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_ucode.h"
  28 #include "radeon_asic.h"
  29 #include "radeon_trace.h"
  30 #include "cikd.h"
  31
  32 /* sdma */
  33 #define CIK_SDMA_UCODE_SIZE 1050
  34 #define CIK_SDMA_UCODE_VERSION 64
  35
  36 u32 cik_gpu_check_soft_reset(struct radeon_device *rdev);
  37
  38 /*
  39  * sDMA - System DMA
  40  * Starting with CIK, the GPU has new asynchronous
  41  * DMA engines.  These engines are used for compute
  42  * and gfx.  There are two DMA engines (SDMA0, SDMA1)
  43  * and each one supports 1 ring buffer used for gfx
  44  * and 2 queues used for compute.
  45  *
  46  * The programming model is very similar to the CP
  47  * (ring buffer, IBs, etc.), but sDMA has it's own
  48  * packet format that is different from the PM4 format
  49  * used by the CP. sDMA supports copying data, writing
  50  * embedded data, solid fills, and a number of other
  51  * things.  It also has support for tiling/detiling of
  52  * buffers.
  53  */
  54
  55 /**
  56  * cik_sdma_get_rptr - get the current read pointer
  57  *
  58  * @rdev: radeon_device pointer
  59  * @ring: radeon ring pointer
  60  *
  61  * Get the current rptr from the hardware (CIK+).
  62  */
  63 uint32_t cik_sdma_get_rptr(struct radeon_device *rdev,
  64                            struct radeon_ring *ring)
  65 {
  66         u32 rptr, reg;
  67
  68         if (rdev->wb.enabled) {
  69                 rptr = rdev->wb.wb[ring->rptr_offs/4];
  70         } else {
  71                 if (ring->idx == R600_RING_TYPE_DMA_INDEX)
  72                         reg = SDMA0_GFX_RB_RPTR + SDMA0_REGISTER_OFFSET;
  73                 else
  74                         reg = SDMA0_GFX_RB_RPTR + SDMA1_REGISTER_OFFSET;
  75
  76                 rptr = RREG32(reg);
  77         }
  78
  79         return (rptr & 0x3fffc) >> 2;
  80 }
  81
  82 /**
  83  * cik_sdma_get_wptr - get the current write pointer
  84  *
  85  * @rdev: radeon_device pointer
  86  * @ring: radeon ring pointer
  87  *
  88  * Get the current wptr from the hardware (CIK+).
  89  */
  90 uint32_t cik_sdma_get_wptr(struct radeon_device *rdev,
  91                            struct radeon_ring *ring)
  92 {
  93         u32 reg;
  94
  95         if (ring->idx == R600_RING_TYPE_DMA_INDEX)
  96                 reg = SDMA0_GFX_RB_WPTR + SDMA0_REGISTER_OFFSET;
  97         else
  98                 reg = SDMA0_GFX_RB_WPTR + SDMA1_REGISTER_OFFSET;
  99
 100         return (RREG32(reg) & 0x3fffc) >> 2;
 101 }
 102
 103 /**
 104  * cik_sdma_set_wptr - commit the write pointer
 105  *
 106  * @rdev: radeon_device pointer
 107  * @ring: radeon ring pointer
 108  *
 109  * Write the wptr back to the hardware (CIK+).
 110  */
 111 void cik_sdma_set_wptr(struct radeon_device *rdev,
 112                        struct radeon_ring *ring)
 113 {
 114         u32 reg;
 115
 116         if (ring->idx == R600_RING_TYPE_DMA_INDEX)
 117                 reg = SDMA0_GFX_RB_WPTR + SDMA0_REGISTER_OFFSET;
 118         else
 119                 reg = SDMA0_GFX_RB_WPTR + SDMA1_REGISTER_OFFSET;
 120
 121         WREG32(reg, (ring->wptr << 2) & 0x3fffc);
 122         (void)RREG32(reg);
 123 }
 124
 125 /**
 126  * cik_sdma_ring_ib_execute - Schedule an IB on the DMA engine
 127  *
 128  * @rdev: radeon_device pointer
 129  * @ib: IB object to schedule
 130  *
 131  * Schedule an IB in the DMA ring (CIK).
 132  */
 133 void cik_sdma_ring_ib_execute(struct radeon_device *rdev,
 134                               struct radeon_ib *ib)
 135 {
 136         struct radeon_ring *ring = &rdev->ring[ib->ring];
 137         u32 extra_bits = (ib->vm ? ib->vm->id : 0) & 0xf;
 138
 139         if (rdev->wb.enabled) {
 140                 u32 next_rptr = ring->wptr + 5;
 141                 while ((next_rptr & 7) != 4)
 142                         next_rptr++;
 143                 next_rptr += 4;
 144                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
 145                 radeon_ring_write(ring, ring->next_rptr_gpu_addr & 0xfffffffc);
 146                 radeon_ring_write(ring, upper_32_bits(ring->next_rptr_gpu_addr));
 147                 radeon_ring_write(ring, 1); /* number of DWs to follow */
 148                 radeon_ring_write(ring, next_rptr);
 149         }
 150
 151         /* IB packet must end on a 8 DW boundary */
 152         while ((ring->wptr & 7) != 4)
 153                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0));
 154         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_INDIRECT_BUFFER, 0, extra_bits));
 155         radeon_ring_write(ring, ib->gpu_addr & 0xffffffe0); /* base must be 32 byte aligned */
 156         radeon_ring_write(ring, upper_32_bits(ib->gpu_addr));
 157         radeon_ring_write(ring, ib->length_dw);
 158
 159 }
 160
 161 /**
 162  * cik_sdma_hdp_flush_ring_emit - emit an hdp flush on the DMA ring
 163  *
 164  * @rdev: radeon_device pointer
 165  * @ridx: radeon ring index
 166  *
 167  * Emit an hdp flush packet on the requested DMA ring.
 168  */
 169 static void cik_sdma_hdp_flush_ring_emit(struct radeon_device *rdev,
 170                                          int ridx)
 171 {
 172         struct radeon_ring *ring = &rdev->ring[ridx];
 173         u32 extra_bits = (SDMA_POLL_REG_MEM_EXTRA_OP(1) |
 174                           SDMA_POLL_REG_MEM_EXTRA_FUNC(3)); /* == */
 175         u32 ref_and_mask;
 176
 177         if (ridx == R600_RING_TYPE_DMA_INDEX)
 178                 ref_and_mask = SDMA0;
 179         else
 180                 ref_and_mask = SDMA1;
 181
 182         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_POLL_REG_MEM, 0, extra_bits));
 183         radeon_ring_write(ring, GPU_HDP_FLUSH_DONE);
 184         radeon_ring_write(ring, GPU_HDP_FLUSH_REQ);
 185         radeon_ring_write(ring, ref_and_mask); /* reference */
 186         radeon_ring_write(ring, ref_and_mask); /* mask */
 187         radeon_ring_write(ring, (0xfff << 16) | 10); /* retry count, poll interval */
 188 }
 189
 190 /**
 191  * cik_sdma_fence_ring_emit - emit a fence on the DMA ring
 192  *
 193  * @rdev: radeon_device pointer
 194  * @fence: radeon fence object
 195  *
 196  * Add a DMA fence packet to the ring to write
 197  * the fence seq number and DMA trap packet to generate
 198  * an interrupt if needed (CIK).
 199  */
 200 void cik_sdma_fence_ring_emit(struct radeon_device *rdev,
 201                               struct radeon_fence *fence)
 202 {
 203         struct radeon_ring *ring = &rdev->ring[fence->ring];
 204         u64 addr = rdev->fence_drv[fence->ring].gpu_addr;
 205
 206         /* write the fence */
 207         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_FENCE, 0, 0));
 208         radeon_ring_write(ring, lower_32_bits(addr));
 209         radeon_ring_write(ring, upper_32_bits(addr));
 210         radeon_ring_write(ring, fence->seq);
 211         /* generate an interrupt */
 212         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_TRAP, 0, 0));
 213         /* flush HDP */
 214         cik_sdma_hdp_flush_ring_emit(rdev, fence->ring);
 215 }
 216
 217 /**
 218  * cik_sdma_semaphore_ring_emit - emit a semaphore on the dma ring
 219  *
 220  * @rdev: radeon_device pointer
 221  * @ring: radeon_ring structure holding ring information
 222  * @semaphore: radeon semaphore object
 223  * @emit_wait: wait or signal semaphore
 224  *
 225  * Add a DMA semaphore packet to the ring wait on or signal
 226  * other rings (CIK).
 227  */
 228 bool cik_sdma_semaphore_ring_emit(struct radeon_device *rdev,
 229                                   struct radeon_ring *ring,
 230                                   struct radeon_semaphore *semaphore,
 231                                   bool emit_wait)
 232 {
 233         u64 addr = semaphore->gpu_addr;
 234         u32 extra_bits = emit_wait ? 0 : SDMA_SEMAPHORE_EXTRA_S;
 235
 236         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SEMAPHORE, 0, extra_bits));
 237         radeon_ring_write(ring, addr & 0xfffffff8);
 238         radeon_ring_write(ring, upper_32_bits(addr));
 239
 240         return true;
 241 }
 242
 243 /**
 244  * cik_sdma_gfx_stop - stop the gfx async dma engines
 245  *
 246  * @rdev: radeon_device pointer
 247  *
 248  * Stop the gfx async dma ring buffers (CIK).
 249  */
 250 static void cik_sdma_gfx_stop(struct radeon_device *rdev)
 251 {
 252         u32 rb_cntl, reg_offset;
 253         int i;
 254
 255         if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
 256             (rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
 257                 radeon_ttm_set_active_vram_size(rdev, rdev->mc.visible_vram_size);
 258
 259         for (i = 0; i < 2; i++) {
 260                 if (i == 0)
 261                         reg_offset = SDMA0_REGISTER_OFFSET;
 262                 else
 263                         reg_offset = SDMA1_REGISTER_OFFSET;
 264                 rb_cntl = RREG32(SDMA0_GFX_RB_CNTL + reg_offset);
 265                 rb_cntl &= ~SDMA_RB_ENABLE;
 266                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
 267                 WREG32(SDMA0_GFX_IB_CNTL + reg_offset, 0);
 268         }
 269         rdev->ring[R600_RING_TYPE_DMA_INDEX].ready = false;
 270         rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX].ready = false;
 271 }
 272
 273 /**
 274  * cik_sdma_rlc_stop - stop the compute async dma engines
 275  *
 276  * @rdev: radeon_device pointer
 277  *
 278  * Stop the compute async dma queues (CIK).
 279  */
 280 static void cik_sdma_rlc_stop(struct radeon_device *rdev)
 281 {
 282         /* XXX todo */
 283 }
 284
 285 /**
 286  * cik_sdma_enable - stop the async dma engines
 287  *
 288  * @rdev: radeon_device pointer
 289  * @enable: enable/disable the DMA MEs.
 290  *
 291  * Halt or unhalt the async dma engines (CIK).
 292  */
 293 void cik_sdma_enable(struct radeon_device *rdev, bool enable)
 294 {
 295         u32 me_cntl, reg_offset;
 296         int i;
 297
 298         if (enable == false) {
 299                 cik_sdma_gfx_stop(rdev);
 300                 cik_sdma_rlc_stop(rdev);
 301         }
 302
 303         for (i = 0; i < 2; i++) {
 304                 if (i == 0)
 305                         reg_offset = SDMA0_REGISTER_OFFSET;
 306                 else
 307                         reg_offset = SDMA1_REGISTER_OFFSET;
 308                 me_cntl = RREG32(SDMA0_ME_CNTL + reg_offset);
 309                 if (enable)
 310                         me_cntl &= ~SDMA_HALT;
 311                 else
 312                         me_cntl |= SDMA_HALT;
 313                 WREG32(SDMA0_ME_CNTL + reg_offset, me_cntl);
 314         }
 315 }
 316
 317 /**
 318  * cik_sdma_gfx_resume - setup and start the async dma engines
 319  *
 320  * @rdev: radeon_device pointer
 321  *
 322  * Set up the gfx DMA ring buffers and enable them (CIK).
 323  * Returns 0 for success, error for failure.
 324  */
 325 static int cik_sdma_gfx_resume(struct radeon_device *rdev)
 326 {
 327         struct radeon_ring *ring;
 328         u32 rb_cntl, ib_cntl;
 329         u32 rb_bufsz;
 330         u32 reg_offset, wb_offset;
 331         int i, r;
 332
 333         for (i = 0; i < 2; i++) {
 334                 if (i == 0) {
 335                         ring = &rdev->ring[R600_RING_TYPE_DMA_INDEX];
 336                         reg_offset = SDMA0_REGISTER_OFFSET;
 337                         wb_offset = R600_WB_DMA_RPTR_OFFSET;
 338                 } else {
 339                         ring = &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX];
 340                         reg_offset = SDMA1_REGISTER_OFFSET;
 341                         wb_offset = CAYMAN_WB_DMA1_RPTR_OFFSET;
 342                 }
 343
 344                 WREG32(SDMA0_SEM_INCOMPLETE_TIMER_CNTL + reg_offset, 0);
 345                 WREG32(SDMA0_SEM_WAIT_FAIL_TIMER_CNTL + reg_offset, 0);
 346
 347                 /* Set ring buffer size in dwords */
 348                 rb_bufsz = order_base_2(ring->ring_size / 4);
 349                 rb_cntl = rb_bufsz << 1;
 350 #ifdef __BIG_ENDIAN
 351                 rb_cntl |= SDMA_RB_SWAP_ENABLE | SDMA_RPTR_WRITEBACK_SWAP_ENABLE;
 352 #endif
 353                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl);
 354
 355                 /* Initialize the ring buffer's read and write pointers */
 356                 WREG32(SDMA0_GFX_RB_RPTR + reg_offset, 0);
 357                 WREG32(SDMA0_GFX_RB_WPTR + reg_offset, 0);
 358
 359                 /* set the wb address whether it's enabled or not */
 360                 WREG32(SDMA0_GFX_RB_RPTR_ADDR_HI + reg_offset,
 361                        upper_32_bits(rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFF);
 362                 WREG32(SDMA0_GFX_RB_RPTR_ADDR_LO + reg_offset,
 363                        ((rdev->wb.gpu_addr + wb_offset) & 0xFFFFFFFC));
 364
 365                 if (rdev->wb.enabled)
 366                         rb_cntl |= SDMA_RPTR_WRITEBACK_ENABLE;
 367
 368                 WREG32(SDMA0_GFX_RB_BASE + reg_offset, ring->gpu_addr >> 8);
 369                 WREG32(SDMA0_GFX_RB_BASE_HI + reg_offset, ring->gpu_addr >> 40);
 370
 371                 ring->wptr = 0;
 372                 WREG32(SDMA0_GFX_RB_WPTR + reg_offset, ring->wptr << 2);
 373
 374                 /* enable DMA RB */
 375                 WREG32(SDMA0_GFX_RB_CNTL + reg_offset, rb_cntl | SDMA_RB_ENABLE);
 376
 377                 ib_cntl = SDMA_IB_ENABLE;
 378 #ifdef __BIG_ENDIAN
 379                 ib_cntl |= SDMA_IB_SWAP_ENABLE;
 380 #endif
 381                 /* enable DMA IBs */
 382                 WREG32(SDMA0_GFX_IB_CNTL + reg_offset, ib_cntl);
 383
 384                 ring->ready = true;
 385
 386                 r = radeon_ring_test(rdev, ring->idx, ring);
 387                 if (r) {
 388                         ring->ready = false;
 389                         return r;
 390                 }
 391         }
 392
 393         if ((rdev->asic->copy.copy_ring_index == R600_RING_TYPE_DMA_INDEX) ||
 394             (rdev->asic->copy.copy_ring_index == CAYMAN_RING_TYPE_DMA1_INDEX))
 395                 radeon_ttm_set_active_vram_size(rdev, rdev->mc.real_vram_size);
 396
 397         return 0;
 398 }
 399
 400 /**
 401  * cik_sdma_rlc_resume - setup and start the async dma engines
 402  *
 403  * @rdev: radeon_device pointer
 404  *
 405  * Set up the compute DMA queues and enable them (CIK).
 406  * Returns 0 for success, error for failure.
 407  */
 408 static int cik_sdma_rlc_resume(struct radeon_device *rdev)
 409 {
 410         /* XXX todo */
 411         return 0;
 412 }
 413
 414 /**
 415  * cik_sdma_load_microcode - load the sDMA ME ucode
 416  *
 417  * @rdev: radeon_device pointer
 418  *
 419  * Loads the sDMA0/1 ucode.
 420  * Returns 0 for success, -EINVAL if the ucode is not available.
 421  */
 422 static int cik_sdma_load_microcode(struct radeon_device *rdev)
 423 {
 424         int i;
 425
 426         if (!rdev->sdma_fw)
 427                 return -EINVAL;
 428
 429         /* halt the MEs */
 430         cik_sdma_enable(rdev, false);
 431
 432         if (rdev->new_fw) {
 433                 const struct sdma_firmware_header_v1_0 *hdr =
 434                         (const struct sdma_firmware_header_v1_0 *)rdev->sdma_fw->data;
 435                 const __le32 *fw_data;
 436                 u32 fw_size;
 437
 438                 radeon_ucode_print_sdma_hdr(&hdr->header);
 439
 440                 /* sdma0 */
 441                 fw_data = (const __le32 *)
 442                         (rdev->sdma_fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
 443                 fw_size = le32_to_cpu(hdr->header.ucode_size_bytes) / 4;
 444                 WREG32(SDMA0_UCODE_ADDR + SDMA0_REGISTER_OFFSET, 0);
 445                 for (i = 0; i < fw_size; i++)
 446                         WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, le32_to_cpup(fw_data++));
 447                 WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 448
 449                 /* sdma1 */
 450                 fw_data = (const __le32 *)
 451                         (rdev->sdma_fw->data + le32_to_cpu(hdr->header.ucode_array_offset_bytes));
 452                 fw_size = le32_to_cpu(hdr->header.ucode_size_bytes) / 4;
 453                 WREG32(SDMA0_UCODE_ADDR + SDMA1_REGISTER_OFFSET, 0);
 454                 for (i = 0; i < fw_size; i++)
 455                         WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, le32_to_cpup(fw_data++));
 456                 WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 457         } else {
 458                 const __be32 *fw_data;
 459
 460                 /* sdma0 */
 461                 fw_data = (const __be32 *)rdev->sdma_fw->data;
 462                 WREG32(SDMA0_UCODE_ADDR + SDMA0_REGISTER_OFFSET, 0);
 463                 for (i = 0; i < CIK_SDMA_UCODE_SIZE; i++)
 464                         WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, be32_to_cpup(fw_data++));
 465                 WREG32(SDMA0_UCODE_DATA + SDMA0_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 466
 467                 /* sdma1 */
 468                 fw_data = (const __be32 *)rdev->sdma_fw->data;
 469                 WREG32(SDMA0_UCODE_ADDR + SDMA1_REGISTER_OFFSET, 0);
 470                 for (i = 0; i < CIK_SDMA_UCODE_SIZE; i++)
 471                         WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, be32_to_cpup(fw_data++));
 472                 WREG32(SDMA0_UCODE_DATA + SDMA1_REGISTER_OFFSET, CIK_SDMA_UCODE_VERSION);
 473         }
 474
 475         WREG32(SDMA0_UCODE_ADDR + SDMA0_REGISTER_OFFSET, 0);
 476         WREG32(SDMA0_UCODE_ADDR + SDMA1_REGISTER_OFFSET, 0);
 477         return 0;
 478 }
 479
 480 /**
 481  * cik_sdma_resume - setup and start the async dma engines
 482  *
 483  * @rdev: radeon_device pointer
 484  *
 485  * Set up the DMA engines and enable them (CIK).
 486  * Returns 0 for success, error for failure.
 487  */
 488 int cik_sdma_resume(struct radeon_device *rdev)
 489 {
 490         int r;
 491
 492         r = cik_sdma_load_microcode(rdev);
 493         if (r)
 494                 return r;
 495
 496         /* unhalt the MEs */
 497         cik_sdma_enable(rdev, true);
 498
 499         /* start the gfx rings and rlc compute queues */
 500         r = cik_sdma_gfx_resume(rdev);
 501         if (r)
 502                 return r;
 503         r = cik_sdma_rlc_resume(rdev);
 504         if (r)
 505                 return r;
 506
 507         return 0;
 508 }
 509
 510 /**
 511  * cik_sdma_fini - tear down the async dma engines
 512  *
 513  * @rdev: radeon_device pointer
 514  *
 515  * Stop the async dma engines and free the rings (CIK).
 516  */
 517 void cik_sdma_fini(struct radeon_device *rdev)
 518 {
 519         /* halt the MEs */
 520         cik_sdma_enable(rdev, false);
 521         radeon_ring_fini(rdev, &rdev->ring[R600_RING_TYPE_DMA_INDEX]);
 522         radeon_ring_fini(rdev, &rdev->ring[CAYMAN_RING_TYPE_DMA1_INDEX]);
 523         /* XXX - compute dma queue tear down */
 524 }
 525
 526 /**
 527  * cik_copy_dma - copy pages using the DMA engine
 528  *
 529  * @rdev: radeon_device pointer
 530  * @src_offset: src GPU address
 531  * @dst_offset: dst GPU address
 532  * @num_gpu_pages: number of GPU pages to xfer
 533  * @fence: radeon fence object
 534  *
 535  * Copy GPU paging using the DMA engine (CIK).
 536  * Used by the radeon ttm implementation to move pages if
 537  * registered as the asic copy callback.
 538  */
 539 int cik_copy_dma(struct radeon_device *rdev,
 540                  uint64_t src_offset, uint64_t dst_offset,
 541                  unsigned num_gpu_pages,
 542                  struct radeon_fence **fence)
 543 {
 544         struct radeon_semaphore *sem = NULL;
 545         int ring_index = rdev->asic->copy.dma_ring_index;
 546         struct radeon_ring *ring = &rdev->ring[ring_index];
 547         u32 size_in_bytes, cur_size_in_bytes;
 548         int i, num_loops;
 549         int r = 0;
 550
 551         r = radeon_semaphore_create(rdev, &sem);
 552         if (r) {
 553                 DRM_ERROR("radeon: moving bo (%d).\n", r);
 554                 return r;
 555         }
 556
 557         size_in_bytes = (num_gpu_pages << RADEON_GPU_PAGE_SHIFT);
 558         num_loops = DIV_ROUND_UP(size_in_bytes, 0x1fffff);
 559         r = radeon_ring_lock(rdev, ring, num_loops * 7 + 14);
 560         if (r) {
 561                 DRM_ERROR("radeon: moving bo (%d).\n", r);
 562                 radeon_semaphore_free(rdev, &sem, NULL);
 563                 return r;
 564         }
 565
 566         radeon_semaphore_sync_to(sem, *fence);
 567         radeon_semaphore_sync_rings(rdev, sem, ring->idx);
 568
 569         for (i = 0; i < num_loops; i++) {
 570                 cur_size_in_bytes = size_in_bytes;
 571                 if (cur_size_in_bytes > 0x1fffff)
 572                         cur_size_in_bytes = 0x1fffff;
 573                 size_in_bytes -= cur_size_in_bytes;
 574                 radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_COPY, SDMA_COPY_SUB_OPCODE_LINEAR, 0));
 575                 radeon_ring_write(ring, cur_size_in_bytes);
 576                 radeon_ring_write(ring, 0); /* src/dst endian swap */
 577                 radeon_ring_write(ring, lower_32_bits(src_offset));
 578                 radeon_ring_write(ring, upper_32_bits(src_offset));
 579                 radeon_ring_write(ring, lower_32_bits(dst_offset));
 580                 radeon_ring_write(ring, upper_32_bits(dst_offset));
 581                 src_offset += cur_size_in_bytes;
 582                 dst_offset += cur_size_in_bytes;
 583         }
 584
 585         r = radeon_fence_emit(rdev, fence, ring->idx);
 586         if (r) {
 587                 radeon_ring_unlock_undo(rdev, ring);
 588                 radeon_semaphore_free(rdev, &sem, NULL);
 589                 return r;
 590         }
 591
 592         radeon_ring_unlock_commit(rdev, ring, false);
 593         radeon_semaphore_free(rdev, &sem, *fence);
 594
 595         return r;
 596 }
 597
 598 /**
 599  * cik_sdma_ring_test - simple async dma engine test
 600  *
 601  * @rdev: radeon_device pointer
 602  * @ring: radeon_ring structure holding ring information
 603  *
 604  * Test the DMA engine by writing using it to write an
 605  * value to memory. (CIK).
 606  * Returns 0 for success, error for failure.
 607  */
 608 int cik_sdma_ring_test(struct radeon_device *rdev,
 609                        struct radeon_ring *ring)
 610 {
 611         unsigned i;
 612         int r;
 613         void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
 614         u32 tmp;
 615
 616         if (!ptr) {
 617                 DRM_ERROR("invalid vram scratch pointer\n");
 618                 return -EINVAL;
 619         }
 620
 621         tmp = 0xCAFEDEAD;
 622         writel(tmp, ptr);
 623
 624         r = radeon_ring_lock(rdev, ring, 5);
 625         if (r) {
 626                 DRM_ERROR("radeon: dma failed to lock ring %d (%d).\n", ring->idx, r);
 627                 return r;
 628         }
 629         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0));
 630         radeon_ring_write(ring, rdev->vram_scratch.gpu_addr & 0xfffffffc);
 631         radeon_ring_write(ring, upper_32_bits(rdev->vram_scratch.gpu_addr));
 632         radeon_ring_write(ring, 1); /* number of DWs to follow */
 633         radeon_ring_write(ring, 0xDEADBEEF);
 634         radeon_ring_unlock_commit(rdev, ring, false);
 635
 636         for (i = 0; i < rdev->usec_timeout; i++) {
 637                 tmp = readl(ptr);
 638                 if (tmp == 0xDEADBEEF)
 639                         break;
 640                 DRM_UDELAY(1);
 641         }
 642
 643         if (i < rdev->usec_timeout) {
 644                 DRM_INFO("ring test on %d succeeded in %d usecs\n", ring->idx, i);
 645         } else {
 646                 DRM_ERROR("radeon: ring %d test failed (0x%08X)\n",
 647                           ring->idx, tmp);
 648                 r = -EINVAL;
 649         }
 650         return r;
 651 }
 652
 653 /**
 654  * cik_sdma_ib_test - test an IB on the DMA engine
 655  *
 656  * @rdev: radeon_device pointer
 657  * @ring: radeon_ring structure holding ring information
 658  *
 659  * Test a simple IB in the DMA ring (CIK).
 660  * Returns 0 on success, error on failure.
 661  */
 662 int cik_sdma_ib_test(struct radeon_device *rdev, struct radeon_ring *ring)
 663 {
 664         struct radeon_ib ib;
 665         unsigned i;
 666         int r;
 667         void __iomem *ptr = (void *)rdev->vram_scratch.ptr;
 668         u32 tmp = 0;
 669
 670         if (!ptr) {
 671                 DRM_ERROR("invalid vram scratch pointer\n");
 672                 return -EINVAL;
 673         }
 674
 675         tmp = 0xCAFEDEAD;
 676         writel(tmp, ptr);
 677
 678         r = radeon_ib_get(rdev, ring->idx, &ib, NULL, 256);
 679         if (r) {
 680                 DRM_ERROR("radeon: failed to get ib (%d).\n", r);
 681                 return r;
 682         }
 683
 684         ib.ptr[0] = SDMA_PACKET(SDMA_OPCODE_WRITE, SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 685         ib.ptr[1] = rdev->vram_scratch.gpu_addr & 0xfffffffc;
 686         ib.ptr[2] = upper_32_bits(rdev->vram_scratch.gpu_addr);
 687         ib.ptr[3] = 1;
 688         ib.ptr[4] = 0xDEADBEEF;
 689         ib.length_dw = 5;
 690
 691         r = radeon_ib_schedule(rdev, &ib, NULL, false);
 692         if (r) {
 693                 radeon_ib_free(rdev, &ib);
 694                 DRM_ERROR("radeon: failed to schedule ib (%d).\n", r);
 695                 return r;
 696         }
 697         r = radeon_fence_wait(ib.fence, false);
 698         if (r) {
 699                 DRM_ERROR("radeon: fence wait failed (%d).\n", r);
 700                 return r;
 701         }
 702         for (i = 0; i < rdev->usec_timeout; i++) {
 703                 tmp = readl(ptr);
 704                 if (tmp == 0xDEADBEEF)
 705                         break;
 706                 DRM_UDELAY(1);
 707         }
 708         if (i < rdev->usec_timeout) {
 709                 DRM_INFO("ib test on ring %d succeeded in %u usecs\n", ib.fence->ring, i);
 710         } else {
 711                 DRM_ERROR("radeon: ib test failed (0x%08X)\n", tmp);
 712                 r = -EINVAL;
 713         }
 714         radeon_ib_free(rdev, &ib);
 715         return r;
 716 }
 717
 718 /**
 719  * cik_sdma_is_lockup - Check if the DMA engine is locked up
 720  *
 721  * @rdev: radeon_device pointer
 722  * @ring: radeon_ring structure holding ring information
 723  *
 724  * Check if the async DMA engine is locked up (CIK).
 725  * Returns true if the engine appears to be locked up, false if not.
 726  */
 727 bool cik_sdma_is_lockup(struct radeon_device *rdev, struct radeon_ring *ring)
 728 {
 729         u32 reset_mask = cik_gpu_check_soft_reset(rdev);
 730         u32 mask;
 731
 732         if (ring->idx == R600_RING_TYPE_DMA_INDEX)
 733                 mask = RADEON_RESET_DMA;
 734         else
 735                 mask = RADEON_RESET_DMA1;
 736
 737         if (!(reset_mask & mask)) {
 738                 radeon_ring_lockup_update(rdev, ring);
 739                 return false;
 740         }
 741         return radeon_ring_test_lockup(rdev, ring);
 742 }
 743
 744 /**
 745  * cik_sdma_vm_copy_pages - update PTEs by copying them from the GART
 746  *
 747  * @rdev: radeon_device pointer
 748  * @ib: indirect buffer to fill with commands
 749  * @pe: addr of the page entry
 750  * @src: src addr to copy from
 751  * @count: number of page entries to update
 752  *
 753  * Update PTEs by copying them from the GART using sDMA (CIK).
 754  */
 755 void cik_sdma_vm_copy_pages(struct radeon_device *rdev,
 756                             struct radeon_ib *ib,
 757                             uint64_t pe, uint64_t src,
 758                             unsigned count)
 759 {
 760         while (count) {
 761                 unsigned bytes = count * 8;
 762                 if (bytes > 0x1FFFF8)
 763                         bytes = 0x1FFFF8;
 764
 765                 ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_COPY,
 766                         SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 767                 ib->ptr[ib->length_dw++] = bytes;
 768                 ib->ptr[ib->length_dw++] = 0; /* src/dst endian swap */
 769                 ib->ptr[ib->length_dw++] = lower_32_bits(src);
 770                 ib->ptr[ib->length_dw++] = upper_32_bits(src);
 771                 ib->ptr[ib->length_dw++] = lower_32_bits(pe);
 772                 ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 773
 774                 pe += bytes;
 775                 src += bytes;
 776                 count -= bytes / 8;
 777         }
 778 }
 779
 780 /**
 781  * cik_sdma_vm_write_pages - update PTEs by writing them manually
 782  *
 783  * @rdev: radeon_device pointer
 784  * @ib: indirect buffer to fill with commands
 785  * @pe: addr of the page entry
 786  * @addr: dst addr to write into pe
 787  * @count: number of page entries to update
 788  * @incr: increase next addr by incr bytes
 789  * @flags: access flags
 790  *
 791  * Update PTEs by writing them manually using sDMA (CIK).
 792  */
 793 void cik_sdma_vm_write_pages(struct radeon_device *rdev,
 794                              struct radeon_ib *ib,
 795                              uint64_t pe,
 796                              uint64_t addr, unsigned count,
 797                              uint32_t incr, uint32_t flags)
 798 {
 799         uint64_t value;
 800         unsigned ndw;
 801
 802         while (count) {
 803                 ndw = count * 2;
 804                 if (ndw > 0xFFFFE)
 805                         ndw = 0xFFFFE;
 806
 807                 /* for non-physically contiguous pages (system) */
 808                 ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_WRITE,
 809                         SDMA_WRITE_SUB_OPCODE_LINEAR, 0);
 810                 ib->ptr[ib->length_dw++] = pe;
 811                 ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 812                 ib->ptr[ib->length_dw++] = ndw;
 813                 for (; ndw > 0; ndw -= 2, --count, pe += 8) {
 814                         if (flags & R600_PTE_SYSTEM) {
 815                                 value = radeon_vm_map_gart(rdev, addr);
 816                                 value &= 0xFFFFFFFFFFFFF000ULL;
 817                         } else if (flags & R600_PTE_VALID) {
 818                                 value = addr;
 819                         } else {
 820                                 value = 0;
 821                         }
 822                         addr += incr;
 823                         value |= flags;
 824                         ib->ptr[ib->length_dw++] = value;
 825                         ib->ptr[ib->length_dw++] = upper_32_bits(value);
 826                 }
 827         }
 828 }
 829
 830 /**
 831  * cik_sdma_vm_set_pages - update the page tables using sDMA
 832  *
 833  * @rdev: radeon_device pointer
 834  * @ib: indirect buffer to fill with commands
 835  * @pe: addr of the page entry
 836  * @addr: dst addr to write into pe
 837  * @count: number of page entries to update
 838  * @incr: increase next addr by incr bytes
 839  * @flags: access flags
 840  *
 841  * Update the page tables using sDMA (CIK).
 842  */
 843 void cik_sdma_vm_set_pages(struct radeon_device *rdev,
 844                            struct radeon_ib *ib,
 845                            uint64_t pe,
 846                            uint64_t addr, unsigned count,
 847                            uint32_t incr, uint32_t flags)
 848 {
 849         uint64_t value;
 850         unsigned ndw;
 851
 852         while (count) {
 853                 ndw = count;
 854                 if (ndw > 0x7FFFF)
 855                         ndw = 0x7FFFF;
 856
 857                 if (flags & R600_PTE_VALID)
 858                         value = addr;
 859                 else
 860                         value = 0;
 861
 862                 /* for physically contiguous pages (vram) */
 863                 ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_GENERATE_PTE_PDE, 0, 0);
 864                 ib->ptr[ib->length_dw++] = pe; /* dst addr */
 865                 ib->ptr[ib->length_dw++] = upper_32_bits(pe);
 866                 ib->ptr[ib->length_dw++] = flags; /* mask */
 867                 ib->ptr[ib->length_dw++] = 0;
 868                 ib->ptr[ib->length_dw++] = value; /* value */
 869                 ib->ptr[ib->length_dw++] = upper_32_bits(value);
 870                 ib->ptr[ib->length_dw++] = incr; /* increment size */
 871                 ib->ptr[ib->length_dw++] = 0;
 872                 ib->ptr[ib->length_dw++] = ndw; /* number of entries */
 873
 874                 pe += ndw * 8;
 875                 addr += ndw * incr;
 876                 count -= ndw;
 877         }
 878 }
 879
 880 /**
 881  * cik_sdma_vm_pad_ib - pad the IB to the required number of dw
 882  *
 883  * @ib: indirect buffer to fill with padding
 884  *
 885  */
 886 void cik_sdma_vm_pad_ib(struct radeon_ib *ib)
 887 {
 888         while (ib->length_dw & 0x7)
 889                 ib->ptr[ib->length_dw++] = SDMA_PACKET(SDMA_OPCODE_NOP, 0, 0);
 890 }
 891
 892 /**
 893  * cik_dma_vm_flush - cik vm flush using sDMA
 894  *
 895  * @rdev: radeon_device pointer
 896  *
 897  * Update the page table base and flush the VM TLB
 898  * using sDMA (CIK).
 899  */
 900 void cik_dma_vm_flush(struct radeon_device *rdev, int ridx, struct radeon_vm *vm)
 901 {
 902         struct radeon_ring *ring = &rdev->ring[ridx];
 903
 904         if (vm == NULL)
 905                 return;
 906
 907         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 908         if (vm->id < 8) {
 909                 radeon_ring_write(ring, (VM_CONTEXT0_PAGE_TABLE_BASE_ADDR + (vm->id << 2)) >> 2);
 910         } else {
 911                 radeon_ring_write(ring, (VM_CONTEXT8_PAGE_TABLE_BASE_ADDR + ((vm->id - 8) << 2)) >> 2);
 912         }
 913         radeon_ring_write(ring, vm->pd_gpu_addr >> 12);
 914
 915         /* update SH_MEM_* regs */
 916         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 917         radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
 918         radeon_ring_write(ring, VMID(vm->id));
 919
 920         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 921         radeon_ring_write(ring, SH_MEM_BASES >> 2);
 922         radeon_ring_write(ring, 0);
 923
 924         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 925         radeon_ring_write(ring, SH_MEM_CONFIG >> 2);
 926         radeon_ring_write(ring, 0);
 927
 928         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 929         radeon_ring_write(ring, SH_MEM_APE1_BASE >> 2);
 930         radeon_ring_write(ring, 1);
 931
 932         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 933         radeon_ring_write(ring, SH_MEM_APE1_LIMIT >> 2);
 934         radeon_ring_write(ring, 0);
 935
 936         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 937         radeon_ring_write(ring, SRBM_GFX_CNTL >> 2);
 938         radeon_ring_write(ring, VMID(0));
 939
 940         /* flush HDP */
 941         cik_sdma_hdp_flush_ring_emit(rdev, ridx);
 942
 943         /* flush TLB */
 944         radeon_ring_write(ring, SDMA_PACKET(SDMA_OPCODE_SRBM_WRITE, 0, 0xf000));
 945         radeon_ring_write(ring, VM_INVALIDATE_REQUEST >> 2);
 946         radeon_ring_write(ring, 1 << vm->id);
 947 }
 948