/* * Copyright © 2006-2007 Intel Corporation * Copyright (c) 2006 Dave Airlie * * Permission is hereby granted, free of charge, to any person obtaining a * copy of this software and associated documentation files (the "Software"), * to deal in the Software without restriction, including without limitation * the rights to use, copy, modify, merge, publish, distribute, sublicense, * and/or sell copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice (including the next * paragraph) shall be included in all copies or substantial portions of the * Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER * DEALINGS IN THE SOFTWARE. * * Authors: * Eric Anholt * Dave Airlie * Jesse Barnes */ #include #include "drmP.h" #include "drm.h" #include "drm_crtc.h" #include "drm_edid.h" #include "intel_drv.h" #include "i915_drm.h" #include "i915_drv.h" /** * Sets the backlight level. * * \param level backlight level, from 0 to intel_lvds_get_max_backlight(). */ static void intel_lvds_set_backlight(struct drm_device *dev, int level) { drm_i915_private_t *dev_priv = dev->dev_private; u32 blc_pwm_ctl; blc_pwm_ctl = I915_READ(BLC_PWM_CTL) & ~BACKLIGHT_DUTY_CYCLE_MASK; I915_WRITE(BLC_PWM_CTL, (blc_pwm_ctl | (level << BACKLIGHT_DUTY_CYCLE_SHIFT))); } /** * Returns the maximum level of the backlight duty cycle field. */ static u32 intel_lvds_get_max_backlight(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; return ((I915_READ(BLC_PWM_CTL) & BACKLIGHT_MODULATION_FREQ_MASK) >> BACKLIGHT_MODULATION_FREQ_SHIFT) * 2; } /** * Sets the power state for the panel. */ static void intel_lvds_set_power(struct drm_device *dev, bool on) { drm_i915_private_t *dev_priv = dev->dev_private; u32 pp_status; if (on) { I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | POWER_TARGET_ON); do { pp_status = I915_READ(PP_STATUS); } while ((pp_status & PP_ON) == 0); intel_lvds_set_backlight(dev, dev_priv->backlight_duty_cycle); } else { intel_lvds_set_backlight(dev, 0); I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) & ~POWER_TARGET_ON); do { pp_status = I915_READ(PP_STATUS); } while (pp_status & PP_ON); } } static void intel_lvds_dpms(struct drm_output *output, int mode) { struct drm_device *dev = output->dev; if (mode == DPMSModeOn) intel_lvds_set_power(dev, true); else intel_lvds_set_power(dev, false); /* XXX: We never power down the LVDS pairs. */ } static void intel_lvds_save(struct drm_output *output) { struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; dev_priv->savePP_ON = I915_READ(LVDSPP_ON); dev_priv->savePP_OFF = I915_READ(LVDSPP_OFF); dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL); dev_priv->savePP_CYCLE = I915_READ(PP_CYCLE); dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); dev_priv->backlight_duty_cycle = (dev_priv->saveBLC_PWM_CTL & BACKLIGHT_DUTY_CYCLE_MASK); /* * If the light is off at server startup, just make it full brightness */ if (dev_priv->backlight_duty_cycle == 0) dev_priv->backlight_duty_cycle = intel_lvds_get_max_backlight(dev); } static void intel_lvds_restore(struct drm_output *output) { struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL); I915_WRITE(LVDSPP_ON, dev_priv->savePP_ON); I915_WRITE(LVDSPP_OFF, dev_priv->savePP_OFF); I915_WRITE(PP_CYCLE, dev_priv->savePP_CYCLE); I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL); if (dev_priv->savePP_CONTROL & POWER_TARGET_ON) intel_lvds_set_power(dev, true); else intel_lvds_set_power(dev, false); } static int intel_lvds_mode_valid(struct drm_output *output, struct drm_display_mode *mode) { struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; struct drm_display_mode *fixed_mode = dev_priv->panel_fixed_mode; if (fixed_mode) { if (mode->hdisplay > fixed_mode->hdisplay) return MODE_PANEL; if (mode->vdisplay > fixed_mode->vdisplay) return MODE_PANEL; } return MODE_OK; } static bool intel_lvds_mode_fixup(struct drm_output *output, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = output->crtc->driver_private; struct drm_output *tmp_output; #if 0 spin_lock(&dev->mode_config.config_lock); list_for_each_entry(tmp_output, &dev->mode_config.output_list, head) { if (tmp_output != output && tmp_output->crtc == output->crtc) { printk(KERN_ERR "Can't enable LVDS and another " "output on the same pipe\n"); return false; } } spin_lock(&dev->mode_config.config_lock); #endif if (intel_crtc->pipe == 0) { printk(KERN_ERR "Can't support LVDS on pipe A\n"); return false; } /* * If we have timings from the BIOS for the panel, put them in * to the adjusted mode. The CRTC will be set up for this mode, * with the panel scaling set up to source from the H/VDisplay * of the original mode. */ if (dev_priv->panel_fixed_mode != NULL) { adjusted_mode->hdisplay = dev_priv->panel_fixed_mode->hdisplay; adjusted_mode->hsync_start = dev_priv->panel_fixed_mode->hsync_start; adjusted_mode->hsync_end = dev_priv->panel_fixed_mode->hsync_end; adjusted_mode->htotal = dev_priv->panel_fixed_mode->htotal; adjusted_mode->vdisplay = dev_priv->panel_fixed_mode->vdisplay; adjusted_mode->vsync_start = dev_priv->panel_fixed_mode->vsync_start; adjusted_mode->vsync_end = dev_priv->panel_fixed_mode->vsync_end; adjusted_mode->vtotal = dev_priv->panel_fixed_mode->vtotal; adjusted_mode->clock = dev_priv->panel_fixed_mode->clock; drm_mode_set_crtcinfo(adjusted_mode, CRTC_INTERLACE_HALVE_V); } /* * XXX: It would be nice to support lower refresh rates on the * panels to reduce power consumption, and perhaps match the * user's requested refresh rate. */ return true; } static void intel_lvds_mode_set(struct drm_output *output, struct drm_display_mode *mode, struct drm_display_mode *adjusted_mode) { struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; struct intel_crtc *intel_crtc = output->crtc->driver_private; u32 pfit_control; /* * The LVDS pin pair will already have been turned on in the * intel_crtc_mode_set since it has a large impact on the DPLL * settings. */ /* * Enable automatic panel scaling so that non-native modes fill the * screen. Should be enabled before the pipe is enabled, according to * register description and PRM. */ pfit_control = (PFIT_ENABLE | VERT_AUTO_SCALE | HORIZ_AUTO_SCALE | VERT_INTERP_BILINEAR | HORIZ_INTERP_BILINEAR); if (!IS_I965G(dev)) { if (dev_priv->panel_wants_dither) pfit_control |= PANEL_8TO6_DITHER_ENABLE; } else pfit_control |= intel_crtc->pipe << PFIT_PIPE_SHIFT; I915_WRITE(PFIT_CONTROL, pfit_control); } /** * Detect the LVDS connection. * * This always returns OUTPUT_STATUS_CONNECTED. This output should only have * been set up if the LVDS was actually connected anyway. */ static enum drm_output_status intel_lvds_detect(struct drm_output *output) { return output_status_connected; } /** * Return the list of DDC modes if available, or the BIOS fixed mode otherwise. */ static int intel_lvds_get_modes(struct drm_output *output) { struct intel_output *intel_output = output->driver_private; struct drm_device *dev = output->dev; drm_i915_private_t *dev_priv = dev->dev_private; struct edid *edid_info; int ret = 0; intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); if (!intel_output->ddc_bus) { dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " "failed.\n"); return 0; } ret = intel_ddc_get_modes(output); if (ret) return ret; intel_i2c_destroy(intel_output->ddc_bus); /* Didn't get an EDID */ if (!output->monitor_info) { struct detailed_data_monitor_range *edid_range; edid_info = kzalloc(sizeof(*output->monitor_info), GFP_KERNEL); if (!edid_info) goto out; edid_info->detailed_timings[0].data.other_data.type = EDID_DETAIL_MONITOR_RANGE; edid_range = &edid_info->detailed_timings[0].data.other_data.data.range; /* Set wide sync ranges so we get all modes * handed to valid_mode for checking */ edid_range->min_vfreq = 0; edid_range->max_vfreq = 200; edid_range->min_hfreq_khz = 0; edid_range->max_hfreq_khz = 200; output->monitor_info = edid_info; } out: if (dev_priv->panel_fixed_mode != NULL) { struct drm_display_mode *mode = drm_mode_duplicate(dev, dev_priv->panel_fixed_mode); drm_mode_probed_add(output, mode); return 1; } return 0; } static void intel_lvds_destroy(struct drm_output *output) { if (output->driver_private) kfree(output->driver_private); } static const struct drm_output_funcs intel_lvds_output_funcs = { .dpms = intel_lvds_dpms, .save = intel_lvds_save, .restore = intel_lvds_restore, .mode_valid = intel_lvds_mode_valid, .mode_fixup = intel_lvds_mode_fixup, .prepare = intel_output_prepare, .mode_set = intel_lvds_mode_set, .commit = intel_output_commit, .detect = intel_lvds_detect, .get_modes = intel_lvds_get_modes, .cleanup = intel_lvds_destroy }; /** * intel_lvds_init - setup LVDS outputs on this device * @dev: drm device * * Create the output, register the LVDS DDC bus, and try to figure out what * modes we can display on the LVDS panel (if present). */ void intel_lvds_init(struct drm_device *dev) { drm_i915_private_t *dev_priv = dev->dev_private; struct drm_output *output; struct intel_output *intel_output; struct drm_display_mode *scan; /* *modes, *bios_mode; */ output = drm_output_create(dev, &intel_lvds_output_funcs, "LVDS"); if (!output) return; intel_output = kmalloc(sizeof(struct intel_output), GFP_KERNEL); if (!intel_output) { drm_output_destroy(output); return; } intel_output->type = INTEL_OUTPUT_LVDS; output->driver_private = intel_output; output->subpixel_order = SubPixelHorizontalRGB; output->interlace_allowed = FALSE; output->doublescan_allowed = FALSE; /* Set up the DDC bus. */ intel_output->ddc_bus = intel_i2c_create(dev, GPIOC, "LVDSDDC_C"); if (!intel_output->ddc_bus) { dev_printk(KERN_ERR, &dev->pdev->dev, "DDC bus registration " "failed.\n"); return; } /* * Attempt to get the fixed panel mode from DDC. Assume that the * preferred mode is the right one. */ intel_ddc_get_modes(output); intel_i2c_destroy(intel_output->ddc_bus); list_for_each_entry(scan, &output->probed_modes, head) { if (scan->type & DRM_MODE_TYPE_PREFERRED) break; } if (scan) { dev_priv->panel_fixed_mode = scan; DRM_DEBUG("LVDS panel_fixed: %s\n", scan->name); } #if 0 /* * If we didn't get EDID, try checking if the panel is already turned * on. If so, assume that whatever is currently programmed is the * correct mode. */ if (!dev_priv->panel_fixed_mode) { u32 lvds = I915_READ(LVDS); int pipe = (lvds & LVDS_PIPEB_SELECT) ? 1 : 0; struct drm_mode_config *mode_config = &dev->mode_config; struct drm_crtc *crtc; /* FIXME: need drm_crtc_from_pipe */ //crtc = drm_crtc_from_pipe(mode_config, pipe); if (lvds & LVDS_PORT_EN && 0) { dev_priv->panel_fixed_mode = intel_crtc_mode_get(dev, crtc); if (dev_priv->panel_fixed_mode) dev_priv->panel_fixed_mode->type |= DRM_MODE_TYPE_PREFERRED; } } /* No BIOS poking yet... */ /* Get the LVDS fixed mode out of the BIOS. We should support LVDS * with the BIOS being unavailable or broken, but lack the * configuration options for now. */ bios_mode = intel_bios_get_panel_mode(pScrn); if (bios_mode != NULL) { if (dev_priv->panel_fixed_mode != NULL) { if (dev_priv->debug_modes && !xf86ModesEqual(dev_priv->panel_fixed_mode, bios_mode)) { xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "BIOS panel mode data doesn't match probed data, " "continuing with probed.\n"); xf86DrvMsg(pScrn->scrnIndex, X_INFO, "BIOS mode:\n"); xf86PrintModeline(pScrn->scrnIndex, bios_mode); xf86DrvMsg(pScrn->scrnIndex, X_INFO, "probed mode:\n"); xf86PrintModeline(pScrn->scrnIndex, dev_priv->panel_fixed_mode); xfree(bios_mode->name); xfree(bios_mode); } } else { dev_priv->panel_fixed_mode = bios_mode; } } else { xf86DrvMsg(pScrn->scrnIndex, X_WARNING, "Couldn't detect panel mode. Disabling panel\n"); goto disable_exit; } /* Blacklist machines with BIOSes that list an LVDS panel without actually * having one. */ if (dev_priv->PciInfo->chipType == PCI_CHIP_I945_GM) { if (dev_priv->PciInfo->subsysVendor == 0xa0a0) /* aopen mini pc */ goto disable_exit; if ((dev_priv->PciInfo->subsysVendor == 0x8086) && (dev_priv->PciInfo->subsysCard == 0x7270)) { /* It's a Mac Mini or Macbook Pro. * * Apple hardware is out to get us. The macbook pro has a real * LVDS panel, but the mac mini does not, and they have the same * device IDs. We'll distinguish by panel size, on the assumption * that Apple isn't about to make any machines with an 800x600 * display. */ if (dev_priv->panel_fixed_mode != NULL && dev_priv->panel_fixed_mode->HDisplay == 800 && dev_priv->panel_fixed_mode->VDisplay == 600) { xf86DrvMsg(pScrn->scrnIndex, X_INFO, "Suspected Mac Mini, ignoring the LVDS\n"); goto disable_exit; } } } #endif return; } '>338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 
/**
 * \file drm_proc.c
 * /proc support for DRM
 *
 * \author Rickard E. (Rik) Faith <faith@valinux.com>
 * \author Gareth Hughes <gareth@valinux.com>
 *
 * \par Acknowledgements:
 *    Matthew J Sottek <matthew.j.sottek@intel.com> sent in a patch to fix
 *    the problem with the proc files not outputting all their information.
 */

/*
 * Created: Mon Jan 11 09:48:47 1999 by faith@valinux.com
 *
 * Copyright 1999 Precision Insight, Inc., Cedar Park, Texas.
 * Copyright 2000 VA Linux Systems, Inc., Sunnyvale, California.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
 * OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"

static int drm_name_info(char *buf, char **start, off_t offset,
			 int request, int *eof, void *data);
static int drm_vm_info(char *buf, char **start, off_t offset,
		       int request, int *eof, void *data);
static int drm_clients_info(char *buf, char **start, off_t offset,
			    int request, int *eof, void *data);
static int drm_queues_info(char *buf, char **start, off_t offset,
			   int request, int *eof, void *data);
static int drm_bufs_info(char *buf, char **start, off_t offset,
			 int request, int *eof, void *data);
static int drm_gem_name_info(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data);
static int drm_gem_object_info(char *buf, char **start, off_t offset,
			       int request, int *eof, void *data);
#if DRM_DEBUG_CODE
static int drm_vma_info(char *buf, char **start, off_t offset,
			int request, int *eof, void *data);
#endif

/**
 * Proc file list.
 */
static struct drm_proc_list {
	const char *name;	/**< file name */
	int (*f) (char *, char **, off_t, int, int *, void *);		/**< proc callback*/
} drm_proc_list[] = {
	{"name", drm_name_info},
	{"mem", drm_mem_info},
	{"vm", drm_vm_info},
	{"clients", drm_clients_info},
	{"queues", drm_queues_info},
	{"bufs", drm_bufs_info},
	{"gem_names", drm_gem_name_info},
	{"gem_objects", drm_gem_object_info},
#if DRM_DEBUG_CODE
	{"vma", drm_vma_info},
#endif
};

#define DRM_PROC_ENTRIES ARRAY_SIZE(drm_proc_list)

/**
 * Initialize the DRI proc filesystem for a device.
 *
 * \param dev DRM device.
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root resulting DRI device proc dir entry.
 * \return root entry pointer on success, or NULL on failure.
 *
 * Create the DRI proc root entry "/proc/dri", the device proc root entry
 * "/proc/dri/%minor%/", and each entry in proc_list as
 * "/proc/dri/%minor%/%name%".
 */
int drm_proc_init(struct drm_minor *minor, int minor_id,
		  struct proc_dir_entry *root)
{
	struct proc_dir_entry *ent;
	int i, j;
	char name[64];

	sprintf(name, "%d", minor_id);
	minor->dev_root = proc_mkdir(name, root);
	if (!minor->dev_root) {
		DRM_ERROR("Cannot create /proc/dri/%s\n", name);
		return -1;
	}

	for (i = 0; i < DRM_PROC_ENTRIES; i++) {
		ent = create_proc_entry(drm_proc_list[i].name,
					S_IFREG | S_IRUGO, minor->dev_root);
		if (!ent) {
			DRM_ERROR("Cannot create /proc/dri/%s/%s\n",
				  name, drm_proc_list[i].name);
			for (j = 0; j < i; j++)
				remove_proc_entry(drm_proc_list[i].name,
						  minor->dev_root);
			remove_proc_entry(name, root);
			minor->dev_root = NULL;
			return -1;
		}
		ent->read_proc = drm_proc_list[i].f;
		ent->data = minor;
	}
	return 0;
}

/**
 * Cleanup the proc filesystem resources.
 *
 * \param minor device minor number.
 * \param root DRI proc dir entry.
 * \param dev_root DRI device proc dir entry.
 * \return always zero.
 *
 * Remove all proc entries created by proc_init().
 */
int drm_proc_cleanup(struct drm_minor *minor, struct proc_dir_entry *root)
{
	int i;
	char name[64];

	if (!root || !minor->dev_root)
		return 0;

	for (i = 0; i < DRM_PROC_ENTRIES; i++)
		remove_proc_entry(drm_proc_list[i].name, minor->dev_root);
	sprintf(name, "%d", minor->index);
	remove_proc_entry(name, root);

	return 0;
}

/**
 * Called when "/proc/dri/.../name" is read.
 *
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 *
 * Prints the device name together with the bus id if available.
 */
static int drm_name_info(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int len = 0;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof = 0;

	if (dev->unique) {
		DRM_PROC_PRINT("%s %s %s\n",
			       dev->driver->pci_driver.name,
			       pci_name(dev->pdev), dev->unique);
	} else {
		DRM_PROC_PRINT("%s %s\n", dev->driver->pci_driver.name,
			       pci_name(dev->pdev));
	}

	if (len > request + offset)
		return request;
	*eof = 1;
	return len - offset;
}

/**
 * Called when "/proc/dri/.../vm" is read.
 *
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 *
 * Prints information about all mappings in drm_device::maplist.
 */
static int drm__vm_info(char *buf, char **start, off_t offset, int request,
			int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int len = 0;
	struct drm_map *map;
	struct drm_map_list *r_list;

	/* Hardcoded from _DRM_FRAME_BUFFER,
	   _DRM_REGISTERS, _DRM_SHM, _DRM_AGP,
	   _DRM_SCATTER_GATHER, and _DRM_CONSISTENT. */
	const char *types[] = { "FB", "REG", "SHM", "AGP", "SG", "PCI" };
	const char *type;
	int i;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof = 0;

	DRM_PROC_PRINT("slot	 offset	      size type flags	 "
		       "address mtrr\n\n");
	i = 0;
	list_for_each_entry(r_list, &dev->maplist, head) {
		map = r_list->map;
		if (!map)
			continue;
		if (map->type < 0 || map->type > 5)
			type = "??";
		else
			type = types[map->type];
		DRM_PROC_PRINT("%4d 0x%08lx 0x%08lx %4.4s  0x%02x 0x%08lx ",
			       i,
			       map->offset,
			       map->size, type, map->flags,
			       (unsigned long) r_list->user_token);

		if (map->mtrr < 0) {
			DRM_PROC_PRINT("none\n");
		} else {
			DRM_PROC_PRINT("%4d\n", map->mtrr);
		}
		i++;
	}

	if (len > request + offset)
		return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _vm_info() while holding the drm_device::struct_mutex lock.
 */
static int drm_vm_info(char *buf, char **start, off_t offset, int request,
		       int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int ret;

	mutex_lock(&dev->struct_mutex);
	ret = drm__vm_info(buf, start, offset, request, eof, data);
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

/**
 * Called when "/proc/dri/.../queues" is read.
 *
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__queues_info(char *buf, char **start, off_t offset,
			    int request, int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int len = 0;
	int i;
	struct drm_queue *q;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof = 0;

	DRM_PROC_PRINT("  ctx/flags   use   fin"
		       "   blk/rw/rwf  wait    flushed	   queued"
		       "      locks\n\n");
	for (i = 0; i < dev->queue_count; i++) {
		q = dev->queuelist[i];
		atomic_inc(&q->use_count);
		DRM_PROC_PRINT_RET(atomic_dec(&q->use_count),
				   "%5d/0x%03x %5d %5d"
				   " %5d/%c%c/%c%c%c %5Zd\n",
				   i,
				   q->flags,
				   atomic_read(&q->use_count),
				   atomic_read(&q->finalization),
				   atomic_read(&q->block_count),
				   atomic_read(&q->block_read) ? 'r' : '-',
				   atomic_read(&q->block_write) ? 'w' : '-',
				   waitqueue_active(&q->read_queue) ? 'r' : '-',
				   waitqueue_active(&q->
						    write_queue) ? 'w' : '-',
				   waitqueue_active(&q->
						    flush_queue) ? 'f' : '-',
				   DRM_BUFCOUNT(&q->waitlist));
		atomic_dec(&q->use_count);
	}

	if (len > request + offset)
		return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _queues_info() while holding the drm_device::struct_mutex lock.
 */
static int drm_queues_info(char *buf, char **start, off_t offset, int request,
			   int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int ret;

	mutex_lock(&dev->struct_mutex);
	ret = drm__queues_info(buf, start, offset, request, eof, data);
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

/**
 * Called when "/proc/dri/.../bufs" is read.
 *
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__bufs_info(char *buf, char **start, off_t offset, int request,
			  int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int len = 0;
	struct drm_device_dma *dma = dev->dma;
	int i;

	if (!dma || offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof = 0;

	DRM_PROC_PRINT(" o     size count  free	 segs pages    kB\n\n");
	for (i = 0; i <= DRM_MAX_ORDER; i++) {
		if (dma->bufs[i].buf_count)
			DRM_PROC_PRINT("%2d %8d %5d %5d %5d %5d %5ld\n",
				       i,
				       dma->bufs[i].buf_size,
				       dma->bufs[i].buf_count,
				       atomic_read(&dma->bufs[i]
						   .freelist.count),
				       dma->bufs[i].seg_count,
				       dma->bufs[i].seg_count
				       * (1 << dma->bufs[i].page_order),
				       (dma->bufs[i].seg_count
					* (1 << dma->bufs[i].page_order))
				       * PAGE_SIZE / 1024);
	}
	DRM_PROC_PRINT("\n");
	for (i = 0; i < dma->buf_count; i++) {
		if (i && !(i % 32))
			DRM_PROC_PRINT("\n");
		DRM_PROC_PRINT(" %d", dma->buflist[i]->list);
	}
	DRM_PROC_PRINT("\n");

	if (len > request + offset)
		return request;
	*eof = 1;
	return len - offset;
}

/**
 * Simply calls _bufs_info() while holding the drm_device::struct_mutex lock.
 */
static int drm_bufs_info(char *buf, char **start, off_t offset, int request,
			 int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int ret;

	mutex_lock(&dev->struct_mutex);
	ret = drm__bufs_info(buf, start, offset, request, eof, data);
	mutex_unlock(&dev->struct_mutex);
	return ret;
}

/**
 * Called when "/proc/dri/.../clients" is read.
 *
 * \param buf output buffer.
 * \param start start of output data.
 * \param offset requested start offset.
 * \param request requested number of bytes.
 * \param eof whether there is no more data to return.
 * \param data private data.
 * \return number of written bytes.
 */
static int drm__clients_info(char *buf, char **start, off_t offset,
			     int request, int *eof, void *data)
{
	struct drm_minor *minor = (struct drm_minor *) data; 
	struct drm_device *dev = minor->dev;
	int len = 0;
	struct drm_file *priv;

	if (offset > DRM_PROC_LIMIT) {
		*eof = 1;
		return 0;
	}

	*start = &buf[offset];
	*eof = 0;