drivers/gpu/drm/radeon/cik_sdma.c

   1 /*
   2  * Copyright 2013 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 #include <linux/firmware.h>
  25 #include <drm/drmP.h>
  26 #include "radeon.h"
  27 #include "radeon_asic.h"
  28 #include "cikd.h"
  29
  30 /* sdma */
  31 #define CIK_SDMA_UCODE_SIZE 1050
  32 #define CIK_SDMA_UCODE_VERSION 64
  33
  34 u32 cik_gpu_check_soft_reset(struct radeon_device *rdev);
  35
  36 /*
  37  * sDMA - System DMA
  38  * Starting with CIK, the GPU has new asynchronous
  39  * DMA engines.  These engines are used for compute
  40  * and gfx.  There are two DMA engines (SDMA0, SDMA1)
  41  * and each one supports 1 ring buffer used for gfx
  42  * and 2 queues used for compute.
  43  *
  44  * The programming model is very similar to the CP
  45  * (ring buffer, IBs, etc.), but sDMA has it's own
  46  * packet format that is different from the PM4 format
  47  * used by the CP. sDMA supports copying data, writing
  48  * embedded data, solid fills, and a number of other
  49  * things.  It also has support for tiling/detiling of
  50  * buffers.
  51  */
  52
  53 /**
  54  * cik_sdma_ring_ib_execute - Schedule an IB on the DMA engine
  55  *
  56  * @rdev: radeon_device pointer
  57  * @ib: IB object to schedule
  58  *
  59  * Schedule an IB in the DMA ring (CIK).
  60  */
  61 void cik_sdma_ring_ib_execute(struct radeon_device *rdev,
  62                               struct radeon_ib *ib)
  63 {
  64         struct radeon_ring *ring = &rdev->ring[ib->ring];
  65         u32 extra_bits = (ib->vm ? ib->vm->id : 0) & 0xf;
  66
  67         if (rdev->wb.enabled) {
  68                 u32 next_rptr = ring->wptr + 5;
  69                 while ((next_rptr & 7) != 4)
  70                         next_rptr++;
  71                 next_rptr += 4;
  72                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
  73                 radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
  74                 radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr) & 0xffffffff);
  75                 radeon_ring_write(ring, 1); /* number of DWs to follow */
  76                 radeon_ring_write(ring, next_rptr);
  77         }
  78
  79         /* IB packet must end on a 8 DW boundary */
  80         while ((ring->wptr & 7) != 4)
  81                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0));
  82         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_INDIRECT_BUFFER, 0, extra_bits));
  83         radeon_ring_write(ring, ib->gpu_addr & 0xffffffe0); /* base must be 32 byte aligned */
  84         radeon_ring_write(ring, upper_32_bits(ib->gpu_addr) & 0xffffffff);
  85         radeon_ring_write(ring, ib->length_dw);
  86
  87 }
  88
  89 /**
  90  * cik_sdma_fence_ring_emit - emit a fence on the DMA ring
  91  *
  92  * @rdev: radeon_device pointer
  93  * @fence: radeon fence object
  94  *
  95  * Add a DMA fence packet to the ring to write
  96  * the fence seq number and DMA trap packet to generate
  97  * an interrupt if needed (CIK).
  98  */
  99 void cik_sdma_fence_ring_emit(struct radeon_device *rdev,
 100                               struct radeon_fence *fence)
 101 {
 102         struct radeon_ring *ring = &rdev->ring[fence->ring];
 103         u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
 104         u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(1) |
 105                           SDMA_POLL_REG_MEM_EXTRA_FUNC(3)); /* == */
 106         u32 ref_and_mask;
 107
 108         if (fence->ring == R600_RING_TYPE_DMA_INDEX)
 109                 ref_and_mask = SDMA0;
 110         else
 111                 ref_and_mask = SDMA1;
 112
 113         /* write the fence */
 114         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_FENCE, 0, 0));
 115         radeon_ring_write(ring, addr & 0xffffffff);
 116         radeon_ring_write(ring, upper_32_bits(addr) & 0xffffffff);
 117         radeon_ring_write(ring, fence->seq);
 118         /* generate an interrupt */
 119         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_TRAP, 0, 0));
 120         /* flush HDP */
 121         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_POLL_REG_MEM, 0, extra_bits));
 122         radeon_ring_write(ring, GPU_HDP_FLUSH_DONE);
 123         radeon_ring_write(ring, GPU_HDP_FLUSH_REQ);
 124         radeon_ring_write(ring, ref_and_mask); /* REFERENCE */
 125         radeon_ring_write(ring, ref_and_mask); /* MASK */
 126         radeon_ring_write(ring, (4 << 16) | 10); /* RETRY_COUNT, POLL_INTERVAL */
 127 }
 128
 129 /**
 130  * cik_sdma_semaphore_ring_emit - emit a semaphore on the dma ring
 131  *
 132  * @rdev: radeon_device pointer
 133  * @ring: radeon_ring structure holding ring information
 134  * @semaphore: radeon semaphore object
 135  * @emit_wait: wait or signal semaphore
 136  *
 137  * Add a DMA semaphore packet to the ring wait on or signal
 138  * other rings (CIK).
 139  */
 140 void cik_sdma_semaphore_ring_emit(struct radeon_device *rdev,
 141                                   struct radeon_ring *ring,
 142                                   struct radeon_semaphore *semaphore,
 143                                   bool emit_wait)
 144 {
 145         u64 addr = semaphore->gpu_addr;
 146         u32 extra_bits = emit_wait ? 0 : SDMA_SEMAPHORE_EXTRA_S;
 147
 148         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SEMAPHORE, 0, extra_bits));
 149         radeon_ring_write(ring, addr & 0xfffffff8);
 150         radeon_ring_write(ring, upper_32_bits(addr) & 0xffffffff);
 151 }
 152
 153 /**
 154  * cik_sdma_gfx_stop - stop the gfx async dma engines
 155  *
 156  * @rdev: radeon_device pointer
 157  *
 158  * Stop the gfx async dma ring buffers (CIK).
 159  */
 160 static void cik_sdma_gfx_stop(struct radeon_device *rdev)
 161 {
 162         u32 rb_cntl, reg_offset;
 163         int i;
 164
 165         radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
 166
 167         for (i = 0; i < 2; i++) {
 168                 if (i == 0)
 169                         reg_offset = SDMA0_REGISTER_OFFSET;
 170                 else
 171                         reg_offset = SDMA1_REGISTER_OFFSET;
 172                 rb_cntl = RREG32(SDMA0_GFX_RB_CNTL + reg_offset);
 173                 rb_cntl &= ~SDMA_RB_ENABLE;
 174                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
 175                 WREG32(SDMA0_GFX_IB_CNTL + reg_offset, 0);
 176         }
 177 }
 178
 179 /**
 180  * cik_sdma_rlc_stop - stop the compute async dma engines
 181  *
 182  * @rdev: radeon_device pointer
 183  *
 184  * Stop the compute async dma queues (CIK).
 185  */
 186 static void cik_sdma_rlc_stop(struct radeon_device *rdev)
 187 {
 188         /* XXX todo */
 189 }
 190
 191 /**
 192  * cik_sdma_enable - stop the async dma engines
 193  *
 194  * @rdev: radeon_device pointer
 195  * @enable: enable/disable the DMA MEs.
 196  *
 197  * Halt or unhalt the async dma engines (CIK).
 198  */
 199 void cik_sdma_enable(struct radeon_device *rdev, bool enable)
 200 {
 201         u32 me_cntl, reg_offset;
 202         int i;
 203
 204         for (i = 0; i < 2; i++) {
 205                 if (i == 0)
 206                         reg_offset = SDMA0_REGISTER_OFFSET;
 207                 else
 208                         reg_offset = SDMA1_REGISTER_OFFSET;
 209                 me_cntl = RREG32(SDMA0_ME_CNTL + reg_offset);
 210                 if (enable)
 211                         me_cntl &= ~SDMA_HALT;
 212                 else
 213                         me_cntl |= SDMA_HALT;
 214                 WREG32(SDMA0_ME_CNTL + reg_offset, me_cntl);
 215         }
 216 }
 217
 218 /**
 219  * cik_sdma_gfx_resume - setup and start the async dma engines
 220  *
 221  * @rdev: radeon_device pointer
 222  *
 223  * Set up the gfx DMA ring buffers and enable them (CIK).
 224  * Returns 0 for success, error for failure.
 225  */
 226 static int cik_sdma_gfx_resume(struct radeon_device *rdev)
 227 {
 228         struct radeon_ring *ring;
 229         u32 rb_cntl, ib_cntl;
 230         u32 rb_bufsz;
 231         u32 reg_offset, wb_offset;
 232         int i, r;
 233
 234         for (i = 0; i < 2; i++) {
 235                 if (i == 0) {
 236                         ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
 237                         reg_offset = SDMA0_REGISTER_OFFSET;
 238                         wb_offset = R600_WB_DMA_RPTR_OFFSET;
 239                 } else {
 240                         ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
 241                         reg_offset = SDMA1_REGISTER_OFFSET;
 242                         wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
 243                 }
 244
 245                 WREG32(SDMA0_SEM_INCOMPLETE_TIMER_CNTL + reg_offset, 0);
 246                 WREG32(SDMA0_SEM_WAIT_FAIL_TIMER_CNTL + reg_offset, 0);
 247
 248                 /* Set ring buffer size in dwords */
 249                 rb_bufsz = drm_order(ring->ring_size / 4);
 250                 rb_cntl = rb_bufsz << 1;
 251 #ifdef __BIG_ENDIAN
 252                 rb_cntl |= SDMA_RB_SWAP_ENABLE | SDMA_RPTR_WRITEBACK_SWAP_ENABLE;
 253 #endif
 254                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
 255
 256                 /* Initialize the ring buffer's read and write pointers */
 257                 WREG32(SDMA0_GFX_RB_RPTR + reg_offset, 0);
 258                 WREG32(SDMA0_GFX_RB_WPTR + reg_offset, 0);
 259
 260                 /* set the wb address whether it's enabled or not */
 261                 WREG32(SDMA0_GFX_RB_RPTR_ADDR_HI + reg_offset,
 262                        upper_32_bits(rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFF);
 263                 WREG32(SDMA0_GFX_RB_RPTR_ADDR_LO + reg_offset,
 264                        ((rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC));
 265
 266                 if (rdev->wb.enabled)
 267                         rb_cntl |= SDMA_RPTR_WRITEBACK_ENABLE;
 268
 269                 WREG32(SDMA0_GFX_RB_BASE + reg_offset, ring->gpu_addr >> 8);
 270                 WREG32(SDMA0_GFX_RB_BASE_HI + reg_offset, ring->gpu_addr >> 40);
 271
 272                 ring->wptr = 0;
 273                 WREG32(SDMA0_GFX_RB_WPTR + reg_offset, ring->wptr << 2);
 274
 275                 ring->rptr = RREG32(SDMA0_GFX_RB_RPTR + reg_offset) >> 2;
 276
 277                 /* enable DMA RB */
 278                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl | SDMA_RB_ENABLE);
 279
 280                 ib_cntl = SDMA_IB_ENABLE;
 281 #ifdef __BIG_ENDIAN
 282                 ib_cntl |= SDMA_IB_SWAP_ENABLE;
 283 #endif
 284                 /* enable DMA IBs */
 285                 WREG32(SDMA0_GFX_IB_CNTL + reg_offset, ib_cntl);
 286
 287                 ring->ready = true;
 288
 289                 r = radeon_ring_test(rdev, ring->idx, ring);
 290                 if (r) {
 291                         ring->ready = false;
 292                         return r;
 293                 }
 294         }
 295
 296         radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
 297
 298         return 0;
 299 }
 300
 301 /**
 302  * cik_sdma_rlc_resume - setup and start the async dma engines
 303  *
 304  * @rdev: radeon_device pointer
 305  *
 306  * Set up the compute DMA queues and enable them (CIK).
 307  * Returns 0 for success, error for failure.
 308  */
 309 static int cik_sdma_rlc_resume(struct radeon_device *rdev)
 310 {
 311         /* XXX todo */
 312         return 0;
 313 }
 314
 315 /**
 316  * cik_sdma_load_microcode - load the sDMA ME ucode
 317  *
 318  * @rdev: radeon_device pointer
 319  *
 320  * Loads the sDMA0/1 ucode.
 321  * Returns 0 for success, -EINVAL if the ucode is not available.
 322  */
 323 static int cik_sdma_load_microcode(struct radeon_device *rdev)
 324 {
 325         const __be32 *fw_data;
 326         int i;
 327
 328         if (!rdev->sdma_fw)
 329                 return -EINVAL;
 330
 331         /* stop the gfx rings and rlc compute queues */
 332         cik_sdma_gfx_stop(rdev);
 333         cik_sdma_rlc_stop(rdev);
 334
 335         /* halt the MEs */
 336         cik_sdma_enable(rdev, false);
 337
 338         /* sdma0 */
 339         fw_data = (const __be32 *)rdev->sdma_fw->data;
 340         WREG32(SDMA0_UCODE_ADDR + SDMA0_REGISTER_OFFSET, 0);
 341         for (i = 0; i < CIK_SDMA_UCODE_SIZE; i++)
 342                 WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, be32_to_cpup(fw_data++));
 343         WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 344
 345         /* sdma1 */
 346         fw_data = (const __be32 *)rdev->sdma_fw->data;
 347         WREG32(SDMA0_UCODE_ADDR + SDMA1_REGISTER_OFFSET, 0);
 348         for (i = 0; i < CIK_SDMA_UCODE_SIZE; i++)
 349                 WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, be32_to_cpup(fw_data++));
 350         WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 351
 352         WREG32(SDMA0_UCODE_ADDR + SDMA0_REGISTER_OFFSET, 0);
 353         WREG32(SDMA0_UCODE_ADDR + SDMA1_REGISTER_OFFSET, 0);
 354         return 0;
 355 }
 356
 357 /**
 358  * cik_sdma_resume - setup and start the async dma engines
 359  *
 360  * @rdev: radeon_device pointer
 361  *
 362  * Set up the DMA engines and enable them (CIK).
 363  * Returns 0 for success, error for failure.
 364  */
 365 int cik_sdma_resume(struct radeon_device *rdev)
 366 {
 367         int r;
 368
 369         /* Reset dma */
 370         WREG32(SRBM_SOFT_RESET, SOFT_RESET_SDMA | SOFT_RESET_SDMA1);
 371         RREG32(SRBM_SOFT_RESET);
 372         udelay(50);
 373         WREG32(SRBM_SOFT_RESET, 0);
 374         RREG32(SRBM_SOFT_RESET);
 375
 376         r = cik_sdma_load_microcode(rdev);
 377         if (r)
 378                 return r;
 379
 380         /* unhalt the MEs */
 381         cik_sdma_enable(rdev, true);
 382
 383         /* start the gfx rings and rlc compute queues */
 384         r = cik_sdma_gfx_resume(rdev);
 385         if (r)
 386                 return r;
 387         r = cik_sdma_rlc_resume(rdev);
 388         if (r)
 389                 return r;
 390
 391         return 0;
 392 }
 393
 394 /**
 395  * cik_sdma_fini - tear down the async dma engines
 396  *
 397  * @rdev: radeon_device pointer
 398  *
 399  * Stop the async dma engines and free the rings (CIK).
 400  */
 401 void cik_sdma_fini(struct radeon_device *rdev)
 402 {
 403         /* stop the gfx rings and rlc compute queues */
 404         cik_sdma_gfx_stop(rdev);
 405         cik_sdma_rlc_stop(rdev);
 406         /* halt the MEs */
 407         cik_sdma_enable(rdev, false);
 408         radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
 409         radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]);
 410         /* XXX - compute dma queue tear down */
 411 }
 412
 413 /**
 414  * cik_copy_dma - copy pages using the DMA engine
 415  *
 416  * @rdev: radeon_device pointer
 417  * @src_offset: src GPU address
 418  * @dst_offset: dst GPU address
 419  * @num_gpu_pages: number of GPU pages to xfer
 420  * @fence: radeon fence object
 421  *
 422  * Copy GPU paging using the DMA engine (CIK).
 423  * Used by the radeon ttm implementation to move pages if
 424  * registered as the asic copy callback.
 425  */
 426 int cik_copy_dma(struct radeon_device *rdev,
 427                  uint64_t src_offset, uint64_t dst_offset,
 428                  unsigned num_gpu_pages,
 429                  struct radeon_fence **fence)
 430 {
 431         struct radeon_semaphore *sem = NULL;
 432         int ring_index = rdev->asic->copy.dma_ring_index;
 433         struct radeon_ring *ring = &rdev->ring[ring_index];
 434         u32 size_in_bytes, cur_size_in_bytes;
 435         int i, num_loops;
 436         int r = 0;
 437
 438         r = radeon_semaphore_create(rdev, &sem);
 439         if (r) {
 440                 DRM_ERROR("radeon: moving bo (%d).\n", r);
 441                 return r;
 442         }
 443
 444         size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
 445         num_loops = DIV_ROUND_UP(size_in_bytes, 0x1fffff);
 446         r = radeon_ring_lock(rdev, ring, num_loops * 7 + 14);
 447         if (r) {
 448                 DRM_ERROR("radeon: moving bo (%d).\n", r);
 449                 radeon_semaphore_free(rdev, &sem, NULL);
 450                 return r;
 451         }
 452
 453         if (radeon_fence_need_sync(*fence, ring->idx)) {
 454                 radeon_semaphore_sync_rings(rdev, sem, (*fence)->ring,
 455                                             ring->idx);
 456                 radeon_fence_note_sync(*fence, ring->idx);
 457         } else {
 458                 radeon_semaphore_free(rdev, &sem, NULL);
 459         }
 460
 461         for (i = 0; i < num_loops; i++) {
 462                 cur_size_in_bytes = size_in_bytes;
 463                 if (cur_size_in_bytes > 0x1fffff)
 464                         cur_size_in_bytes = 0x1fffff;
 465                 size_in_bytes -= cur_size_in_bytes;
 466                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_COPY, SDMA_COPY_SUB_OPCODE_LINEAR, 0));
 467                 radeon_ring_write(ring, cur_size_in_bytes);
 468                 radeon_ring_write(ring, 0); /* src/dst endian swap */
 469                 radeon_ring_write(ring, src_offset & 0xffffffff);
 470                 radeon_ring_write(ring, upper_32_bits(src_offset) & 0xffffffff);
 471                 radeon_ring_write(ring, dst_offset & 0xfffffffc);
 472                 radeon_ring_write(ring, upper_32_bits(dst_offset) & 0xffffffff);
 473                 src_offset += cur_size_in_bytes;
 474                 dst_offset += cur_size_in_bytes;
 475         }
 476
 477         r = radeon_fence_emit(rdev, fence, ring->idx);
 478         if (r) {
 479                 radeon_ring_unlock_undo(rdev, ring);
 480                 return r;
 481         }
 482
 483         radeon_ring_unlock_commit(rdev, ring);
 484         radeon_semaphore_free(rdev, &sem, *fence);
 485
 486         return r;
 487 }
 488
 489 /**
 490  * cik_sdma_ring_test - simple async dma engine test
 491  *
 492  * @rdev: radeon_device pointer
 493  * @ring: radeon_ring structure holding ring information
 494  *
 495  * Test the DMA engine by writing using it to write an
 496  * value to memory. (CIK).
 497  * Returns 0 for success, error for failure.
 498  */
 499 int cik_sdma_ring_test(struct radeon_device *rdev,
 500                        struct radeon_ring *ring)
 501 {
 502         unsigned i;
 503         int r;
 504         void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
 505         u32 tmp;
 506
 507         if (!ptr) {
 508                 DRM_ERROR("invalid vram scratch pointer\n");
 509                 return -EINVAL;
 510         }
 511
 512         tmp = 0xCAFEDEAD;
 513         writel(tmp, ptr);
 514
 515         r = radeon_ring_lock(rdev, ring, 4);
 516         if (r) {
 517                 DRM_ERROR("radeon: dma failed to lock ring %d (%d).\n", ring->idx, r);
 518                 return r;
 519         }
 520         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
 521         radeon_ring_write(ring, rdev->vram_scratch.gpu_addr & 0xfffffffc);
 522         radeon_ring_write(ring, upper_32_bits(rdev->vram_scratch.gpu_addr) & 0xffffffff);
 523         radeon_ring_write(ring, 1); /* number of DWs to follow */
 524         radeon_ring_write(ring, 0xDEADBEEF);
 525         radeon_ring_unlock_commit(rdev, ring);
 526
 527         for (i = 0; i < rdev->usec_timeout; i++) {
 528                 tmp = readl(ptr);
 529                 if (tmp == 0xDEADBEEF)
 530                         break;
 531                 DRM_UDELAY(1);
 532         }
 533
 534         if (i < rdev->usec_timeout) {
 535                 DRM_INFO("ring test on %d succeeded in %d usecs\n", ring->idx, i);
 536         } else {
 537                 DRM_ERROR("radeon: ring %d test failed (0x%08X)\n",
 538                           ring->idx, tmp);
 539                 r = -EINVAL;
 540         }
 541         return r;
 542 }
 543
 544 /**
 545  * cik_sdma_ib_test - test an IB on the DMA engine
 546  *
 547  * @rdev: radeon_device pointer
 548  * @ring: radeon_ring structure holding ring information
 549  *
 550  * Test a simple IB in the DMA ring (CIK).
 551  * Returns 0 on success, error on failure.
 552  */
 553 int cik_sdma_ib_test(struct radeon_device *rdev, struct radeon_ring *ring)
 554 {
 555         struct radeon_ib ib;
 556         unsigned i;
 557         int r;
 558         void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
 559         u32 tmp = 0;
 560
 561         if (!ptr) {
 562                 DRM_ERROR("invalid vram scratch pointer\n");
 563                 return -EINVAL;
 564         }
 565
 566         tmp = 0xCAFEDEAD;
 567         writel(tmp, ptr);
 568
 569         r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256);
 570         if (r) {
 571                 DRM_ERROR("radeon: failed to get ib (%d).\n", r);
 572                 return r;
 573         }
 574
 575         ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 576         ib.ptr[1] = rdev->vram_scratch.gpu_addr & 0xfffffffc;
 577         ib.ptr[2] = upper_32_bits(rdev->vram_scratch.gpu_addr) & 0xffffffff;
 578         ib.ptr[3] = 1;
 579         ib.ptr[4] = 0xDEADBEEF;
 580         ib.length_dw = 5;
 581
 582         r = radeon_ib_schedule(rdev, &ib, NULL);
 583         if (r) {
 584                 radeon_ib_free(rdev, &ib);
 585                 DRM_ERROR("radeon: failed to schedule ib (%d).\n", r);
 586                 return r;
 587         }
 588         r = radeon_fence_wait(ib.fence, false);
 589         if (r) {
 590                 DRM_ERROR("radeon: fence wait failed (%d).\n", r);
 591                 return r;
 592         }
 593         for (i = 0; i < rdev->usec_timeout; i++) {
 594                 tmp = readl(ptr);
 595                 if (tmp == 0xDEADBEEF)
 596                         break;
 597                 DRM_UDELAY(1);
 598         }
 599         if (i < rdev->usec_timeout) {
 600                 DRM_INFO("ib test on ring %d succeeded in %u usecs\n", ib.fence->ring, i);
 601         } else {
 602                 DRM_ERROR("radeon: ib test failed (0x%08X)\n", tmp);
 603                 r = -EINVAL;
 604         }
 605         radeon_ib_free(rdev, &ib);
 606         return r;
 607 }
 608
 609 /**
 610  * cik_sdma_is_lockup - Check if the DMA engine is locked up
 611  *
 612  * @rdev: radeon_device pointer
 613  * @ring: radeon_ring structure holding ring information
 614  *
 615  * Check if the async DMA engine is locked up (CIK).
 616  * Returns true if the engine appears to be locked up, false if not.
 617  */
 618 bool cik_sdma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 619 {
 620         u32 reset_mask = cik_gpu_check_soft_reset(rdev);
 621         u32 mask;
 622
 623         if (ring->idx == R600_RING_TYPE_DMA_INDEX)
 624                 mask = RADEON_RESET_DMA;
 625         else
 626                 mask = RADEON_RESET_DMA1;
 627
 628         if (!(reset_mask & mask)) {
 629                 radeon_ring_lockup_update(ring);
 630                 return false;
 631         }
 632         /* force ring activities */
 633         radeon_ring_force_activity(rdev, ring);
 634         return radeon_ring_test_lockup(rdev, ring);
 635 }
 636
 637 /**
 638  * cik_sdma_vm_set_page - update the page tables using sDMA
 639  *
 640  * @rdev: radeon_device pointer
 641  * @ib: indirect buffer to fill with commands
 642  * @pe: addr of the page entry
 643  * @addr: dst addr to write into pe
 644  * @count: number of page entries to update
 645  * @incr: increase next addr by incr bytes
 646  * @flags: access flags
 647  *
 648  * Update the page tables using sDMA (CIK).
 649  */
 650 void cik_sdma_vm_set_page(struct radeon_device *rdev,
 651                           struct radeon_ib *ib,
 652                           uint64_t pe,
 653                           uint64_t addr, unsigned count,
 654                           uint32_t incr, uint32_t flags)
 655 {
 656         uint32_t r600_flags = cayman_vm_page_flags(rdev, flags);
 657         uint64_t value;
 658         unsigned ndw;
 659
 660         if (flags & RADEON_VM_PAGE_SYSTEM) {
 661                 while (count) {
 662                         ndw = count * 2;
 663                         if (ndw > 0xFFFFE)
 664                                 ndw = 0xFFFFE;
 665
 666                         /* for non-physically contiguous pages (system) */
 667                         ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 668                         ib->ptr[ib->length_dw++] = pe;
 669                         ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 670                         ib->ptr[ib->length_dw++] = ndw;
 671                         for (; ndw > 0; ndw -= 2, --count, pe += 8) {
 672                                 if (flags & RADEON_VM_PAGE_SYSTEM) {
 673                                         value = radeon_vm_map_gart(rdev, addr);
 674                                         value &= 0xFFFFFFFFFFFFF000ULL;
 675                                 } else if (flags & RADEON_VM_PAGE_VALID) {
 676                                         value = addr;
 677                                 } else {
 678                                         value = 0;
 679                                 }
 680                                 addr += incr;
 681                                 value |= r600_flags;
 682                                 ib->ptr[ib->length_dw++] = value;
 683                                 ib->ptr[ib->length_dw++] = upper_32_bits(value);
 684                         }
 685                 }
 686         } else {
 687                 while (count) {
 688                         ndw = count;
 689                         if (ndw > 0x7FFFF)
 690                                 ndw = 0x7FFFF;
 691
 692                         if (flags & RADEON_VM_PAGE_VALID)
 693                                 value = addr;
 694                         else
 695                                 value = 0;
 696                         /* for physically contiguous pages (vram) */
 697                         ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_GENERATE_PTE_PDE, 0, 0);
 698                         ib->ptr[ib->length_dw++] = pe; /* dst addr */
 699                         ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 700                         ib->ptr[ib->length_dw++] = r600_flags; /* mask */
 701                         ib->ptr[ib->length_dw++] = 0;
 702                         ib->ptr[ib->length_dw++] = value; /* value */
 703                         ib->ptr[ib->length_dw++] = upper_32_bits(value);
 704                         ib->ptr[ib->length_dw++] = incr; /* increment size */
 705                         ib->ptr[ib->length_dw++] = 0;
 706                         ib->ptr[ib->length_dw++] = ndw; /* number of entries */
 707                         pe += ndw * 8;
 708                         addr += ndw * incr;
 709                         count -= ndw;
 710                 }
 711         }
 712         while (ib->length_dw & 0x7)
 713                 ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0);
 714 }
 715
 716 /**
 717  * cik_dma_vm_flush - cik vm flush using sDMA
 718  *
 719  * @rdev: radeon_device pointer
 720  *
 721  * Update the page table base and flush the VM TLB
 722  * using sDMA (CIK).
 723  */
 724 void cik_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
 725 {
 726         struct radeon_ring *ring = &rdev->ring[ridx];
 727         u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(1) |
 728                           SDMA_POLL_REG_MEM_EXTRA_FUNC(3)); /* == */
 729         u32 ref_and_mask;
 730
 731         if (vm == NULL)
 732                 return;
 733
 734         if (ridx == R600_RING_TYPE_DMA_INDEX)
 735                 ref_and_mask = SDMA0;
 736         else
 737                 ref_and_mask = SDMA1;
 738
 739         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 740         if (vm->id < 8) {
 741                 radeon_ring_write(ring, (VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2);
 742         } else {
 743                 radeon_ring_write(ring, (VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm->id - 8) << 2)) >> 2);
 744         }
 745         radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
 746
 747         /* update SH_MEM_* regs */
 748         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 749         radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
 750         radeon_ring_write(ring, VMID(vm->id));
 751
 752         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 753         radeon_ring_write(ring, SH_MEM_BASES >> 2);
 754         radeon_ring_write(ring, 0);
 755
 756         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 757         radeon_ring_write(ring, SH_MEM_CONFIG >> 2);
 758         radeon_ring_write(ring, 0);
 759
 760         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 761         radeon_ring_write(ring, SH_MEM_APE1_BASE >> 2);
 762         radeon_ring_write(ring, 1);
 763
 764         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 765         radeon_ring_write(ring, SH_MEM_APE1_LIMIT >> 2);
 766         radeon_ring_write(ring, 0);
 767
 768         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 769         radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
 770         radeon_ring_write(ring, VMID(0));
 771
 772         /* flush HDP */
 773         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_POLL_REG_MEM, 0, extra_bits));
 774         radeon_ring_write(ring, GPU_HDP_FLUSH_DONE);
 775         radeon_ring_write(ring, GPU_HDP_FLUSH_REQ);
 776         radeon_ring_write(ring, ref_and_mask); /* REFERENCE */
 777         radeon_ring_write(ring, ref_and_mask); /* MASK */
 778         radeon_ring_write(ring, (4 << 16) | 10); /* RETRY_COUNT, POLL_INTERVAL */
 779
 780         /* flush TLB */
 781         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 782         radeon_ring_write(ring, VM_INVALIDATE_REQUEST >> 2);
 783         radeon_ring_write(ring, 1 << vm->id);
 784 }
 785