i915_dma.c revision 29bd0ae25f8cb96b63560c2cbccec77b425e1603
1/* i915_dma.c -- DMA support for the I915 -*- linux-c -*- 2 */ 3/* 4 * Copyright 2003 Tungsten Graphics, Inc., Cedar Park, Texas. 5 * All Rights Reserved. 6 * 7 * Permission is hereby granted, free of charge, to any person obtaining a 8 * copy of this software and associated documentation files (the 9 * "Software"), to deal in the Software without restriction, including 10 * without limitation the rights to use, copy, modify, merge, publish, 11 * distribute, sub license, and/or sell copies of the Software, and to 12 * permit persons to whom the Software is furnished to do so, subject to 13 * the following conditions: 14 * 15 * The above copyright notice and this permission notice (including the 16 * next paragraph) shall be included in all copies or substantial portions 17 * of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. 22 * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR 23 * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 24 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE 25 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 26 * 27 */ 28 29#include "drmP.h" 30#include "drm.h" 31#include "drm_crtc_helper.h" 32#include "drm_fb_helper.h" 33#include "intel_drv.h" 34#include "i915_drm.h" 35#include "i915_drv.h" 36#include "i915_trace.h" 37#include <linux/vgaarb.h> 38 39/* Really want an OS-independent resettable timer. Would like to have 40 * this loop run for (eg) 3 sec, but have the timer reset every time 41 * the head pointer changes, so that EBUSY only happens if the ring 42 * actually stalls for (eg) 3 seconds. 43 */ 44int i915_wait_ring(struct drm_device * dev, int n, const char *caller) 45{ 46 drm_i915_private_t *dev_priv = dev->dev_private; 47 drm_i915_ring_buffer_t *ring = &(dev_priv->ring); 48 u32 acthd_reg = IS_I965G(dev) ? ACTHD_I965 : ACTHD; 49 u32 last_acthd = I915_READ(acthd_reg); 50 u32 acthd; 51 u32 last_head = I915_READ(PRB0_HEAD) & HEAD_ADDR; 52 int i; 53 54 trace_i915_ring_wait_begin (dev); 55 56 for (i = 0; i < 100000; i++) { 57 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR; 58 acthd = I915_READ(acthd_reg); 59 ring->space = ring->head - (ring->tail + 8); 60 if (ring->space < 0) 61 ring->space += ring->Size; 62 if (ring->space >= n) { 63 trace_i915_ring_wait_end (dev); 64 return 0; 65 } 66 67 if (dev->primary->master) { 68 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 69 if (master_priv->sarea_priv) 70 master_priv->sarea_priv->perf_boxes |= I915_BOX_WAIT; 71 } 72 73 74 if (ring->head != last_head) 75 i = 0; 76 if (acthd != last_acthd) 77 i = 0; 78 79 last_head = ring->head; 80 last_acthd = acthd; 81 msleep_interruptible(10); 82 83 } 84 85 trace_i915_ring_wait_end (dev); 86 return -EBUSY; 87} 88 89/* As a ringbuffer is only allowed to wrap between instructions, fill 90 * the tail with NOOPs. 91 */ 92int i915_wrap_ring(struct drm_device *dev) 93{ 94 drm_i915_private_t *dev_priv = dev->dev_private; 95 volatile unsigned int *virt; 96 int rem; 97 98 rem = dev_priv->ring.Size - dev_priv->ring.tail; 99 if (dev_priv->ring.space < rem) { 100 int ret = i915_wait_ring(dev, rem, __func__); 101 if (ret) 102 return ret; 103 } 104 dev_priv->ring.space -= rem; 105 106 virt = (unsigned int *) 107 (dev_priv->ring.virtual_start + dev_priv->ring.tail); 108 rem /= 4; 109 while (rem--) 110 *virt++ = MI_NOOP; 111 112 dev_priv->ring.tail = 0; 113 114 return 0; 115} 116 117/** 118 * Sets up the hardware status page for devices that need a physical address 119 * in the register. 120 */ 121static int i915_init_phys_hws(struct drm_device *dev) 122{ 123 drm_i915_private_t *dev_priv = dev->dev_private; 124 /* Program Hardware Status Page */ 125 dev_priv->status_page_dmah = 126 drm_pci_alloc(dev, PAGE_SIZE, PAGE_SIZE, 0xffffffff); 127 128 if (!dev_priv->status_page_dmah) { 129 DRM_ERROR("Can not allocate hardware status page\n"); 130 return -ENOMEM; 131 } 132 dev_priv->hw_status_page = dev_priv->status_page_dmah->vaddr; 133 dev_priv->dma_status_page = dev_priv->status_page_dmah->busaddr; 134 135 memset(dev_priv->hw_status_page, 0, PAGE_SIZE); 136 137 I915_WRITE(HWS_PGA, dev_priv->dma_status_page); 138 DRM_DEBUG_DRIVER("Enabled hardware status page\n"); 139 return 0; 140} 141 142/** 143 * Frees the hardware status page, whether it's a physical address or a virtual 144 * address set up by the X Server. 145 */ 146static void i915_free_hws(struct drm_device *dev) 147{ 148 drm_i915_private_t *dev_priv = dev->dev_private; 149 if (dev_priv->status_page_dmah) { 150 drm_pci_free(dev, dev_priv->status_page_dmah); 151 dev_priv->status_page_dmah = NULL; 152 } 153 154 if (dev_priv->status_gfx_addr) { 155 dev_priv->status_gfx_addr = 0; 156 drm_core_ioremapfree(&dev_priv->hws_map, dev); 157 } 158 159 /* Need to rewrite hardware status page */ 160 I915_WRITE(HWS_PGA, 0x1ffff000); 161} 162 163void i915_kernel_lost_context(struct drm_device * dev) 164{ 165 drm_i915_private_t *dev_priv = dev->dev_private; 166 struct drm_i915_master_private *master_priv; 167 drm_i915_ring_buffer_t *ring = &(dev_priv->ring); 168 169 /* 170 * We should never lose context on the ring with modesetting 171 * as we don't expose it to userspace 172 */ 173 if (drm_core_check_feature(dev, DRIVER_MODESET)) 174 return; 175 176 ring->head = I915_READ(PRB0_HEAD) & HEAD_ADDR; 177 ring->tail = I915_READ(PRB0_TAIL) & TAIL_ADDR; 178 ring->space = ring->head - (ring->tail + 8); 179 if (ring->space < 0) 180 ring->space += ring->Size; 181 182 if (!dev->primary->master) 183 return; 184 185 master_priv = dev->primary->master->driver_priv; 186 if (ring->head == ring->tail && master_priv->sarea_priv) 187 master_priv->sarea_priv->perf_boxes |= I915_BOX_RING_EMPTY; 188} 189 190static int i915_dma_cleanup(struct drm_device * dev) 191{ 192 drm_i915_private_t *dev_priv = dev->dev_private; 193 /* Make sure interrupts are disabled here because the uninstall ioctl 194 * may not have been called from userspace and after dev_private 195 * is freed, it's too late. 196 */ 197 if (dev->irq_enabled) 198 drm_irq_uninstall(dev); 199 200 if (dev_priv->ring.virtual_start) { 201 drm_core_ioremapfree(&dev_priv->ring.map, dev); 202 dev_priv->ring.virtual_start = NULL; 203 dev_priv->ring.map.handle = NULL; 204 dev_priv->ring.map.size = 0; 205 } 206 207 /* Clear the HWS virtual address at teardown */ 208 if (I915_NEED_GFX_HWS(dev)) 209 i915_free_hws(dev); 210 211 return 0; 212} 213 214static int i915_initialize(struct drm_device * dev, drm_i915_init_t * init) 215{ 216 drm_i915_private_t *dev_priv = dev->dev_private; 217 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 218 219 master_priv->sarea = drm_getsarea(dev); 220 if (master_priv->sarea) { 221 master_priv->sarea_priv = (drm_i915_sarea_t *) 222 ((u8 *)master_priv->sarea->handle + init->sarea_priv_offset); 223 } else { 224 DRM_DEBUG_DRIVER("sarea not found assuming DRI2 userspace\n"); 225 } 226 227 if (init->ring_size != 0) { 228 if (dev_priv->ring.ring_obj != NULL) { 229 i915_dma_cleanup(dev); 230 DRM_ERROR("Client tried to initialize ringbuffer in " 231 "GEM mode\n"); 232 return -EINVAL; 233 } 234 235 dev_priv->ring.Size = init->ring_size; 236 237 dev_priv->ring.map.offset = init->ring_start; 238 dev_priv->ring.map.size = init->ring_size; 239 dev_priv->ring.map.type = 0; 240 dev_priv->ring.map.flags = 0; 241 dev_priv->ring.map.mtrr = 0; 242 243 drm_core_ioremap_wc(&dev_priv->ring.map, dev); 244 245 if (dev_priv->ring.map.handle == NULL) { 246 i915_dma_cleanup(dev); 247 DRM_ERROR("can not ioremap virtual address for" 248 " ring buffer\n"); 249 return -ENOMEM; 250 } 251 } 252 253 dev_priv->ring.virtual_start = dev_priv->ring.map.handle; 254 255 dev_priv->cpp = init->cpp; 256 dev_priv->back_offset = init->back_offset; 257 dev_priv->front_offset = init->front_offset; 258 dev_priv->current_page = 0; 259 if (master_priv->sarea_priv) 260 master_priv->sarea_priv->pf_current_page = 0; 261 262 /* Allow hardware batchbuffers unless told otherwise. 263 */ 264 dev_priv->allow_batchbuffer = 1; 265 266 return 0; 267} 268 269static int i915_dma_resume(struct drm_device * dev) 270{ 271 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 272 273 DRM_DEBUG_DRIVER("%s\n", __func__); 274 275 if (dev_priv->ring.map.handle == NULL) { 276 DRM_ERROR("can not ioremap virtual address for" 277 " ring buffer\n"); 278 return -ENOMEM; 279 } 280 281 /* Program Hardware Status Page */ 282 if (!dev_priv->hw_status_page) { 283 DRM_ERROR("Can not find hardware status page\n"); 284 return -EINVAL; 285 } 286 DRM_DEBUG_DRIVER("hw status page @ %p\n", 287 dev_priv->hw_status_page); 288 289 if (dev_priv->status_gfx_addr != 0) 290 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); 291 else 292 I915_WRITE(HWS_PGA, dev_priv->dma_status_page); 293 DRM_DEBUG_DRIVER("Enabled hardware status page\n"); 294 295 return 0; 296} 297 298static int i915_dma_init(struct drm_device *dev, void *data, 299 struct drm_file *file_priv) 300{ 301 drm_i915_init_t *init = data; 302 int retcode = 0; 303 304 switch (init->func) { 305 case I915_INIT_DMA: 306 retcode = i915_initialize(dev, init); 307 break; 308 case I915_CLEANUP_DMA: 309 retcode = i915_dma_cleanup(dev); 310 break; 311 case I915_RESUME_DMA: 312 retcode = i915_dma_resume(dev); 313 break; 314 default: 315 retcode = -EINVAL; 316 break; 317 } 318 319 return retcode; 320} 321 322/* Implement basically the same security restrictions as hardware does 323 * for MI_BATCH_NON_SECURE. These can be made stricter at any time. 324 * 325 * Most of the calculations below involve calculating the size of a 326 * particular instruction. It's important to get the size right as 327 * that tells us where the next instruction to check is. Any illegal 328 * instruction detected will be given a size of zero, which is a 329 * signal to abort the rest of the buffer. 330 */ 331static int do_validate_cmd(int cmd) 332{ 333 switch (((cmd >> 29) & 0x7)) { 334 case 0x0: 335 switch ((cmd >> 23) & 0x3f) { 336 case 0x0: 337 return 1; /* MI_NOOP */ 338 case 0x4: 339 return 1; /* MI_FLUSH */ 340 default: 341 return 0; /* disallow everything else */ 342 } 343 break; 344 case 0x1: 345 return 0; /* reserved */ 346 case 0x2: 347 return (cmd & 0xff) + 2; /* 2d commands */ 348 case 0x3: 349 if (((cmd >> 24) & 0x1f) <= 0x18) 350 return 1; 351 352 switch ((cmd >> 24) & 0x1f) { 353 case 0x1c: 354 return 1; 355 case 0x1d: 356 switch ((cmd >> 16) & 0xff) { 357 case 0x3: 358 return (cmd & 0x1f) + 2; 359 case 0x4: 360 return (cmd & 0xf) + 2; 361 default: 362 return (cmd & 0xffff) + 2; 363 } 364 case 0x1e: 365 if (cmd & (1 << 23)) 366 return (cmd & 0xffff) + 1; 367 else 368 return 1; 369 case 0x1f: 370 if ((cmd & (1 << 23)) == 0) /* inline vertices */ 371 return (cmd & 0x1ffff) + 2; 372 else if (cmd & (1 << 17)) /* indirect random */ 373 if ((cmd & 0xffff) == 0) 374 return 0; /* unknown length, too hard */ 375 else 376 return (((cmd & 0xffff) + 1) / 2) + 1; 377 else 378 return 2; /* indirect sequential */ 379 default: 380 return 0; 381 } 382 default: 383 return 0; 384 } 385 386 return 0; 387} 388 389static int validate_cmd(int cmd) 390{ 391 int ret = do_validate_cmd(cmd); 392 393/* printk("validate_cmd( %x ): %d\n", cmd, ret); */ 394 395 return ret; 396} 397 398static int i915_emit_cmds(struct drm_device * dev, int *buffer, int dwords) 399{ 400 drm_i915_private_t *dev_priv = dev->dev_private; 401 int i; 402 RING_LOCALS; 403 404 if ((dwords+1) * sizeof(int) >= dev_priv->ring.Size - 8) 405 return -EINVAL; 406 407 BEGIN_LP_RING((dwords+1)&~1); 408 409 for (i = 0; i < dwords;) { 410 int cmd, sz; 411 412 cmd = buffer[i]; 413 414 if ((sz = validate_cmd(cmd)) == 0 || i + sz > dwords) 415 return -EINVAL; 416 417 OUT_RING(cmd); 418 419 while (++i, --sz) { 420 OUT_RING(buffer[i]); 421 } 422 } 423 424 if (dwords & 1) 425 OUT_RING(0); 426 427 ADVANCE_LP_RING(); 428 429 return 0; 430} 431 432int 433i915_emit_box(struct drm_device *dev, 434 struct drm_clip_rect *boxes, 435 int i, int DR1, int DR4) 436{ 437 drm_i915_private_t *dev_priv = dev->dev_private; 438 struct drm_clip_rect box = boxes[i]; 439 RING_LOCALS; 440 441 if (box.y2 <= box.y1 || box.x2 <= box.x1 || box.y2 <= 0 || box.x2 <= 0) { 442 DRM_ERROR("Bad box %d,%d..%d,%d\n", 443 box.x1, box.y1, box.x2, box.y2); 444 return -EINVAL; 445 } 446 447 if (IS_I965G(dev)) { 448 BEGIN_LP_RING(4); 449 OUT_RING(GFX_OP_DRAWRECT_INFO_I965); 450 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16)); 451 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16)); 452 OUT_RING(DR4); 453 ADVANCE_LP_RING(); 454 } else { 455 BEGIN_LP_RING(6); 456 OUT_RING(GFX_OP_DRAWRECT_INFO); 457 OUT_RING(DR1); 458 OUT_RING((box.x1 & 0xffff) | (box.y1 << 16)); 459 OUT_RING(((box.x2 - 1) & 0xffff) | ((box.y2 - 1) << 16)); 460 OUT_RING(DR4); 461 OUT_RING(0); 462 ADVANCE_LP_RING(); 463 } 464 465 return 0; 466} 467 468/* XXX: Emitting the counter should really be moved to part of the IRQ 469 * emit. For now, do it in both places: 470 */ 471 472static void i915_emit_breadcrumb(struct drm_device *dev) 473{ 474 drm_i915_private_t *dev_priv = dev->dev_private; 475 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 476 RING_LOCALS; 477 478 dev_priv->counter++; 479 if (dev_priv->counter > 0x7FFFFFFFUL) 480 dev_priv->counter = 0; 481 if (master_priv->sarea_priv) 482 master_priv->sarea_priv->last_enqueue = dev_priv->counter; 483 484 BEGIN_LP_RING(4); 485 OUT_RING(MI_STORE_DWORD_INDEX); 486 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); 487 OUT_RING(dev_priv->counter); 488 OUT_RING(0); 489 ADVANCE_LP_RING(); 490} 491 492static int i915_dispatch_cmdbuffer(struct drm_device * dev, 493 drm_i915_cmdbuffer_t *cmd, 494 struct drm_clip_rect *cliprects, 495 void *cmdbuf) 496{ 497 int nbox = cmd->num_cliprects; 498 int i = 0, count, ret; 499 500 if (cmd->sz & 0x3) { 501 DRM_ERROR("alignment"); 502 return -EINVAL; 503 } 504 505 i915_kernel_lost_context(dev); 506 507 count = nbox ? nbox : 1; 508 509 for (i = 0; i < count; i++) { 510 if (i < nbox) { 511 ret = i915_emit_box(dev, cliprects, i, 512 cmd->DR1, cmd->DR4); 513 if (ret) 514 return ret; 515 } 516 517 ret = i915_emit_cmds(dev, cmdbuf, cmd->sz / 4); 518 if (ret) 519 return ret; 520 } 521 522 i915_emit_breadcrumb(dev); 523 return 0; 524} 525 526static int i915_dispatch_batchbuffer(struct drm_device * dev, 527 drm_i915_batchbuffer_t * batch, 528 struct drm_clip_rect *cliprects) 529{ 530 drm_i915_private_t *dev_priv = dev->dev_private; 531 int nbox = batch->num_cliprects; 532 int i = 0, count; 533 RING_LOCALS; 534 535 if ((batch->start | batch->used) & 0x7) { 536 DRM_ERROR("alignment"); 537 return -EINVAL; 538 } 539 540 i915_kernel_lost_context(dev); 541 542 count = nbox ? nbox : 1; 543 544 for (i = 0; i < count; i++) { 545 if (i < nbox) { 546 int ret = i915_emit_box(dev, cliprects, i, 547 batch->DR1, batch->DR4); 548 if (ret) 549 return ret; 550 } 551 552 if (!IS_I830(dev) && !IS_845G(dev)) { 553 BEGIN_LP_RING(2); 554 if (IS_I965G(dev)) { 555 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6) | MI_BATCH_NON_SECURE_I965); 556 OUT_RING(batch->start); 557 } else { 558 OUT_RING(MI_BATCH_BUFFER_START | (2 << 6)); 559 OUT_RING(batch->start | MI_BATCH_NON_SECURE); 560 } 561 ADVANCE_LP_RING(); 562 } else { 563 BEGIN_LP_RING(4); 564 OUT_RING(MI_BATCH_BUFFER); 565 OUT_RING(batch->start | MI_BATCH_NON_SECURE); 566 OUT_RING(batch->start + batch->used - 4); 567 OUT_RING(0); 568 ADVANCE_LP_RING(); 569 } 570 } 571 572 i915_emit_breadcrumb(dev); 573 574 return 0; 575} 576 577static int i915_dispatch_flip(struct drm_device * dev) 578{ 579 drm_i915_private_t *dev_priv = dev->dev_private; 580 struct drm_i915_master_private *master_priv = 581 dev->primary->master->driver_priv; 582 RING_LOCALS; 583 584 if (!master_priv->sarea_priv) 585 return -EINVAL; 586 587 DRM_DEBUG_DRIVER("%s: page=%d pfCurrentPage=%d\n", 588 __func__, 589 dev_priv->current_page, 590 master_priv->sarea_priv->pf_current_page); 591 592 i915_kernel_lost_context(dev); 593 594 BEGIN_LP_RING(2); 595 OUT_RING(MI_FLUSH | MI_READ_FLUSH); 596 OUT_RING(0); 597 ADVANCE_LP_RING(); 598 599 BEGIN_LP_RING(6); 600 OUT_RING(CMD_OP_DISPLAYBUFFER_INFO | ASYNC_FLIP); 601 OUT_RING(0); 602 if (dev_priv->current_page == 0) { 603 OUT_RING(dev_priv->back_offset); 604 dev_priv->current_page = 1; 605 } else { 606 OUT_RING(dev_priv->front_offset); 607 dev_priv->current_page = 0; 608 } 609 OUT_RING(0); 610 ADVANCE_LP_RING(); 611 612 BEGIN_LP_RING(2); 613 OUT_RING(MI_WAIT_FOR_EVENT | MI_WAIT_FOR_PLANE_A_FLIP); 614 OUT_RING(0); 615 ADVANCE_LP_RING(); 616 617 master_priv->sarea_priv->last_enqueue = dev_priv->counter++; 618 619 BEGIN_LP_RING(4); 620 OUT_RING(MI_STORE_DWORD_INDEX); 621 OUT_RING(I915_BREADCRUMB_INDEX << MI_STORE_DWORD_INDEX_SHIFT); 622 OUT_RING(dev_priv->counter); 623 OUT_RING(0); 624 ADVANCE_LP_RING(); 625 626 master_priv->sarea_priv->pf_current_page = dev_priv->current_page; 627 return 0; 628} 629 630static int i915_quiescent(struct drm_device * dev) 631{ 632 drm_i915_private_t *dev_priv = dev->dev_private; 633 634 i915_kernel_lost_context(dev); 635 return i915_wait_ring(dev, dev_priv->ring.Size - 8, __func__); 636} 637 638static int i915_flush_ioctl(struct drm_device *dev, void *data, 639 struct drm_file *file_priv) 640{ 641 int ret; 642 643 RING_LOCK_TEST_WITH_RETURN(dev, file_priv); 644 645 mutex_lock(&dev->struct_mutex); 646 ret = i915_quiescent(dev); 647 mutex_unlock(&dev->struct_mutex); 648 649 return ret; 650} 651 652static int i915_batchbuffer(struct drm_device *dev, void *data, 653 struct drm_file *file_priv) 654{ 655 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 656 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 657 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *) 658 master_priv->sarea_priv; 659 drm_i915_batchbuffer_t *batch = data; 660 int ret; 661 struct drm_clip_rect *cliprects = NULL; 662 663 if (!dev_priv->allow_batchbuffer) { 664 DRM_ERROR("Batchbuffer ioctl disabled\n"); 665 return -EINVAL; 666 } 667 668 DRM_DEBUG_DRIVER("i915 batchbuffer, start %x used %d cliprects %d\n", 669 batch->start, batch->used, batch->num_cliprects); 670 671 RING_LOCK_TEST_WITH_RETURN(dev, file_priv); 672 673 if (batch->num_cliprects < 0) 674 return -EINVAL; 675 676 if (batch->num_cliprects) { 677 cliprects = kcalloc(batch->num_cliprects, 678 sizeof(struct drm_clip_rect), 679 GFP_KERNEL); 680 if (cliprects == NULL) 681 return -ENOMEM; 682 683 ret = copy_from_user(cliprects, batch->cliprects, 684 batch->num_cliprects * 685 sizeof(struct drm_clip_rect)); 686 if (ret != 0) 687 goto fail_free; 688 } 689 690 mutex_lock(&dev->struct_mutex); 691 ret = i915_dispatch_batchbuffer(dev, batch, cliprects); 692 mutex_unlock(&dev->struct_mutex); 693 694 if (sarea_priv) 695 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); 696 697fail_free: 698 kfree(cliprects); 699 700 return ret; 701} 702 703static int i915_cmdbuffer(struct drm_device *dev, void *data, 704 struct drm_file *file_priv) 705{ 706 drm_i915_private_t *dev_priv = (drm_i915_private_t *) dev->dev_private; 707 struct drm_i915_master_private *master_priv = dev->primary->master->driver_priv; 708 drm_i915_sarea_t *sarea_priv = (drm_i915_sarea_t *) 709 master_priv->sarea_priv; 710 drm_i915_cmdbuffer_t *cmdbuf = data; 711 struct drm_clip_rect *cliprects = NULL; 712 void *batch_data; 713 int ret; 714 715 DRM_DEBUG_DRIVER("i915 cmdbuffer, buf %p sz %d cliprects %d\n", 716 cmdbuf->buf, cmdbuf->sz, cmdbuf->num_cliprects); 717 718 RING_LOCK_TEST_WITH_RETURN(dev, file_priv); 719 720 if (cmdbuf->num_cliprects < 0) 721 return -EINVAL; 722 723 batch_data = kmalloc(cmdbuf->sz, GFP_KERNEL); 724 if (batch_data == NULL) 725 return -ENOMEM; 726 727 ret = copy_from_user(batch_data, cmdbuf->buf, cmdbuf->sz); 728 if (ret != 0) 729 goto fail_batch_free; 730 731 if (cmdbuf->num_cliprects) { 732 cliprects = kcalloc(cmdbuf->num_cliprects, 733 sizeof(struct drm_clip_rect), GFP_KERNEL); 734 if (cliprects == NULL) 735 goto fail_batch_free; 736 737 ret = copy_from_user(cliprects, cmdbuf->cliprects, 738 cmdbuf->num_cliprects * 739 sizeof(struct drm_clip_rect)); 740 if (ret != 0) 741 goto fail_clip_free; 742 } 743 744 mutex_lock(&dev->struct_mutex); 745 ret = i915_dispatch_cmdbuffer(dev, cmdbuf, cliprects, batch_data); 746 mutex_unlock(&dev->struct_mutex); 747 if (ret) { 748 DRM_ERROR("i915_dispatch_cmdbuffer failed\n"); 749 goto fail_clip_free; 750 } 751 752 if (sarea_priv) 753 sarea_priv->last_dispatch = READ_BREADCRUMB(dev_priv); 754 755fail_clip_free: 756 kfree(cliprects); 757fail_batch_free: 758 kfree(batch_data); 759 760 return ret; 761} 762 763static int i915_flip_bufs(struct drm_device *dev, void *data, 764 struct drm_file *file_priv) 765{ 766 int ret; 767 768 DRM_DEBUG_DRIVER("%s\n", __func__); 769 770 RING_LOCK_TEST_WITH_RETURN(dev, file_priv); 771 772 mutex_lock(&dev->struct_mutex); 773 ret = i915_dispatch_flip(dev); 774 mutex_unlock(&dev->struct_mutex); 775 776 return ret; 777} 778 779static int i915_getparam(struct drm_device *dev, void *data, 780 struct drm_file *file_priv) 781{ 782 drm_i915_private_t *dev_priv = dev->dev_private; 783 drm_i915_getparam_t *param = data; 784 int value; 785 786 if (!dev_priv) { 787 DRM_ERROR("called with no initialization\n"); 788 return -EINVAL; 789 } 790 791 switch (param->param) { 792 case I915_PARAM_IRQ_ACTIVE: 793 value = dev->pdev->irq ? 1 : 0; 794 break; 795 case I915_PARAM_ALLOW_BATCHBUFFER: 796 value = dev_priv->allow_batchbuffer ? 1 : 0; 797 break; 798 case I915_PARAM_LAST_DISPATCH: 799 value = READ_BREADCRUMB(dev_priv); 800 break; 801 case I915_PARAM_CHIPSET_ID: 802 value = dev->pci_device; 803 break; 804 case I915_PARAM_HAS_GEM: 805 value = dev_priv->has_gem; 806 break; 807 case I915_PARAM_NUM_FENCES_AVAIL: 808 value = dev_priv->num_fence_regs - dev_priv->fence_reg_start; 809 break; 810 case I915_PARAM_HAS_OVERLAY: 811 value = dev_priv->overlay ? 1 : 0; 812 break; 813 case I915_PARAM_HAS_PAGEFLIPPING: 814 value = 1; 815 break; 816 case I915_PARAM_HAS_EXECBUF2: 817 /* depends on GEM */ 818 value = dev_priv->has_gem; 819 break; 820 default: 821 DRM_DEBUG_DRIVER("Unknown parameter %d\n", 822 param->param); 823 return -EINVAL; 824 } 825 826 if (DRM_COPY_TO_USER(param->value, &value, sizeof(int))) { 827 DRM_ERROR("DRM_COPY_TO_USER failed\n"); 828 return -EFAULT; 829 } 830 831 return 0; 832} 833 834static int i915_setparam(struct drm_device *dev, void *data, 835 struct drm_file *file_priv) 836{ 837 drm_i915_private_t *dev_priv = dev->dev_private; 838 drm_i915_setparam_t *param = data; 839 840 if (!dev_priv) { 841 DRM_ERROR("called with no initialization\n"); 842 return -EINVAL; 843 } 844 845 switch (param->param) { 846 case I915_SETPARAM_USE_MI_BATCHBUFFER_START: 847 break; 848 case I915_SETPARAM_TEX_LRU_LOG_GRANULARITY: 849 dev_priv->tex_lru_log_granularity = param->value; 850 break; 851 case I915_SETPARAM_ALLOW_BATCHBUFFER: 852 dev_priv->allow_batchbuffer = param->value; 853 break; 854 case I915_SETPARAM_NUM_USED_FENCES: 855 if (param->value > dev_priv->num_fence_regs || 856 param->value < 0) 857 return -EINVAL; 858 /* Userspace can use first N regs */ 859 dev_priv->fence_reg_start = param->value; 860 break; 861 default: 862 DRM_DEBUG_DRIVER("unknown parameter %d\n", 863 param->param); 864 return -EINVAL; 865 } 866 867 return 0; 868} 869 870static int i915_set_status_page(struct drm_device *dev, void *data, 871 struct drm_file *file_priv) 872{ 873 drm_i915_private_t *dev_priv = dev->dev_private; 874 drm_i915_hws_addr_t *hws = data; 875 876 if (!I915_NEED_GFX_HWS(dev)) 877 return -EINVAL; 878 879 if (!dev_priv) { 880 DRM_ERROR("called with no initialization\n"); 881 return -EINVAL; 882 } 883 884 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 885 WARN(1, "tried to set status page when mode setting active\n"); 886 return 0; 887 } 888 889 DRM_DEBUG_DRIVER("set status page addr 0x%08x\n", (u32)hws->addr); 890 891 dev_priv->status_gfx_addr = hws->addr & (0x1ffff<<12); 892 893 dev_priv->hws_map.offset = dev->agp->base + hws->addr; 894 dev_priv->hws_map.size = 4*1024; 895 dev_priv->hws_map.type = 0; 896 dev_priv->hws_map.flags = 0; 897 dev_priv->hws_map.mtrr = 0; 898 899 drm_core_ioremap_wc(&dev_priv->hws_map, dev); 900 if (dev_priv->hws_map.handle == NULL) { 901 i915_dma_cleanup(dev); 902 dev_priv->status_gfx_addr = 0; 903 DRM_ERROR("can not ioremap virtual address for" 904 " G33 hw status page\n"); 905 return -ENOMEM; 906 } 907 dev_priv->hw_status_page = dev_priv->hws_map.handle; 908 909 memset(dev_priv->hw_status_page, 0, PAGE_SIZE); 910 I915_WRITE(HWS_PGA, dev_priv->status_gfx_addr); 911 DRM_DEBUG_DRIVER("load hws HWS_PGA with gfx mem 0x%x\n", 912 dev_priv->status_gfx_addr); 913 DRM_DEBUG_DRIVER("load hws at %p\n", 914 dev_priv->hw_status_page); 915 return 0; 916} 917 918static int i915_get_bridge_dev(struct drm_device *dev) 919{ 920 struct drm_i915_private *dev_priv = dev->dev_private; 921 922 dev_priv->bridge_dev = pci_get_bus_and_slot(0, PCI_DEVFN(0,0)); 923 if (!dev_priv->bridge_dev) { 924 DRM_ERROR("bridge device not found\n"); 925 return -1; 926 } 927 return 0; 928} 929 930/** 931 * i915_probe_agp - get AGP bootup configuration 932 * @pdev: PCI device 933 * @aperture_size: returns AGP aperture configured size 934 * @preallocated_size: returns size of BIOS preallocated AGP space 935 * 936 * Since Intel integrated graphics are UMA, the BIOS has to set aside 937 * some RAM for the framebuffer at early boot. This code figures out 938 * how much was set aside so we can use it for our own purposes. 939 */ 940static int i915_probe_agp(struct drm_device *dev, uint32_t *aperture_size, 941 uint32_t *preallocated_size, 942 uint32_t *start) 943{ 944 struct drm_i915_private *dev_priv = dev->dev_private; 945 u16 tmp = 0; 946 unsigned long overhead; 947 unsigned long stolen; 948 949 /* Get the fb aperture size and "stolen" memory amount. */ 950 pci_read_config_word(dev_priv->bridge_dev, INTEL_GMCH_CTRL, &tmp); 951 952 *aperture_size = 1024 * 1024; 953 *preallocated_size = 1024 * 1024; 954 955 switch (dev->pdev->device) { 956 case PCI_DEVICE_ID_INTEL_82830_CGC: 957 case PCI_DEVICE_ID_INTEL_82845G_IG: 958 case PCI_DEVICE_ID_INTEL_82855GM_IG: 959 case PCI_DEVICE_ID_INTEL_82865_IG: 960 if ((tmp & INTEL_GMCH_MEM_MASK) == INTEL_GMCH_MEM_64M) 961 *aperture_size *= 64; 962 else 963 *aperture_size *= 128; 964 break; 965 default: 966 /* 9xx supports large sizes, just look at the length */ 967 *aperture_size = pci_resource_len(dev->pdev, 2); 968 break; 969 } 970 971 /* 972 * Some of the preallocated space is taken by the GTT 973 * and popup. GTT is 1K per MB of aperture size, and popup is 4K. 974 */ 975 if (IS_G4X(dev) || IS_PINEVIEW(dev) || IS_IRONLAKE(dev)) 976 overhead = 4096; 977 else 978 overhead = (*aperture_size / 1024) + 4096; 979 980 switch (tmp & INTEL_GMCH_GMS_MASK) { 981 case INTEL_855_GMCH_GMS_DISABLED: 982 DRM_ERROR("video memory is disabled\n"); 983 return -1; 984 case INTEL_855_GMCH_GMS_STOLEN_1M: 985 stolen = 1 * 1024 * 1024; 986 break; 987 case INTEL_855_GMCH_GMS_STOLEN_4M: 988 stolen = 4 * 1024 * 1024; 989 break; 990 case INTEL_855_GMCH_GMS_STOLEN_8M: 991 stolen = 8 * 1024 * 1024; 992 break; 993 case INTEL_855_GMCH_GMS_STOLEN_16M: 994 stolen = 16 * 1024 * 1024; 995 break; 996 case INTEL_855_GMCH_GMS_STOLEN_32M: 997 stolen = 32 * 1024 * 1024; 998 break; 999 case INTEL_915G_GMCH_GMS_STOLEN_48M: 1000 stolen = 48 * 1024 * 1024; 1001 break; 1002 case INTEL_915G_GMCH_GMS_STOLEN_64M: 1003 stolen = 64 * 1024 * 1024; 1004 break; 1005 case INTEL_GMCH_GMS_STOLEN_128M: 1006 stolen = 128 * 1024 * 1024; 1007 break; 1008 case INTEL_GMCH_GMS_STOLEN_256M: 1009 stolen = 256 * 1024 * 1024; 1010 break; 1011 case INTEL_GMCH_GMS_STOLEN_96M: 1012 stolen = 96 * 1024 * 1024; 1013 break; 1014 case INTEL_GMCH_GMS_STOLEN_160M: 1015 stolen = 160 * 1024 * 1024; 1016 break; 1017 case INTEL_GMCH_GMS_STOLEN_224M: 1018 stolen = 224 * 1024 * 1024; 1019 break; 1020 case INTEL_GMCH_GMS_STOLEN_352M: 1021 stolen = 352 * 1024 * 1024; 1022 break; 1023 default: 1024 DRM_ERROR("unexpected GMCH_GMS value: 0x%02x\n", 1025 tmp & INTEL_GMCH_GMS_MASK); 1026 return -1; 1027 } 1028 *preallocated_size = stolen - overhead; 1029 *start = overhead; 1030 1031 return 0; 1032} 1033 1034#define PTE_ADDRESS_MASK 0xfffff000 1035#define PTE_ADDRESS_MASK_HIGH 0x000000f0 /* i915+ */ 1036#define PTE_MAPPING_TYPE_UNCACHED (0 << 1) 1037#define PTE_MAPPING_TYPE_DCACHE (1 << 1) /* i830 only */ 1038#define PTE_MAPPING_TYPE_CACHED (3 << 1) 1039#define PTE_MAPPING_TYPE_MASK (3 << 1) 1040#define PTE_VALID (1 << 0) 1041 1042/** 1043 * i915_gtt_to_phys - take a GTT address and turn it into a physical one 1044 * @dev: drm device 1045 * @gtt_addr: address to translate 1046 * 1047 * Some chip functions require allocations from stolen space but need the 1048 * physical address of the memory in question. We use this routine 1049 * to get a physical address suitable for register programming from a given 1050 * GTT address. 1051 */ 1052static unsigned long i915_gtt_to_phys(struct drm_device *dev, 1053 unsigned long gtt_addr) 1054{ 1055 unsigned long *gtt; 1056 unsigned long entry, phys; 1057 int gtt_bar = IS_I9XX(dev) ? 0 : 1; 1058 int gtt_offset, gtt_size; 1059 1060 if (IS_I965G(dev)) { 1061 if (IS_G4X(dev) || IS_IRONLAKE(dev)) { 1062 gtt_offset = 2*1024*1024; 1063 gtt_size = 2*1024*1024; 1064 } else { 1065 gtt_offset = 512*1024; 1066 gtt_size = 512*1024; 1067 } 1068 } else { 1069 gtt_bar = 3; 1070 gtt_offset = 0; 1071 gtt_size = pci_resource_len(dev->pdev, gtt_bar); 1072 } 1073 1074 gtt = ioremap_wc(pci_resource_start(dev->pdev, gtt_bar) + gtt_offset, 1075 gtt_size); 1076 if (!gtt) { 1077 DRM_ERROR("ioremap of GTT failed\n"); 1078 return 0; 1079 } 1080 1081 entry = *(volatile u32 *)(gtt + (gtt_addr / 1024)); 1082 1083 DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, PTE: 0x%08lx\n", gtt_addr, entry); 1084 1085 /* Mask out these reserved bits on this hardware. */ 1086 if (!IS_I9XX(dev) || IS_I915G(dev) || IS_I915GM(dev) || 1087 IS_I945G(dev) || IS_I945GM(dev)) { 1088 entry &= ~PTE_ADDRESS_MASK_HIGH; 1089 } 1090 1091 /* If it's not a mapping type we know, then bail. */ 1092 if ((entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_UNCACHED && 1093 (entry & PTE_MAPPING_TYPE_MASK) != PTE_MAPPING_TYPE_CACHED) { 1094 iounmap(gtt); 1095 return 0; 1096 } 1097 1098 if (!(entry & PTE_VALID)) { 1099 DRM_ERROR("bad GTT entry in stolen space\n"); 1100 iounmap(gtt); 1101 return 0; 1102 } 1103 1104 iounmap(gtt); 1105 1106 phys =(entry & PTE_ADDRESS_MASK) | 1107 ((uint64_t)(entry & PTE_ADDRESS_MASK_HIGH) << (32 - 4)); 1108 1109 DRM_DEBUG_DRIVER("GTT addr: 0x%08lx, phys addr: 0x%08lx\n", gtt_addr, phys); 1110 1111 return phys; 1112} 1113 1114static void i915_warn_stolen(struct drm_device *dev) 1115{ 1116 DRM_ERROR("not enough stolen space for compressed buffer, disabling\n"); 1117 DRM_ERROR("hint: you may be able to increase stolen memory size in the BIOS to avoid this\n"); 1118} 1119 1120static void i915_setup_compression(struct drm_device *dev, int size) 1121{ 1122 struct drm_i915_private *dev_priv = dev->dev_private; 1123 struct drm_mm_node *compressed_fb, *compressed_llb; 1124 unsigned long cfb_base; 1125 unsigned long ll_base = 0; 1126 1127 /* Leave 1M for line length buffer & misc. */ 1128 compressed_fb = drm_mm_search_free(&dev_priv->vram, size, 4096, 0); 1129 if (!compressed_fb) { 1130 i915_warn_stolen(dev); 1131 return; 1132 } 1133 1134 compressed_fb = drm_mm_get_block(compressed_fb, size, 4096); 1135 if (!compressed_fb) { 1136 i915_warn_stolen(dev); 1137 return; 1138 } 1139 1140 cfb_base = i915_gtt_to_phys(dev, compressed_fb->start); 1141 if (!cfb_base) { 1142 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n"); 1143 drm_mm_put_block(compressed_fb); 1144 } 1145 1146 if (!IS_GM45(dev)) { 1147 compressed_llb = drm_mm_search_free(&dev_priv->vram, 4096, 1148 4096, 0); 1149 if (!compressed_llb) { 1150 i915_warn_stolen(dev); 1151 return; 1152 } 1153 1154 compressed_llb = drm_mm_get_block(compressed_llb, 4096, 4096); 1155 if (!compressed_llb) { 1156 i915_warn_stolen(dev); 1157 return; 1158 } 1159 1160 ll_base = i915_gtt_to_phys(dev, compressed_llb->start); 1161 if (!ll_base) { 1162 DRM_ERROR("failed to get stolen phys addr, disabling FBC\n"); 1163 drm_mm_put_block(compressed_fb); 1164 drm_mm_put_block(compressed_llb); 1165 } 1166 } 1167 1168 dev_priv->cfb_size = size; 1169 1170 if (IS_GM45(dev)) { 1171 g4x_disable_fbc(dev); 1172 I915_WRITE(DPFC_CB_BASE, compressed_fb->start); 1173 } else { 1174 i8xx_disable_fbc(dev); 1175 I915_WRITE(FBC_CFB_BASE, cfb_base); 1176 I915_WRITE(FBC_LL_BASE, ll_base); 1177 } 1178 1179 DRM_DEBUG("FBC base 0x%08lx, ll base 0x%08lx, size %dM\n", cfb_base, 1180 ll_base, size >> 20); 1181} 1182 1183/* true = enable decode, false = disable decoder */ 1184static unsigned int i915_vga_set_decode(void *cookie, bool state) 1185{ 1186 struct drm_device *dev = cookie; 1187 1188 intel_modeset_vga_set_state(dev, state); 1189 if (state) 1190 return VGA_RSRC_LEGACY_IO | VGA_RSRC_LEGACY_MEM | 1191 VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; 1192 else 1193 return VGA_RSRC_NORMAL_IO | VGA_RSRC_NORMAL_MEM; 1194} 1195 1196static int i915_load_modeset_init(struct drm_device *dev, 1197 unsigned long prealloc_start, 1198 unsigned long prealloc_size, 1199 unsigned long agp_size) 1200{ 1201 struct drm_i915_private *dev_priv = dev->dev_private; 1202 int fb_bar = IS_I9XX(dev) ? 2 : 0; 1203 int ret = 0; 1204 1205 dev->mode_config.fb_base = drm_get_resource_start(dev, fb_bar) & 1206 0xff000000; 1207 1208 /* Basic memrange allocator for stolen space (aka vram) */ 1209 drm_mm_init(&dev_priv->vram, 0, prealloc_size); 1210 DRM_INFO("set up %ldM of stolen space\n", prealloc_size / (1024*1024)); 1211 1212 /* We're off and running w/KMS */ 1213 dev_priv->mm.suspended = 0; 1214 1215 /* Let GEM Manage from end of prealloc space to end of aperture. 1216 * 1217 * However, leave one page at the end still bound to the scratch page. 1218 * There are a number of places where the hardware apparently 1219 * prefetches past the end of the object, and we've seen multiple 1220 * hangs with the GPU head pointer stuck in a batchbuffer bound 1221 * at the last page of the aperture. One page should be enough to 1222 * keep any prefetching inside of the aperture. 1223 */ 1224 i915_gem_do_init(dev, prealloc_size, agp_size - 4096); 1225 1226 mutex_lock(&dev->struct_mutex); 1227 ret = i915_gem_init_ringbuffer(dev); 1228 mutex_unlock(&dev->struct_mutex); 1229 if (ret) 1230 goto out; 1231 1232 /* Try to set up FBC with a reasonable compressed buffer size */ 1233 if (I915_HAS_FBC(dev) && i915_powersave) { 1234 int cfb_size; 1235 1236 /* Try to get an 8M buffer... */ 1237 if (prealloc_size > (9*1024*1024)) 1238 cfb_size = 8*1024*1024; 1239 else /* fall back to 7/8 of the stolen space */ 1240 cfb_size = prealloc_size * 7 / 8; 1241 i915_setup_compression(dev, cfb_size); 1242 } 1243 1244 /* Allow hardware batchbuffers unless told otherwise. 1245 */ 1246 dev_priv->allow_batchbuffer = 1; 1247 1248 ret = intel_init_bios(dev); 1249 if (ret) 1250 DRM_INFO("failed to find VBIOS tables\n"); 1251 1252 /* if we have > 1 VGA cards, then disable the radeon VGA resources */ 1253 ret = vga_client_register(dev->pdev, dev, NULL, i915_vga_set_decode); 1254 if (ret) 1255 goto destroy_ringbuffer; 1256 1257 intel_modeset_init(dev); 1258 1259 ret = drm_irq_install(dev); 1260 if (ret) 1261 goto destroy_ringbuffer; 1262 1263 /* Always safe in the mode setting case. */ 1264 /* FIXME: do pre/post-mode set stuff in core KMS code */ 1265 dev->vblank_disable_allowed = 1; 1266 1267 /* 1268 * Initialize the hardware status page IRQ location. 1269 */ 1270 1271 I915_WRITE(INSTPM, (1 << 5) | (1 << 21)); 1272 1273 drm_helper_initial_config(dev); 1274 1275 return 0; 1276 1277destroy_ringbuffer: 1278 i915_gem_cleanup_ringbuffer(dev); 1279out: 1280 return ret; 1281} 1282 1283int i915_master_create(struct drm_device *dev, struct drm_master *master) 1284{ 1285 struct drm_i915_master_private *master_priv; 1286 1287 master_priv = kzalloc(sizeof(*master_priv), GFP_KERNEL); 1288 if (!master_priv) 1289 return -ENOMEM; 1290 1291 master->driver_priv = master_priv; 1292 return 0; 1293} 1294 1295void i915_master_destroy(struct drm_device *dev, struct drm_master *master) 1296{ 1297 struct drm_i915_master_private *master_priv = master->driver_priv; 1298 1299 if (!master_priv) 1300 return; 1301 1302 kfree(master_priv); 1303 1304 master->driver_priv = NULL; 1305} 1306 1307static void i915_get_mem_freq(struct drm_device *dev) 1308{ 1309 drm_i915_private_t *dev_priv = dev->dev_private; 1310 u32 tmp; 1311 1312 if (!IS_PINEVIEW(dev)) 1313 return; 1314 1315 tmp = I915_READ(CLKCFG); 1316 1317 switch (tmp & CLKCFG_FSB_MASK) { 1318 case CLKCFG_FSB_533: 1319 dev_priv->fsb_freq = 533; /* 133*4 */ 1320 break; 1321 case CLKCFG_FSB_800: 1322 dev_priv->fsb_freq = 800; /* 200*4 */ 1323 break; 1324 case CLKCFG_FSB_667: 1325 dev_priv->fsb_freq = 667; /* 167*4 */ 1326 break; 1327 case CLKCFG_FSB_400: 1328 dev_priv->fsb_freq = 400; /* 100*4 */ 1329 break; 1330 } 1331 1332 switch (tmp & CLKCFG_MEM_MASK) { 1333 case CLKCFG_MEM_533: 1334 dev_priv->mem_freq = 533; 1335 break; 1336 case CLKCFG_MEM_667: 1337 dev_priv->mem_freq = 667; 1338 break; 1339 case CLKCFG_MEM_800: 1340 dev_priv->mem_freq = 800; 1341 break; 1342 } 1343} 1344 1345/** 1346 * i915_driver_load - setup chip and create an initial config 1347 * @dev: DRM device 1348 * @flags: startup flags 1349 * 1350 * The driver load routine has to do several things: 1351 * - drive output discovery via intel_modeset_init() 1352 * - initialize the memory manager 1353 * - allocate initial config memory 1354 * - setup the DRM framebuffer with the allocated memory 1355 */ 1356int i915_driver_load(struct drm_device *dev, unsigned long flags) 1357{ 1358 struct drm_i915_private *dev_priv = dev->dev_private; 1359 resource_size_t base, size; 1360 int ret = 0, mmio_bar; 1361 uint32_t agp_size, prealloc_size, prealloc_start; 1362 1363 /* i915 has 4 more counters */ 1364 dev->counters += 4; 1365 dev->types[6] = _DRM_STAT_IRQ; 1366 dev->types[7] = _DRM_STAT_PRIMARY; 1367 dev->types[8] = _DRM_STAT_SECONDARY; 1368 dev->types[9] = _DRM_STAT_DMA; 1369 1370 dev_priv = kzalloc(sizeof(drm_i915_private_t), GFP_KERNEL); 1371 if (dev_priv == NULL) 1372 return -ENOMEM; 1373 1374 dev->dev_private = (void *)dev_priv; 1375 dev_priv->dev = dev; 1376 dev_priv->info = (struct intel_device_info *) flags; 1377 1378 /* Add register map (needed for suspend/resume) */ 1379 mmio_bar = IS_I9XX(dev) ? 0 : 1; 1380 base = drm_get_resource_start(dev, mmio_bar); 1381 size = drm_get_resource_len(dev, mmio_bar); 1382 1383 if (i915_get_bridge_dev(dev)) { 1384 ret = -EIO; 1385 goto free_priv; 1386 } 1387 1388 dev_priv->regs = ioremap(base, size); 1389 if (!dev_priv->regs) { 1390 DRM_ERROR("failed to map registers\n"); 1391 ret = -EIO; 1392 goto put_bridge; 1393 } 1394 1395 dev_priv->mm.gtt_mapping = 1396 io_mapping_create_wc(dev->agp->base, 1397 dev->agp->agp_info.aper_size * 1024*1024); 1398 if (dev_priv->mm.gtt_mapping == NULL) { 1399 ret = -EIO; 1400 goto out_rmmap; 1401 } 1402 1403 /* Set up a WC MTRR for non-PAT systems. This is more common than 1404 * one would think, because the kernel disables PAT on first 1405 * generation Core chips because WC PAT gets overridden by a UC 1406 * MTRR if present. Even if a UC MTRR isn't present. 1407 */ 1408 dev_priv->mm.gtt_mtrr = mtrr_add(dev->agp->base, 1409 dev->agp->agp_info.aper_size * 1410 1024 * 1024, 1411 MTRR_TYPE_WRCOMB, 1); 1412 if (dev_priv->mm.gtt_mtrr < 0) { 1413 DRM_INFO("MTRR allocation failed. Graphics " 1414 "performance may suffer.\n"); 1415 } 1416 1417 ret = i915_probe_agp(dev, &agp_size, &prealloc_size, &prealloc_start); 1418 if (ret) 1419 goto out_iomapfree; 1420 1421 dev_priv->wq = create_singlethread_workqueue("i915"); 1422 if (dev_priv->wq == NULL) { 1423 DRM_ERROR("Failed to create our workqueue.\n"); 1424 ret = -ENOMEM; 1425 goto out_iomapfree; 1426 } 1427 1428 /* enable GEM by default */ 1429 dev_priv->has_gem = 1; 1430 1431 if (prealloc_size > agp_size * 3 / 4) { 1432 DRM_ERROR("Detected broken video BIOS with %d/%dkB of video " 1433 "memory stolen.\n", 1434 prealloc_size / 1024, agp_size / 1024); 1435 DRM_ERROR("Disabling GEM. (try reducing stolen memory or " 1436 "updating the BIOS to fix).\n"); 1437 dev_priv->has_gem = 0; 1438 } 1439 1440 dev->driver->get_vblank_counter = i915_get_vblank_counter; 1441 dev->max_vblank_count = 0xffffff; /* only 24 bits of frame count */ 1442 if (IS_G4X(dev) || IS_IRONLAKE(dev)) { 1443 dev->max_vblank_count = 0xffffffff; /* full 32 bit counter */ 1444 dev->driver->get_vblank_counter = gm45_get_vblank_counter; 1445 } 1446 1447 i915_gem_load(dev); 1448 1449 /* Init HWS */ 1450 if (!I915_NEED_GFX_HWS(dev)) { 1451 ret = i915_init_phys_hws(dev); 1452 if (ret != 0) 1453 goto out_workqueue_free; 1454 } 1455 1456 i915_get_mem_freq(dev); 1457 1458 /* On the 945G/GM, the chipset reports the MSI capability on the 1459 * integrated graphics even though the support isn't actually there 1460 * according to the published specs. It doesn't appear to function 1461 * correctly in testing on 945G. 1462 * This may be a side effect of MSI having been made available for PEG 1463 * and the registers being closely associated. 1464 * 1465 * According to chipset errata, on the 965GM, MSI interrupts may 1466 * be lost or delayed, but we use them anyways to avoid 1467 * stuck interrupts on some machines. 1468 */ 1469 if (!IS_I945G(dev) && !IS_I945GM(dev)) 1470 pci_enable_msi(dev->pdev); 1471 1472 spin_lock_init(&dev_priv->user_irq_lock); 1473 spin_lock_init(&dev_priv->error_lock); 1474 dev_priv->user_irq_refcount = 0; 1475 dev_priv->trace_irq_seqno = 0; 1476 1477 ret = drm_vblank_init(dev, I915_NUM_PIPE); 1478 1479 if (ret) { 1480 (void) i915_driver_unload(dev); 1481 return ret; 1482 } 1483 1484 /* Start out suspended */ 1485 dev_priv->mm.suspended = 1; 1486 1487 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 1488 ret = i915_load_modeset_init(dev, prealloc_start, 1489 prealloc_size, agp_size); 1490 if (ret < 0) { 1491 DRM_ERROR("failed to init modeset\n"); 1492 goto out_workqueue_free; 1493 } 1494 } 1495 1496 /* Must be done after probing outputs */ 1497 intel_opregion_init(dev, 0); 1498 1499 setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed, 1500 (unsigned long) dev); 1501 return 0; 1502 1503out_workqueue_free: 1504 destroy_workqueue(dev_priv->wq); 1505out_iomapfree: 1506 io_mapping_free(dev_priv->mm.gtt_mapping); 1507out_rmmap: 1508 iounmap(dev_priv->regs); 1509put_bridge: 1510 pci_dev_put(dev_priv->bridge_dev); 1511free_priv: 1512 kfree(dev_priv); 1513 return ret; 1514} 1515 1516int i915_driver_unload(struct drm_device *dev) 1517{ 1518 struct drm_i915_private *dev_priv = dev->dev_private; 1519 1520 destroy_workqueue(dev_priv->wq); 1521 del_timer_sync(&dev_priv->hangcheck_timer); 1522 1523 io_mapping_free(dev_priv->mm.gtt_mapping); 1524 if (dev_priv->mm.gtt_mtrr >= 0) { 1525 mtrr_del(dev_priv->mm.gtt_mtrr, dev->agp->base, 1526 dev->agp->agp_info.aper_size * 1024 * 1024); 1527 dev_priv->mm.gtt_mtrr = -1; 1528 } 1529 1530 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 1531 /* 1532 * free the memory space allocated for the child device 1533 * config parsed from VBT 1534 */ 1535 if (dev_priv->child_dev && dev_priv->child_dev_num) { 1536 kfree(dev_priv->child_dev); 1537 dev_priv->child_dev = NULL; 1538 dev_priv->child_dev_num = 0; 1539 } 1540 drm_irq_uninstall(dev); 1541 vga_client_register(dev->pdev, NULL, NULL, NULL); 1542 } 1543 1544 if (dev->pdev->msi_enabled) 1545 pci_disable_msi(dev->pdev); 1546 1547 if (dev_priv->regs != NULL) 1548 iounmap(dev_priv->regs); 1549 1550 intel_opregion_free(dev, 0); 1551 1552 if (drm_core_check_feature(dev, DRIVER_MODESET)) { 1553 intel_modeset_cleanup(dev); 1554 1555 i915_gem_free_all_phys_object(dev); 1556 1557 mutex_lock(&dev->struct_mutex); 1558 i915_gem_cleanup_ringbuffer(dev); 1559 mutex_unlock(&dev->struct_mutex); 1560 drm_mm_takedown(&dev_priv->vram); 1561 i915_gem_lastclose(dev); 1562 1563 intel_cleanup_overlay(dev); 1564 } 1565 1566 pci_dev_put(dev_priv->bridge_dev); 1567 kfree(dev->dev_private); 1568 1569 return 0; 1570} 1571 1572int i915_driver_open(struct drm_device *dev, struct drm_file *file_priv) 1573{ 1574 struct drm_i915_file_private *i915_file_priv; 1575 1576 DRM_DEBUG_DRIVER("\n"); 1577 i915_file_priv = (struct drm_i915_file_private *) 1578 kmalloc(sizeof(*i915_file_priv), GFP_KERNEL); 1579 1580 if (!i915_file_priv) 1581 return -ENOMEM; 1582 1583 file_priv->driver_priv = i915_file_priv; 1584 1585 INIT_LIST_HEAD(&i915_file_priv->mm.request_list); 1586 1587 return 0; 1588} 1589 1590/** 1591 * i915_driver_lastclose - clean up after all DRM clients have exited 1592 * @dev: DRM device 1593 * 1594 * Take care of cleaning up after all DRM clients have exited. In the 1595 * mode setting case, we want to restore the kernel's initial mode (just 1596 * in case the last client left us in a bad state). 1597 * 1598 * Additionally, in the non-mode setting case, we'll tear down the AGP 1599 * and DMA structures, since the kernel won't be using them, and clea 1600 * up any GEM state. 1601 */ 1602void i915_driver_lastclose(struct drm_device * dev) 1603{ 1604 drm_i915_private_t *dev_priv = dev->dev_private; 1605 1606 if (!dev_priv || drm_core_check_feature(dev, DRIVER_MODESET)) { 1607 drm_fb_helper_restore(); 1608 return; 1609 } 1610 1611 i915_gem_lastclose(dev); 1612 1613 if (dev_priv->agp_heap) 1614 i915_mem_takedown(&(dev_priv->agp_heap)); 1615 1616 i915_dma_cleanup(dev); 1617} 1618 1619void i915_driver_preclose(struct drm_device * dev, struct drm_file *file_priv) 1620{ 1621 drm_i915_private_t *dev_priv = dev->dev_private; 1622 i915_gem_release(dev, file_priv); 1623 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 1624 i915_mem_release(dev, file_priv, dev_priv->agp_heap); 1625} 1626 1627void i915_driver_postclose(struct drm_device *dev, struct drm_file *file_priv) 1628{ 1629 struct drm_i915_file_private *i915_file_priv = file_priv->driver_priv; 1630 1631 kfree(i915_file_priv); 1632} 1633 1634struct drm_ioctl_desc i915_ioctls[] = { 1635 DRM_IOCTL_DEF(DRM_I915_INIT, i915_dma_init, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1636 DRM_IOCTL_DEF(DRM_I915_FLUSH, i915_flush_ioctl, DRM_AUTH), 1637 DRM_IOCTL_DEF(DRM_I915_FLIP, i915_flip_bufs, DRM_AUTH), 1638 DRM_IOCTL_DEF(DRM_I915_BATCHBUFFER, i915_batchbuffer, DRM_AUTH), 1639 DRM_IOCTL_DEF(DRM_I915_IRQ_EMIT, i915_irq_emit, DRM_AUTH), 1640 DRM_IOCTL_DEF(DRM_I915_IRQ_WAIT, i915_irq_wait, DRM_AUTH), 1641 DRM_IOCTL_DEF(DRM_I915_GETPARAM, i915_getparam, DRM_AUTH), 1642 DRM_IOCTL_DEF(DRM_I915_SETPARAM, i915_setparam, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1643 DRM_IOCTL_DEF(DRM_I915_ALLOC, i915_mem_alloc, DRM_AUTH), 1644 DRM_IOCTL_DEF(DRM_I915_FREE, i915_mem_free, DRM_AUTH), 1645 DRM_IOCTL_DEF(DRM_I915_INIT_HEAP, i915_mem_init_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1646 DRM_IOCTL_DEF(DRM_I915_CMDBUFFER, i915_cmdbuffer, DRM_AUTH), 1647 DRM_IOCTL_DEF(DRM_I915_DESTROY_HEAP, i915_mem_destroy_heap, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ), 1648 DRM_IOCTL_DEF(DRM_I915_SET_VBLANK_PIPE, i915_vblank_pipe_set, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY ), 1649 DRM_IOCTL_DEF(DRM_I915_GET_VBLANK_PIPE, i915_vblank_pipe_get, DRM_AUTH ), 1650 DRM_IOCTL_DEF(DRM_I915_VBLANK_SWAP, i915_vblank_swap, DRM_AUTH), 1651 DRM_IOCTL_DEF(DRM_I915_HWS_ADDR, i915_set_status_page, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1652 DRM_IOCTL_DEF(DRM_I915_GEM_INIT, i915_gem_init_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1653 DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER, i915_gem_execbuffer, DRM_AUTH), 1654 DRM_IOCTL_DEF(DRM_I915_GEM_EXECBUFFER2, i915_gem_execbuffer2, DRM_AUTH), 1655 DRM_IOCTL_DEF(DRM_I915_GEM_PIN, i915_gem_pin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), 1656 DRM_IOCTL_DEF(DRM_I915_GEM_UNPIN, i915_gem_unpin_ioctl, DRM_AUTH|DRM_ROOT_ONLY), 1657 DRM_IOCTL_DEF(DRM_I915_GEM_BUSY, i915_gem_busy_ioctl, DRM_AUTH), 1658 DRM_IOCTL_DEF(DRM_I915_GEM_THROTTLE, i915_gem_throttle_ioctl, DRM_AUTH), 1659 DRM_IOCTL_DEF(DRM_I915_GEM_ENTERVT, i915_gem_entervt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1660 DRM_IOCTL_DEF(DRM_I915_GEM_LEAVEVT, i915_gem_leavevt_ioctl, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY), 1661 DRM_IOCTL_DEF(DRM_I915_GEM_CREATE, i915_gem_create_ioctl, 0), 1662 DRM_IOCTL_DEF(DRM_I915_GEM_PREAD, i915_gem_pread_ioctl, 0), 1663 DRM_IOCTL_DEF(DRM_I915_GEM_PWRITE, i915_gem_pwrite_ioctl, 0), 1664 DRM_IOCTL_DEF(DRM_I915_GEM_MMAP, i915_gem_mmap_ioctl, 0), 1665 DRM_IOCTL_DEF(DRM_I915_GEM_MMAP_GTT, i915_gem_mmap_gtt_ioctl, 0), 1666 DRM_IOCTL_DEF(DRM_I915_GEM_SET_DOMAIN, i915_gem_set_domain_ioctl, 0), 1667 DRM_IOCTL_DEF(DRM_I915_GEM_SW_FINISH, i915_gem_sw_finish_ioctl, 0), 1668 DRM_IOCTL_DEF(DRM_I915_GEM_SET_TILING, i915_gem_set_tiling, 0), 1669 DRM_IOCTL_DEF(DRM_I915_GEM_GET_TILING, i915_gem_get_tiling, 0), 1670 DRM_IOCTL_DEF(DRM_I915_GEM_GET_APERTURE, i915_gem_get_aperture_ioctl, 0), 1671 DRM_IOCTL_DEF(DRM_I915_GET_PIPE_FROM_CRTC_ID, intel_get_pipe_from_crtc_id, 0), 1672 DRM_IOCTL_DEF(DRM_I915_GEM_MADVISE, i915_gem_madvise_ioctl, 0), 1673 DRM_IOCTL_DEF(DRM_I915_OVERLAY_PUT_IMAGE, intel_overlay_put_image, DRM_MASTER|DRM_CONTROL_ALLOW), 1674 DRM_IOCTL_DEF(DRM_I915_OVERLAY_ATTRS, intel_overlay_attrs, DRM_MASTER|DRM_CONTROL_ALLOW), 1675}; 1676 1677int i915_max_ioctl = DRM_ARRAY_SIZE(i915_ioctls); 1678 1679/** 1680 * Determine if the device really is AGP or not. 1681 * 1682 * All Intel graphics chipsets are treated as AGP, even if they are really 1683 * PCI-e. 1684 * 1685 * \param dev The device to be tested. 1686 * 1687 * \returns 1688 * A value of 1 is always retured to indictate every i9x5 is AGP. 1689 */ 1690int i915_driver_device_is_agp(struct drm_device * dev) 1691{ 1692 return 1; 1693} 1694