Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 910 insertions, 0 deletions

diff --git a/kernel/drivers/gpu/drm/nouveau/nouveau_display.c b/kernel/drivers/gpu/drm/nouveau/nouveau_display.c
new file mode 100644
index 000000000..8670d90cd
--- /dev/null
+++ b/kernel/drivers/gpu/drm/nouveau/nouveau_display.c
@@ -0,0 +1,910 @@
+/*
+ * 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 <nvif/class.h>
+
+#include "nouveau_fbcon.h"
+#include "dispnv04/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 <nvif/event.h>
+
+static int
+nouveau_display_vblank_handler(struct nvif_notify *notify)
+{
+	struct nouveau_crtc *nv_crtc =
+		container_of(notify, typeof(*nv_crtc), vblank);
+	drm_handle_vblank(nv_crtc->base.dev, nv_crtc->index);
+	return NVIF_NOTIFY_KEEP;
+}
+
+int
+nouveau_display_vblank_enable(struct drm_device *dev, int head)
+{
+	struct drm_crtc *crtc;
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+		if (nv_crtc->index == head) {
+			nvif_notify_get(&nv_crtc->vblank);
+			return 0;
+		}
+	}
+	return -EINVAL;
+}
+
+void
+nouveau_display_vblank_disable(struct drm_device *dev, int head)
+{
+	struct drm_crtc *crtc;
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+		if (nv_crtc->index == head) {
+			nvif_notify_put(&nv_crtc->vblank);
+			return;
+		}
+	}
+}
+
+static inline int
+calc(int blanks, int blanke, int total, int line)
+{
+	if (blanke >= blanks) {
+		if (line >= blanks)
+			line -= total;
+	} else {
+		if (line >= blanks)
+			line -= total;
+		line -= blanke + 1;
+	}
+	return line;
+}
+
+int
+nouveau_display_scanoutpos_head(struct drm_crtc *crtc, int *vpos, int *hpos,
+				ktime_t *stime, ktime_t *etime)
+{
+	struct {
+		struct nv04_disp_mthd_v0 base;
+		struct nv04_disp_scanoutpos_v0 scan;
+	} args = {
+		.base.method = NV04_DISP_SCANOUTPOS,
+		.base.head = nouveau_crtc(crtc)->index,
+	};
+	struct nouveau_display *disp = nouveau_display(crtc->dev);
+	int ret, retry = 1;
+
+	do {
+		ret = nvif_mthd(&disp->disp, 0, &args, sizeof(args));
+		if (ret != 0)
+			return 0;
+
+		if (args.scan.vline) {
+			ret |= DRM_SCANOUTPOS_ACCURATE;
+			ret |= DRM_SCANOUTPOS_VALID;
+			break;
+		}
+
+		if (retry) ndelay(crtc->linedur_ns);
+	} while (retry--);
+
+	*hpos = args.scan.hline;
+	*vpos = calc(args.scan.vblanks, args.scan.vblanke,
+		     args.scan.vtotal, args.scan.vline);
+	if (stime) *stime = ns_to_ktime(args.scan.time[0]);
+	if (etime) *etime = ns_to_ktime(args.scan.time[1]);
+
+	if (*vpos < 0)
+		ret |= DRM_SCANOUTPOS_IN_VBLANK;
+	return ret;
+}
+
+int
+nouveau_display_scanoutpos(struct drm_device *dev, int head, unsigned int flags,
+			   int *vpos, int *hpos, ktime_t *stime, ktime_t *etime)
+{
+	struct drm_crtc *crtc;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		if (nouveau_crtc(crtc)->index == head) {
+			return nouveau_display_scanoutpos_head(crtc, vpos, hpos,
+							       stime, etime);
+		}
+	}
+
+	return 0;
+}
+
+int
+nouveau_display_vblstamp(struct drm_device *dev, int head, int *max_error,
+			 struct timeval *time, unsigned flags)
+{
+	struct drm_crtc *crtc;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		if (nouveau_crtc(crtc)->index == head) {
+			return drm_calc_vbltimestamp_from_scanoutpos(dev,
+					head, max_error, time, flags, crtc,
+					&crtc->hwmode);
+		}
+	}
+
+	return -EINVAL;
+}
+
+static void
+nouveau_display_vblank_fini(struct drm_device *dev)
+{
+	struct drm_crtc *crtc;
+
+	drm_vblank_cleanup(dev);
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+		nvif_notify_fini(&nv_crtc->vblank);
+	}
+}
+
+static int
+nouveau_display_vblank_init(struct drm_device *dev)
+{
+	struct nouveau_display *disp = nouveau_display(dev);
+	struct drm_crtc *crtc;
+	int ret;
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+		ret = nvif_notify_init(&disp->disp, NULL,
+				       nouveau_display_vblank_handler, false,
+				       NV04_DISP_NTFY_VBLANK,
+				       &(struct nvif_notify_head_req_v0) {
+					.head = nv_crtc->index,
+				       },
+				       sizeof(struct nvif_notify_head_req_v0),
+				       sizeof(struct nvif_notify_head_rep_v0),
+				       &nv_crtc->vblank);
+		if (ret) {
+			nouveau_display_vblank_fini(dev);
+			return ret;
+		}
+	}
+
+	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
+	if (ret) {
+		nouveau_display_vblank_fini(dev);
+		return ret;
+	}
+
+	return 0;
+}
+
+static void
+nouveau_user_framebuffer_destroy(struct drm_framebuffer *drm_fb)
+{
+	struct nouveau_framebuffer *fb = nouveau_framebuffer(drm_fb);
+	struct nouveau_display *disp = nouveau_display(drm_fb->dev);
+
+	if (disp->fb_dtor)
+		disp->fb_dtor(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_display *disp = nouveau_display(dev);
+	struct drm_framebuffer *fb = &nv_fb->base;
+	int ret;
+
+	drm_helper_mode_fill_fb_struct(fb, mode_cmd);
+	nv_fb->nvbo = nvbo;
+
+	ret = drm_framebuffer_init(dev, fb, &nouveau_framebuffer_funcs);
+	if (ret)
+		return ret;
+
+	if (disp->fb_ctor) {
+		ret = disp->fb_ctor(fb);
+		if (ret)
+			disp->fb_dtor(fb);
+	}
+
+	return ret;
+}
+
+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 = -ENOMEM;
+
+	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)
+		goto err_unref;
+
+	ret = nouveau_framebuffer_init(dev, nouveau_fb, mode_cmd, nouveau_gem_object(gem));
+	if (ret)
+		goto err;
+
+	return &nouveau_fb->base;
+
+err:
+	kfree(nouveau_fb);
+err_unref:
+	drm_gem_object_unreference(gem);
+	return ERR_PTR(ret);
+}
+
+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_display *disp = nouveau_display(dev);
+	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);
+		nvif_notify_get(&conn->hpd);
+	}
+
+	return ret;
+}
+
+void
+nouveau_display_fini(struct drm_device *dev)
+{
+	struct nouveau_display *disp = nouveau_display(dev);
+	struct drm_connector *connector;
+	int head;
+
+	/* Make sure that drm and hw vblank irqs get properly disabled. */
+	for (head = 0; head < dev->mode_config.num_crtc; head++)
+		drm_vblank_off(dev, head);
+
+	/* disable hotplug interrupts */
+	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+		struct nouveau_connector *conn = nouveau_connector(connector);
+		nvif_notify_put(&conn->hpd);
+	}
+
+	drm_kms_helper_poll_disable(dev);
+	disp->fini(dev);
+}
+
+static void
+nouveau_display_create_properties(struct drm_device *dev)
+{
+	struct nouveau_display *disp = nouveau_display(dev);
+	int gen;
+
+	if (disp->disp.oclass < NV50_DISP)
+		gen = 0;
+	else
+	if (disp->disp.oclass < GF110_DISP)
+		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)
+		return;
+
+	/* -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);
+}
+
+int
+nouveau_display_create(struct drm_device *dev)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_display *disp;
+	int ret;
+
+	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);
+
+	dev->mode_config.funcs = &nouveau_mode_config_funcs;
+	dev->mode_config.fb_base = nv_device_resource_start(nvxx_device(&drm->device), 1);
+
+	dev->mode_config.min_width = 0;
+	dev->mode_config.min_height = 0;
+	if (drm->device.info.family < NV_DEVICE_INFO_V0_CELSIUS) {
+		dev->mode_config.max_width = 2048;
+		dev->mode_config.max_height = 2048;
+	} else
+	if (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) {
+		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;
+
+	if (drm->device.info.chipset < 0x11)
+		dev->mode_config.async_page_flip = false;
+	else
+		dev->mode_config.async_page_flip = true;
+
+	drm_kms_helper_poll_init(dev);
+	drm_kms_helper_poll_disable(dev);
+
+	if (nouveau_modeset != 2 && drm->vbios.dcb.entries) {
+		static const u16 oclass[] = {
+			GM204_DISP,
+			GM107_DISP,
+			GK110_DISP,
+			GK104_DISP,
+			GF110_DISP,
+			GT214_DISP,
+			GT206_DISP,
+			GT200_DISP,
+			G82_DISP,
+			NV50_DISP,
+			NV04_DISP,
+		};
+		int i;
+
+		for (i = 0, ret = -ENODEV; ret && i < ARRAY_SIZE(oclass); i++) {
+			ret = nvif_object_init(nvif_object(&drm->device), NULL,
+					       NVDRM_DISPLAY, oclass[i],
+					       NULL, 0, &disp->disp);
+		}
+
+		if (ret == 0) {
+			nouveau_display_create_properties(dev);
+			if (disp->disp.oclass < NV50_DISP)
+				ret = nv04_display_create(dev);
+			else
+				ret = nv50_display_create(dev);
+		}
+	} else {
+		ret = 0;
+	}
+
+	if (ret)
+		goto disp_create_err;
+
+	if (dev->mode_config.num_crtc) {
+		ret = nouveau_display_vblank_init(dev);
+		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);
+	nouveau_display_vblank_fini(dev);
+
+	drm_kms_helper_poll_fini(dev);
+	drm_mode_config_cleanup(dev);
+
+	if (disp->dtor)
+		disp->dtor(dev);
+
+	nvif_object_fini(&disp->disp);
+
+	nouveau_drm(dev)->display = NULL;
+	kfree(disp);
+}
+
+int
+nouveau_display_suspend(struct drm_device *dev, bool runtime)
+{
+	struct drm_crtc *crtc;
+
+	nouveau_display_fini(dev);
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_framebuffer *nouveau_fb;
+
+		nouveau_fb = nouveau_framebuffer(crtc->primary->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);
+		if (nv_crtc->cursor.nvbo) {
+			if (nv_crtc->cursor.set_offset)
+				nouveau_bo_unmap(nv_crtc->cursor.nvbo);
+			nouveau_bo_unpin(nv_crtc->cursor.nvbo);
+		}
+	}
+
+	return 0;
+}
+
+void
+nouveau_display_resume(struct drm_device *dev, bool runtime)
+{
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct drm_crtc *crtc;
+	int ret, head;
+
+	/* re-pin fb/cursors */
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_framebuffer *nouveau_fb;
+
+		nouveau_fb = nouveau_framebuffer(crtc->primary->fb);
+		if (!nouveau_fb || !nouveau_fb->nvbo)
+			continue;
+
+		ret = nouveau_bo_pin(nouveau_fb->nvbo, TTM_PL_FLAG_VRAM, true);
+		if (ret)
+			NV_ERROR(drm, "Could not pin framebuffer\n");
+	}
+
+	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
+		struct nouveau_crtc *nv_crtc = nouveau_crtc(crtc);
+		if (!nv_crtc->cursor.nvbo)
+			continue;
+
+		ret = nouveau_bo_pin(nv_crtc->cursor.nvbo, TTM_PL_FLAG_VRAM, true);
+		if (!ret && nv_crtc->cursor.set_offset)
+			ret = nouveau_bo_map(nv_crtc->cursor.nvbo);
+		if (ret)
+			NV_ERROR(drm, "Could not pin/map cursor.\n");
+	}
+
+	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;
+	}
+
+	/* Make sure that drm and hw vblank irqs get resumed if needed. */
+	for (head = 0; head < dev->mode_config.num_crtc; head++)
+		drm_vblank_on(dev, head);
+
+	/* This should ensure we don't hit a locking problem when someone
+	 * wakes us up via a connector.  We should never go into suspend
+	 * while the display is on anyways.
+	 */
+	if (runtime)
+		return;
+
+	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);
+
+		if (!nv_crtc->cursor.nvbo)
+			continue;
+
+		if (nv_crtc->cursor.set_offset)
+			nv_crtc->cursor.set_offset(nv_crtc, nv_crtc->cursor.nvbo->bo.offset);
+		nv_crtc->cursor.set_pos(nv_crtc, nv_crtc->cursor_saved_x,
+						 nv_crtc->cursor_saved_y);
+	}
+}
+
+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, chan, false, false);
+	if (ret)
+		goto fail;
+
+	/* Emit the pageflip */
+	ret = RING_SPACE(chan, 2);
+	if (ret)
+		goto fail;
+
+	if (drm->device.info.family < NV_DEVICE_INFO_V0_FERMI)
+		BEGIN_NV04(chan, NvSubSw, NV_SW_PAGE_FLIP, 1);
+	else
+		BEGIN_NVC0(chan, FermiSw, NV_SW_PAGE_FLIP, 1);
+	OUT_RING  (chan, 0x00000000);
+	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, u32 flags)
+{
+	const int swap_interval = (flags & DRM_MODE_PAGE_FLIP_ASYNC) ? 0 : 1;
+	struct drm_device *dev = crtc->dev;
+	struct nouveau_drm *drm = nouveau_drm(dev);
+	struct nouveau_bo *old_bo = nouveau_framebuffer(crtc->primary->fb)->nvbo;
+	struct nouveau_bo *new_bo = nouveau_framebuffer(fb)->nvbo;
+	struct nouveau_page_flip_state *s;
+	struct nouveau_channel *chan;
+	struct nouveau_cli *cli;
+	struct nouveau_fence *fence;
+	int ret;
+
+	chan = drm->channel;
+	if (!chan)
+		return -ENODEV;
+	cli = (void *)nvif_client(&chan->device->base);
+
+	s = kzalloc(sizeof(*s), GFP_KERNEL);
+	if (!s)
+		return -ENOMEM;
+
+	if (new_bo != old_bo) {
+		ret = nouveau_bo_pin(new_bo, TTM_PL_FLAG_VRAM, true);
+		if (ret)
+			goto fail_free;
+	}
+
+	mutex_lock(&cli->mutex);
+	ret = ttm_bo_reserve(&new_bo->bo, true, false, false, NULL);
+	if (ret)
+		goto fail_unpin;
+
+	/* synchronise rendering channel with the kernel's channel */
+	ret = nouveau_fence_sync(new_bo, chan, false, true);
+	if (ret) {
+		ttm_bo_unreserve(&new_bo->bo);
+		goto fail_unpin;
+	}
+
+	if (new_bo != old_bo) {
+		ttm_bo_unreserve(&new_bo->bo);
+
+		ret = ttm_bo_reserve(&old_bo->bo, true, false, false, NULL);
+		if (ret)
+			goto fail_unpin;
+	}
+
+	/* 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 };
+
+	/* Keep vblanks on during flip, for the target crtc of this flip */
+	drm_vblank_get(dev, nouveau_crtc(crtc)->index);
+
+	/* Emit a page flip */
+	if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA) {
+		ret = nv50_display_flip_next(crtc, fb, chan, swap_interval);
+		if (ret)
+			goto fail_unreserve;
+	} else {
+		struct nv04_display *dispnv04 = nv04_display(dev);
+		int head = nouveau_crtc(crtc)->index;
+
+		if (swap_interval) {
+			ret = RING_SPACE(chan, 8);
+			if (ret)
+				goto fail_unreserve;
+
+			BEGIN_NV04(chan, NvSubImageBlit, 0x012c, 1);
+			OUT_RING  (chan, 0);
+			BEGIN_NV04(chan, NvSubImageBlit, 0x0134, 1);
+			OUT_RING  (chan, head);
+			BEGIN_NV04(chan, NvSubImageBlit, 0x0100, 1);
+			OUT_RING  (chan, 0);
+			BEGIN_NV04(chan, NvSubImageBlit, 0x0130, 1);
+			OUT_RING  (chan, 0);
+		}
+
+		nouveau_bo_ref(new_bo, &dispnv04->image[head]);
+	}
+
+	ret = nouveau_page_flip_emit(chan, old_bo, new_bo, s, &fence);
+	if (ret)
+		goto fail_unreserve;
+	mutex_unlock(&cli->mutex);
+
+	/* Update the crtc struct and cleanup */
+	crtc->primary->fb = fb;
+
+	nouveau_bo_fence(old_bo, fence, false);
+	ttm_bo_unreserve(&old_bo->bo);
+	if (old_bo != new_bo)
+		nouveau_bo_unpin(old_bo);
+	nouveau_fence_unref(&fence);
+	return 0;
+
+fail_unreserve:
+	drm_vblank_put(dev, nouveau_crtc(crtc)->index);
+	ttm_bo_unreserve(&old_bo->bo);
+fail_unpin:
+	mutex_unlock(&cli->mutex);
+	if (old_bo != new_bo)
+		nouveau_bo_unpin(new_bo);
+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;
+	int crtcid = -1;
+
+	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) {
+		/* Vblank timestamps/counts are only correct on >= NV-50 */
+		if (drm->device.info.family >= NV_DEVICE_INFO_V0_TESLA)
+			crtcid = s->crtc;
+
+		drm_send_vblank_event(dev, crtcid, s->event);
+	}
+
+	/* Give up ownership of vblank for page-flipped crtc */
+	drm_vblank_put(dev, s->crtc);
+
+	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 (drm->device.info.family < NV_DEVICE_INFO_V0_TESLA) {
+			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;
+	uint32_t domain;
+	int ret;
+
+	args->pitch = roundup(args->width * (args->bpp / 8), 256);
+	args->size = args->pitch * args->height;
+	args->size = roundup(args->size, PAGE_SIZE);
+
+	/* Use VRAM if there is any ; otherwise fallback to system memory */
+	if (nouveau_drm(dev)->device.info.ram_size != 0)
+		domain = NOUVEAU_GEM_DOMAIN_VRAM;
+	else
+		domain = NOUVEAU_GEM_DOMAIN_GART;
+
+	ret = nouveau_gem_new(dev, args->size, 0, domain, 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_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 = nouveau_gem_object(gem);
+		*poffset = drm_vma_node_offset_addr(&bo->bo.vma_node);
+		drm_gem_object_unreference_unlocked(gem);
+		return 0;
+	}
+
+	return -ENOENT;
+}