drm/nouveau: Add DRM driver for NVIDIA GPUs

This adds a drm/kms staging non-API stable driver for GPUs from NVIDIA.

This driver is a KMS-based driver and requires a compatible nouveau
userspace libdrm and nouveau X.org driver.

This driver requires firmware files not available in this kernel tree,
interested parties can find them via the nouveau project git archive.

This driver is reverse engineered, and is in no way supported by nVidia.

Support for nearly the complete range of nvidia hw from nv04->g80 (nv50)
is available, and the kms driver should support driving nearly all
output types (displayport is under development still) along with supporting
suspend/resume.

This work is all from the upstream nouveau project found at
nouveau.freedesktop.org.

The original authors list from nouveau git tree is:
Anssi Hannula <anssi.hannula@iki.fi>
Ben Skeggs <bskeggs@redhat.com>
Francisco Jerez <currojerez@riseup.net>
Maarten Maathuis <madman2003@gmail.com>
Marcin Kościelnicki <koriakin@0x04.net>
Matthew Garrett <mjg@redhat.com>
Matt Parnell <mparnell@gmail.com>
Patrice Mandin <patmandin@gmail.com>
Pekka Paalanen <pq@iki.fi>
Xavier Chantry <shiningxc@gmail.com>
along with project founder Stephane Marchesin <marchesin@icps.u-strasbg.fr>

Signed-off-by: Ben Skeggs <bskeggs@redhat.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

76 files changed, 34498 insertions, 0 deletions

diff --git a/drivers/gpu/drm/nouveau/Kconfig b/drivers/gpu/drm/nouveau/Kconfig
new file mode 100644
index 00000000000..d823e631951
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/Kconfig
@@ -0,0 +1,44 @@
+config DRM_NOUVEAU
+	tristate "Nouveau (nVidia) cards"
+	depends on DRM
+        select FW_LOADER
+	select DRM_KMS_HELPER
+	select DRM_TTM
+	select FB_CFB_FILLRECT
+	select FB_CFB_COPYAREA
+	select FB_CFB_IMAGEBLIT
+	select FB
+	select FRAMEBUFFER_CONSOLE if !EMBEDDED
+	select FB_BACKLIGHT if DRM_NOUVEAU_BACKLIGHT
+	help
+	  Choose this option for open-source nVidia support.
+
+config DRM_NOUVEAU_BACKLIGHT
+	bool "Support for backlight control"
+	depends on DRM_NOUVEAU
+	default y
+	help
+	  Say Y here if you want to control the backlight of your display
+	  (e.g. a laptop panel).
+
+config DRM_NOUVEAU_DEBUG
+	bool "Build in Nouveau's debugfs support"
+	depends on DRM_NOUVEAU && DEBUG_FS
+	default y
+	help
+	  Say Y here if you want Nouveau to output debugging information
+	  via debugfs.
+
+menu "I2C encoder or helper chips"
+     depends on DRM
+
+config DRM_I2C_CH7006
+	tristate "Chrontel ch7006 TV encoder"
+	default m if DRM_NOUVEAU
+	help
+	  Support for Chrontel ch7006 and similar TV encoders, found
+	  on some nVidia video cards.
+
+	  This driver is currently only useful if you're also using
+	  the nouveau driver.
+endmenu
diff --git a/drivers/gpu/drm/nouveau/Makefile b/drivers/gpu/drm/nouveau/Makefile
new file mode 100644
index 00000000000..1d90d4d0144
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/Makefile
@@ -0,0 +1,31 @@
+#
+# Makefile for the drm device driver.  This driver provides support for the
+# Direct Rendering Infrastructure (DRI) in XFree86 4.1.0 and higher.
+
+ccflags-y := -Iinclude/drm
+nouveau-y := nouveau_drv.o nouveau_state.o nouveau_channel.o nouveau_mem.o \
+             nouveau_object.o nouveau_irq.o nouveau_notifier.o \
+             nouveau_sgdma.o nouveau_dma.o \
+             nouveau_bo.o nouveau_fence.o nouveau_gem.o nouveau_ttm.o \
+             nouveau_hw.o nouveau_calc.o nouveau_bios.o nouveau_i2c.o \
+	     nouveau_display.o nouveau_connector.o nouveau_fbcon.o \
+	     nouveau_dp.o \
+             nv04_timer.o \
+             nv04_mc.o nv40_mc.o nv50_mc.o \
+             nv04_fb.o nv10_fb.o nv40_fb.o \
+             nv04_fifo.o nv10_fifo.o nv40_fifo.o nv50_fifo.o \
+             nv04_graph.o nv10_graph.o nv20_graph.o \
+             nv40_graph.o nv50_graph.o \
+             nv04_instmem.o nv50_instmem.o \
+             nv50_crtc.o nv50_dac.o nv50_sor.o \
+             nv50_cursor.o nv50_display.o nv50_fbcon.o \
+             nv04_dac.o nv04_dfp.o nv04_tv.o nv17_tv.o nv17_tv_modes.o \
+             nv04_crtc.o nv04_display.o nv04_cursor.o nv04_fbcon.o \
+             nv17_gpio.o
+
+nouveau-$(CONFIG_DRM_NOUVEAU_DEBUG) += nouveau_debugfs.o
+nouveau-$(CONFIG_COMPAT) += nouveau_ioc32.o
+nouveau-$(CONFIG_DRM_NOUVEAU_BACKLIGHT) += nouveau_backlight.o
+nouveau-$(CONFIG_ACPI) += nouveau_acpi.o
+
+obj-$(CONFIG_DRM_NOUVEAU)+= nouveau.o
diff --git a/drivers/gpu/drm/nouveau/nouveau_acpi.c b/drivers/gpu/drm/nouveau/nouveau_acpi.c
new file mode 100644
index 00000000000..1cf488247a1
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_acpi.c
@@ -0,0 +1,125 @@
+#include <linux/pci.h>
+#include <linux/acpi.h>
+#include <acpi/acpi_drivers.h>
+#include <acpi/acpi_bus.h>
+
+#include "drmP.h"
+#include "drm.h"
+#include "drm_sarea.h"
+#include "drm_crtc_helper.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+#include "nv50_display.h"
+
+#define NOUVEAU_DSM_SUPPORTED 0x00
+#define NOUVEAU_DSM_SUPPORTED_FUNCTIONS 0x00
+
+#define NOUVEAU_DSM_ACTIVE 0x01
+#define NOUVEAU_DSM_ACTIVE_QUERY 0x00
+
+#define NOUVEAU_DSM_LED 0x02
+#define NOUVEAU_DSM_LED_STATE 0x00
+#define NOUVEAU_DSM_LED_OFF 0x10
+#define NOUVEAU_DSM_LED_STAMINA 0x11
+#define NOUVEAU_DSM_LED_SPEED 0x12
+
+#define NOUVEAU_DSM_POWER 0x03
+#define NOUVEAU_DSM_POWER_STATE 0x00
+#define NOUVEAU_DSM_POWER_SPEED 0x01
+#define NOUVEAU_DSM_POWER_STAMINA 0x02
+
+static int nouveau_dsm(struct drm_device *dev, int func, int arg, int *result)
+{
+	static char muid[] = {
+		0xA0, 0xA0, 0x95, 0x9D, 0x60, 0x00, 0x48, 0x4D,
+		0xB3, 0x4D, 0x7E, 0x5F, 0xEA, 0x12, 0x9F, 0xD4,
+	};
+
+	struct pci_dev *pdev = dev->pdev;
+	struct acpi_handle *handle;
+	struct acpi_buffer output = { ACPI_ALLOCATE_BUFFER, NULL };
+	struct acpi_object_list input;
+	union acpi_object params[4];
+	union acpi_object *obj;
+	int err;
+
+	handle = DEVICE_ACPI_HANDLE(&pdev->dev);
+
+	if (!handle)
+		return -ENODEV;
+
+	input.count = 4;
+	input.pointer = params;
+	params[0].type = ACPI_TYPE_BUFFER;
+	params[0].buffer.length = sizeof(muid);
+	params[0].buffer.pointer = (char *)muid;
+	params[1].type = ACPI_TYPE_INTEGER;
+	params[1].integer.value = 0x00000102;
+	params[2].type = ACPI_TYPE_INTEGER;
+	params[2].integer.value = func;
+	params[3].type = ACPI_TYPE_INTEGER;
+	params[3].integer.value = arg;
+
+	err = acpi_evaluate_object(handle, "_DSM", &input, &output);
+	if (err) {
+		NV_INFO(dev, "failed to evaluate _DSM: %d\n", err);
+		return err;
+	}
+
+	obj = (union acpi_object *)output.pointer;
+
+	if (obj->type == ACPI_TYPE_INTEGER)
+		if (obj->integer.value == 0x80000002)
+			return -ENODEV;
+
+	if (obj->type == ACPI_TYPE_BUFFER) {
+		if (obj->buffer.length == 4 && result) {
+			*result = 0;
+			*result |= obj->buffer.pointer[0];
+			*result |= (obj->buffer.pointer[1] << 8);
+			*result |= (obj->buffer.pointer[2] << 16);
+			*result |= (obj->buffer.pointer[3] << 24);
+		}
+	}
+
+	kfree(output.pointer);
+	return 0;
+}
+
+int nouveau_hybrid_setup(struct drm_device *dev)
+{
+	int result;
+
+	if (nouveau_dsm(dev, NOUVEAU_DSM_ACTIVE, NOUVEAU_DSM_ACTIVE_QUERY,
+								&result))
+		return -ENODEV;
+
+	NV_INFO(dev, "_DSM hardware status gave 0x%x\n", result);
+
+	if (result & 0x1) {	/* Stamina mode - disable the external GPU */
+		nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_STAMINA,
+									NULL);
+		nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_STAMINA,
+									NULL);
+	} else {		/* Ensure that the external GPU is enabled */
+		nouveau_dsm(dev, NOUVEAU_DSM_LED, NOUVEAU_DSM_LED_SPEED, NULL);
+		nouveau_dsm(dev, NOUVEAU_DSM_POWER, NOUVEAU_DSM_POWER_SPEED,
+									NULL);
+	}
+
+	return 0;
+}
+
+bool nouveau_dsm_probe(struct drm_device *dev)
+{
+	int support = 0;
+
+	if (nouveau_dsm(dev, NOUVEAU_DSM_SUPPORTED,
+				NOUVEAU_DSM_SUPPORTED_FUNCTIONS, &support))
+		return false;
+
+	if (!support)
+		return false;
+
+	return true;
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_backlight.c b/drivers/gpu/drm/nouveau/nouveau_backlight.c
new file mode 100644
index 00000000000..20564f8cb0e
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_backlight.c
@@ -0,0 +1,155 @@
+/*
+ * Copyright (C) 2009 Red Hat <mjg@redhat.com>
+ *
+ * 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.
+ *
+ */
+
+/*
+ * Authors:
+ *  Matthew Garrett <mjg@redhat.com>
+ *
+ * Register locations derived from NVClock by Roderick Colenbrander
+ */
+
+#include <linux/backlight.h>
+
+#include "drmP.h"
+#include "nouveau_drv.h"
+#include "nouveau_drm.h"
+#include "nouveau_reg.h"
+
+static int nv40_get_intensity(struct backlight_device *bd)
+{
+	struct drm_device *dev = bl_get_data(bd);
+	int val = (nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK)
+									>> 16;
+
+	return val;
+}
+
+static int nv40_set_intensity(struct backlight_device *bd)
+{
+	struct drm_device *dev = bl_get_data(bd);
+	int val = bd->props.brightness;
+	int reg = nv_rd32(dev, NV40_PMC_BACKLIGHT);
+
+	nv_wr32(dev, NV40_PMC_BACKLIGHT,
+		 (val << 16) | (reg & ~NV40_PMC_BACKLIGHT_MASK));
+
+	return 0;
+}
+
+static struct backlight_ops nv40_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.get_brightness = nv40_get_intensity,
+	.update_status = nv40_set_intensity,
+};
+
+static int nv50_get_intensity(struct backlight_device *bd)
+{
+	struct drm_device *dev = bl_get_data(bd);
+
+	return nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT);
+}
+
+static int nv50_set_intensity(struct backlight_device *bd)
+{
+	struct drm_device *dev = bl_get_data(bd);
+	int val = bd->props.brightness;
+
+	nv_wr32(dev, NV50_PDISPLAY_SOR_BACKLIGHT,
+		val | NV50_PDISPLAY_SOR_BACKLIGHT_ENABLE);
+	return 0;
+}
+
+static struct backlight_ops nv50_bl_ops = {
+	.options = BL_CORE_SUSPENDRESUME,
+	.get_brightness = nv50_get_intensity,
+	.update_status = nv50_set_intensity,
+};
+
+static int nouveau_nv40_backlight_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct backlight_device *bd;
+
+	if (!(nv_rd32(dev, NV40_PMC_BACKLIGHT) & NV40_PMC_BACKLIGHT_MASK))
+		return 0;
+
+	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
+				       &nv40_bl_ops);
+	if (IS_ERR(bd))
+		return PTR_ERR(bd);
+
+	dev_priv->backlight = bd;
+	bd->props.max_brightness = 31;
+	bd->props.brightness = nv40_get_intensity(bd);
+	backlight_update_status(bd);
+
+	return 0;
+}
+
+static int nouveau_nv50_backlight_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+	struct backlight_device *bd;
+
+	if (!nv_rd32(dev, NV50_PDISPLAY_SOR_BACKLIGHT))
+		return 0;
+
+	bd = backlight_device_register("nv_backlight", &dev->pdev->dev, dev,
+				       &nv50_bl_ops);
+	if (IS_ERR(bd))
+		return PTR_ERR(bd);
+
+	dev_priv->backlight = bd;
+	bd->props.max_brightness = 1025;
+	bd->props.brightness = nv50_get_intensity(bd);
+	backlight_update_status(bd);
+	return 0;
+}
+
+int nouveau_backlight_init(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+	switch (dev_priv->card_type) {
+	case NV_40:
+		return nouveau_nv40_backlight_init(dev);
+	case NV_50:
+		return nouveau_nv50_backlight_init(dev);
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+void nouveau_backlight_exit(struct drm_device *dev)
+{
+	struct drm_nouveau_private *dev_priv = dev->dev_private;
+
+	if (dev_priv->backlight) {
+		backlight_device_unregister(dev_priv->backlight);
+		dev_priv->backlight = NULL;
+	}
+}
diff --git a/drivers/gpu/drm/nouveau/nouveau_bios.c b/drivers/gpu/drm/nouveau/nouveau_bios.c
new file mode 100644
index 00000000000..5eec5ed6948
--- /dev/null
+++ b/drivers/gpu/drm/nouveau/nouveau_bios.c
@@ -0,0 +1,6095 @@
+/*
+ * Copyright 2005-2006 Erik Waling
+ * Copyright 2006 Stephane Marchesin
+ * Copyright 2007-2009 Stuart Bennett
+ *
+ * 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 AUTHORS 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"
+#define NV_DEBUG_NOTRACE
+#include "nouveau_drv.h"
+#include "nouveau_hw.h"
+
+/* these defines are made up */
+#define NV_CIO_CRE_44_HEADA 0x0
+#define NV_CIO_CRE_44_HEADB 0x3
+#define FEATURE_MOBILE 0x10	/* also FEATURE_QUADRO for BMP */
+#define LEGACY_I2C_CRT 0x80
+#define LEGACY_I2C_PANEL 0x81
+#define LEGACY_I2C_TV 0x82
+
+#define EDID1_LEN 128
+
+#define BIOSLOG(sip, fmt, arg...) NV_DEBUG(sip->dev, fmt, ##arg)
+#define LOG_OLD_VALUE(x)
+
+#define ROM16(x) le16_to_cpu(*(uint16_t *)&(x))
+#define ROM32(x) le32_to_cpu(*(uint32_t *)&(x))
+
+struct init_exec {
+	bool execute;
+	bool repeat;
+};
+
+static bool nv_cksum(const uint8_t *data, unsigned int length)
+{
+	/*
+	 * There's a few checksums in the BIOS, so here's a generic checking
+	 * function.
+	 */
+	int i;
+	uint8_t sum = 0;
+
+	for (i = 0; i < length; i++)
+		sum += data[i];<