drivers/gpu/drm/nouveau/nouveau_display.c - kernel/msm-4.19 - Gitiles

 /*
  * Copyright (C) 2008 Maarten Maathuis.
  * 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 THE COPYRIGHT OWNER(S) 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 <drm/drmP.h>
 #include <drm/drm_crtc_helper.h>

 #include "nouveau_fbcon.h"
 #include "nouveau_hw.h"
 #include "nouveau_crtc.h"
 #include "nouveau_dma.h"
 #include "nouveau_gem.h"
 #include "nouveau_connector.h"
 #include "nv50_display.h"

 #include "nouveau_fence.h"

 #include <subdev/bios/gpio.h>
 #include <subdev/gpio.h>
 #include <engine/disp.h>

 #include <core/class.h>

 static void
 nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
 {
 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);

 	if (fb->nvbo)
 		drm_gem_object_unreference_unlocked(fb->nvbo->gem);

 	drm_framebuffer_cleanup(drm_fb);
 	kfree(fb);
 }

 static int
 nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
 				       struct drm_file *file_priv,
 				       unsigned int *handle)
 {
 	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);

 	return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
 }

 static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
 	.destroy = nouveau_user_framebuffer_destroy,
 	.create_handle = nouveau_user_framebuffer_create_handle,
 };

 int
 nouveau_framebuffer_init(struct drm_device *dev,
 			 struct nouveau_framebuffer *nv_fb,
 			 struct drm_mode_fb_cmd2 *mode_cmd,
 			 struct nouveau_bo *nvbo)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct drm_framebuffer *fb = &nv_fb->base;
 	int ret;

 	ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
 	if (ret) {
 		return ret;
 	}

 	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
 	nv_fb->nvbo = nvbo;

 	if (nv_device(drm->device)->card_type >= NV_50) {
 		u32 tile_flags = nouveau_bo_tile_layout(nvbo);
 		if (tile_flags == 0x7a00 ||
 		    tile_flags == 0xfe00)
 			nv_fb->r_dma = NvEvoFB32;
 		else
 		if (tile_flags == 0x7000)
 			nv_fb->r_dma = NvEvoFB16;
 		else
 			nv_fb->r_dma = NvEvoVRAM_LP;

 		switch (fb->depth) {
 		case  8: nv_fb->r_format = 0x1e00; break;
 		case 15: nv_fb->r_format = 0xe900; break;
 		case 16: nv_fb->r_format = 0xe800; break;
 		case 24:
 		case 32: nv_fb->r_format = 0xcf00; break;
 		case 30: nv_fb->r_format = 0xd100; break;
 		default:
 			 NV_ERROR(drm, "unknown depth %d\n", fb->depth);
 			 return -EINVAL;
 		}

 		if (nv_device(drm->device)->chipset == 0x50)
 			nv_fb->r_format |= (tile_flags << 8);

 		if (!tile_flags) {
 			if (nv_device(drm->device)->card_type < NV_D0)
 				nv_fb->r_pitch = 0x00100000 | fb->pitches[0];
 			else
 				nv_fb->r_pitch = 0x01000000 | fb->pitches[0];
 		} else {
 			u32 mode = nvbo->tile_mode;
 			if (nv_device(drm->device)->card_type >= NV_C0)
 				mode >>= 4;
 			nv_fb->r_pitch = ((fb->pitches[0] / 4) << 4) | mode;
 		}
 	}

 	return 0;
 }

 static struct drm_framebuffer *
 nouveau_user_framebuffer_create(struct drm_device *dev,
 				struct drm_file *file_priv,
 				struct drm_mode_fb_cmd2 *mode_cmd)
 {
 	struct nouveau_framebuffer *nouveau_fb;
 	struct drm_gem_object *gem;
 	int ret;

 	gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
 	if (!gem)
 		return ERR_PTR(-ENOENT);

 	nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
 	if (!nouveau_fb)
 		return ERR_PTR(-ENOMEM);

 	ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
 	if (ret) {
 		drm_gem_object_unreference(gem);
 		return ERR_PTR(ret);
 	}

 	return &nouveau_fb->base;
 }

 static const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
 	.fb_create = nouveau_user_framebuffer_create,
 	.output_poll_changed = nouveau_fbcon_output_poll_changed,
 };


 struct nouveau_drm_prop_enum_list {
 	u8 gen_mask;
 	int type;
 	char *name;
 };

 static struct nouveau_drm_prop_enum_list underscan[] = {
 	{ 6, UNDERSCAN_AUTO, "auto" },
 	{ 6, UNDERSCAN_OFF, "off" },
 	{ 6, UNDERSCAN_ON, "on" },
 	{}
 };

 static struct nouveau_drm_prop_enum_list dither_mode[] = {
 	{ 7, DITHERING_MODE_AUTO, "auto" },
 	{ 7, DITHERING_MODE_OFF, "off" },
 	{ 1, DITHERING_MODE_ON, "on" },
 	{ 6, DITHERING_MODE_STATIC2X2, "static 2x2" },
 	{ 6, DITHERING_MODE_DYNAMIC2X2, "dynamic 2x2" },
 	{ 4, DITHERING_MODE_TEMPORAL, "temporal" },
 	{}
 };

 static struct nouveau_drm_prop_enum_list dither_depth[] = {
 	{ 6, DITHERING_DEPTH_AUTO, "auto" },
 	{ 6, DITHERING_DEPTH_6BPC, "6 bpc" },
 	{ 6, DITHERING_DEPTH_8BPC, "8 bpc" },
 	{}
 };

 #define PROP_ENUM(p,gen,n,list) do {                                           \
 	struct nouveau_drm_prop_enum_list *l = (list);                         \
 	int c = 0;                                                             \
 	while (l->gen_mask) {                                                  \
 		if (l->gen_mask & (1 << (gen)))                                \
 			c++;                                                   \
 		l++;                                                           \
 	}                                                                      \
 	if (c) {                                                               \
 		p = drm_property_create(dev, DRM_MODE_PROP_ENUM, n, c);        \
 		l = (list);                                                    \
 		c = 0;                                                         \
 		while (p && l->gen_mask) {                                     \
 			if (l->gen_mask & (1 << (gen))) {                      \
 				drm_property_add_enum(p, c, l->type, l->name); \
 				c++;                                           \
 			}                                                      \
 			l++;                                                   \
 		}                                                              \
 	}                                                                      \
 } while(0)

 int
 nouveau_display_init(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_display *disp = nouveau_display(dev);
 	struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
 	struct drm_connector *connector;
 	int ret;

 	ret = disp->init(dev);
 	if (ret)
 		return ret;

 	/* enable polling for external displays */
 	drm_kms_helper_poll_enable(dev);

 	/* enable hotplug interrupts */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		struct nouveau_connector *conn = nouveau_connector(connector);
 		if (gpio && conn->hpd.func != DCB_GPIO_UNUSED) {
 			nouveau_event_get(gpio->events, conn->hpd.line,
 					 &conn->hpd_func);
 		}
 	}

 	return ret;
 }

 void
 nouveau_display_fini(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_display *disp = nouveau_display(dev);
 	struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
 	struct drm_connector *connector;

 	/* disable hotplug interrupts */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		struct nouveau_connector *conn = nouveau_connector(connector);
 		if (gpio && conn->hpd.func != DCB_GPIO_UNUSED) {
 			nouveau_event_put(gpio->events, conn->hpd.line,
 					 &conn->hpd_func);
 		}
 	}

 	drm_kms_helper_poll_disable(dev);
 	disp->fini(dev);
 }

 int
 nouveau_display_create(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_display *disp;
 	u32 pclass = dev->pdev->class >> 8;
 	int ret, gen;

 	disp = drm->display = kzalloc(sizeof(*disp), GFP_KERNEL);
 	if (!disp)
 		return -ENOMEM;

 	drm_mode_config_init(dev);
 	drm_mode_create_scaling_mode_property(dev);
 	drm_mode_create_dvi_i_properties(dev);

 	if (nv_device(drm->device)->card_type < NV_50)
 		gen = 0;
 	else
 	if (nv_device(drm->device)->card_type < NV_D0)
 		gen = 1;
 	else
 		gen = 2;

 	PROP_ENUM(disp->dithering_mode, gen, "dithering mode", dither_mode);
 	PROP_ENUM(disp->dithering_depth, gen, "dithering depth", dither_depth);
 	PROP_ENUM(disp->underscan_property, gen, "underscan", underscan);

 	disp->underscan_hborder_property =
 		drm_property_create_range(dev, 0, "underscan hborder", 0, 128);

 	disp->underscan_vborder_property =
 		drm_property_create_range(dev, 0, "underscan vborder", 0, 128);

 	if (gen >= 1) {
 		/* -90..+90 */
 		disp->vibrant_hue_property =
 			drm_property_create_range(dev, 0, "vibrant hue", 0, 180);

 		/* -100..+100 */
 		disp->color_vibrance_property =
 			drm_property_create_range(dev, 0, "color vibrance", 0, 200);
 	}

 	dev->mode_config.funcs = &nouveau_mode_config_funcs;
 	dev->mode_config.fb_base = pci_resource_start(dev->pdev, 1);

 	dev->mode_config.min_width = 0;
 	dev->mode_config.min_height = 0;
 	if (nv_device(drm->device)->card_type < NV_10) {
 		dev->mode_config.max_width = 2048;
 		dev->mode_config.max_height = 2048;
 	} else
 	if (nv_device(drm->device)->card_type < NV_50) {
 		dev->mode_config.max_width = 4096;
 		dev->mode_config.max_height = 4096;
 	} else {
 		dev->mode_config.max_width = 8192;
 		dev->mode_config.max_height = 8192;
 	}

 	dev->mode_config.preferred_depth = 24;
 	dev->mode_config.prefer_shadow = 1;

 	drm_kms_helper_poll_init(dev);
 	drm_kms_helper_poll_disable(dev);

 	if (nouveau_modeset == 1 ||
 	    (nouveau_modeset < 0 && pclass == PCI_CLASS_DISPLAY_VGA)) {
 		if (nv_device(drm->device)->card_type < NV_50)
 			ret = nv04_display_create(dev);
 		else
 			ret = nv50_display_create(dev);
 		if (ret)
 			goto disp_create_err;

 		if (dev->mode_config.num_crtc) {
 			ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
 			if (ret)
 				goto vblank_err;
 		}

 		nouveau_backlight_init(dev);
 	}

 	return 0;

 vblank_err:
 	disp->dtor(dev);
 disp_create_err:
 	drm_kms_helper_poll_fini(dev);
 	drm_mode_config_cleanup(dev);
 	return ret;
 }

 void
 nouveau_display_destroy(struct drm_device *dev)
 {
 	struct nouveau_display *disp = nouveau_display(dev);

 	nouveau_backlight_exit(dev);
 	drm_vblank_cleanup(dev);

 	drm_kms_helper_poll_fini(dev);
 	drm_mode_config_cleanup(dev);

 	if (disp->dtor)
 		disp->dtor(dev);

 	nouveau_drm(dev)->display = NULL;
 	kfree(disp);
 }

 int
 nouveau_display_suspend(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct drm_crtc *crtc;

 	nouveau_display_fini(dev);

 	NV_INFO(drm, "unpinning framebuffer(s)...\n");
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_framebuffer *nouveau_fb;

 		nouveau_fb = nouveau_framebuffer(crtc->fb);
 		if (!nouveau_fb || !nouveau_fb->nvbo)
 			continue;

 		nouveau_bo_unpin(nouveau_fb->nvbo);
 	}

 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

 		nouveau_bo_unmap(nv_crtc->cursor.nvbo);
 		nouveau_bo_unpin(nv_crtc->cursor.nvbo);
 	}

 	return 0;
 }

 void
 nouveau_display_resume(struct drm_device *dev)
 {
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct drm_crtc *crtc;
 	int ret;

 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_framebuffer *nouveau_fb;

 		nouveau_fb = nouveau_framebuffer(crtc->fb);
 		if (!nouveau_fb || !nouveau_fb->nvbo)
 			continue;

 		nouveau_bo_pin(nouveau_fb->nvbo, TTM_PL_FLAG_VRAM);
 	}

 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

 		ret = nouveau_bo_pin(nv_crtc->cursor.nvbo, TTM_PL_FLAG_VRAM);
 		if (!ret)
 			ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
 		if (ret)
 			NV_ERROR(drm, "Could not pin/map cursor.\n");
 	}

 	nouveau_fbcon_set_suspend(dev, 0);
 	nouveau_fbcon_zfill_all(dev);

 	nouveau_display_init(dev);

 	/* Force CLUT to get re-loaded during modeset */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

 		nv_crtc->lut.depth = 0;
 	}

 	drm_helper_resume_force_mode(dev);

 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
 		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
 		u32 offset = nv_crtc->cursor.nvbo->bo.offset;

 		nv_crtc->cursor.set_offset(nv_crtc, offset);
 		nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
 						 nv_crtc->cursor_saved_y);
 	}
 }

 static int
 nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
 			  struct nouveau_bo *new_bo)
 {
 	int ret;

 	ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
 	if (ret)
 		return ret;

 	ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0);
 	if (ret)
 		goto fail;

 	if (likely(old_bo != new_bo)) {
 		ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
 		if (ret)
 			goto fail_unreserve;
 	}

 	return 0;

 fail_unreserve:
 	ttm_bo_unreserve(&new_bo->bo);
 fail:
 	nouveau_bo_unpin(new_bo);
 	return ret;
 }

 static void
 nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
 			    struct nouveau_bo *new_bo,
 			    struct nouveau_fence *fence)
 {
 	nouveau_bo_fence(new_bo, fence);
 	ttm_bo_unreserve(&new_bo->bo);

 	if (likely(old_bo != new_bo)) {
 		nouveau_bo_fence(old_bo, fence);
 		ttm_bo_unreserve(&old_bo->bo);
 	}

 	nouveau_bo_unpin(old_bo);
 }

 static int
 nouveau_page_flip_emit(struct nouveau_channel *chan,
 		       struct nouveau_bo *old_bo,
 		       struct nouveau_bo *new_bo,
 		       struct nouveau_page_flip_state *s,
 		       struct nouveau_fence **pfence)
 {
 	struct nouveau_fence_chan *fctx = chan->fence;
 	struct nouveau_drm *drm = chan->drm;
 	struct drm_device *dev = drm->dev;
 	unsigned long flags;
 	int ret;

 	/* Queue it to the pending list */
 	spin_lock_irqsave(&dev->event_lock, flags);
 	list_add_tail(&s->head, &fctx->flip);
 	spin_unlock_irqrestore(&dev->event_lock, flags);

 	/* Synchronize with the old framebuffer */
 	ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
 	if (ret)
 		goto fail;

 	/* Emit the pageflip */
 	ret = RING_SPACE(chan, 3);
 	if (ret)
 		goto fail;

 	if (nv_device(drm->device)->card_type < NV_C0) {
 		BEGIN_NV04(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
 		OUT_RING  (chan, 0x00000000);
 		OUT_RING  (chan, 0x00000000);
 	} else {
 		BEGIN_NVC0(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
 		OUT_RING  (chan, 0);
 		BEGIN_IMC0(chan, 0, NVSW_SUBCHAN_PAGE_FLIP, 0x0000);
 	}
 	FIRE_RING (chan);

 	ret = nouveau_fence_new(chan, false, pfence);
 	if (ret)
 		goto fail;

 	return 0;
 fail:
 	spin_lock_irqsave(&dev->event_lock, flags);
 	list_del(&s->head);
 	spin_unlock_irqrestore(&dev->event_lock, flags);
 	return ret;
 }

 int
 nouveau_crtc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb,
 		       struct drm_pending_vblank_event *event)
 {
 	struct drm_device *dev = crtc->dev;
 	struct nouveau_drm *drm = nouveau_drm(dev);
 	struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
 	struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
 	struct nouveau_page_flip_state *s;
 	struct nouveau_channel *chan = NULL;
 	struct nouveau_fence *fence;
 	int ret;

 	if (!drm->channel)
 		return -ENODEV;

 	s = kzalloc(sizeof(*s), GFP_KERNEL);
 	if (!s)
 		return -ENOMEM;

 	/* Don't let the buffers go away while we flip */
 	ret = nouveau_page_flip_reserve(old_bo, new_bo);
 	if (ret)
 		goto fail_free;

 	/* Initialize a page flip struct */
 	*s = (struct nouveau_page_flip_state)
 		{ { }, event, nouveau_crtc(crtc)->index,
 		  fb->bits_per_pixel, fb->pitches[0], crtc->x, crtc->y,
 		  new_bo->bo.offset };

 	/* Choose the channel the flip will be handled in */
 	fence = new_bo->bo.sync_obj;
 	if (fence)
 		chan = fence->channel;
 	if (!chan)
 		chan = drm->channel;
 	mutex_lock(&chan->cli->mutex);

 	/* Emit a page flip */
 	if (nv_device(drm->device)->card_type >= NV_50) {
 		ret = nv50_display_flip_next(crtc, fb, chan, 0);
 		if (ret) {
 			mutex_unlock(&chan->cli->mutex);
 			goto fail_unreserve;
 		}
 	}

 	ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
 	mutex_unlock(&chan->cli->mutex);
 	if (ret)
 		goto fail_unreserve;

 	/* Update the crtc struct and cleanup */
 	crtc->fb = fb;

 	nouveau_page_flip_unreserve(old_bo, new_bo, fence);
 	nouveau_fence_unref(&fence);
 	return 0;

 fail_unreserve:
 	nouveau_page_flip_unreserve(old_bo, new_bo, NULL);
 fail_free:
 	kfree(s);
 	return ret;
 }

 int
 nouveau_finish_page_flip(struct nouveau_channel *chan,
 			 struct nouveau_page_flip_state *ps)
 {
 	struct nouveau_fence_chan *fctx = chan->fence;
 	struct nouveau_drm *drm = chan->drm;
 	struct drm_device *dev = drm->dev;
 	struct nouveau_page_flip_state *s;
 	unsigned long flags;

 	spin_lock_irqsave(&dev->event_lock, flags);

 	if (list_empty(&fctx->flip)) {
 		NV_ERROR(drm, "unexpected pageflip\n");
 		spin_unlock_irqrestore(&dev->event_lock, flags);
 		return -EINVAL;
 	}

 	s = list_first_entry(&fctx->flip, struct nouveau_page_flip_state, head);
 	if (s->event) {
 		struct drm_pending_vblank_event *e = s->event;
 		struct timeval now;

 		do_gettimeofday(&now);
 		e->event.sequence = 0;
 		e->event.tv_sec = now.tv_sec;
 		e->event.tv_usec = now.tv_usec;
 		list_add_tail(&e->base.link, &e->base.file_priv->event_list);
 		wake_up_interruptible(&e->base.file_priv->event_wait);
 	}

 	list_del(&s->head);
 	if (ps)
 		*ps = *s;
 	kfree(s);

 	spin_unlock_irqrestore(&dev->event_lock, flags);
 	return 0;
 }

 int
 nouveau_flip_complete(void *data)
 {
 	struct nouveau_channel *chan = data;
 	struct nouveau_drm *drm = chan->drm;
 	struct nouveau_page_flip_state state;

 	if (!nouveau_finish_page_flip(chan, &state)) {
 		if (nv_device(drm->device)->card_type < NV_50) {
 			nv_set_crtc_base(drm->dev, state.crtc, state.offset +
 					 state.y * state.pitch +
 					 state.x * state.bpp / 8);
 		}
 	}

 	return 0;
 }

 int
 nouveau_display_dumb_create(struct drm_file *file_priv, struct drm_device *dev,
 			    struct drm_mode_create_dumb *args)
 {
 	struct nouveau_bo *bo;
 	int ret;

 	args->pitch = roundup(args->width * (args->bpp / 8), 256);
 	args->size = args->pitch * args->height;
 	args->size = roundup(args->size, PAGE_SIZE);

 	ret = nouveau_gem_new(dev, args->size, 0, NOUVEAU_GEM_DOMAIN_VRAM, 0, 0, &bo);
 	if (ret)
 		return ret;

 	ret = drm_gem_handle_create(file_priv, bo->gem, &args->handle);
 	drm_gem_object_unreference_unlocked(bo->gem);
 	return ret;
 }

 int
 nouveau_display_dumb_destroy(struct drm_file *file_priv, struct drm_device *dev,
 			     uint32_t handle)
 {
 	return drm_gem_handle_delete(file_priv, handle);
 }

 int
 nouveau_display_dumb_map_offset(struct drm_file *file_priv,
 				struct drm_device *dev,
 				uint32_t handle, uint64_t *poffset)
 {
 	struct drm_gem_object *gem;

 	gem = drm_gem_object_lookup(dev, file_priv, handle);
 	if (gem) {
 		struct nouveau_bo *bo = gem->driver_private;
 		*poffset = bo->bo.addr_space_offset;
 		drm_gem_object_unreference_unlocked(gem);
 		return 0;
 	}

 	return -ENOENT;
 }
	/*
	* Copyright (C) 2008 Maarten Maathuis.
	* 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 THE COPYRIGHT OWNER(S) 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 <drm/drmP.h>
	#include <drm/drm_crtc_helper.h>

	#include "nouveau_fbcon.h"
	#include "nouveau_hw.h"
	#include "nouveau_crtc.h"
	#include "nouveau_dma.h"
	#include "nouveau_gem.h"
	#include "nouveau_connector.h"
	#include "nv50_display.h"

	#include "nouveau_fence.h"

	#include <subdev/bios/gpio.h>
	#include <subdev/gpio.h>
	#include <engine/disp.h>

	#include <core/class.h>

	static void
	nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
	{
	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);

	if (fb->nvbo)
	drm_gem_object_unreference_unlocked(fb->nvbo->gem);

	drm_framebuffer_cleanup(drm_fb);
	kfree(fb);
	}

	static int
	nouveau_user_framebuffer_create_handle(struct drm_framebuffer *drm_fb,
	struct drm_file *file_priv,
	unsigned int *handle)
	{
	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);

	return drm_gem_handle_create(file_priv, fb->nvbo->gem, handle);
	}

	static const struct drm_framebuffer_funcs nouveau_framebuffer_funcs = {
	.destroy = nouveau_user_framebuffer_destroy,
	.create_handle = nouveau_user_framebuffer_create_handle,
	};

	int
	nouveau_framebuffer_init(struct drm_device *dev,
	struct nouveau_framebuffer *nv_fb,
	struct drm_mode_fb_cmd2 *mode_cmd,
	struct nouveau_bo *nvbo)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct drm_framebuffer *fb = &nv_fb->base;
	int ret;

	ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
	if (ret) {
	return ret;
	}

	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
	nv_fb->nvbo = nvbo;

	if (nv_device(drm->device)->card_type >= NV_50) {
	u32 tile_flags = nouveau_bo_tile_layout(nvbo);
	if (tile_flags == 0x7a00 \|\|
	tile_flags == 0xfe00)
	nv_fb->r_dma = NvEvoFB32;
	else
	if (tile_flags == 0x7000)
	nv_fb->r_dma = NvEvoFB16;
	else
	nv_fb->r_dma = NvEvoVRAM_LP;

	switch (fb->depth) {
	case 8: nv_fb->r_format = 0x1e00; break;
	case 15: nv_fb->r_format = 0xe900; break;
	case 16: nv_fb->r_format = 0xe800; break;
	case 24:
	case 32: nv_fb->r_format = 0xcf00; break;
	case 30: nv_fb->r_format = 0xd100; break;
	default:
	NV_ERROR(drm, "unknown depth %d\n", fb->depth);
	return -EINVAL;
	}

	if (nv_device(drm->device)->chipset == 0x50)
	nv_fb->r_format \|= (tile_flags << 8);

	if (!tile_flags) {
	if (nv_device(drm->device)->card_type < NV_D0)
	nv_fb->r_pitch = 0x00100000 \| fb->pitches[0];
	else
	nv_fb->r_pitch = 0x01000000 \| fb->pitches[0];
	} else {
	u32 mode = nvbo->tile_mode;
	if (nv_device(drm->device)->card_type >= NV_C0)
	mode >>= 4;
	nv_fb->r_pitch = ((fb->pitches[0] / 4) << 4) \| mode;
	}
	}

	return 0;
	}

	static struct drm_framebuffer *
	nouveau_user_framebuffer_create(struct drm_device *dev,
	struct drm_file *file_priv,
	struct drm_mode_fb_cmd2 *mode_cmd)
	{
	struct nouveau_framebuffer *nouveau_fb;
	struct drm_gem_object *gem;
	int ret;

	gem = drm_gem_object_lookup(dev, file_priv, mode_cmd->handles[0]);
	if (!gem)
	return ERR_PTR(-ENOENT);

	nouveau_fb = kzalloc(sizeof(struct nouveau_framebuffer), GFP_KERNEL);
	if (!nouveau_fb)
	return ERR_PTR(-ENOMEM);

	ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
	if (ret) {
	drm_gem_object_unreference(gem);
	return ERR_PTR(ret);
	}

	return &nouveau_fb->base;
	}

	static const struct drm_mode_config_funcs nouveau_mode_config_funcs = {
	.fb_create = nouveau_user_framebuffer_create,
	.output_poll_changed = nouveau_fbcon_output_poll_changed,
	};


	struct nouveau_drm_prop_enum_list {
	u8 gen_mask;
	int type;
	char *name;
	};

	static struct nouveau_drm_prop_enum_list underscan[] = {
	{ 6, UNDERSCAN_AUTO, "auto" },
	{ 6, UNDERSCAN_OFF, "off" },
	{ 6, UNDERSCAN_ON, "on" },
	{}
	};

	static struct nouveau_drm_prop_enum_list dither_mode[] = {
	{ 7, DITHERING_MODE_AUTO, "auto" },
	{ 7, DITHERING_MODE_OFF, "off" },
	{ 1, DITHERING_MODE_ON, "on" },
	{ 6, DITHERING_MODE_STATIC2X2, "static 2x2" },
	{ 6, DITHERING_MODE_DYNAMIC2X2, "dynamic 2x2" },
	{ 4, DITHERING_MODE_TEMPORAL, "temporal" },
	{}
	};

	static struct nouveau_drm_prop_enum_list dither_depth[] = {
	{ 6, DITHERING_DEPTH_AUTO, "auto" },
	{ 6, DITHERING_DEPTH_6BPC, "6 bpc" },
	{ 6, DITHERING_DEPTH_8BPC, "8 bpc" },
	{}
	};

	#define PROP_ENUM(p,gen,n,list) do { \
	struct nouveau_drm_prop_enum_list *l = (list); \
	int c = 0; \
	while (l->gen_mask) { \
	if (l->gen_mask & (1 << (gen))) \
	c++; \
	l++; \
	} \
	if (c) { \
	p = drm_property_create(dev, DRM_MODE_PROP_ENUM, n, c); \
	l = (list); \
	c = 0; \
	while (p && l->gen_mask) { \
	if (l->gen_mask & (1 << (gen))) { \
	drm_property_add_enum(p, c, l->type, l->name); \
	c++; \
	} \
	l++; \
	} \
	} \
	} while(0)

	int
	nouveau_display_init(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_display *disp = nouveau_display(dev);
	struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
	struct drm_connector *connector;
	int ret;

	ret = disp->init(dev);
	if (ret)
	return ret;

	/* enable polling for external displays */
	drm_kms_helper_poll_enable(dev);

	/* enable hotplug interrupts */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	struct nouveau_connector *conn = nouveau_connector(connector);
	if (gpio && conn->hpd.func != DCB_GPIO_UNUSED) {
	nouveau_event_get(gpio->events, conn->hpd.line,
	&conn->hpd_func);
	}
	}

	return ret;
	}

	void
	nouveau_display_fini(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_display *disp = nouveau_display(dev);
	struct nouveau_gpio *gpio = nouveau_gpio(drm->device);
	struct drm_connector *connector;

	/* disable hotplug interrupts */
	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
	struct nouveau_connector *conn = nouveau_connector(connector);
	if (gpio && conn->hpd.func != DCB_GPIO_UNUSED) {
	nouveau_event_put(gpio->events, conn->hpd.line,
	&conn->hpd_func);
	}
	}

	drm_kms_helper_poll_disable(dev);
	disp->fini(dev);
	}

	int
	nouveau_display_create(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_display *disp;
	u32 pclass = dev->pdev->class >> 8;
	int ret, gen;

	disp = drm->display = kzalloc(sizeof(*disp), GFP_KERNEL);
	if (!disp)
	return -ENOMEM;

	drm_mode_config_init(dev);
	drm_mode_create_scaling_mode_property(dev);
	drm_mode_create_dvi_i_properties(dev);

	if (nv_device(drm->device)->card_type < NV_50)
	gen = 0;
	else
	if (nv_device(drm->device)->card_type < NV_D0)
	gen = 1;
	else
	gen = 2;

	PROP_ENUM(disp->dithering_mode, gen, "dithering mode", dither_mode);
	PROP_ENUM(disp->dithering_depth, gen, "dithering depth", dither_depth);
	PROP_ENUM(disp->underscan_property, gen, "underscan", underscan);

	disp->underscan_hborder_property =
	drm_property_create_range(dev, 0, "underscan hborder", 0, 128);

	disp->underscan_vborder_property =
	drm_property_create_range(dev, 0, "underscan vborder", 0, 128);

	if (gen >= 1) {
	/* -90..+90 */
	disp->vibrant_hue_property =
	drm_property_create_range(dev, 0, "vibrant hue", 0, 180);

	/* -100..+100 */
	disp->color_vibrance_property =
	drm_property_create_range(dev, 0, "color vibrance", 0, 200);
	}

	dev->mode_config.funcs = &nouveau_mode_config_funcs;
	dev->mode_config.fb_base = pci_resource_start(dev->pdev, 1);

	dev->mode_config.min_width = 0;
	dev->mode_config.min_height = 0;
	if (nv_device(drm->device)->card_type < NV_10) {
	dev->mode_config.max_width = 2048;
	dev->mode_config.max_height = 2048;
	} else
	if (nv_device(drm->device)->card_type < NV_50) {
	dev->mode_config.max_width = 4096;
	dev->mode_config.max_height = 4096;
	} else {
	dev->mode_config.max_width = 8192;
	dev->mode_config.max_height = 8192;
	}

	dev->mode_config.preferred_depth = 24;
	dev->mode_config.prefer_shadow = 1;

	drm_kms_helper_poll_init(dev);
	drm_kms_helper_poll_disable(dev);

	if (nouveau_modeset == 1 \|\|
	(nouveau_modeset < 0 && pclass == PCI_CLASS_DISPLAY_VGA)) {
	if (nv_device(drm->device)->card_type < NV_50)
	ret = nv04_display_create(dev);
	else
	ret = nv50_display_create(dev);
	if (ret)
	goto disp_create_err;

	if (dev->mode_config.num_crtc) {
	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
	if (ret)
	goto vblank_err;
	}

	nouveau_backlight_init(dev);
	}

	return 0;

	vblank_err:
	disp->dtor(dev);
	disp_create_err:
	drm_kms_helper_poll_fini(dev);
	drm_mode_config_cleanup(dev);
	return ret;
	}

	void
	nouveau_display_destroy(struct drm_device *dev)
	{
	struct nouveau_display *disp = nouveau_display(dev);

	nouveau_backlight_exit(dev);
	drm_vblank_cleanup(dev);

	drm_kms_helper_poll_fini(dev);
	drm_mode_config_cleanup(dev);

	if (disp->dtor)
	disp->dtor(dev);

	nouveau_drm(dev)->display = NULL;
	kfree(disp);
	}

	int
	nouveau_display_suspend(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct drm_crtc *crtc;

	nouveau_display_fini(dev);

	NV_INFO(drm, "unpinning framebuffer(s)...\n");
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_framebuffer *nouveau_fb;

	nouveau_fb = nouveau_framebuffer(crtc->fb);
	if (!nouveau_fb \|\| !nouveau_fb->nvbo)
	continue;

	nouveau_bo_unpin(nouveau_fb->nvbo);
	}

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

	nouveau_bo_unmap(nv_crtc->cursor.nvbo);
	nouveau_bo_unpin(nv_crtc->cursor.nvbo);
	}

	return 0;
	}

	void
	nouveau_display_resume(struct drm_device *dev)
	{
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct drm_crtc *crtc;
	int ret;

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_framebuffer *nouveau_fb;

	nouveau_fb = nouveau_framebuffer(crtc->fb);
	if (!nouveau_fb \|\| !nouveau_fb->nvbo)
	continue;

	nouveau_bo_pin(nouveau_fb->nvbo, TTM_PL_FLAG_VRAM);
	}

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

	ret = nouveau_bo_pin(nv_crtc->cursor.nvbo, TTM_PL_FLAG_VRAM);
	if (!ret)
	ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
	if (ret)
	NV_ERROR(drm, "Could not pin/map cursor.\n");
	}

	nouveau_fbcon_set_suspend(dev, 0);
	nouveau_fbcon_zfill_all(dev);

	nouveau_display_init(dev);

	/* Force CLUT to get re-loaded during modeset */
	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);

	nv_crtc->lut.depth = 0;
	}

	drm_helper_resume_force_mode(dev);

	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
	struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
	u32 offset = nv_crtc->cursor.nvbo->bo.offset;

	nv_crtc->cursor.set_offset(nv_crtc, offset);
	nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
	nv_crtc->cursor_saved_y);
	}
	}

	static int
	nouveau_page_flip_reserve(struct nouveau_bo *old_bo,
	struct nouveau_bo *new_bo)
	{
	int ret;

	ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM);
	if (ret)
	return ret;

	ret = ttm_bo_reserve(&new_bo->bo, false, false, false, 0);
	if (ret)
	goto fail;

	if (likely(old_bo != new_bo)) {
	ret = ttm_bo_reserve(&old_bo->bo, false, false, false, 0);
	if (ret)
	goto fail_unreserve;
	}

	return 0;

	fail_unreserve:
	ttm_bo_unreserve(&new_bo->bo);
	fail:
	nouveau_bo_unpin(new_bo);
	return ret;
	}

	static void
	nouveau_page_flip_unreserve(struct nouveau_bo *old_bo,
	struct nouveau_bo *new_bo,
	struct nouveau_fence *fence)
	{
	nouveau_bo_fence(new_bo, fence);
	ttm_bo_unreserve(&new_bo->bo);

	if (likely(old_bo != new_bo)) {
	nouveau_bo_fence(old_bo, fence);
	ttm_bo_unreserve(&old_bo->bo);
	}

	nouveau_bo_unpin(old_bo);
	}

	static int
	nouveau_page_flip_emit(struct nouveau_channel *chan,
	struct nouveau_bo *old_bo,
	struct nouveau_bo *new_bo,
	struct nouveau_page_flip_state *s,
	struct nouveau_fence **pfence)
	{
	struct nouveau_fence_chan *fctx = chan->fence;
	struct nouveau_drm *drm = chan->drm;
	struct drm_device *dev = drm->dev;
	unsigned long flags;
	int ret;

	/* Queue it to the pending list */
	spin_lock_irqsave(&dev->event_lock, flags);
	list_add_tail(&s->head, &fctx->flip);
	spin_unlock_irqrestore(&dev->event_lock, flags);

	/* Synchronize with the old framebuffer */
	ret = nouveau_fence_sync(old_bo->bo.sync_obj, chan);
	if (ret)
	goto fail;

	/* Emit the pageflip */
	ret = RING_SPACE(chan, 3);
	if (ret)
	goto fail;

	if (nv_device(drm->device)->card_type < NV_C0) {
	BEGIN_NV04(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
	OUT_RING (chan, 0x00000000);
	OUT_RING (chan, 0x00000000);
	} else {
	BEGIN_NVC0(chan, 0, NV10_SUBCHAN_REF_CNT, 1);
	OUT_RING (chan, 0);
	BEGIN_IMC0(chan, 0, NVSW_SUBCHAN_PAGE_FLIP, 0x0000);
	}
	FIRE_RING (chan);

	ret = nouveau_fence_new(chan, false, pfence);
	if (ret)
	goto fail;

	return 0;
	fail:
	spin_lock_irqsave(&dev->event_lock, flags);
	list_del(&s->head);
	spin_unlock_irqrestore(&dev->event_lock, flags);
	return ret;
	}

	int
	nouveau_crtc_page_flip(struct drm_crtc crtc, struct drm_framebuffer fb,
	struct drm_pending_vblank_event *event)
	{
	struct drm_device *dev = crtc->dev;
	struct nouveau_drm *drm = nouveau_drm(dev);
	struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->fb)->nvbo;
	struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
	struct nouveau_page_flip_state *s;
	struct nouveau_channel *chan = NULL;
	struct nouveau_fence *fence;
	int ret;

	if (!drm->channel)
	return -ENODEV;

	s = kzalloc(sizeof(*s), GFP_KERNEL);
	if (!s)
	return -ENOMEM;

	/* Don't let the buffers go away while we flip */
	ret = nouveau_page_flip_reserve(old_bo, new_bo);
	if (ret)
	goto fail_free;

	/* Initialize a page flip struct */
	*s = (struct nouveau_page_flip_state)
	{ { }, event, nouveau_crtc(crtc)->index,
	fb->bits_per_pixel, fb->pitches[0], crtc->x, crtc->y,
	new_bo->bo.offset };

	/* Choose the channel the flip will be handled in */
	fence = new_bo->bo.sync_obj;
	if (fence)
	chan = fence->channel;
	if (!chan)
	chan = drm->channel;
	mutex_lock(&chan->cli->mutex);

	/* Emit a page flip */
	if (nv_device(drm->device)->card_type >= NV_50) {
	ret = nv50_display_flip_next(crtc, fb, chan, 0);
	if (ret) {
	mutex_unlock(&chan->cli->mutex);
	goto fail_unreserve;
	}
	}

	ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
	mutex_unlock(&chan->cli->mutex);
	if (ret)
	goto fail_unreserve;

	/* Update the crtc struct and cleanup */
	crtc->fb = fb;

	nouveau_page_flip_unreserve(old_bo, new_bo, fence);
	nouveau_fence_unref(&fence);
	return 0;

	fail_unreserve:
	nouveau_page_flip_unreserve(old_bo, new_bo, NULL);
	fail_free:
	kfree(s);
	return ret;
	}

	int
	nouveau_finish_page_flip(struct nouveau_channel *chan,
	struct nouveau_page_flip_state *ps)
	{
	struct nouveau_fence_chan *fctx = chan->fence;
	struct nouveau_drm *drm = chan->drm;
	struct drm_device *dev = drm->dev;
	struct nouveau_page_flip_state *s;
	unsigned long flags;

	spin_lock_irqsave(&dev->event_lock, flags);

	if (list_empty(&fctx->flip)) {
	NV_ERROR(drm, "unexpected pageflip\n");
	spin_unlock_irqrestore(&dev->event_lock, flags);
	return -EINVAL;
	}

	s = list_first_entry(&fctx->flip, struct nouveau_page_flip_state, head);
	if (s->event) {
	struct drm_pending_vblank_event *e = s->event;
	struct timeval now;

	do_gettimeofday(&now);
	e->event.sequence = 0;
	e->event.tv_sec = now.tv_sec;
	e->event.tv_usec = now.tv_usec;
	list_add_tail(&e->base.link, &e->base.file_priv->event_list);
	wake_up_interruptible(&e->base.file_priv->event_wait);
	}

	list_del(&s->head);
	if (ps)
	ps = s;
	kfree(s);

	spin_unlock_irqrestore(&dev->event_lock, flags);
	return 0;
	}

	int
	nouveau_flip_complete(void *data)
	{
	struct nouveau_channel *chan = data;
	struct nouveau_drm *drm = chan->drm;
	struct nouveau_page_flip_state state;

	if (!nouveau_finish_page_flip(chan, &state)) {
	if (nv_device(drm->device)->card_type < NV_50) {
	nv_set_crtc_base(drm->dev, state.crtc, state.offset +
	state.y * state.pitch +
	state.x * state.bpp / 8);
	}
	}

	return 0;
	}

	int
	nouveau_display_dumb_create(struct drm_file file_priv, struct drm_device dev,
	struct drm_mode_create_dumb *args)
	{
	struct nouveau_bo *bo;
	int ret;

	args->pitch = roundup(args->width * (args->bpp / 8), 256);
	args->size = args->pitch * args->height;
	args->size = roundup(args->size, PAGE_SIZE);

	ret = nouveau_gem_new(dev, args->size, 0, NOUVEAU_GEM_DOMAIN_VRAM, 0, 0, &bo);
	if (ret)
	return ret;

	ret = drm_gem_handle_create(file_priv, bo->gem, &args->handle);
	drm_gem_object_unreference_unlocked(bo->gem);
	return ret;
	}

	int
	nouveau_display_dumb_destroy(struct drm_file file_priv, struct drm_device dev,
	uint32_t handle)
	{
	return drm_gem_handle_delete(file_priv, handle);
	}

	int
	nouveau_display_dumb_map_offset(struct drm_file *file_priv,
	struct drm_device *dev,
	uint32_t handle, uint64_t *poffset)
	{
	struct drm_gem_object *gem;

	gem = drm_gem_object_lookup(dev, file_priv, handle);
	if (gem) {
	struct nouveau_bo *bo = gem->driver_private;
	*poffset = bo->bo.addr_space_offset;
	drm_gem_object_unreference_unlocked(gem);
	return 0;
	}

	return -ENOENT;
	}