drivers/gpu/drm/radeon/rs400.c

   1 /*
   2  * Copyright 2008 Advanced Micro Devices, Inc.
   3  * Copyright 2008 Red Hat Inc.
   4  * Copyright 2009 Jerome Glisse.
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the "Software"),
   8  * to deal in the Software without restriction, including without limitation
   9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
  10  * and/or sell copies of the Software, and to permit persons to whom the
  11  * Software is furnished to do so, subject to the following conditions:
  12  *
  13  * The above copyright notice and this permission notice shall be included in
  14  * all copies or substantial portions of the Software.
  15  *
  16  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  17  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  18  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  19  * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
  20  * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
  21  * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
  22  * OTHER DEALINGS IN THE SOFTWARE.
  23  *
  24  * Authors: Dave Airlie
  25  *          Alex Deucher
  26  *          Jerome Glisse
  27  */
  28
  29 #include <linux/debugfs.h>
  30 #include <linux/seq_file.h>
  31 #include <linux/slab.h>
  32
  33 #include <drm/drm_device.h>
  34 #include <drm/drm_file.h>
  35
  36 #include "radeon.h"
  37 #include "radeon_asic.h"
  38 #include "rs400d.h"
  39
  40 /* This files gather functions specifics to : rs400,rs480 */
  41 static void rs400_debugfs_pcie_gart_info_init(struct radeon_device *rdev);
  42
  43 void rs400_gart_adjust_size(struct radeon_device *rdev)
  44 {
  45         /* Check gart size */
  46         switch (rdev->mc.gtt_size/(1024*1024)) {
  47         case 32:
  48         case 64:
  49         case 128:
  50         case 256:
  51         case 512:
  52         case 1024:
  53         case 2048:
  54                 break;
  55         default:
  56                 DRM_ERROR("Unable to use IGP GART size %uM\n",
  57                           (unsigned)(rdev->mc.gtt_size >> 20));
  58                 DRM_ERROR("Valid GART size for IGP are 32M,64M,128M,256M,512M,1G,2G\n");
  59                 DRM_ERROR("Forcing to 32M GART size\n");
  60                 rdev->mc.gtt_size = 32 * 1024 * 1024;
  61                 return;
  62         }
  63 }
  64
  65 void rs400_gart_tlb_flush(struct radeon_device *rdev)
  66 {
  67         uint32_t tmp;
  68         unsigned int timeout = rdev->usec_timeout;
  69
  70         WREG32_MC(RS480_GART_CACHE_CNTRL, RS480_GART_CACHE_INVALIDATE);
  71         do {
  72                 tmp = RREG32_MC(RS480_GART_CACHE_CNTRL);
  73                 if ((tmp & RS480_GART_CACHE_INVALIDATE) == 0)
  74                         break;
  75                 udelay(1);
  76                 timeout--;
  77         } while (timeout > 0);
  78         WREG32_MC(RS480_GART_CACHE_CNTRL, 0);
  79 }
  80
  81 int rs400_gart_init(struct radeon_device *rdev)
  82 {
  83         int r;
  84
  85         if (rdev->gart.ptr) {
  86                 WARN(1, "RS400 GART already initialized\n");
  87                 return 0;
  88         }
  89         /* Check gart size */
  90         switch (rdev->mc.gtt_size / (1024 * 1024)) {
  91         case 32:
  92         case 64:
  93         case 128:
  94         case 256:
  95         case 512:
  96         case 1024:
  97         case 2048:
  98                 break;
  99         default:
 100                 return -EINVAL;
 101         }
 102         /* Initialize common gart structure */
 103         r = radeon_gart_init(rdev);
 104         if (r)
 105                 return r;
 106         rs400_debugfs_pcie_gart_info_init(rdev);
 107         rdev->gart.table_size = rdev->gart.num_gpu_pages * 4;
 108         return radeon_gart_table_ram_alloc(rdev);
 109 }
 110
 111 int rs400_gart_enable(struct radeon_device *rdev)
 112 {
 113         uint32_t size_reg;
 114         uint32_t tmp;
 115
 116         tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
 117         tmp |= RS690_DIS_OUT_OF_PCI_GART_ACCESS;
 118         WREG32_MC(RS690_AIC_CTRL_SCRATCH, tmp);
 119         /* Check gart size */
 120         switch (rdev->mc.gtt_size / (1024 * 1024)) {
 121         case 32:
 122                 size_reg = RS480_VA_SIZE_32MB;
 123                 break;
 124         case 64:
 125                 size_reg = RS480_VA_SIZE_64MB;
 126                 break;
 127         case 128:
 128                 size_reg = RS480_VA_SIZE_128MB;
 129                 break;
 130         case 256:
 131                 size_reg = RS480_VA_SIZE_256MB;
 132                 break;
 133         case 512:
 134                 size_reg = RS480_VA_SIZE_512MB;
 135                 break;
 136         case 1024:
 137                 size_reg = RS480_VA_SIZE_1GB;
 138                 break;
 139         case 2048:
 140                 size_reg = RS480_VA_SIZE_2GB;
 141                 break;
 142         default:
 143                 return -EINVAL;
 144         }
 145         /* It should be fine to program it to max value */
 146         if (rdev->family == CHIP_RS690 || (rdev->family == CHIP_RS740)) {
 147                 WREG32_MC(RS690_MCCFG_AGP_BASE, 0xFFFFFFFF);
 148                 WREG32_MC(RS690_MCCFG_AGP_BASE_2, 0);
 149         } else {
 150                 WREG32(RADEON_AGP_BASE, 0xFFFFFFFF);
 151                 WREG32(RS480_AGP_BASE_2, 0);
 152         }
 153         tmp = REG_SET(RS690_MC_AGP_TOP, rdev->mc.gtt_end >> 16);
 154         tmp |= REG_SET(RS690_MC_AGP_START, rdev->mc.gtt_start >> 16);
 155         if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) {
 156                 WREG32_MC(RS690_MCCFG_AGP_LOCATION, tmp);
 157                 tmp = RREG32(RADEON_BUS_CNTL) & ~RS600_BUS_MASTER_DIS;
 158                 WREG32(RADEON_BUS_CNTL, tmp);
 159         } else {
 160                 WREG32(RADEON_MC_AGP_LOCATION, tmp);
 161                 tmp = RREG32(RADEON_BUS_CNTL) & ~RADEON_BUS_MASTER_DIS;
 162                 WREG32(RADEON_BUS_CNTL, tmp);
 163         }
 164         /* Table should be in 32bits address space so ignore bits above. */
 165         tmp = (u32)rdev->gart.table_addr & 0xfffff000;
 166         tmp |= (upper_32_bits(rdev->gart.table_addr) & 0xff) << 4;
 167
 168         WREG32_MC(RS480_GART_BASE, tmp);
 169         /* TODO: more tweaking here */
 170         WREG32_MC(RS480_GART_FEATURE_ID,
 171                   (RS480_TLB_ENABLE |
 172                    RS480_GTW_LAC_EN | RS480_1LEVEL_GART));
 173         /* Disable snooping */
 174         WREG32_MC(RS480_AGP_MODE_CNTL,
 175                   (1 << RS480_REQ_TYPE_SNOOP_SHIFT) | RS480_REQ_TYPE_SNOOP_DIS);
 176         /* Disable AGP mode */
 177         /* FIXME: according to doc we should set HIDE_MMCFG_BAR=0,
 178          * AGPMODE30=0 & AGP30ENHANCED=0 in NB_CNTL */
 179         if ((rdev->family == CHIP_RS690) || (rdev->family == CHIP_RS740)) {
 180                 tmp = RREG32_MC(RS480_MC_MISC_CNTL);
 181                 tmp |= RS480_GART_INDEX_REG_EN | RS690_BLOCK_GFX_D3_EN;
 182                 WREG32_MC(RS480_MC_MISC_CNTL, tmp);
 183         } else {
 184                 tmp = RREG32_MC(RS480_MC_MISC_CNTL);
 185                 tmp |= RS480_GART_INDEX_REG_EN;
 186                 WREG32_MC(RS480_MC_MISC_CNTL, tmp);
 187         }
 188         /* Enable gart */
 189         WREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE, (RS480_GART_EN | size_reg));
 190         rs400_gart_tlb_flush(rdev);
 191         DRM_INFO("PCIE GART of %uM enabled (table at 0x%016llX).\n",
 192                  (unsigned)(rdev->mc.gtt_size >> 20),
 193                  (unsigned long long)rdev->gart.table_addr);
 194         rdev->gart.ready = true;
 195         return 0;
 196 }
 197
 198 void rs400_gart_disable(struct radeon_device *rdev)
 199 {
 200         uint32_t tmp;
 201
 202         tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
 203         tmp |= RS690_DIS_OUT_OF_PCI_GART_ACCESS;
 204         WREG32_MC(RS690_AIC_CTRL_SCRATCH, tmp);
 205         WREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE, 0);
 206 }
 207
 208 void rs400_gart_fini(struct radeon_device *rdev)
 209 {
 210         radeon_gart_fini(rdev);
 211         rs400_gart_disable(rdev);
 212         radeon_gart_table_ram_free(rdev);
 213 }
 214
 215 #define RS400_PTE_UNSNOOPED (1 << 0)
 216 #define RS400_PTE_WRITEABLE (1 << 2)
 217 #define RS400_PTE_READABLE  (1 << 3)
 218
 219 uint64_t rs400_gart_get_page_entry(uint64_t addr, uint32_t flags)
 220 {
 221         uint32_t entry;
 222
 223         entry = (lower_32_bits(addr) & PAGE_MASK) |
 224                 ((upper_32_bits(addr) & 0xff) << 4);
 225         if (flags & RADEON_GART_PAGE_READ)
 226                 entry |= RS400_PTE_READABLE;
 227         if (flags & RADEON_GART_PAGE_WRITE)
 228                 entry |= RS400_PTE_WRITEABLE;
 229         if (!(flags & RADEON_GART_PAGE_SNOOP))
 230                 entry |= RS400_PTE_UNSNOOPED;
 231         return entry;
 232 }
 233
 234 void rs400_gart_set_page(struct radeon_device *rdev, unsigned i,
 235                          uint64_t entry)
 236 {
 237         u32 *gtt = rdev->gart.ptr;
 238         gtt[i] = cpu_to_le32(lower_32_bits(entry));
 239 }
 240
 241 int rs400_mc_wait_for_idle(struct radeon_device *rdev)
 242 {
 243         unsigned i;
 244         uint32_t tmp;
 245
 246         for (i = 0; i < rdev->usec_timeout; i++) {
 247                 /* read MC_STATUS */
 248                 tmp = RREG32(RADEON_MC_STATUS);
 249                 if (tmp & RADEON_MC_IDLE) {
 250                         return 0;
 251                 }
 252                 udelay(1);
 253         }
 254         return -1;
 255 }
 256
 257 static void rs400_gpu_init(struct radeon_device *rdev)
 258 {
 259         /* FIXME: is this correct ? */
 260         r420_pipes_init(rdev);
 261         if (rs400_mc_wait_for_idle(rdev)) {
 262                 pr_warn("rs400: Failed to wait MC idle while programming pipes. Bad things might happen. %08x\n",
 263                         RREG32(RADEON_MC_STATUS));
 264         }
 265 }
 266
 267 static void rs400_mc_init(struct radeon_device *rdev)
 268 {
 269         u64 base;
 270
 271         rs400_gart_adjust_size(rdev);
 272         rdev->mc.igp_sideport_enabled = radeon_combios_sideport_present(rdev);
 273         /* DDR for all card after R300 & IGP */
 274         rdev->mc.vram_is_ddr = true;
 275         rdev->mc.vram_width = 128;
 276         r100_vram_init_sizes(rdev);
 277         base = (RREG32(RADEON_NB_TOM) & 0xffff) << 16;
 278         radeon_vram_location(rdev, &rdev->mc, base);
 279         rdev->mc.gtt_base_align = rdev->mc.gtt_size - 1;
 280         radeon_gtt_location(rdev, &rdev->mc);
 281         radeon_update_bandwidth_info(rdev);
 282 }
 283
 284 uint32_t rs400_mc_rreg(struct radeon_device *rdev, uint32_t reg)
 285 {
 286         unsigned long flags;
 287         uint32_t r;
 288
 289         spin_lock_irqsave(&rdev->mc_idx_lock, flags);
 290         WREG32(RS480_NB_MC_INDEX, reg & 0xff);
 291         r = RREG32(RS480_NB_MC_DATA);
 292         WREG32(RS480_NB_MC_INDEX, 0xff);
 293         spin_unlock_irqrestore(&rdev->mc_idx_lock, flags);
 294         return r;
 295 }
 296
 297 void rs400_mc_wreg(struct radeon_device *rdev, uint32_t reg, uint32_t v)
 298 {
 299         unsigned long flags;
 300
 301         spin_lock_irqsave(&rdev->mc_idx_lock, flags);
 302         WREG32(RS480_NB_MC_INDEX, ((reg) & 0xff) | RS480_NB_MC_IND_WR_EN);
 303         WREG32(RS480_NB_MC_DATA, (v));
 304         WREG32(RS480_NB_MC_INDEX, 0xff);
 305         spin_unlock_irqrestore(&rdev->mc_idx_lock, flags);
 306 }
 307
 308 #if defined(CONFIG_DEBUG_FS)
 309 static int rs400_debugfs_gart_info_show(struct seq_file *m, void *unused)
 310 {
 311         struct radeon_device *rdev = m->private;
 312         uint32_t tmp;
 313
 314         tmp = RREG32(RADEON_HOST_PATH_CNTL);
 315         seq_printf(m, "HOST_PATH_CNTL 0x%08x\n", tmp);
 316         tmp = RREG32(RADEON_BUS_CNTL);
 317         seq_printf(m, "BUS_CNTL 0x%08x\n", tmp);
 318         tmp = RREG32_MC(RS690_AIC_CTRL_SCRATCH);
 319         seq_printf(m, "AIC_CTRL_SCRATCH 0x%08x\n", tmp);
 320         if (rdev->family == CHIP_RS690 || (rdev->family == CHIP_RS740)) {
 321                 tmp = RREG32_MC(RS690_MCCFG_AGP_BASE);
 322                 seq_printf(m, "MCCFG_AGP_BASE 0x%08x\n", tmp);
 323                 tmp = RREG32_MC(RS690_MCCFG_AGP_BASE_2);
 324                 seq_printf(m, "MCCFG_AGP_BASE_2 0x%08x\n", tmp);
 325                 tmp = RREG32_MC(RS690_MCCFG_AGP_LOCATION);
 326                 seq_printf(m, "MCCFG_AGP_LOCATION 0x%08x\n", tmp);
 327                 tmp = RREG32_MC(RS690_MCCFG_FB_LOCATION);
 328                 seq_printf(m, "MCCFG_FB_LOCATION 0x%08x\n", tmp);
 329                 tmp = RREG32(RS690_HDP_FB_LOCATION);
 330                 seq_printf(m, "HDP_FB_LOCATION 0x%08x\n", tmp);
 331         } else {
 332                 tmp = RREG32(RADEON_AGP_BASE);
 333                 seq_printf(m, "AGP_BASE 0x%08x\n", tmp);
 334                 tmp = RREG32(RS480_AGP_BASE_2);
 335                 seq_printf(m, "AGP_BASE_2 0x%08x\n", tmp);
 336                 tmp = RREG32(RADEON_MC_AGP_LOCATION);
 337                 seq_printf(m, "MC_AGP_LOCATION 0x%08x\n", tmp);
 338         }
 339         tmp = RREG32_MC(RS480_GART_BASE);
 340         seq_printf(m, "GART_BASE 0x%08x\n", tmp);
 341         tmp = RREG32_MC(RS480_GART_FEATURE_ID);
 342         seq_printf(m, "GART_FEATURE_ID 0x%08x\n", tmp);
 343         tmp = RREG32_MC(RS480_AGP_MODE_CNTL);
 344         seq_printf(m, "AGP_MODE_CONTROL 0x%08x\n", tmp);
 345         tmp = RREG32_MC(RS480_MC_MISC_CNTL);
 346         seq_printf(m, "MC_MISC_CNTL 0x%08x\n", tmp);
 347         tmp = RREG32_MC(0x5F);
 348         seq_printf(m, "MC_MISC_UMA_CNTL 0x%08x\n", tmp);
 349         tmp = RREG32_MC(RS480_AGP_ADDRESS_SPACE_SIZE);
 350         seq_printf(m, "AGP_ADDRESS_SPACE_SIZE 0x%08x\n", tmp);
 351         tmp = RREG32_MC(RS480_GART_CACHE_CNTRL);
 352         seq_printf(m, "GART_CACHE_CNTRL 0x%08x\n", tmp);
 353         tmp = RREG32_MC(0x3B);
 354         seq_printf(m, "MC_GART_ERROR_ADDRESS 0x%08x\n", tmp);
 355         tmp = RREG32_MC(0x3C);
 356         seq_printf(m, "MC_GART_ERROR_ADDRESS_HI 0x%08x\n", tmp);
 357         tmp = RREG32_MC(0x30);
 358         seq_printf(m, "GART_ERROR_0 0x%08x\n", tmp);
 359         tmp = RREG32_MC(0x31);
 360         seq_printf(m, "GART_ERROR_1 0x%08x\n", tmp);
 361         tmp = RREG32_MC(0x32);
 362         seq_printf(m, "GART_ERROR_2 0x%08x\n", tmp);
 363         tmp = RREG32_MC(0x33);
 364         seq_printf(m, "GART_ERROR_3 0x%08x\n", tmp);
 365         tmp = RREG32_MC(0x34);
 366         seq_printf(m, "GART_ERROR_4 0x%08x\n", tmp);
 367         tmp = RREG32_MC(0x35);
 368         seq_printf(m, "GART_ERROR_5 0x%08x\n", tmp);
 369         tmp = RREG32_MC(0x36);
 370         seq_printf(m, "GART_ERROR_6 0x%08x\n", tmp);
 371         tmp = RREG32_MC(0x37);
 372         seq_printf(m, "GART_ERROR_7 0x%08x\n", tmp);
 373         return 0;
 374 }
 375
 376 DEFINE_SHOW_ATTRIBUTE(rs400_debugfs_gart_info);
 377 #endif
 378
 379 static void rs400_debugfs_pcie_gart_info_init(struct radeon_device *rdev)
 380 {
 381 #if defined(CONFIG_DEBUG_FS)
 382         struct dentry *root = rdev_to_drm(rdev)->primary->debugfs_root;
 383
 384         debugfs_create_file("rs400_gart_info", 0444, root, rdev,
 385                             &rs400_debugfs_gart_info_fops);
 386 #endif
 387 }
 388
 389 static void rs400_mc_program(struct radeon_device *rdev)
 390 {
 391         struct r100_mc_save save;
 392
 393         /* Stops all mc clients */
 394         r100_mc_stop(rdev, &save);
 395
 396         /* Wait for mc idle */
 397         if (rs400_mc_wait_for_idle(rdev))
 398                 dev_warn(rdev->dev, "rs400: Wait MC idle timeout before updating MC.\n");
 399         WREG32(R_000148_MC_FB_LOCATION,
 400                 S_000148_MC_FB_START(rdev->mc.vram_start >> 16) |
 401                 S_000148_MC_FB_TOP(rdev->mc.vram_end >> 16));
 402
 403         r100_mc_resume(rdev, &save);
 404 }
 405
 406 static int rs400_startup(struct radeon_device *rdev)
 407 {
 408         int r;
 409
 410         r100_set_common_regs(rdev);
 411
 412         rs400_mc_program(rdev);
 413         /* Resume clock */
 414         r300_clock_startup(rdev);
 415         /* Initialize GPU configuration (# pipes, ...) */
 416         rs400_gpu_init(rdev);
 417         r100_enable_bm(rdev);
 418         /* Initialize GART (initialize after TTM so we can allocate
 419          * memory through TTM but finalize after TTM) */
 420         r = rs400_gart_enable(rdev);
 421         if (r)
 422                 return r;
 423
 424         /* allocate wb buffer */
 425         r = radeon_wb_init(rdev);
 426         if (r)
 427                 return r;
 428
 429         r = radeon_fence_driver_start_ring(rdev, RADEON_RING_TYPE_GFX_INDEX);
 430         if (r) {
 431                 dev_err(rdev->dev, "failed initializing CP fences (%d).\n", r);
 432                 return r;
 433         }
 434
 435         /* Enable IRQ */
 436         if (!rdev->irq.installed) {
 437                 r = radeon_irq_kms_init(rdev);
 438                 if (r)
 439                         return r;
 440         }
 441
 442         r100_irq_set(rdev);
 443         rdev->config.r300.hdp_cntl = RREG32(RADEON_HOST_PATH_CNTL);
 444         /* 1M ring buffer */
 445         r = r100_cp_init(rdev, 1024 * 1024);
 446         if (r) {
 447                 dev_err(rdev->dev, "failed initializing CP (%d).\n", r);
 448                 return r;
 449         }
 450
 451         r = radeon_ib_pool_init(rdev);
 452         if (r) {
 453                 dev_err(rdev->dev, "IB initialization failed (%d).\n", r);
 454                 return r;
 455         }
 456
 457         return 0;
 458 }
 459
 460 int rs400_resume(struct radeon_device *rdev)
 461 {
 462         int r;
 463
 464         /* Make sur GART are not working */
 465         rs400_gart_disable(rdev);
 466         /* Resume clock before doing reset */
 467         r300_clock_startup(rdev);
 468         /* setup MC before calling post tables */
 469         rs400_mc_program(rdev);
 470         /* Reset gpu before posting otherwise ATOM will enter infinite loop */
 471         if (radeon_asic_reset(rdev)) {
 472                 dev_warn(rdev->dev, "GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
 473                         RREG32(R_000E40_RBBM_STATUS),
 474                         RREG32(R_0007C0_CP_STAT));
 475         }
 476         /* post */
 477         radeon_combios_asic_init(rdev_to_drm(rdev));
 478         /* Resume clock after posting */
 479         r300_clock_startup(rdev);
 480         /* Initialize surface registers */
 481         radeon_surface_init(rdev);
 482
 483         rdev->accel_working = true;
 484         r = rs400_startup(rdev);
 485         if (r) {
 486                 rdev->accel_working = false;
 487         }
 488         return r;
 489 }
 490
 491 int rs400_suspend(struct radeon_device *rdev)
 492 {
 493         radeon_pm_suspend(rdev);
 494         r100_cp_disable(rdev);
 495         radeon_wb_disable(rdev);
 496         r100_irq_disable(rdev);
 497         rs400_gart_disable(rdev);
 498         return 0;
 499 }
 500
 501 void rs400_fini(struct radeon_device *rdev)
 502 {
 503         radeon_pm_fini(rdev);
 504         r100_cp_fini(rdev);
 505         radeon_wb_fini(rdev);
 506         radeon_ib_pool_fini(rdev);
 507         radeon_gem_fini(rdev);
 508         rs400_gart_fini(rdev);
 509         radeon_irq_kms_fini(rdev);
 510         radeon_fence_driver_fini(rdev);
 511         radeon_bo_fini(rdev);
 512         radeon_atombios_fini(rdev);
 513         kfree(rdev->bios);
 514         rdev->bios = NULL;
 515 }
 516
 517 int rs400_init(struct radeon_device *rdev)
 518 {
 519         int r;
 520
 521         /* Disable VGA */
 522         r100_vga_render_disable(rdev);
 523         /* Initialize scratch registers */
 524         radeon_scratch_init(rdev);
 525         /* Initialize surface registers */
 526         radeon_surface_init(rdev);
 527         /* TODO: disable VGA need to use VGA request */
 528         /* restore some register to sane defaults */
 529         r100_restore_sanity(rdev);
 530         /* BIOS*/
 531         if (!radeon_get_bios(rdev)) {
 532                 if (ASIC_IS_AVIVO(rdev))
 533                         return -EINVAL;
 534         }
 535         if (rdev->is_atom_bios) {
 536                 dev_err(rdev->dev, "Expecting combios for RS400/RS480 GPU\n");
 537                 return -EINVAL;
 538         } else {
 539                 r = radeon_combios_init(rdev);
 540                 if (r)
 541                         return r;
 542         }
 543         /* Reset gpu before posting otherwise ATOM will enter infinite loop */
 544         if (radeon_asic_reset(rdev)) {
 545                 dev_warn(rdev->dev,
 546                         "GPU reset failed ! (0xE40=0x%08X, 0x7C0=0x%08X)\n",
 547                         RREG32(R_000E40_RBBM_STATUS),
 548                         RREG32(R_0007C0_CP_STAT));
 549         }
 550         /* check if cards are posted or not */
 551         if (radeon_boot_test_post_card(rdev) == false)
 552                 return -EINVAL;
 553
 554         /* Initialize clocks */
 555         radeon_get_clock_info(rdev_to_drm(rdev));
 556         /* initialize memory controller */
 557         rs400_mc_init(rdev);
 558         /* Fence driver */
 559         radeon_fence_driver_init(rdev);
 560         /* Memory manager */
 561         r = radeon_bo_init(rdev);
 562         if (r)
 563                 return r;
 564         r = rs400_gart_init(rdev);
 565         if (r)
 566                 return r;
 567         r300_set_reg_safe(rdev);
 568
 569         /* Initialize power management */
 570         radeon_pm_init(rdev);
 571
 572         rdev->accel_working = true;
 573         r = rs400_startup(rdev);
 574         if (r) {
 575                 /* Somethings want wront with the accel init stop accel */
 576                 dev_err(rdev->dev, "Disabling GPU acceleration\n");
 577                 r100_cp_fini(rdev);
 578                 radeon_wb_fini(rdev);
 579                 radeon_ib_pool_fini(rdev);
 580                 rs400_gart_fini(rdev);
 581                 radeon_irq_kms_fini(rdev);
 582                 rdev->accel_working = false;
 583         }
 584         return 0;
 585 }