte = si_dma_vm_copy_pte,
 830
 831         .write_pte = si_dma_vm_write_pte,
 832         .set_pte_pde = si_dma_vm_set_pte_pde,
 833 };
 834
 835 static void si_dma_set_vm_pte_funcs(struct amdgpu_device *adev)
 836 {
 837         struct drm_gpu_scheduler *sched;
 838         unsigned i;
 839
 840         adev->vm_manager.vm_pte_funcs = &si_dma_vm_pte_funcs;
 841         for (i = 0; i < adev->sdma.num_instances; i++) {
 842                 sched = &adev->sdma.instance[i].ring.sched;
 843                 adev->vm_manager.vm_pte_rqs[i] =
 844                         &sched->sched_rq[DRM_SCHED_PRIORITY_KERNEL];
 845         }
 846         adev->vm_manager.vm_pte_num_rqs = adev->sdma.num_instances;
 847 }
 848
 849 const struct amdgpu_ip_block_version si_dma_ip_block =
 850 {
 851         .type = AMD_IP_BLOCK_TYPE_SDMA,
 852         .major = 1,
 853         .minor = 0,
 854         .rev = 0,
 855         .funcs = &si_dma_ip_funcs,
 856 };