1 /* 2 * Copyright 2012 Red Hat 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 6 * "Software"), to deal in the Software without restriction, including 7 * without limitation the rights to use, copy, modify, merge, publish, 8 * distribute, sub license, and/or sell copies of the Software, and to 9 * permit persons to whom the Software is furnished to do so, subject to 10 * the following conditions: 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL 15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, 16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE 18 * USE OR OTHER DEALINGS IN THE SOFTWARE. 19 * 20 * The above copyright notice and this permission notice (including the 21 * next paragraph) shall be included in all copies or substantial portions 22 * of the Software. 23 * 24 */ 25 /* 26 * Authors: Dave Airlie <airlied@redhat.com> 27 */ 28 #include <drm/drmP.h> 29 #include "ast_drv.h" 30 31 32 #include <drm/drm_fb_helper.h> 33 #include <drm/drm_crtc_helper.h> 34 ast_set_index_reg_mask(struct ast_private * ast,uint32_t base,uint8_t index,uint8_t mask,uint8_t val)35 void ast_set_index_reg_mask(struct ast_private *ast, 36 uint32_t base, uint8_t index, 37 uint8_t mask, uint8_t val) 38 { 39 u8 tmp; 40 ast_io_write8(ast, base, index); 41 tmp = (ast_io_read8(ast, base + 1) & mask) | val; 42 ast_set_index_reg(ast, base, index, tmp); 43 } 44 ast_get_index_reg(struct ast_private * ast,uint32_t base,uint8_t index)45 uint8_t ast_get_index_reg(struct ast_private *ast, 46 uint32_t base, uint8_t index) 47 { 48 uint8_t ret; 49 ast_io_write8(ast, base, index); 50 ret = ast_io_read8(ast, base + 1); 51 return ret; 52 } 53 ast_get_index_reg_mask(struct ast_private * ast,uint32_t base,uint8_t index,uint8_t mask)54 uint8_t ast_get_index_reg_mask(struct ast_private *ast, 55 uint32_t base, uint8_t index, uint8_t mask) 56 { 57 uint8_t ret; 58 ast_io_write8(ast, base, index); 59 ret = ast_io_read8(ast, base + 1) & mask; 60 return ret; 61 } 62 ast_detect_config_mode(struct drm_device * dev,u32 * scu_rev)63 static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) 64 { 65 struct device_node *np = dev->pdev->dev.of_node; 66 struct ast_private *ast = dev->dev_private; 67 uint32_t data, jregd0, jregd1; 68 69 /* Defaults */ 70 ast->config_mode = ast_use_defaults; 71 *scu_rev = 0xffffffff; 72 73 /* Check if we have device-tree properties */ 74 if (np && !of_property_read_u32(np, "aspeed,scu-revision-id", 75 scu_rev)) { 76 /* We do, disable P2A access */ 77 ast->config_mode = ast_use_dt; 78 DRM_INFO("Using device-tree for configuration\n"); 79 return; 80 } 81 82 /* Not all families have a P2A bridge */ 83 if (dev->pdev->device != PCI_CHIP_AST2000) 84 return; 85 86 /* 87 * The BMC will set SCU 0x40 D[12] to 1 if the P2 bridge 88 * is disabled. We force using P2A if VGA only mode bit 89 * is set D[7] 90 */ 91 jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 92 jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 93 if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) { 94 /* Double check it's actually working */ 95 data = ast_read32(ast, 0xf004); 96 if (data != 0xFFFFFFFF) { 97 /* P2A works, grab silicon revision */ 98 ast->config_mode = ast_use_p2a; 99 100 DRM_INFO("Using P2A bridge for configuration\n"); 101 102 /* Read SCU7c (silicon revision register) */ 103 ast_write32(ast, 0xf004, 0x1e6e0000); 104 ast_write32(ast, 0xf000, 0x1); 105 *scu_rev = ast_read32(ast, 0x1207c); 106 return; 107 } 108 } 109 110 /* We have a P2A bridge but it's disabled */ 111 DRM_INFO("P2A bridge disabled, using default configuration\n"); 112 } 113 ast_detect_chip(struct drm_device * dev,bool * need_post)114 static int ast_detect_chip(struct drm_device *dev, bool *need_post) 115 { 116 struct ast_private *ast = dev->dev_private; 117 uint32_t jreg, scu_rev; 118 119 /* 120 * If VGA isn't enabled, we need to enable now or subsequent 121 * access to the scratch registers will fail. We also inform 122 * our caller that it needs to POST the chip 123 * (Assumption: VGA not enabled -> need to POST) 124 */ 125 if (!ast_is_vga_enabled(dev)) { 126 ast_enable_vga(dev); 127 DRM_INFO("VGA not enabled on entry, requesting chip POST\n"); 128 *need_post = true; 129 } else 130 *need_post = false; 131 132 133 /* Enable extended register access */ 134 ast_open_key(ast); 135 ast_enable_mmio(dev); 136 137 /* Find out whether P2A works or whether to use device-tree */ 138 ast_detect_config_mode(dev, &scu_rev); 139 140 /* Identify chipset */ 141 if (dev->pdev->device == PCI_CHIP_AST1180) { 142 ast->chip = AST1100; 143 DRM_INFO("AST 1180 detected\n"); 144 } else { 145 if (dev->pdev->revision >= 0x40) { 146 ast->chip = AST2500; 147 DRM_INFO("AST 2500 detected\n"); 148 } else if (dev->pdev->revision >= 0x30) { 149 ast->chip = AST2400; 150 DRM_INFO("AST 2400 detected\n"); 151 } else if (dev->pdev->revision >= 0x20) { 152 ast->chip = AST2300; 153 DRM_INFO("AST 2300 detected\n"); 154 } else if (dev->pdev->revision >= 0x10) { 155 switch (scu_rev & 0x0300) { 156 case 0x0200: 157 ast->chip = AST1100; 158 DRM_INFO("AST 1100 detected\n"); 159 break; 160 case 0x0100: 161 ast->chip = AST2200; 162 DRM_INFO("AST 2200 detected\n"); 163 break; 164 case 0x0000: 165 ast->chip = AST2150; 166 DRM_INFO("AST 2150 detected\n"); 167 break; 168 default: 169 ast->chip = AST2100; 170 DRM_INFO("AST 2100 detected\n"); 171 break; 172 } 173 ast->vga2_clone = false; 174 } else { 175 ast->chip = AST2000; 176 DRM_INFO("AST 2000 detected\n"); 177 } 178 } 179 180 /* Check if we support wide screen */ 181 switch (ast->chip) { 182 case AST1180: 183 ast->support_wide_screen = true; 184 break; 185 case AST2000: 186 ast->support_wide_screen = false; 187 break; 188 default: 189 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); 190 if (!(jreg & 0x80)) 191 ast->support_wide_screen = true; 192 else if (jreg & 0x01) 193 ast->support_wide_screen = true; 194 else { 195 ast->support_wide_screen = false; 196 if (ast->chip == AST2300 && 197 (scu_rev & 0x300) == 0x0) /* ast1300 */ 198 ast->support_wide_screen = true; 199 if (ast->chip == AST2400 && 200 (scu_rev & 0x300) == 0x100) /* ast1400 */ 201 ast->support_wide_screen = true; 202 if (ast->chip == AST2500 && 203 scu_rev == 0x100) /* ast2510 */ 204 ast->support_wide_screen = true; 205 } 206 break; 207 } 208 209 /* Check 3rd Tx option (digital output afaik) */ 210 ast->tx_chip_type = AST_TX_NONE; 211 212 /* 213 * VGACRA3 Enhanced Color Mode Register, check if DVO is already 214 * enabled, in that case, assume we have a SIL164 TMDS transmitter 215 * 216 * Don't make that assumption if we the chip wasn't enabled and 217 * is at power-on reset, otherwise we'll incorrectly "detect" a 218 * SIL164 when there is none. 219 */ 220 if (!*need_post) { 221 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xa3, 0xff); 222 if (jreg & 0x80) 223 ast->tx_chip_type = AST_TX_SIL164; 224 } 225 226 if ((ast->chip == AST2300) || (ast->chip == AST2400)) { 227 /* 228 * On AST2300 and 2400, look the configuration set by the SoC in 229 * the SOC scratch register #1 bits 11:8 (interestingly marked 230 * as "reserved" in the spec) 231 */ 232 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); 233 switch (jreg) { 234 case 0x04: 235 ast->tx_chip_type = AST_TX_SIL164; 236 break; 237 case 0x08: 238 ast->dp501_fw_addr = kzalloc(32*1024, GFP_KERNEL); 239 if (ast->dp501_fw_addr) { 240 /* backup firmware */ 241 if (ast_backup_fw(dev, ast->dp501_fw_addr, 32*1024)) { 242 kfree(ast->dp501_fw_addr); 243 ast->dp501_fw_addr = NULL; 244 } 245 } 246 /* fallthrough */ 247 case 0x0c: 248 ast->tx_chip_type = AST_TX_DP501; 249 } 250 } 251 252 /* Print stuff for diagnostic purposes */ 253 switch(ast->tx_chip_type) { 254 case AST_TX_SIL164: 255 DRM_INFO("Using Sil164 TMDS transmitter\n"); 256 break; 257 case AST_TX_DP501: 258 DRM_INFO("Using DP501 DisplayPort transmitter\n"); 259 break; 260 default: 261 DRM_INFO("Analog VGA only\n"); 262 } 263 return 0; 264 } 265 ast_get_dram_info(struct drm_device * dev)266 static int ast_get_dram_info(struct drm_device *dev) 267 { 268 struct device_node *np = dev->pdev->dev.of_node; 269 struct ast_private *ast = dev->dev_private; 270 uint32_t mcr_cfg, mcr_scu_mpll, mcr_scu_strap; 271 uint32_t denum, num, div, ref_pll, dsel; 272 273 switch (ast->config_mode) { 274 case ast_use_dt: 275 /* 276 * If some properties are missing, use reasonable 277 * defaults for AST2400 278 */ 279 if (of_property_read_u32(np, "aspeed,mcr-configuration", 280 &mcr_cfg)) 281 mcr_cfg = 0x00000577; 282 if (of_property_read_u32(np, "aspeed,mcr-scu-mpll", 283 &mcr_scu_mpll)) 284 mcr_scu_mpll = 0x000050C0; 285 if (of_property_read_u32(np, "aspeed,mcr-scu-strap", 286 &mcr_scu_strap)) 287 mcr_scu_strap = 0; 288 break; 289 case ast_use_p2a: 290 ast_write32(ast, 0xf004, 0x1e6e0000); 291 ast_write32(ast, 0xf000, 0x1); 292 mcr_cfg = ast_read32(ast, 0x10004); 293 mcr_scu_mpll = ast_read32(ast, 0x10120); 294 mcr_scu_strap = ast_read32(ast, 0x10170); 295 break; 296 case ast_use_defaults: 297 default: 298 ast->dram_bus_width = 16; 299 ast->dram_type = AST_DRAM_1Gx16; 300 if (ast->chip == AST2500) 301 ast->mclk = 800; 302 else 303 ast->mclk = 396; 304 return 0; 305 } 306 307 if (mcr_cfg & 0x40) 308 ast->dram_bus_width = 16; 309 else 310 ast->dram_bus_width = 32; 311 312 if (ast->chip == AST2500) { 313 switch (mcr_cfg & 0x03) { 314 case 0: 315 ast->dram_type = AST_DRAM_1Gx16; 316 break; 317 default: 318 case 1: 319 ast->dram_type = AST_DRAM_2Gx16; 320 break; 321 case 2: 322 ast->dram_type = AST_DRAM_4Gx16; 323 break; 324 case 3: 325 ast->dram_type = AST_DRAM_8Gx16; 326 break; 327 } 328 } else if (ast->chip == AST2300 || ast->chip == AST2400) { 329 switch (mcr_cfg & 0x03) { 330 case 0: 331 ast->dram_type = AST_DRAM_512Mx16; 332 break; 333 default: 334 case 1: 335 ast->dram_type = AST_DRAM_1Gx16; 336 break; 337 case 2: 338 ast->dram_type = AST_DRAM_2Gx16; 339 break; 340 case 3: 341 ast->dram_type = AST_DRAM_4Gx16; 342 break; 343 } 344 } else { 345 switch (mcr_cfg & 0x0c) { 346 case 0: 347 case 4: 348 ast->dram_type = AST_DRAM_512Mx16; 349 break; 350 case 8: 351 if (mcr_cfg & 0x40) 352 ast->dram_type = AST_DRAM_1Gx16; 353 else 354 ast->dram_type = AST_DRAM_512Mx32; 355 break; 356 case 0xc: 357 ast->dram_type = AST_DRAM_1Gx32; 358 break; 359 } 360 } 361 362 if (mcr_scu_strap & 0x2000) 363 ref_pll = 14318; 364 else 365 ref_pll = 12000; 366 367 denum = mcr_scu_mpll & 0x1f; 368 num = (mcr_scu_mpll & 0x3fe0) >> 5; 369 dsel = (mcr_scu_mpll & 0xc000) >> 14; 370 switch (dsel) { 371 case 3: 372 div = 0x4; 373 break; 374 case 2: 375 case 1: 376 div = 0x2; 377 break; 378 default: 379 div = 0x1; 380 break; 381 } 382 ast->mclk = ref_pll * (num + 2) / ((denum + 2) * (div * 1000)); 383 return 0; 384 } 385 ast_user_framebuffer_destroy(struct drm_framebuffer * fb)386 static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb) 387 { 388 struct ast_framebuffer *ast_fb = to_ast_framebuffer(fb); 389 390 drm_gem_object_put_unlocked(ast_fb->obj); 391 drm_framebuffer_cleanup(fb); 392 kfree(ast_fb); 393 } 394 395 static const struct drm_framebuffer_funcs ast_fb_funcs = { 396 .destroy = ast_user_framebuffer_destroy, 397 }; 398 399 ast_framebuffer_init(struct drm_device * dev,struct ast_framebuffer * ast_fb,const struct drm_mode_fb_cmd2 * mode_cmd,struct drm_gem_object * obj)400 int ast_framebuffer_init(struct drm_device *dev, 401 struct ast_framebuffer *ast_fb, 402 const struct drm_mode_fb_cmd2 *mode_cmd, 403 struct drm_gem_object *obj) 404 { 405 int ret; 406 407 drm_helper_mode_fill_fb_struct(dev, &ast_fb->base, mode_cmd); 408 ast_fb->obj = obj; 409 ret = drm_framebuffer_init(dev, &ast_fb->base, &ast_fb_funcs); 410 if (ret) { 411 DRM_ERROR("framebuffer init failed %d\n", ret); 412 return ret; 413 } 414 return 0; 415 } 416 417 static struct drm_framebuffer * ast_user_framebuffer_create(struct drm_device * dev,struct drm_file * filp,const struct drm_mode_fb_cmd2 * mode_cmd)418 ast_user_framebuffer_create(struct drm_device *dev, 419 struct drm_file *filp, 420 const struct drm_mode_fb_cmd2 *mode_cmd) 421 { 422 struct drm_gem_object *obj; 423 struct ast_framebuffer *ast_fb; 424 int ret; 425 426 obj = drm_gem_object_lookup(filp, mode_cmd->handles[0]); 427 if (obj == NULL) 428 return ERR_PTR(-ENOENT); 429 430 ast_fb = kzalloc(sizeof(*ast_fb), GFP_KERNEL); 431 if (!ast_fb) { 432 drm_gem_object_put_unlocked(obj); 433 return ERR_PTR(-ENOMEM); 434 } 435 436 ret = ast_framebuffer_init(dev, ast_fb, mode_cmd, obj); 437 if (ret) { 438 drm_gem_object_put_unlocked(obj); 439 kfree(ast_fb); 440 return ERR_PTR(ret); 441 } 442 return &ast_fb->base; 443 } 444 445 static const struct drm_mode_config_funcs ast_mode_funcs = { 446 .fb_create = ast_user_framebuffer_create, 447 }; 448 ast_get_vram_info(struct drm_device * dev)449 static u32 ast_get_vram_info(struct drm_device *dev) 450 { 451 struct ast_private *ast = dev->dev_private; 452 u8 jreg; 453 u32 vram_size; 454 ast_open_key(ast); 455 456 vram_size = AST_VIDMEM_DEFAULT_SIZE; 457 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xaa, 0xff); 458 switch (jreg & 3) { 459 case 0: vram_size = AST_VIDMEM_SIZE_8M; break; 460 case 1: vram_size = AST_VIDMEM_SIZE_16M; break; 461 case 2: vram_size = AST_VIDMEM_SIZE_32M; break; 462 case 3: vram_size = AST_VIDMEM_SIZE_64M; break; 463 } 464 465 jreg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0x99, 0xff); 466 switch (jreg & 0x03) { 467 case 1: 468 vram_size -= 0x100000; 469 break; 470 case 2: 471 vram_size -= 0x200000; 472 break; 473 case 3: 474 vram_size -= 0x400000; 475 break; 476 } 477 478 return vram_size; 479 } 480 ast_driver_load(struct drm_device * dev,unsigned long flags)481 int ast_driver_load(struct drm_device *dev, unsigned long flags) 482 { 483 struct ast_private *ast; 484 bool need_post; 485 int ret = 0; 486 487 ast = kzalloc(sizeof(struct ast_private), GFP_KERNEL); 488 if (!ast) 489 return -ENOMEM; 490 491 dev->dev_private = ast; 492 ast->dev = dev; 493 494 ast->regs = pci_iomap(dev->pdev, 1, 0); 495 if (!ast->regs) { 496 ret = -EIO; 497 goto out_free; 498 } 499 500 /* 501 * If we don't have IO space at all, use MMIO now and 502 * assume the chip has MMIO enabled by default (rev 0x20 503 * and higher). 504 */ 505 if (!(pci_resource_flags(dev->pdev, 2) & IORESOURCE_IO)) { 506 DRM_INFO("platform has no IO space, trying MMIO\n"); 507 ast->ioregs = ast->regs + AST_IO_MM_OFFSET; 508 } 509 510 /* "map" IO regs if the above hasn't done so already */ 511 if (!ast->ioregs) { 512 ast->ioregs = pci_iomap(dev->pdev, 2, 0); 513 if (!ast->ioregs) { 514 ret = -EIO; 515 goto out_free; 516 } 517 } 518 519 ast_detect_chip(dev, &need_post); 520 521 if (need_post) 522 ast_post_gpu(dev); 523 524 if (ast->chip != AST1180) { 525 ret = ast_get_dram_info(dev); 526 if (ret) 527 goto out_free; 528 ast->vram_size = ast_get_vram_info(dev); 529 DRM_INFO("dram MCLK=%u Mhz type=%d bus_width=%d size=%08x\n", 530 ast->mclk, ast->dram_type, 531 ast->dram_bus_width, ast->vram_size); 532 } 533 534 ret = ast_mm_init(ast); 535 if (ret) 536 goto out_free; 537 538 drm_mode_config_init(dev); 539 540 dev->mode_config.funcs = (void *)&ast_mode_funcs; 541 dev->mode_config.min_width = 0; 542 dev->mode_config.min_height = 0; 543 dev->mode_config.preferred_depth = 24; 544 dev->mode_config.prefer_shadow = 1; 545 dev->mode_config.fb_base = pci_resource_start(ast->dev->pdev, 0); 546 547 if (ast->chip == AST2100 || 548 ast->chip == AST2200 || 549 ast->chip == AST2300 || 550 ast->chip == AST2400 || 551 ast->chip == AST2500 || 552 ast->chip == AST1180) { 553 dev->mode_config.max_width = 1920; 554 dev->mode_config.max_height = 2048; 555 } else { 556 dev->mode_config.max_width = 1600; 557 dev->mode_config.max_height = 1200; 558 } 559 560 ret = ast_mode_init(dev); 561 if (ret) 562 goto out_free; 563 564 ret = ast_fbdev_init(dev); 565 if (ret) 566 goto out_free; 567 568 return 0; 569 out_free: 570 kfree(ast); 571 dev->dev_private = NULL; 572 return ret; 573 } 574 ast_driver_unload(struct drm_device * dev)575 void ast_driver_unload(struct drm_device *dev) 576 { 577 struct ast_private *ast = dev->dev_private; 578 579 /* enable standard VGA decode */ 580 ast_set_index_reg(ast, AST_IO_CRTC_PORT, 0xa1, 0x04); 581 582 ast_release_firmware(dev); 583 kfree(ast->dp501_fw_addr); 584 ast_mode_fini(dev); 585 ast_fbdev_fini(dev); 586 drm_mode_config_cleanup(dev); 587 588 ast_mm_fini(ast); 589 if (ast->ioregs != ast->regs + AST_IO_MM_OFFSET) 590 pci_iounmap(dev->pdev, ast->ioregs); 591 pci_iounmap(dev->pdev, ast->regs); 592 kfree(ast); 593 } 594 ast_gem_create(struct drm_device * dev,u32 size,bool iskernel,struct drm_gem_object ** obj)595 int ast_gem_create(struct drm_device *dev, 596 u32 size, bool iskernel, 597 struct drm_gem_object **obj) 598 { 599 struct ast_bo *astbo; 600 int ret; 601 602 *obj = NULL; 603 604 size = roundup(size, PAGE_SIZE); 605 if (size == 0) 606 return -EINVAL; 607 608 ret = ast_bo_create(dev, size, 0, 0, &astbo); 609 if (ret) { 610 if (ret != -ERESTARTSYS) 611 DRM_ERROR("failed to allocate GEM object\n"); 612 return ret; 613 } 614 *obj = &astbo->gem; 615 return 0; 616 } 617 ast_dumb_create(struct drm_file * file,struct drm_device * dev,struct drm_mode_create_dumb * args)618 int ast_dumb_create(struct drm_file *file, 619 struct drm_device *dev, 620 struct drm_mode_create_dumb *args) 621 { 622 int ret; 623 struct drm_gem_object *gobj; 624 u32 handle; 625 626 args->pitch = args->width * ((args->bpp + 7) / 8); 627 args->size = args->pitch * args->height; 628 629 ret = ast_gem_create(dev, args->size, false, 630 &gobj); 631 if (ret) 632 return ret; 633 634 ret = drm_gem_handle_create(file, gobj, &handle); 635 drm_gem_object_put_unlocked(gobj); 636 if (ret) 637 return ret; 638 639 args->handle = handle; 640 return 0; 641 } 642 ast_bo_unref(struct ast_bo ** bo)643 static void ast_bo_unref(struct ast_bo **bo) 644 { 645 struct ttm_buffer_object *tbo; 646 647 if ((*bo) == NULL) 648 return; 649 650 tbo = &((*bo)->bo); 651 ttm_bo_unref(&tbo); 652 *bo = NULL; 653 } 654 ast_gem_free_object(struct drm_gem_object * obj)655 void ast_gem_free_object(struct drm_gem_object *obj) 656 { 657 struct ast_bo *ast_bo = gem_to_ast_bo(obj); 658 659 ast_bo_unref(&ast_bo); 660 } 661 662 ast_bo_mmap_offset(struct ast_bo * bo)663 static inline u64 ast_bo_mmap_offset(struct ast_bo *bo) 664 { 665 return drm_vma_node_offset_addr(&bo->bo.vma_node); 666 } 667 int ast_dumb_mmap_offset(struct drm_file * file,struct drm_device * dev,uint32_t handle,uint64_t * offset)668 ast_dumb_mmap_offset(struct drm_file *file, 669 struct drm_device *dev, 670 uint32_t handle, 671 uint64_t *offset) 672 { 673 struct drm_gem_object *obj; 674 struct ast_bo *bo; 675 676 obj = drm_gem_object_lookup(file, handle); 677 if (obj == NULL) 678 return -ENOENT; 679 680 bo = gem_to_ast_bo(obj); 681 *offset = ast_bo_mmap_offset(bo); 682 683 drm_gem_object_put_unlocked(obj); 684 685 return 0; 686 687 } 688 689