drivers/gpu/drm/radeon/radeon_device.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 #include <linux/console.h>
  29 #include <linux/slab.h>
  30 #include <drm/drmP.h>
  31 #include <drm/drm_crtc_helper.h>
  32 #include <drm/radeon_drm.h>
  33 #include <linux/vgaarb.h>
  34 #include <linux/vga_switcheroo.h>
  35 #include "radeon_reg.h"
  36 #include "radeon.h"
  37 #include "atom.h"
  38
  39 static const char radeon_family_name[][16] = {
  40         "R100",
  41         "RV100",
  42         "RS100",
  43         "RV200",
  44         "RS200",
  45         "R200",
  46         "RV250",
  47         "RS300",
  48         "RV280",
  49         "R300",
  50         "R350",
  51         "RV350",
  52         "RV380",
  53         "R420",
  54         "R423",
  55         "RV410",
  56         "RS400",
  57         "RS480",
  58         "RS600",
  59         "RS690",
  60         "RS740",
  61         "RV515",
  62         "R520",
  63         "RV530",
  64         "RV560",
  65         "RV570",
  66         "R580",
  67         "R600",
  68         "RV610",
  69         "RV630",
  70         "RV670",
  71         "RV620",
  72         "RV635",
  73         "RS780",
  74         "RS880",
  75         "RV770",
  76         "RV730",
  77         "RV710",
  78         "RV740",
  79         "CEDAR",
  80         "REDWOOD",
  81         "JUNIPER",
  82         "CYPRESS",
  83         "HEMLOCK",
  84         "PALM",
  85         "LAST",
  86 };
  87
  88 /*
  89  * Clear GPU surface registers.
  90  */
  91 void radeon_surface_init(struct radeon_device *rdev)
  92 {
  93         /* FIXME: check this out */
  94         if (rdev->family < CHIP_R600) {
  95                 int i;
  96
  97                 for (i = 0; i < RADEON_GEM_MAX_SURFACES; i++) {
  98                         if (rdev->surface_regs[i].bo)
  99                                 radeon_bo_get_surface_reg(rdev->surface_regs[i].bo);
 100                         else
 101                                 radeon_clear_surface_reg(rdev, i);
 102                 }
 103                 /* enable surfaces */
 104                 WREG32(RADEON_SURFACE_CNTL, 0);
 105         }
 106 }
 107
 108 /*
 109  * GPU scratch registers helpers function.
 110  */
 111 void radeon_scratch_init(struct radeon_device *rdev)
 112 {
 113         int i;
 114
 115         /* FIXME: check this out */
 116         if (rdev->family < CHIP_R300) {
 117                 rdev->scratch.num_reg = 5;
 118         } else {
 119                 rdev->scratch.num_reg = 7;
 120         }
 121         rdev->scratch.reg_base = RADEON_SCRATCH_REG0;
 122         for (i = 0; i < rdev->scratch.num_reg; i++) {
 123                 rdev->scratch.free[i] = true;
 124                 rdev->scratch.reg[i] = rdev->scratch.reg_base + (i * 4);
 125         }
 126 }
 127
 128 int radeon_scratch_get(struct radeon_device *rdev, uint32_t *reg)
 129 {
 130         int i;
 131
 132         for (i = 0; i < rdev->scratch.num_reg; i++) {
 133                 if (rdev->scratch.free[i]) {
 134                         rdev->scratch.free[i] = false;
 135                         *reg = rdev->scratch.reg[i];
 136                         return 0;
 137                 }
 138         }
 139         return -EINVAL;
 140 }
 141
 142 void radeon_scratch_free(struct radeon_device *rdev, uint32_t reg)
 143 {
 144         int i;
 145
 146         for (i = 0; i < rdev->scratch.num_reg; i++) {
 147                 if (rdev->scratch.reg[i] == reg) {
 148                         rdev->scratch.free[i] = true;
 149                         return;
 150                 }
 151         }
 152 }
 153
 154 void radeon_wb_disable(struct radeon_device *rdev)
 155 {
 156         int r;
 157
 158         if (rdev->wb.wb_obj) {
 159                 r = radeon_bo_reserve(rdev->wb.wb_obj, false);
 160                 if (unlikely(r != 0))
 161                         return;
 162                 radeon_bo_kunmap(rdev->wb.wb_obj);
 163                 radeon_bo_unpin(rdev->wb.wb_obj);
 164                 radeon_bo_unreserve(rdev->wb.wb_obj);
 165         }
 166         rdev->wb.enabled = false;
 167 }
 168
 169 void radeon_wb_fini(struct radeon_device *rdev)
 170 {
 171         radeon_wb_disable(rdev);
 172         if (rdev->wb.wb_obj) {
 173                 radeon_bo_unref(&rdev->wb.wb_obj);
 174                 rdev->wb.wb = NULL;
 175                 rdev->wb.wb_obj = NULL;
 176         }
 177 }
 178
 179 int radeon_wb_init(struct radeon_device *rdev)
 180 {
 181         int r;
 182
 183         if (rdev->wb.wb_obj == NULL) {
 184                 r = radeon_bo_create(rdev, NULL, RADEON_GPU_PAGE_SIZE, PAGE_SIZE, true,
 185                                 RADEON_GEM_DOMAIN_GTT, &rdev->wb.wb_obj);
 186                 if (r) {
 187                         dev_warn(rdev->dev, "(%d) create WB bo failed\n", r);
 188                         return r;
 189                 }
 190         }
 191         r = radeon_bo_reserve(rdev->wb.wb_obj, false);
 192         if (unlikely(r != 0)) {
 193                 radeon_wb_fini(rdev);
 194                 return r;
 195         }
 196         r = radeon_bo_pin(rdev->wb.wb_obj, RADEON_GEM_DOMAIN_GTT,
 197                           &rdev->wb.gpu_addr);
 198         if (r) {
 199                 radeon_bo_unreserve(rdev->wb.wb_obj);
 200                 dev_warn(rdev->dev, "(%d) pin WB bo failed\n", r);
 201                 radeon_wb_fini(rdev);
 202                 return r;
 203         }
 204         r = radeon_bo_kmap(rdev->wb.wb_obj, (void **)&rdev->wb.wb);
 205         radeon_bo_unreserve(rdev->wb.wb_obj);
 206         if (r) {
 207                 dev_warn(rdev->dev, "(%d) map WB bo failed\n", r);
 208                 radeon_wb_fini(rdev);
 209                 return r;
 210         }
 211
 212         /* disable event_write fences */
 213         rdev->wb.use_event = false;
 214         /* disabled via module param */
 215         if (radeon_no_wb == 1)
 216                 rdev->wb.enabled = false;
 217         else {
 218                 /* often unreliable on AGP */
 219                 if (rdev->flags & RADEON_IS_AGP) {
 220                         rdev->wb.enabled = false;
 221                 } else {
 222                         rdev->wb.enabled = true;
 223                         /* event_write fences are only available on r600+ */
 224                         if (rdev->family >= CHIP_R600)
 225                                 rdev->wb.use_event = true;
 226                 }
 227         }
 228
 229         dev_info(rdev->dev, "WB %sabled\n", rdev->wb.enabled ? "en" : "dis");
 230
 231         return 0;
 232 }
 233
 234 /**
 235  * radeon_vram_location - try to find VRAM location
 236  * @rdev: radeon device structure holding all necessary informations
 237  * @mc: memory controller structure holding memory informations
 238  * @base: base address at which to put VRAM
 239  *
 240  * Function will place try to place VRAM at base address provided
 241  * as parameter (which is so far either PCI aperture address or
 242  * for IGP TOM base address).
 243  *
 244  * If there is not enough space to fit the unvisible VRAM in the 32bits
 245  * address space then we limit the VRAM size to the aperture.
 246  *
 247  * If we are using AGP and if the AGP aperture doesn't allow us to have
 248  * room for all the VRAM than we restrict the VRAM to the PCI aperture
 249  * size and print a warning.
 250  *
 251  * This function will never fails, worst case are limiting VRAM.
 252  *
 253  * Note: GTT start, end, size should be initialized before calling this
 254  * function on AGP platform.
 255  *
 256  * Note: We don't explictly enforce VRAM start to be aligned on VRAM size,
 257  * this shouldn't be a problem as we are using the PCI aperture as a reference.
 258  * Otherwise this would be needed for rv280, all r3xx, and all r4xx, but
 259  * not IGP.
 260  *
 261  * Note: we use mc_vram_size as on some board we need to program the mc to
 262  * cover the whole aperture even if VRAM size is inferior to aperture size
 263  * Novell bug 204882 + along with lots of ubuntu ones
 264  *
 265  * Note: when limiting vram it's safe to overwritte real_vram_size because
 266  * we are not in case where real_vram_size is inferior to mc_vram_size (ie
 267  * note afected by bogus hw of Novell bug 204882 + along with lots of ubuntu
 268  * ones)
 269  *
 270  * Note: IGP TOM addr should be the same as the aperture addr, we don't
 271  * explicitly check for that thought.
 272  *
 273  * FIXME: when reducing VRAM size align new size on power of 2.
 274  */
 275 void radeon_vram_location(struct radeon_device *rdev, struct radeon_mc *mc, u64 base)
 276 {
 277         mc->vram_start = base;
 278         if (mc->mc_vram_size > (0xFFFFFFFF - base + 1)) {
 279                 dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
 280                 mc->real_vram_size = mc->aper_size;
 281                 mc->mc_vram_size = mc->aper_size;
 282         }
 283         mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
 284         if (rdev->flags & RADEON_IS_AGP && mc->vram_end > mc->gtt_start && mc->vram_start <= mc->gtt_end) {
 285                 dev_warn(rdev->dev, "limiting VRAM to PCI aperture size\n");
 286                 mc->real_vram_size = mc->aper_size;
 287                 mc->mc_vram_size = mc->aper_size;
 288         }
 289         mc->vram_end = mc->vram_start + mc->mc_vram_size - 1;
 290         dev_info(rdev->dev, "VRAM: %lluM 0x%016llX - 0x%016llX (%lluM used)\n",
 291                         mc->mc_vram_size >> 20, mc->vram_start,
 292                         mc->vram_end, mc->real_vram_size >> 20);
 293 }
 294
 295 /**
 296  * radeon_gtt_location - try to find GTT location
 297  * @rdev: radeon device structure holding all necessary informations
 298  * @mc: memory controller structure holding memory informations
 299  *
 300  * Function will place try to place GTT before or after VRAM.
 301  *
 302  * If GTT size is bigger than space left then we ajust GTT size.
 303  * Thus function will never fails.
 304  *
 305  * FIXME: when reducing GTT size align new size on power of 2.
 306  */
 307 void radeon_gtt_location(struct radeon_device *rdev, struct radeon_mc *mc)
 308 {
 309         u64 size_af, size_bf;
 310
 311         size_af = ((0xFFFFFFFF - mc->vram_end) + mc->gtt_base_align) & ~mc->gtt_base_align;
 312         size_bf = mc->vram_start & ~mc->gtt_base_align;
 313         if (size_bf > size_af) {
 314                 if (mc->gtt_size > size_bf) {
 315                         dev_warn(rdev->dev, "limiting GTT\n");
 316                         mc->gtt_size = size_bf;
 317                 }
 318                 mc->gtt_start = (mc->vram_start & ~mc->gtt_base_align) - mc->gtt_size;
 319         } else {
 320                 if (mc->gtt_size > size_af) {
 321                         dev_warn(rdev->dev, "limiting GTT\n");
 322                         mc->gtt_size = size_af;
 323                 }
 324                 mc->gtt_start = (mc->vram_end + 1 + mc->gtt_base_align) & ~mc->gtt_base_align;
 325         }
 326         mc->gtt_end = mc->gtt_start + mc->gtt_size - 1;
 327         dev_info(rdev->dev, "GTT: %lluM 0x%016llX - 0x%016llX\n",
 328                         mc->gtt_size >> 20, mc->gtt_start, mc->gtt_end);
 329 }
 330
 331 /*
 332  * GPU helpers function.
 333  */
 334 bool radeon_card_posted(struct radeon_device *rdev)
 335 {
 336         uint32_t reg;
 337
 338         /* first check CRTCs */
 339         if (ASIC_IS_DCE41(rdev)) {
 340                 reg = RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET) |
 341                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET);
 342                 if (reg & EVERGREEN_CRTC_MASTER_EN)
 343                         return true;
 344         } else if (ASIC_IS_DCE4(rdev)) {
 345                 reg = RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC0_REGISTER_OFFSET) |
 346                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC1_REGISTER_OFFSET) |
 347                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC2_REGISTER_OFFSET) |
 348                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC3_REGISTER_OFFSET) |
 349                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC4_REGISTER_OFFSET) |
 350                         RREG32(EVERGREEN_CRTC_CONTROL + EVERGREEN_CRTC5_REGISTER_OFFSET);
 351                 if (reg & EVERGREEN_CRTC_MASTER_EN)
 352                         return true;
 353         } else if (ASIC_IS_AVIVO(rdev)) {
 354                 reg = RREG32(AVIVO_D1CRTC_CONTROL) |
 355                       RREG32(AVIVO_D2CRTC_CONTROL);
 356                 if (reg & AVIVO_CRTC_EN) {
 357                         return true;
 358                 }
 359         } else {
 360                 reg = RREG32(RADEON_CRTC_GEN_CNTL) |
 361                       RREG32(RADEON_CRTC2_GEN_CNTL);
 362                 if (reg & RADEON_CRTC_EN) {
 363                         return true;
 364                 }
 365         }
 366
 367         /* then check MEM_SIZE, in case the crtcs are off */
 368         if (rdev->family >= CHIP_R600)
 369                 reg = RREG32(R600_CONFIG_MEMSIZE);
 370         else
 371                 reg = RREG32(RADEON_CONFIG_MEMSIZE);
 372
 373         if (reg)
 374                 return true;
 375
 376         return false;
 377
 378 }
 379
 380 void radeon_update_bandwidth_info(struct radeon_device *rdev)
 381 {
 382         fixed20_12 a;
 383         u32 sclk = rdev->pm.current_sclk;
 384         u32 mclk = rdev->pm.current_mclk;
 385
 386         /* sclk/mclk in Mhz */
 387         a.full = dfixed_const(100);
 388         rdev->pm.sclk.full = dfixed_const(sclk);
 389         rdev->pm.sclk.full = dfixed_div(rdev->pm.sclk, a);
 390         rdev->pm.mclk.full = dfixed_const(mclk);
 391         rdev->pm.mclk.full = dfixed_div(rdev->pm.mclk, a);
 392
 393         if (rdev->flags & RADEON_IS_IGP) {
 394                 a.full = dfixed_const(16);
 395                 /* core_bandwidth = sclk(Mhz) * 16 */
 396                 rdev->pm.core_bandwidth.full = dfixed_div(rdev->pm.sclk, a);
 397         }
 398 }
 399
 400 bool radeon_boot_test_post_card(struct radeon_device *rdev)
 401 {
 402         if (radeon_card_posted(rdev))
 403                 return true;
 404
 405         if (rdev->bios) {
 406                 DRM_INFO("GPU not posted. posting now...\n");
 407                 if (rdev->is_atom_bios)
 408                         atom_asic_init(rdev->mode_info.atom_context);
 409                 else
 410                         radeon_combios_asic_init(rdev->ddev);
 411                 return true;
 412         } else {
 413                 dev_err(rdev->dev, "Card not posted and no BIOS - ignoring\n");
 414                 return false;
 415         }
 416 }
 417
 418 int radeon_dummy_page_init(struct radeon_device *rdev)
 419 {
 420         if (rdev->dummy_page.page)
 421                 return 0;
 422         rdev->dummy_page.page = alloc_page(GFP_DMA32 | GFP_KERNEL | __GFP_ZERO);
 423         if (rdev->dummy_page.page == NULL)
 424                 return -ENOMEM;
 425         rdev->dummy_page.addr = pci_map_page(rdev->pdev, rdev->dummy_page.page,
 426                                         0, PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 427         if (pci_dma_mapping_error(rdev->pdev, rdev->dummy_page.addr)) {
 428                 dev_err(&rdev->pdev->dev, "Failed to DMA MAP the dummy page\n");
 429                 __free_page(rdev->dummy_page.page);
 430                 rdev->dummy_page.page = NULL;
 431                 return -ENOMEM;
 432         }
 433         return 0;
 434 }
 435
 436 void radeon_dummy_page_fini(struct radeon_device *rdev)
 437 {
 438         if (rdev->dummy_page.page == NULL)
 439                 return;
 440         pci_unmap_page(rdev->pdev, rdev->dummy_page.addr,
 441                         PAGE_SIZE, PCI_DMA_BIDIRECTIONAL);
 442         __free_page(rdev->dummy_page.page);
 443         rdev->dummy_page.page = NULL;
 444 }
 445
 446
 447 /* ATOM accessor methods */
 448 static uint32_t cail_pll_read(struct card_info *info, uint32_t reg)
 449 {
 450         struct radeon_device *rdev = info->dev->dev_private;
 451         uint32_t r;
 452
 453         r = rdev->pll_rreg(rdev, reg);
 454         return r;
 455 }
 456
 457 static void cail_pll_write(struct card_info *info, uint32_t reg, uint32_t val)
 458 {
 459         struct radeon_device *rdev = info->dev->dev_private;
 460
 461         rdev->pll_wreg(rdev, reg, val);
 462 }
 463
 464 static uint32_t cail_mc_read(struct card_info *info, uint32_t reg)
 465 {
 466         struct radeon_device *rdev = info->dev->dev_private;
 467         uint32_t r;
 468
 469         r = rdev->mc_rreg(rdev, reg);
 470         return r;
 471 }
 472
 473 static void cail_mc_write(struct card_info *info, uint32_t reg, uint32_t val)
 474 {
 475         struct radeon_device *rdev = info->dev->dev_private;
 476
 477         rdev->mc_wreg(rdev, reg, val);
 478 }
 479
 480 static void cail_reg_write(struct card_info *info, uint32_t reg, uint32_t val)
 481 {
 482         struct radeon_device *rdev = info->dev->dev_private;
 483
 484         WREG32(reg*4, val);
 485 }
 486
 487 static uint32_t cail_reg_read(struct card_info *info, uint32_t reg)
 488 {
 489         struct radeon_device *rdev = info->dev->dev_private;
 490         uint32_t r;
 491
 492         r = RREG32(reg*4);
 493         return r;
 494 }
 495
 496 static void cail_ioreg_write(struct card_info *info, uint32_t reg, uint32_t val)
 497 {
 498         struct radeon_device *rdev = info->dev->dev_private;
 499
 500         WREG32_IO(reg*4, val);
 501 }
 502
 503 static uint32_t cail_ioreg_read(struct card_info *info, uint32_t reg)
 504 {
 505         struct radeon_device *rdev = info->dev->dev_private;
 506         uint32_t r;
 507
 508         r = RREG32_IO(reg*4);
 509         return r;
 510 }
 511
 512 int radeon_atombios_init(struct radeon_device *rdev)
 513 {
 514         struct card_info *atom_card_info =
 515             kzalloc(sizeof(struct card_info), GFP_KERNEL);
 516
 517         if (!atom_card_info)
 518                 return -ENOMEM;
 519
 520         rdev->mode_info.atom_card_info = atom_card_info;
 521         atom_card_info->dev = rdev->ddev;
 522         atom_card_info->reg_read = cail_reg_read;
 523         atom_card_info->reg_write = cail_reg_write;
 524         /* needed for iio ops */
 525         if (rdev->rio_mem) {
 526                 atom_card_info->ioreg_read = cail_ioreg_read;
 527                 atom_card_info->ioreg_write = cail_ioreg_write;
 528         } else {
 529                 DRM_ERROR("Unable to find PCI I/O BAR; using MMIO for ATOM IIO\n");
 530                 atom_card_info->ioreg_read = cail_reg_read;
 531                 atom_card_info->ioreg_write = cail_reg_write;
 532         }
 533         atom_card_info->mc_read = cail_mc_read;
 534         atom_card_info->mc_write = cail_mc_write;
 535         atom_card_info->pll_read = cail_pll_read;
 536         atom_card_info->pll_write = cail_pll_write;
 537
 538         rdev->mode_info.atom_context = atom_parse(atom_card_info, rdev->bios);
 539         mutex_init(&rdev->mode_info.atom_context->mutex);
 540         radeon_atom_initialize_bios_scratch_regs(rdev->ddev);
 541         atom_allocate_fb_scratch(rdev->mode_info.atom_context);
 542         return 0;
 543 }
 544
 545 void radeon_atombios_fini(struct radeon_device *rdev)
 546 {
 547         if (rdev->mode_info.atom_context) {
 548                 kfree(rdev->mode_info.atom_context->scratch);
 549                 kfree(rdev->mode_info.atom_context);
 550         }
 551         kfree(rdev->mode_info.atom_card_info);
 552 }
 553
 554 int radeon_combios_init(struct radeon_device *rdev)
 555 {
 556         radeon_combios_initialize_bios_scratch_regs(rdev->ddev);
 557         return 0;
 558 }
 559
 560 void radeon_combios_fini(struct radeon_device *rdev)
 561 {
 562 }
 563
 564 /* if we get transitioned to only one device, tak VGA back */
 565 static unsigned int radeon_vga_set_decode(void *cookie, bool state)
 566 {
 567         struct radeon_device *rdev = cookie;
 568         radeon_vga_set_state(rdev, state);
 569         if (state)
 570                 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM |
 571                        VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 572         else
 573                 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM;
 574 }
 575
 576 void radeon_check_arguments(struct radeon_device *rdev)
 577 {
 578         /* vramlimit must be a power of two */
 579         switch (radeon_vram_limit) {
 580         case 0:
 581         case 4:
 582         case 8:
 583         case 16:
 584         case 32:
 585         case 64:
 586         case 128:
 587         case 256:
 588         case 512:
 589         case 1024:
 590         case 2048:
 591         case 4096:
 592                 break;
 593         default:
 594                 dev_warn(rdev->dev, "vram limit (%d) must be a power of 2\n",
 595                                 radeon_vram_limit);
 596                 radeon_vram_limit = 0;
 597                 break;
 598         }
 599         radeon_vram_limit = radeon_vram_limit << 20;
 600         /* gtt size must be power of two and greater or equal to 32M */
 601         switch (radeon_gart_size) {
 602         case 4:
 603         case 8:
 604         case 16:
 605                 dev_warn(rdev->dev, "gart size (%d) too small forcing to 512M\n",
 606                                 radeon_gart_size);
 607                 radeon_gart_size = 512;
 608                 break;
 609         case 32:
 610         case 64:
 611         case 128:
 612         case 256:
 613         case 512:
 614         case 1024:
 615         case 2048:
 616         case 4096:
 617                 break;
 618         default:
 619                 dev_warn(rdev->dev, "gart size (%d) must be a power of 2\n",
 620                                 radeon_gart_size);
 621                 radeon_gart_size = 512;
 622                 break;
 623         }
 624         rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
 625         /* AGP mode can only be -1, 1, 2, 4, 8 */
 626         switch (radeon_agpmode) {
 627         case -1:
 628         case 0:
 629         case 1:
 630         case 2:
 631         case 4:
 632         case 8:
 633                 break;
 634         default:
 635                 dev_warn(rdev->dev, "invalid AGP mode %d (valid mode: "
 636                                 "-1, 0, 1, 2, 4, 8)\n", radeon_agpmode);
 637                 radeon_agpmode = 0;
 638                 break;
 639         }
 640 }
 641
 642 static void radeon_switcheroo_set_state(struct pci_dev *pdev, enum vga_switcheroo_state state)
 643 {
 644         struct drm_device *dev = pci_get_drvdata(pdev);
 645         struct radeon_device *rdev = dev->dev_private;
 646         pm_message_t pmm = { .event = PM_EVENT_SUSPEND };
 647         if (state == VGA_SWITCHEROO_ON) {
 648                 printk(KERN_INFO "radeon: switched on\n");
 649                 /* don't suspend or resume card normally */
 650                 rdev->powered_down = false;
 651                 radeon_resume_kms(dev);
 652                 drm_kms_helper_poll_enable(dev);
 653         } else {
 654                 printk(KERN_INFO "radeon: switched off\n");
 655                 drm_kms_helper_poll_disable(dev);
 656                 radeon_suspend_kms(dev, pmm);
 657                 /* don't suspend or resume card normally */
 658                 rdev->powered_down = true;
 659         }
 660 }
 661
 662 static bool radeon_switcheroo_can_switch(struct pci_dev *pdev)
 663 {
 664         struct drm_device *dev = pci_get_drvdata(pdev);
 665         bool can_switch;
 666
 667         spin_lock(&dev->count_lock);
 668         can_switch = (dev->open_count == 0);
 669         spin_unlock(&dev->count_lock);
 670         return can_switch;
 671 }
 672
 673
 674 int radeon_device_init(struct radeon_device *rdev,
 675                        struct drm_device *ddev,
 676                        struct pci_dev *pdev,
 677                        uint32_t flags)
 678 {
 679         int r, i;
 680         int dma_bits;
 681
 682         rdev->shutdown = false;
 683         rdev->dev = &pdev->dev;
 684         rdev->ddev = ddev;
 685         rdev->pdev = pdev;
 686         rdev->flags = flags;
 687         rdev->family = flags & RADEON_FAMILY_MASK;
 688         rdev->is_atom_bios = false;
 689         rdev->usec_timeout = RADEON_MAX_USEC_TIMEOUT;
 690         rdev->mc.gtt_size = radeon_gart_size * 1024 * 1024;
 691         rdev->gpu_lockup = false;
 692         rdev->accel_working = false;
 693
 694         DRM_INFO("initializing kernel modesetting (%s 0x%04X:0x%04X).\n",
 695                 radeon_family_name[rdev->family], pdev->vendor, pdev->device);
 696
 697         /* mutex initialization are all done here so we
 698          * can recall function without having locking issues */
 699         mutex_init(&rdev->cs_mutex);
 700         mutex_init(&rdev->ib_pool.mutex);
 701         mutex_init(&rdev->cp.mutex);
 702         mutex_init(&rdev->dc_hw_i2c_mutex);
 703         if (rdev->family >= CHIP_R600)
 704                 spin_lock_init(&rdev->ih.lock);
 705         mutex_init(&rdev->gem.mutex);
 706         mutex_init(&rdev->pm.mutex);
 707         mutex_init(&rdev->vram_mutex);
 708         rwlock_init(&rdev->fence_drv.lock);
 709         INIT_LIST_HEAD(&rdev->gem.objects);
 710         init_waitqueue_head(&rdev->irq.vblank_queue);
 711         init_waitqueue_head(&rdev->irq.idle_queue);
 712
 713         /* setup workqueue */
 714         rdev->wq = create_workqueue("radeon");
 715         if (rdev->wq == NULL)
 716                 return -ENOMEM;
 717
 718         /* Set asic functions */
 719         r = radeon_asic_init(rdev);
 720         if (r)
 721                 return r;
 722         radeon_check_arguments(rdev);
 723
 724         /* all of the newer IGP chips have an internal gart
 725          * However some rs4xx report as AGP, so remove that here.
 726          */
 727         if ((rdev->family >= CHIP_RS400) &&
 728             (rdev->flags & RADEON_IS_IGP)) {
 729                 rdev->flags &= ~RADEON_IS_AGP;
 730         }
 731
 732         if (rdev->flags & RADEON_IS_AGP && radeon_agpmode == -1) {
 733                 radeon_agp_disable(rdev);
 734         }
 735
 736         /* set DMA mask + need_dma32 flags.
 737          * PCIE - can handle 40-bits.
 738          * IGP - can handle 40-bits (in theory)
 739          * AGP - generally dma32 is safest
 740          * PCI - only dma32
 741          */
 742         rdev->need_dma32 = false;
 743         if (rdev->flags & RADEON_IS_AGP)
 744                 rdev->need_dma32 = true;
 745         if (rdev->flags & RADEON_IS_PCI)
 746                 rdev->need_dma32 = true;
 747
 748         dma_bits = rdev->need_dma32 ? 32 : 40;
 749         r = pci_set_dma_mask(rdev->pdev, DMA_BIT_MASK(dma_bits));
 750         if (r) {
 751                 printk(KERN_WARNING "radeon: No suitable DMA available.\n");
 752         }
 753
 754         /* Registers mapping */
 755         /* TODO: block userspace mapping of io register */
 756         rdev->rmmio_base = pci_resource_start(rdev->pdev, 2);
 757         rdev->rmmio_size = pci_resource_len(rdev->pdev, 2);
 758         rdev->rmmio = ioremap(rdev->rmmio_base, rdev->rmmio_size);
 759         if (rdev->rmmio == NULL) {
 760                 return -ENOMEM;
 761         }
 762         DRM_INFO("register mmio base: 0x%08X\n", (uint32_t)rdev->rmmio_base);
 763         DRM_INFO("register mmio size: %u\n", (unsigned)rdev->rmmio_size);
 764
 765         /* io port mapping */
 766         for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 767                 if (pci_resource_flags(rdev->pdev, i) & IORESOURCE_IO) {
 768                         rdev->rio_mem_size = pci_resource_len(rdev->pdev, i);
 769                         rdev->rio_mem = pci_iomap(rdev->pdev, i, rdev->rio_mem_size);
 770                         break;
 771                 }
 772         }
 773         if (rdev->rio_mem == NULL)
 774                 DRM_ERROR("Unable to find PCI I/O BAR\n");
 775
 776         /* if we have > 1 VGA cards, then disable the radeon VGA resources */
 777         /* this will fail for cards that aren't VGA class devices, just
 778          * ignore it */
 779         vga_client_register(rdev->pdev, rdev, NULL, radeon_vga_set_decode);
 780         vga_switcheroo_register_client(rdev->pdev,
 781                                        radeon_switcheroo_set_state,
 782                                        radeon_switcheroo_can_switch);
 783
 784         r = radeon_init(rdev);
 785         if (r)
 786                 return r;
 787
 788         if (rdev->flags & RADEON_IS_AGP && !rdev->accel_working) {
 789                 /* Acceleration not working on AGP card try again
 790                  * with fallback to PCI or PCIE GART
 791                  */
 792                 radeon_asic_reset(rdev);
 793                 radeon_fini(rdev);
 794                 radeon_agp_disable(rdev);
 795                 r = radeon_init(rdev);
 796                 if (r)
 797                         return r;
 798         }
 799         if (radeon_testing) {
 800                 radeon_test_moves(rdev);
 801         }
 802         if (radeon_benchmarking) {
 803                 radeon_benchmark(rdev);
 804         }
 805         return 0;
 806 }
 807
 808 void radeon_device_fini(struct radeon_device *rdev)
 809 {
 810         DRM_INFO("radeon: finishing device.\n");
 811         rdev->shutdown = true;
 812         /* evict vram memory */
 813         radeon_bo_evict_vram(rdev);
 814         radeon_fini(rdev);
 815         destroy_workqueue(rdev->wq);
 816         vga_switcheroo_unregister_client(rdev->pdev);
 817         vga_client_register(rdev->pdev, NULL, NULL, NULL);
 818         if (rdev->rio_mem)
 819                 pci_iounmap(rdev->pdev, rdev->rio_mem);
 820         rdev->rio_mem = NULL;
 821         iounmap(rdev->rmmio);
 822         rdev->rmmio = NULL;
 823 }
 824
 825
 826 /*
 827  * Suspend & resume.
 828  */
 829 int radeon_suspend_kms(struct drm_device *dev, pm_message_t state)
 830 {
 831         struct radeon_device *rdev;
 832         struct drm_crtc *crtc;
 833         struct drm_connector *connector;
 834         int r;
 835
 836         if (dev == NULL || dev->dev_private == NULL) {
 837                 return -ENODEV;
 838         }
 839         if (state.event == PM_EVENT_PRETHAW) {
 840                 return 0;
 841         }
 842         rdev = dev->dev_private;
 843
 844         if (rdev->powered_down)
 845                 return 0;
 846
 847         /* turn off display hw */
 848         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 849                 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 850         }
 851
 852         /* unpin the front buffers */
 853         list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 854                 struct radeon_framebuffer *rfb = to_radeon_framebuffer(crtc->fb);
 855                 struct radeon_bo *robj;
 856
 857                 if (rfb == NULL || rfb->obj == NULL) {
 858                         continue;
 859                 }
 860                 robj = rfb->obj->driver_private;
 861                 /* don't unpin kernel fb objects */
 862                 if (!radeon_fbdev_robj_is_fb(rdev, robj)) {
 863                         r = radeon_bo_reserve(robj, false);
 864                         if (r == 0) {
 865                                 radeon_bo_unpin(robj);
 866                                 radeon_bo_unreserve(robj);
 867                         }
 868                 }
 869         }
 870         /* evict vram memory */
 871         radeon_bo_evict_vram(rdev);
 872         /* wait for gpu to finish processing current batch */
 873         radeon_fence_wait_last(rdev);
 874
 875         radeon_save_bios_scratch_regs(rdev);
 876
 877         radeon_pm_suspend(rdev);
 878         radeon_suspend(rdev);
 879         radeon_hpd_fini(rdev);
 880         /* evict remaining vram memory */
 881         radeon_bo_evict_vram(rdev);
 882
 883         radeon_agp_suspend(rdev);
 884
 885         pci_save_state(dev->pdev);
 886         if (state.event == PM_EVENT_SUSPEND) {
 887                 /* Shut down the device */
 888                 pci_disable_device(dev->pdev);
 889                 pci_set_power_state(dev->pdev, PCI_D3hot);
 890         }
 891         acquire_console_sem();
 892         radeon_fbdev_set_suspend(rdev, 1);
 893         release_console_sem();
 894         return 0;
 895 }
 896
 897 int radeon_resume_kms(struct drm_device *dev)
 898 {
 899         struct drm_connector *connector;
 900         struct radeon_device *rdev = dev->dev_private;
 901
 902         if (rdev->powered_down)
 903                 return 0;
 904
 905         acquire_console_sem();
 906         pci_set_power_state(dev->pdev, PCI_D0);
 907         pci_restore_state(dev->pdev);
 908         if (pci_enable_device(dev->pdev)) {
 909                 release_console_sem();
 910                 return -1;
 911         }
 912         pci_set_master(dev->pdev);
 913         /* resume AGP if in use */
 914         radeon_agp_resume(rdev);
 915         radeon_resume(rdev);
 916         radeon_pm_resume(rdev);
 917         radeon_restore_bios_scratch_regs(rdev);
 918
 919         radeon_fbdev_set_suspend(rdev, 0);
 920         release_console_sem();
 921
 922         /* reset hpd state */
 923         radeon_hpd_init(rdev);
 924         /* blat the mode back in */
 925         drm_helper_resume_force_mode(dev);
 926         /* turn on display hw */
 927         list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 928                 drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
 929         }
 930         return 0;
 931 }
 932
 933 int radeon_gpu_reset(struct radeon_device *rdev)
 934 {
 935         int r;
 936
 937         radeon_save_bios_scratch_regs(rdev);
 938         radeon_suspend(rdev);
 939
 940         r = radeon_asic_reset(rdev);
 941         if (!r) {
 942                 dev_info(rdev->dev, "GPU reset succeed\n");
 943                 radeon_resume(rdev);
 944                 radeon_restore_bios_scratch_regs(rdev);
 945                 drm_helper_resume_force_mode(rdev->ddev);
 946                 return 0;
 947         }
 948         /* bad news, how to tell it to userspace ? */
 949         dev_info(rdev->dev, "GPU reset failed\n");
 950         return r;
 951 }
 952
 953
 954 /*
 955  * Debugfs
 956  */
 957 struct radeon_debugfs {
 958         struct drm_info_list    *files;
 959         unsigned                num_files;
 960 };
 961 static struct radeon_debugfs _radeon_debugfs[RADEON_DEBUGFS_MAX_NUM_FILES];
 962 static unsigned _radeon_debugfs_count = 0;
 963
 964 int radeon_debugfs_add_files(struct radeon_device *rdev,
 965                              struct drm_info_list *files,
 966                              unsigned nfiles)
 967 {
 968         unsigned i;
 969
 970         for (i = 0; i < _radeon_debugfs_count; i++) {
 971                 if (_radeon_debugfs[i].files == files) {
 972                         /* Already registered */
 973                         return 0;
 974                 }
 975         }
 976         if ((_radeon_debugfs_count + nfiles) > RADEON_DEBUGFS_MAX_NUM_FILES) {
 977                 DRM_ERROR("Reached maximum number of debugfs files.\n");
 978                 DRM_ERROR("Report so we increase RADEON_DEBUGFS_MAX_NUM_FILES.\n");
 979                 return -EINVAL;
 980         }
 981         _radeon_debugfs[_radeon_debugfs_count].files = files;
 982         _radeon_debugfs[_radeon_debugfs_count].num_files = nfiles;
 983         _radeon_debugfs_count++;
 984 #if defined(CONFIG_DEBUG_FS)
 985         drm_debugfs_create_files(files, nfiles,
 986                                  rdev->ddev->control->debugfs_root,
 987                                  rdev->ddev->control);
 988         drm_debugfs_create_files(files, nfiles,
 989                                  rdev->ddev->primary->debugfs_root,
 990                                  rdev->ddev->primary);
 991 #endif
 992         return 0;
 993 }
 994
 995 #if defined(CONFIG_DEBUG_FS)
 996 int radeon_debugfs_init(struct drm_minor *minor)
 997 {
 998         return 0;
 999 }
1000
1001 void radeon_debugfs_cleanup(struct drm_minor *minor)
1002 {
1003         unsigned i;
1004
1005         for (i = 0; i < _radeon_debugfs_count; i++) {
1006                 drm_debugfs_remove_files(_radeon_debugfs[i].files,
1007                                          _radeon_debugfs[i].num_files, minor);
1008         }
1009 }
1010 #endif