drivers/gpu/drm/radeon/radeon_kms.c - kernel/bruno - Git at Google

 /*
  * Copyright 2008 Advanced Micro Devices, Inc.
  * Copyright 2008 Red Hat Inc.
  * Copyright 2009 Jerome Glisse.
  *
  * 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
  *          Alex Deucher
  *          Jerome Glisse
  */
 #include "drmP.h"
 #include "drm_sarea.h"
 #include "radeon.h"
 #include "radeon_drm.h"

 #include <linux/vga_switcheroo.h>
 #include <linux/slab.h>

 int radeon_driver_unload_kms(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;

 	if (rdev == NULL)
 		return 0;
 	radeon_modeset_fini(rdev);
 	radeon_device_fini(rdev);
 	kfree(rdev);
 	dev->dev_private = NULL;
 	return 0;
 }

 int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
 {
 	struct radeon_device *rdev;
 	int r, acpi_status;

 	rdev = kzalloc(sizeof(struct radeon_device), GFP_KERNEL);
 	if (rdev == NULL) {
 		return -ENOMEM;
 	}
 	dev->dev_private = (void *)rdev;

 	/* update BUS flag */
 	if (drm_device_is_agp(dev)) {
 		flags |= RADEON_IS_AGP;
 	} else if (drm_device_is_pcie(dev)) {
 		flags |= RADEON_IS_PCIE;
 	} else {
 		flags |= RADEON_IS_PCI;
 	}

 	/* radeon_device_init should report only fatal error
 	 * like memory allocation failure or iomapping failure,
 	 * or memory manager initialization failure, it must
 	 * properly initialize the GPU MC controller and permit
 	 * VRAM allocation
 	 */
 	r = radeon_device_init(rdev, dev, dev->pdev, flags);
 	if (r) {
 		dev_err(&dev->pdev->dev, "Fatal error during GPU init\n");
 		goto out;
 	}

 	/* Call ACPI methods */
 	acpi_status = radeon_acpi_init(rdev);
 	if (acpi_status)
 		dev_dbg(&dev->pdev->dev, "Error during ACPI methods call\n");

 	/* Again modeset_init should fail only on fatal error
 	 * otherwise it should provide enough functionalities
 	 * for shadowfb to run
 	 */
 	r = radeon_modeset_init(rdev);
 	if (r)
 		dev_err(&dev->pdev->dev, "Fatal error during modeset init\n");
 out:
 	if (r)
 		radeon_driver_unload_kms(dev);
 	return r;
 }


 /*
  * Userspace get informations ioctl
  */
 int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	struct drm_radeon_info *info;
 	struct radeon_mode_info *minfo = &rdev->mode_info;
 	uint32_t *value_ptr;
 	uint32_t value;
 	struct drm_crtc *crtc;
 	int i, found;

 	info = data;
 	value_ptr = (uint32_t *)((unsigned long)info->value);
 	if (DRM_COPY_FROM_USER(&value, value_ptr, sizeof(value)))
 		return -EFAULT;

 	switch (info->request) {
 	case RADEON_INFO_DEVICE_ID:
 		value = dev->pci_device;
 		break;
 	case RADEON_INFO_NUM_GB_PIPES:
 		value = rdev->num_gb_pipes;
 		break;
 	case RADEON_INFO_NUM_Z_PIPES:
 		value = rdev->num_z_pipes;
 		break;
 	case RADEON_INFO_ACCEL_WORKING:
 		/* xf86-video-ati 6.13.0 relies on this being false for evergreen */
 		if ((rdev->family >= CHIP_CEDAR) && (rdev->family <= CHIP_HEMLOCK))
 			value = false;
 		else
 			value = rdev->accel_working;
 		break;
 	case RADEON_INFO_CRTC_FROM_ID:
 		for (i = 0, found = 0; i < rdev->num_crtc; i++) {
 			crtc = (struct drm_crtc *)minfo->crtcs[i];
 			if (crtc && crtc->base.id == value) {
 				struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
 				value = radeon_crtc->crtc_id;
 				found = 1;
 				break;
 			}
 		}
 		if (!found) {
 			DRM_DEBUG_KMS("unknown crtc id %d\n", value);
 			return -EINVAL;
 		}
 		break;
 	case RADEON_INFO_ACCEL_WORKING2:
 		value = rdev->accel_working;
 		break;
 	case RADEON_INFO_TILING_CONFIG:
 		if (rdev->family >= CHIP_CEDAR)
 			value = rdev->config.evergreen.tile_config;
 		else if (rdev->family >= CHIP_RV770)
 			value = rdev->config.rv770.tile_config;
 		else if (rdev->family >= CHIP_R600)
 			value = rdev->config.r600.tile_config;
 		else {
 			DRM_DEBUG_KMS("tiling config is r6xx+ only!\n");
 			return -EINVAL;
 		}
 		break;
 	case RADEON_INFO_WANT_HYPERZ:
 		/* The "value" here is both an input and output parameter.
 		 * If the input value is 1, filp requests hyper-z access.
 		 * If the input value is 0, filp revokes its hyper-z access.
 		 *
 		 * When returning, the value is 1 if filp owns hyper-z access,
 		 * 0 otherwise. */
 		if (value >= 2) {
 			DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);
 			return -EINVAL;
 		}
 		mutex_lock(&dev->struct_mutex);
 		if (value == 1) {
 			/* wants hyper-z */
 			if (!rdev->hyperz_filp)
 				rdev->hyperz_filp = filp;
 		} else if (value == 0) {
 			/* revokes hyper-z */
 			if (rdev->hyperz_filp == filp)
 				rdev->hyperz_filp = NULL;
 		}
 		value = rdev->hyperz_filp == filp ?  1 : 0;
 		mutex_unlock(&dev->struct_mutex);
 		break;
 	default:
 		DRM_DEBUG_KMS("Invalid request %d\n", info->request);
 		return -EINVAL;
 	}
 	if (DRM_COPY_TO_USER(value_ptr, &value, sizeof(uint32_t))) {
 		DRM_ERROR("copy_to_user\n");
 		return -EFAULT;
 	}
 	return 0;
 }


 /*
  * Outdated mess for old drm with Xorg being in charge (void function now).
  */
 int radeon_driver_firstopen_kms(struct drm_device *dev)
 {
 	struct radeon_device *rdev = dev->dev_private;

 	if (rdev->powered_down)
 		return -EINVAL;
 	return 0;
 }


 void radeon_driver_lastclose_kms(struct drm_device *dev)
 {
 	vga_switcheroo_process_delayed_switch();
 }

 int radeon_driver_open_kms(struct drm_device *dev, struct drm_file *file_priv)
 {
 	return 0;
 }

 void radeon_driver_postclose_kms(struct drm_device *dev,
 				 struct drm_file *file_priv)
 {
 }

 void radeon_driver_preclose_kms(struct drm_device *dev,
 				struct drm_file *file_priv)
 {
 	struct radeon_device *rdev = dev->dev_private;
 	if (rdev->hyperz_filp == file_priv)
 		rdev->hyperz_filp = NULL;
 }

 /*
  * VBlank related functions.
  */
 u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
 {
 	struct radeon_device *rdev = dev->dev_private;

 	if (crtc < 0 || crtc >= rdev->num_crtc) {
 		DRM_ERROR("Invalid crtc %d\n", crtc);
 		return -EINVAL;
 	}

 	return radeon_get_vblank_counter(rdev, crtc);
 }

 int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
 {
 	struct radeon_device *rdev = dev->dev_private;

 	if (crtc < 0 || crtc >= rdev->num_crtc) {
 		DRM_ERROR("Invalid crtc %d\n", crtc);
 		return -EINVAL;
 	}

 	rdev->irq.crtc_vblank_int[crtc] = true;

 	return radeon_irq_set(rdev);
 }

 void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
 {
 	struct radeon_device *rdev = dev->dev_private;

 	if (crtc < 0 || crtc >= rdev->num_crtc) {
 		DRM_ERROR("Invalid crtc %d\n", crtc);
 		return;
 	}

 	rdev->irq.crtc_vblank_int[crtc] = false;

 	radeon_irq_set(rdev);
 }


 /*
  * IOCTL.
  */
 int radeon_dma_ioctl_kms(struct drm_device *dev, void *data,
 			 struct drm_file *file_priv)
 {
 	/* Not valid in KMS. */
 	return -EINVAL;
 }

 #define KMS_INVALID_IOCTL(name)						\
 int name(struct drm_device *dev, void *data, struct drm_file *file_priv)\
 {									\
 	DRM_ERROR("invalid ioctl with kms %s\n", __func__);		\
 	return -EINVAL;							\
 }

 /*
  * All these ioctls are invalid in kms world.
  */
 KMS_INVALID_IOCTL(radeon_cp_init_kms)
 KMS_INVALID_IOCTL(radeon_cp_start_kms)
 KMS_INVALID_IOCTL(radeon_cp_stop_kms)
 KMS_INVALID_IOCTL(radeon_cp_reset_kms)
 KMS_INVALID_IOCTL(radeon_cp_idle_kms)
 KMS_INVALID_IOCTL(radeon_cp_resume_kms)
 KMS_INVALID_IOCTL(radeon_engine_reset_kms)
 KMS_INVALID_IOCTL(radeon_fullscreen_kms)
 KMS_INVALID_IOCTL(radeon_cp_swap_kms)
 KMS_INVALID_IOCTL(radeon_cp_clear_kms)
 KMS_INVALID_IOCTL(radeon_cp_vertex_kms)
 KMS_INVALID_IOCTL(radeon_cp_indices_kms)
 KMS_INVALID_IOCTL(radeon_cp_texture_kms)
 KMS_INVALID_IOCTL(radeon_cp_stipple_kms)
 KMS_INVALID_IOCTL(radeon_cp_indirect_kms)
 KMS_INVALID_IOCTL(radeon_cp_vertex2_kms)
 KMS_INVALID_IOCTL(radeon_cp_cmdbuf_kms)
 KMS_INVALID_IOCTL(radeon_cp_getparam_kms)
 KMS_INVALID_IOCTL(radeon_cp_flip_kms)
 KMS_INVALID_IOCTL(radeon_mem_alloc_kms)
 KMS_INVALID_IOCTL(radeon_mem_free_kms)
 KMS_INVALID_IOCTL(radeon_mem_init_heap_kms)
 KMS_INVALID_IOCTL(radeon_irq_emit_kms)
 KMS_INVALID_IOCTL(radeon_irq_wait_kms)
 KMS_INVALID_IOCTL(radeon_cp_setparam_kms)
 KMS_INVALID_IOCTL(radeon_surface_alloc_kms)
 KMS_INVALID_IOCTL(radeon_surface_free_kms)


 struct drm_ioctl_desc radeon_ioctls_kms[] = {
 	DRM_IOCTL_DEF_DRV(RADEON_CP_INIT, radeon_cp_init_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_CP_START, radeon_cp_start_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_CP_STOP, radeon_cp_stop_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_CP_RESET, radeon_cp_reset_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_CP_IDLE, radeon_cp_idle_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_CP_RESUME, radeon_cp_resume_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_RESET, radeon_engine_reset_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_FULLSCREEN, radeon_fullscreen_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_SWAP, radeon_cp_swap_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_CLEAR, radeon_cp_clear_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_VERTEX, radeon_cp_vertex_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_INDICES, radeon_cp_indices_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_TEXTURE, radeon_cp_texture_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_STIPPLE, radeon_cp_stipple_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_INDIRECT, radeon_cp_indirect_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_VERTEX2, radeon_cp_vertex2_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_CMDBUF, radeon_cp_cmdbuf_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_GETPARAM, radeon_cp_getparam_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_FLIP, radeon_cp_flip_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_ALLOC, radeon_mem_alloc_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_FREE, radeon_mem_free_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_INIT_HEAP, radeon_mem_init_heap_kms, DRM_AUTH|DRM_MASTER|DRM_ROOT_ONLY),
 	DRM_IOCTL_DEF_DRV(RADEON_IRQ_EMIT, radeon_irq_emit_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_IRQ_WAIT, radeon_irq_wait_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_SETPARAM, radeon_cp_setparam_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_SURF_ALLOC, radeon_surface_alloc_kms, DRM_AUTH),
 	DRM_IOCTL_DEF_DRV(RADEON_SURF_FREE, radeon_surface_free_kms, DRM_AUTH),
 	/* KMS */
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_INFO, radeon_gem_info_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_CREATE, radeon_gem_create_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_MMAP, radeon_gem_mmap_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_SET_DOMAIN, radeon_gem_set_domain_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_PREAD, radeon_gem_pread_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_PWRITE, radeon_gem_pwrite_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_WAIT_IDLE, radeon_gem_wait_idle_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_CS, radeon_cs_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_INFO, radeon_info_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_SET_TILING, radeon_gem_set_tiling_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_GET_TILING, radeon_gem_get_tiling_ioctl, DRM_AUTH|DRM_UNLOCKED),
 	DRM_IOCTL_DEF_DRV(RADEON_GEM_BUSY, radeon_gem_busy_ioctl, DRM_AUTH|DRM_UNLOCKED),
 };
 int radeon_max_kms_ioctl = DRM_ARRAY_SIZE(radeon_ioctls_kms);
	/*
	* Copyright 2008 Advanced Micro Devices, Inc.
	* Copyright 2008 Red Hat Inc.
	* Copyright 2009 Jerome Glisse.
	*
	* 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 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) 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: Dave Airlie
	* Alex Deucher
	* Jerome Glisse
	*/
	#include "drmP.h"
	#include "drm_sarea.h"
	#include "radeon.h"
	#include "radeon_drm.h"

	#include <linux/vga_switcheroo.h>
	#include <linux/slab.h>

	int radeon_driver_unload_kms(struct drm_device *dev)
	{
	struct radeon_device *rdev = dev->dev_private;

	if (rdev == NULL)
	return 0;
	radeon_modeset_fini(rdev);
	radeon_device_fini(rdev);
	kfree(rdev);
	dev->dev_private = NULL;
	return 0;
	}

	int radeon_driver_load_kms(struct drm_device *dev, unsigned long flags)
	{
	struct radeon_device *rdev;
	int r, acpi_status;

	rdev = kzalloc(sizeof(struct radeon_device), GFP_KERNEL);
	if (rdev == NULL) {
	return -ENOMEM;
	}
	dev->dev_private = (void *)rdev;

	/* update BUS flag */
	if (drm_device_is_agp(dev)) {
	flags \|= RADEON_IS_AGP;
	} else if (drm_device_is_pcie(dev)) {
	flags \|= RADEON_IS_PCIE;
	} else {
	flags \|= RADEON_IS_PCI;
	}

	/* radeon_device_init should report only fatal error
	* like memory allocation failure or iomapping failure,
	* or memory manager initialization failure, it must
	* properly initialize the GPU MC controller and permit
	* VRAM allocation
	*/
	r = radeon_device_init(rdev, dev, dev->pdev, flags);
	if (r) {
	dev_err(&dev->pdev->dev, "Fatal error during GPU init\n");
	goto out;
	}

	/* Call ACPI methods */
	acpi_status = radeon_acpi_init(rdev);
	if (acpi_status)
	dev_dbg(&dev->pdev->dev, "Error during ACPI methods call\n");

	/* Again modeset_init should fail only on fatal error
	* otherwise it should provide enough functionalities
	* for shadowfb to run
	*/
	r = radeon_modeset_init(rdev);
	if (r)
	dev_err(&dev->pdev->dev, "Fatal error during modeset init\n");
	out:
	if (r)
	radeon_driver_unload_kms(dev);
	return r;
	}


	/*
	* Userspace get informations ioctl
	*/
	int radeon_info_ioctl(struct drm_device dev, void data, struct drm_file *filp)
	{
	struct radeon_device *rdev = dev->dev_private;
	struct drm_radeon_info *info;
	struct radeon_mode_info *minfo = &rdev->mode_info;
	uint32_t *value_ptr;
	uint32_t value;
	struct drm_crtc *crtc;
	int i, found;

	info = data;
	value_ptr = (uint32_t *)((unsigned long)info->value);
	if (DRM_COPY_FROM_USER(&value, value_ptr, sizeof(value)))
	return -EFAULT;

	switch (info->request) {
	case RADEON_INFO_DEVICE_ID:
	value = dev->pci_device;
	break;
	case RADEON_INFO_NUM_GB_PIPES:
	value = rdev->num_gb_pipes;
	break;
	case RADEON_INFO_NUM_Z_PIPES:
	value = rdev->num_z_pipes;
	break;
	case RADEON_INFO_ACCEL_WORKING:
	/* xf86-video-ati 6.13.0 relies on this being false for evergreen */
	if ((rdev->family >= CHIP_CEDAR) && (rdev->family <= CHIP_HEMLOCK))
	value = false;
	else
	value = rdev->accel_working;
	break;
	case RADEON_INFO_CRTC_FROM_ID:
	for (i = 0, found = 0; i < rdev->num_crtc; i++) {
	crtc = (struct drm_crtc *)minfo->crtcs[i];
	if (crtc && crtc->base.id == value) {
	struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
	value = radeon_crtc->crtc_id;
	found = 1;
	break;
	}
	}
	if (!found) {
	DRM_DEBUG_KMS("unknown crtc id %d\n", value);
	return -EINVAL;
	}
	break;
	case RADEON_INFO_ACCEL_WORKING2:
	value = rdev->accel_working;
	break;
	case RADEON_INFO_TILING_CONFIG:
	if (rdev->family >= CHIP_CEDAR)
	value = rdev->config.evergreen.tile_config;
	else if (rdev->family >= CHIP_RV770)
	value = rdev->config.rv770.tile_config;
	else if (rdev->family >= CHIP_R600)
	value = rdev->config.r600.tile_config;
	else {
	DRM_DEBUG_KMS("tiling config is r6xx+ only!\n");
	return -EINVAL;
	}
	break;
	case RADEON_INFO_WANT_HYPERZ:
	/* The "value" here is both an input and output parameter.
	* If the input value is 1, filp requests hyper-z access.
	* If the input value is 0, filp revokes its hyper-z access.
	*
	* When returning, the value is 1 if filp owns hyper-z access,
	* 0 otherwise. */
	if (value >= 2) {
	DRM_DEBUG_KMS("WANT_HYPERZ: invalid value %d\n", value);
	return -EINVAL;
	}
	mutex_lock(&dev->struct_mutex);
	if (value == 1) {
	/* wants hyper-z */
	if (!rdev->hyperz_filp)
	rdev->hyperz_filp = filp;
	} else if (value == 0) {
	/* revokes hyper-z */
	if (rdev->hyperz_filp == filp)
	rdev->hyperz_filp = NULL;
	}
	value = rdev->hyperz_filp == filp ? 1 : 0;
	mutex_unlock(&dev->struct_mutex);
	break;
	default:
	DRM_DEBUG_KMS("Invalid request %d\n", info->request);
	return -EINVAL;
	}
	if (DRM_COPY_TO_USER(value_ptr, &value, sizeof(uint32_t))) {
	DRM_ERROR("copy_to_user\n");
	return -EFAULT;
	}
	return 0;
	}


	/*
	* Outdated mess for old drm with Xorg being in charge (void function now).
	*/
	int radeon_driver_firstopen_kms(struct drm_device *dev)
	{
	struct radeon_device *rdev = dev->dev_private;

	if (rdev->powered_down)
	return -EINVAL;
	return 0;
	}


	void radeon_driver_lastclose_kms(struct drm_device *dev)
	{
	vga_switcheroo_process_delayed_switch();
	}

	int radeon_driver_open_kms(struct drm_device dev, struct drm_file file_priv)
	{
	return 0;
	}

	void radeon_driver_postclose_kms(struct drm_device *dev,
	struct drm_file *file_priv)
	{
	}

	void radeon_driver_preclose_kms(struct drm_device *dev,
	struct drm_file *file_priv)
	{
	struct radeon_device *rdev = dev->dev_private;
	if (rdev->hyperz_filp == file_priv)
	rdev->hyperz_filp = NULL;
	}

	/*
	* VBlank related functions.
	*/
	u32 radeon_get_vblank_counter_kms(struct drm_device *dev, int crtc)
	{
	struct radeon_device *rdev = dev->dev_private;

	if (crtc < 0 \|\| crtc >= rdev->num_crtc) {
	DRM_ERROR("Invalid crtc %d\n", crtc);
	return -EINVAL;
	}

	return radeon_get_vblank_counter(rdev, crtc);
	}

	int radeon_enable_vblank_kms(struct drm_device *dev, int crtc)
	{
	struct radeon_device *rdev = dev->dev_private;

	if (crtc < 0 \|\| crtc >= rdev->num_crtc) {
	DRM_ERROR("Invalid crtc %d\n", crtc);
	return -EINVAL;
	}

	rdev->irq.crtc_vblank_int[crtc] = true;

	return radeon_irq_set(rdev);
	}

	void radeon_disable_vblank_kms(struct drm_device *dev, int crtc)
	{
	struct radeon_device *rdev = dev->dev_private;

	if (crtc < 0 \|\| crtc >= rdev->num_crtc) {
	DRM_ERROR("Invalid crtc %d\n", crtc);
	return;
	}

	rdev->irq.crtc_vblank_int[crtc] = false;

	radeon_irq_set(rdev);
	}


	/*
	* IOCTL.
	*/
	int radeon_dma_ioctl_kms(struct drm_device dev, void data,
	struct drm_file *file_priv)
	{
	/* Not valid in KMS. */
	return -EINVAL;
	}

	#define KMS_INVALID_IOCTL(name) \
	int name(struct drm_device dev, void data, struct drm_file *file_priv)\
	{ \
	DRM_ERROR("invalid ioctl with kms %s\n", __func__); \
	return -EINVAL; \
	}

	/*
	* All these ioctls are invalid in kms world.
	*/
	KMS_INVALID_IOCTL(radeon_cp_init_kms)
	KMS_INVALID_IOCTL(radeon_cp_start_kms)
	KMS_INVALID_IOCTL(radeon_cp_stop_kms)
	KMS_INVALID_IOCTL(radeon_cp_reset_kms)
	KMS_INVALID_IOCTL(radeon_cp_idle_kms)
	KMS_INVALID_IOCTL(radeon_cp_resume_kms)
	KMS_INVALID_IOCTL(radeon_engine_reset_kms)
	KMS_INVALID_IOCTL(radeon_fullscreen_kms)
	KMS_INVALID_IOCTL(radeon_cp_swap_kms)
	KMS_INVALID_IOCTL(radeon_cp_clear_kms)
	KMS_INVALID_IOCTL(radeon_cp_vertex_kms)
	KMS_INVALID_IOCTL(radeon_cp_indices_kms)
	KMS_INVALID_IOCTL(radeon_cp_texture_kms)
	KMS_INVALID_IOCTL(radeon_cp_stipple_kms)
	KMS_INVALID_IOCTL(radeon_cp_indirect_kms)
	KMS_INVALID_IOCTL(radeon_cp_vertex2_kms)
	KMS_INVALID_IOCTL(radeon_cp_cmdbuf_kms)
	KMS_INVALID_IOCTL(radeon_cp_getparam_kms)
	KMS_INVALID_IOCTL(radeon_cp_flip_kms)
	KMS_INVALID_IOCTL(radeon_mem_alloc_kms)
	KMS_INVALID_IOCTL(radeon_mem_free_kms)
	KMS_INVALID_IOCTL(radeon_mem_init_heap_kms)
	KMS_INVALID_IOCTL(radeon_irq_emit_kms)
	KMS_INVALID_IOCTL(radeon_irq_wait_kms)
	KMS_INVALID_IOCTL(radeon_cp_setparam_kms)
	KMS_INVALID_IOCTL(radeon_surface_alloc_kms)
	KMS_INVALID_IOCTL(radeon_surface_free_kms)


	struct drm_ioctl_desc radeon_ioctls_kms[] = {
	DRM_IOCTL_DEF_DRV(RADEON_CP_INIT, radeon_cp_init_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_CP_START, radeon_cp_start_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_CP_STOP, radeon_cp_stop_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_CP_RESET, radeon_cp_reset_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_CP_IDLE, radeon_cp_idle_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_CP_RESUME, radeon_cp_resume_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_RESET, radeon_engine_reset_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_FULLSCREEN, radeon_fullscreen_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_SWAP, radeon_cp_swap_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_CLEAR, radeon_cp_clear_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_VERTEX, radeon_cp_vertex_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_INDICES, radeon_cp_indices_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_TEXTURE, radeon_cp_texture_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_STIPPLE, radeon_cp_stipple_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_INDIRECT, radeon_cp_indirect_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_VERTEX2, radeon_cp_vertex2_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_CMDBUF, radeon_cp_cmdbuf_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_GETPARAM, radeon_cp_getparam_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_FLIP, radeon_cp_flip_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_ALLOC, radeon_mem_alloc_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_FREE, radeon_mem_free_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_INIT_HEAP, radeon_mem_init_heap_kms, DRM_AUTH\|DRM_MASTER\|DRM_ROOT_ONLY),
	DRM_IOCTL_DEF_DRV(RADEON_IRQ_EMIT, radeon_irq_emit_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_IRQ_WAIT, radeon_irq_wait_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_SETPARAM, radeon_cp_setparam_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_SURF_ALLOC, radeon_surface_alloc_kms, DRM_AUTH),
	DRM_IOCTL_DEF_DRV(RADEON_SURF_FREE, radeon_surface_free_kms, DRM_AUTH),
	/* KMS */
	DRM_IOCTL_DEF_DRV(RADEON_GEM_INFO, radeon_gem_info_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_CREATE, radeon_gem_create_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_MMAP, radeon_gem_mmap_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_SET_DOMAIN, radeon_gem_set_domain_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_PREAD, radeon_gem_pread_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_PWRITE, radeon_gem_pwrite_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_WAIT_IDLE, radeon_gem_wait_idle_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_CS, radeon_cs_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_INFO, radeon_info_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_SET_TILING, radeon_gem_set_tiling_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_GET_TILING, radeon_gem_get_tiling_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(RADEON_GEM_BUSY, radeon_gem_busy_ioctl, DRM_AUTH\|DRM_UNLOCKED),
	};
	int radeon_max_kms_ioctl = DRM_ARRAY_SIZE(radeon_ioctls_kms);