[mirror_ubuntu-hirsute-kernel.git] / drivers / gpu / host1x / drm / drm.c

/*
 * Copyright (C) 2012 Avionic Design GmbH
 * Copyright (C) 2012-2013 NVIDIA CORPORATION.  All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */

#include <linux/module.h>
#include <linux/of_address.h>
#include <linux/of_platform.h>

#include <linux/dma-mapping.h>
#include <asm/dma-iommu.h>

#include <drm/drm.h>
#include <drm/drmP.h>

#include "host1x_client.h"
#include "dev.h"
#include "drm.h"
#include "gem.h"
#include "syncpt.h"

#define DRIVER_NAME "tegra"
#define DRIVER_DESC "NVIDIA Tegra graphics"
#define DRIVER_DATE "20120330"
#define DRIVER_MAJOR 0
#define DRIVER_MINOR 0
#define DRIVER_PATCHLEVEL 0

struct host1x_drm_client {
	struct host1x_client *client;
	struct device_node *np;
	struct list_head list;
};

static int host1x_add_drm_client(struct host1x_drm *host1x,
				 struct device_node *np)
{
	struct host1x_drm_client *client;

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

	INIT_LIST_HEAD(&client->list);
	client->np = of_node_get(np);

	list_add_tail(&client->list, &host1x->drm_clients);

	return 0;
}

static int host1x_activate_drm_client(struct host1x_drm *host1x,
				      struct host1x_drm_client *drm,
				      struct host1x_client *client)
{
	mutex_lock(&host1x->drm_clients_lock);
	list_del_init(&drm->list);
	list_add_tail(&drm->list, &host1x->drm_active);
	drm->client = client;
	mutex_unlock(&host1x->drm_clients_lock);

	return 0;
}

static int host1x_remove_drm_client(struct host1x_drm *host1x,
				    struct host1x_drm_client *client)
{
	mutex_lock(&host1x->drm_clients_lock);
	list_del_init(&client->list);
	mutex_unlock(&host1x->drm_clients_lock);

	of_node_put(client->np);
	kfree(client);

	return 0;
}

static int host1x_parse_dt(struct host1x_drm *host1x)
{
	static const char * const compat[] = {
		"nvidia,tegra20-dc",
		"nvidia,tegra20-hdmi",
		"nvidia,tegra20-gr2d",
		"nvidia,tegra30-dc",
		"nvidia,tegra30-hdmi",
		"nvidia,tegra30-gr2d",
	};
	unsigned int i;
	int err;

	for (i = 0; i < ARRAY_SIZE(compat); i++) {
		struct device_node *np;

		for_each_child_of_node(host1x->dev->of_node, np) {
			if (of_device_is_compatible(np, compat[i]) &&
			    of_device_is_available(np)) {
				err = host1x_add_drm_client(host1x, np);
				if (err < 0)
					return err;
			}
		}
	}

	return 0;
}

int host1x_drm_alloc(struct platform_device *pdev)
{
	struct host1x_drm *host1x;
	int err;

	host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
	if (!host1x)
		return -ENOMEM;

	mutex_init(&host1x->drm_clients_lock);
	INIT_LIST_HEAD(&host1x->drm_clients);
	INIT_LIST_HEAD(&host1x->drm_active);
	mutex_init(&host1x->clients_lock);
	INIT_LIST_HEAD(&host1x->clients);
	host1x->dev = &pdev->dev;

	err = host1x_parse_dt(host1x);
	if (err < 0) {
		dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
		return err;
	}

	host1x_set_drm_data(&pdev->dev, host1x);

	return 0;
}

int host1x_drm_init(struct host1x_drm *host1x, struct drm_device *drm)
{
	struct host1x_client *client;

	mutex_lock(&host1x->clients_lock);

	list_for_each_entry(client, &host1x->clients, list) {
		if (client->ops && client->ops->drm_init) {
			int err = client->ops->drm_init(client, drm);
			if (err < 0) {
				dev_err(host1x->dev,
					"DRM setup failed for %s: %d\n",
					dev_name(client->dev), err);
				return err;
			}
		}
	}

	mutex_unlock(&host1x->clients_lock);

	return 0;
}

int host1x_drm_exit(struct host1x_drm *host1x)
{
	struct platform_device *pdev = to_platform_device(host1x->dev);
	struct host1x_client *client;

	if (!host1x->drm)
		return 0;

	mutex_lock(&host1x->clients_lock);

	list_for_each_entry_reverse(client, &host1x->clients, list) {
		if (client->ops && client->ops->drm_exit) {
			int err = client->ops->drm_exit(client);
			if (err < 0) {
				dev_err(host1x->dev,
					"DRM cleanup failed for %s: %d\n",
					dev_name(client->dev), err);
				return err;
			}
		}
	}

	mutex_unlock(&host1x->clients_lock);

	drm_platform_exit(&tegra_drm_driver, pdev);
	host1x->drm = NULL;

	return 0;
}

int host1x_register_client(struct host1x_drm *host1x,
			   struct host1x_client *client)
{
	struct host1x_drm_client *drm, *tmp;
	int err;

	mutex_lock(&host1x->clients_lock);
	list_add_tail(&client->list, &host1x->clients);
	mutex_unlock(&host1x->clients_lock);

	list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
		if (drm->np == client->dev->of_node)
			host1x_activate_drm_client(host1x, drm, client);

	if (list_empty(&host1x->drm_clients)) {
		struct platform_device *pdev = to_platform_device(host1x->dev);

		err = drm_platform_init(&tegra_drm_driver, pdev);
		if (err < 0) {
			dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
			return err;
		}
	}

	return 0;
}

int host1x_unregister_client(struct host1x_drm *host1x,
			     struct host1x_client *client)
{
	struct host1x_drm_client *drm, *tmp;
	int err;

	list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
		if (drm->client == client) {
			err = host1x_drm_exit(host1x);
			if (err < 0) {
				dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
					err);
				return err;
			}

			host1x_remove_drm_client(host1x, drm);
			break;
		}
	}

	mutex_lock(&host1x->clients_lock);
	list_del_init(&client->list);
	mutex_unlock(&host1x->clients_lock);

	return 0;
}

static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
{
	struct host1x_drm *host1x;
	int err;

	host1x = host1x_get_drm_data(drm->dev);
	drm->dev_private = host1x;
	host1x->drm = drm;

	drm_mode_config_init(drm);

	err = host1x_drm_init(host1x, drm);
	if (err < 0)
		return err;

	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
	if (err < 0)
		return err;

	err = tegra_drm_fb_init(drm);
	if (err < 0)
		return err;

	drm_kms_helper_poll_init(drm);

	return 0;
}

static int tegra_drm_unload(struct drm_device *drm)
{
	drm_kms_helper_poll_fini(drm);
	tegra_drm_fb_exit(drm);

	drm_mode_config_cleanup(drm);

	return 0;
}

static int tegra_drm_open(struct drm_device *drm, struct drm_file *filp)
{
	struct host1x_drm_file *fpriv;

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

	INIT_LIST_HEAD(&fpriv->contexts);
	filp->driver_priv = fpriv;

	return 0;
}

static void host1x_drm_context_free(struct host1x_drm_context *context)
{
	context->client->ops->close_channel(context);
	kfree(context);
}

static void tegra_drm_lastclose(struct drm_device *drm)
{
	struct host1x_drm *host1x = drm->dev_private;

	tegra_fbdev_restore_mode(host1x->fbdev);
}

#ifdef CONFIG_DRM_TEGRA_STAGING
static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
					 struct host1x_drm_context *context)
{
	struct host1x_drm_context *ctx;

	list_for_each_entry(ctx, &file->contexts, list)
		if (ctx == context)
			return true;

	return false;
}

static int tegra_gem_create(struct drm_device *drm, void *data,
			    struct drm_file *file)
{
	struct drm_tegra_gem_create *args = data;
	struct tegra_bo *bo;

	bo = tegra_bo_create_with_handle(file, drm, args->size,
					 &args->handle);
	if (IS_ERR(bo))
		return PTR_ERR(bo);

	return 0;
}

static int tegra_gem_mmap(struct drm_device *drm, void *data,
			  struct drm_file *file)
{
	struct drm_tegra_gem_mmap *args = data;
	struct drm_gem_object *gem;
	struct tegra_bo *bo;

	gem = drm_gem_object_lookup(drm, file, args->handle);
	if (!gem)
		return -EINVAL;

	bo = to_tegra_bo(gem);

	args->offset = tegra_bo_get_mmap_offset(bo);

	drm_gem_object_unreference(gem);

	return 0;
}

static int tegra_syncpt_read(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_read *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	args->value = host1x_syncpt_read_min(sp);
	return 0;
}

static int tegra_syncpt_incr(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_incr *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	host1x_syncpt_incr(sp);
	return 0;
}

static int tegra_syncpt_wait(struct drm_device *drm, void *data,
			     struct drm_file *file)
{
	struct drm_tegra_syncpt_wait *args = data;
	struct host1x *host = dev_get_drvdata(drm->dev);
	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);

	if (!sp)
		return -EINVAL;

	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
				  &args->value);
}

static int tegra_open_channel(struct drm_device *drm, void *data,
			      struct drm_file *file)
{
	struct drm_tegra_open_channel *args = data;
	struct host1x_client *client;
	struct host1x_drm_context *context;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm *host1x = drm->dev_private;
	int err = -ENODEV;

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

	list_for_each_entry(client, &host1x->clients, list)
		if (client->class == args->client) {
			err = client->ops->open_channel(client, context);
			if (err)
				break;

			context->client = client;
			list_add(&context->list, &fpriv->contexts);
			args->context = (uintptr_t)context;
			return 0;
		}

	kfree(context);
	return err;
}

static int tegra_close_channel(struct drm_device *drm, void *data,
			       struct drm_file *file)
{
	struct drm_tegra_close_channel *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -EINVAL;

	list_del(&context->list);
	host1x_drm_context_free(context);

	return 0;
}

static int tegra_get_syncpt(struct drm_device *drm, void *data,
			    struct drm_file *file)
{
	struct drm_tegra_get_syncpt *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;
	struct host1x_syncpt *syncpt;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -ENODEV;

	if (args->index >= context->client->num_syncpts)
		return -EINVAL;

	syncpt = context->client->syncpts[args->index];
	args->id = host1x_syncpt_id(syncpt);

	return 0;
}

static int tegra_submit(struct drm_device *drm, void *data,
			struct drm_file *file)
{
	struct drm_tegra_submit *args = data;
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context =
		(struct host1x_drm_context *)(uintptr_t)args->context;

	if (!host1x_drm_file_owns_context(fpriv, context))
		return -ENODEV;

	return context->client->ops->submit(context, args, drm, file);
}
#endif

static struct drm_ioctl_desc tegra_drm_ioctls[] = {
#ifdef CONFIG_DRM_TEGRA_STAGING
	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED | DRM_AUTH),
	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
#endif
};

static const struct file_operations tegra_drm_fops = {
	.owner = THIS_MODULE,
	.open = drm_open,
	.release = drm_release,
	.unlocked_ioctl = drm_ioctl,
	.mmap = tegra_drm_mmap,
	.poll = drm_poll,
	.fasync = drm_fasync,
	.read = drm_read,
#ifdef CONFIG_COMPAT
	.compat_ioctl = drm_compat_ioctl,
#endif
	.llseek = noop_llseek,
};

static struct drm_crtc *tegra_crtc_from_pipe(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
		struct tegra_dc *dc = to_tegra_dc(crtc);

		if (dc->pipe == pipe)
			return crtc;
	}

	return NULL;
}

static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
{
	/* TODO: implement real hardware counter using syncpoints */
	return drm_vblank_count(dev, crtc);
}

static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	struct tegra_dc *dc = to_tegra_dc(crtc);

	if (!crtc)
		return -ENODEV;

	tegra_dc_enable_vblank(dc);

	return 0;
}

static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
{
	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	struct tegra_dc *dc = to_tegra_dc(crtc);

	if (crtc)
		tegra_dc_disable_vblank(dc);
}

static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file)
{
	struct host1x_drm_file *fpriv = file->driver_priv;
	struct host1x_drm_context *context, *tmp;
	struct drm_crtc *crtc;

	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
		tegra_dc_cancel_page_flip(crtc, file);

	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
		host1x_drm_context_free(context);

	kfree(fpriv);
}

#ifdef CONFIG_DEBUG_FS
static int tegra_debugfs_framebuffers(struct seq_file *s, void *data)
{
	struct drm_info_node *node = (struct drm_info_node *)s->private;
	struct drm_device *drm = node->minor->dev;
	struct drm_framebuffer *fb;

	mutex_lock(&drm->mode_config.fb_lock);

	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
		seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
			   fb->base.id, fb->width, fb->height, fb->depth,
			   fb->bits_per_pixel,
			   atomic_read(&fb->refcount.refcount));
	}

	mutex_unlock(&drm->mode_config.fb_lock);

	return 0;
}

static struct drm_info_list tegra_debugfs_list[] = {
	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
};

static int tegra_debugfs_init(struct drm_minor *minor)
{
	return drm_debugfs_create_files(tegra_debugfs_list,
					ARRAY_SIZE(tegra_debugfs_list),
					minor->debugfs_root, minor);
}

static void tegra_debugfs_cleanup(struct drm_minor *minor)
{
	drm_debugfs_remove_files(tegra_debugfs_list,
				 ARRAY_SIZE(tegra_debugfs_list), minor);
}
#endif

struct drm_driver tegra_drm_driver = {
	.driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM,
	.load = tegra_drm_load,
	.unload = tegra_drm_unload,
	.open = tegra_drm_open,
	.preclose = tegra_drm_preclose,
	.lastclose = tegra_drm_lastclose,

	.get_vblank_counter = tegra_drm_get_vblank_counter,
	.enable_vblank = tegra_drm_enable_vblank,
	.disable_vblank = tegra_drm_disable_vblank,

#if defined(CONFIG_DEBUG_FS)
	.debugfs_init = tegra_debugfs_init,
	.debugfs_cleanup = tegra_debugfs_cleanup,
#endif

	.gem_free_object = tegra_bo_free_object,
	.gem_vm_ops = &tegra_bo_vm_ops,
	.dumb_create = tegra_bo_dumb_create,
	.dumb_map_offset = tegra_bo_dumb_map_offset,
	.dumb_destroy = tegra_bo_dumb_destroy,

	.ioctls = tegra_drm_ioctls,
	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
	.fops = &tegra_drm_fops,

	.name = DRIVER_NAME,
	.desc = DRIVER_DESC,
	.date = DRIVER_DATE,
	.major = DRIVER_MAJOR,
	.minor = DRIVER_MINOR,
	.patchlevel = DRIVER_PATCHLEVEL,
};
Commit	Line	Data
d8f4a9ed TR	1	/*
d8f4a9ed TR	2	* Copyright (C) 2012 Avionic Design GmbH
d43f81cb	3	* Copyright (C) 2012-2013 NVIDIA CORPORATION. All rights reserved.
d8f4a9ed TR	4	*
	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License version 2 as
	7	* published by the Free Software Foundation.
	8	*/
	9
	10	#include <linux/module.h>
	11	#include <linux/of_address.h>
	12	#include <linux/of_platform.h>
	13
d8f4a9ed TR	14	#include <linux/dma-mapping.h>
	15	#include <asm/dma-iommu.h>
	16
d43f81cb TB	17	#include <drm/drm.h>
	18	#include <drm/drmP.h>
	19
692e6d7b	20	#include "host1x_client.h"
de2ba664	21	#include "dev.h"
d8f4a9ed	22	#include "drm.h"
de2ba664 AM	23	#include "gem.h"
de2ba664 AM	24	#include "syncpt.h"
d8f4a9ed TR	25
	26	#define DRIVER_NAME "tegra"
	27	#define DRIVER_DESC "NVIDIA Tegra graphics"
	28	#define DRIVER_DATE "20120330"
	29	#define DRIVER_MAJOR 0
	30	#define DRIVER_MINOR 0
	31	#define DRIVER_PATCHLEVEL 0
	32
692e6d7b TB	33	struct host1x_drm_client {
	34	struct host1x_client *client;
	35	struct device_node *np;
	36	struct list_head list;
	37	};
	38
	39	static int host1x_add_drm_client(struct host1x_drm *host1x,
	40	struct device_node *np)
	41	{
	42	struct host1x_drm_client *client;
	43
	44	client = kzalloc(sizeof(*client), GFP_KERNEL);
	45	if (!client)
	46	return -ENOMEM;
	47
	48	INIT_LIST_HEAD(&client->list);
	49	client->np = of_node_get(np);
	50
	51	list_add_tail(&client->list, &host1x->drm_clients);
	52
	53	return 0;
	54	}
	55
	56	static int host1x_activate_drm_client(struct host1x_drm *host1x,
	57	struct host1x_drm_client *drm,
	58	struct host1x_client *client)
	59	{
	60	mutex_lock(&host1x->drm_clients_lock);
	61	list_del_init(&drm->list);
	62	list_add_tail(&drm->list, &host1x->drm_active);
	63	drm->client = client;
	64	mutex_unlock(&host1x->drm_clients_lock);
	65
	66	return 0;
	67	}
	68
	69	static int host1x_remove_drm_client(struct host1x_drm *host1x,
	70	struct host1x_drm_client *client)
	71	{
	72	mutex_lock(&host1x->drm_clients_lock);
	73	list_del_init(&client->list);
	74	mutex_unlock(&host1x->drm_clients_lock);
	75
	76	of_node_put(client->np);
	77	kfree(client);
	78
	79	return 0;
	80	}
	81
	82	static int host1x_parse_dt(struct host1x_drm *host1x)
	83	{
	84	static const char * const compat[] = {
	85	"nvidia,tegra20-dc",
	86	"nvidia,tegra20-hdmi",
d43f81cb	87	"nvidia,tegra20-gr2d",
692e6d7b TB	88	"nvidia,tegra30-dc",
692e6d7b TB	89	"nvidia,tegra30-hdmi",
d43f81cb	90	"nvidia,tegra30-gr2d",
692e6d7b TB	91	};
	92	unsigned int i;
	93	int err;
	94
	95	for (i = 0; i < ARRAY_SIZE(compat); i++) {
	96	struct device_node *np;
	97
	98	for_each_child_of_node(host1x->dev->of_node, np) {
	99	if (of_device_is_compatible(np, compat[i]) &&
	100	of_device_is_available(np)) {
	101	err = host1x_add_drm_client(host1x, np);
	102	if (err < 0)
	103	return err;
	104	}
	105	}
	106	}
	107
	108	return 0;
	109	}
	110
	111	int host1x_drm_alloc(struct platform_device *pdev)
	112	{
	113	struct host1x_drm *host1x;
	114	int err;
	115
	116	host1x = devm_kzalloc(&pdev->dev, sizeof(*host1x), GFP_KERNEL);
	117	if (!host1x)
	118	return -ENOMEM;
	119
	120	mutex_init(&host1x->drm_clients_lock);
	121	INIT_LIST_HEAD(&host1x->drm_clients);
	122	INIT_LIST_HEAD(&host1x->drm_active);
	123	mutex_init(&host1x->clients_lock);
	124	INIT_LIST_HEAD(&host1x->clients);
	125	host1x->dev = &pdev->dev;
	126
	127	err = host1x_parse_dt(host1x);
	128	if (err < 0) {
	129	dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
	130	return err;
	131	}
	132
	133	host1x_set_drm_data(&pdev->dev, host1x);
	134
	135	return 0;
	136	}
	137
	138	int host1x_drm_init(struct host1x_drm host1x, struct drm_device drm)
	139	{
	140	struct host1x_client *client;
	141
	142	mutex_lock(&host1x->clients_lock);
	143
	144	list_for_each_entry(client, &host1x->clients, list) {
	145	if (client->ops && client->ops->drm_init) {
	146	int err = client->ops->drm_init(client, drm);
	147	if (err < 0) {
	148	dev_err(host1x->dev,
	149	"DRM setup failed for %s: %d\n",
	150	dev_name(client->dev), err);
	151	return err;
	152	}
	153	}
	154	}
155
156	mutex_unlock(&host1x->clients_lock);
157
158	return 0;
159	}
160
161	int host1x_drm_exit(struct host1x_drm *host1x)
162	{
163	struct platform_device *pdev = to_platform_device(host1x->dev);
164	struct host1x_client *client;
165
166	if (!host1x->drm)
167	return 0;
168
169	mutex_lock(&host1x->clients_lock);
170
171	list_for_each_entry_reverse(client, &host1x->clients, list) {
172	if (client->ops && client->ops->drm_exit) {
173	int err = client->ops->drm_exit(client);
174	if (err < 0) {
175	dev_err(host1x->dev,
176	"DRM cleanup failed for %s: %d\n",
177	dev_name(client->dev), err);
178	return err;
179	}
180	}
181	}
182
183	mutex_unlock(&host1x->clients_lock);
184
185	drm_platform_exit(&tegra_drm_driver, pdev);
186	host1x->drm = NULL;
187
188	return 0;
189	}
190
191	int host1x_register_client(struct host1x_drm *host1x,
192	struct host1x_client *client)
193	{
194	struct host1x_drm_client drm, tmp;
195	int err;
196
197	mutex_lock(&host1x->clients_lock);
198	list_add_tail(&client->list, &host1x->clients);
199	mutex_unlock(&host1x->clients_lock);
200
201	list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
202	if (drm->np == client->dev->of_node)
203	host1x_activate_drm_client(host1x, drm, client);
204
205	if (list_empty(&host1x->drm_clients)) {
206	struct platform_device *pdev = to_platform_device(host1x->dev);
207
208	err = drm_platform_init(&tegra_drm_driver, pdev);
209	if (err < 0) {
210	dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
211	return err;
212	}
213	}
214
215	return 0;
216	}
217
218	int host1x_unregister_client(struct host1x_drm *host1x,
219	struct host1x_client *client)
220	{
221	struct host1x_drm_client drm, tmp;
222	int err;
223
224	list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
225	if (drm->client == client) {
226	err = host1x_drm_exit(host1x);
227	if (err < 0) {
228	dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
229	err);
230	return err;
231	}
232
233	host1x_remove_drm_client(host1x, drm);
234	break;
235	}
236	}
237
238	mutex_lock(&host1x->clients_lock);
239	list_del_init(&client->list);
240	mutex_unlock(&host1x->clients_lock);
241
242	return 0;
243	}
244
d8f4a9ed TR	245	static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
d8f4a9ed TR	246	{
c89c0ea6	247	struct host1x_drm *host1x;
d8f4a9ed TR	248	int err;
d8f4a9ed TR	249
692e6d7b	250	host1x = host1x_get_drm_data(drm->dev);
d8f4a9ed TR	251	drm->dev_private = host1x;
	252	host1x->drm = drm;
	253
	254	drm_mode_config_init(drm);
	255
	256	err = host1x_drm_init(host1x, drm);
	257	if (err < 0)
	258	return err;
	259
6e5ff998 TR	260	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
	261	if (err < 0)
	262	return err;
	263
d8f4a9ed TR	264	err = tegra_drm_fb_init(drm);
	265	if (err < 0)
	266	return err;
	267
	268	drm_kms_helper_poll_init(drm);
	269
	270	return 0;
	271	}
	272
	273	static int tegra_drm_unload(struct drm_device *drm)
	274	{
	275	drm_kms_helper_poll_fini(drm);
	276	tegra_drm_fb_exit(drm);
	277
	278	drm_mode_config_cleanup(drm);
	279
	280	return 0;
	281	}
	282
	283	static int tegra_drm_open(struct drm_device drm, struct drm_file filp)
	284	{
d43f81cb TB	285	struct host1x_drm_file *fpriv;
	286
	287	fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
	288	if (!fpriv)
	289	return -ENOMEM;
	290
	291	INIT_LIST_HEAD(&fpriv->contexts);
	292	filp->driver_priv = fpriv;
	293
d8f4a9ed TR	294	return 0;
	295	}
	296
d43f81cb TB	297	static void host1x_drm_context_free(struct host1x_drm_context *context)
	298	{
	299	context->client->ops->close_channel(context);
	300	kfree(context);
	301	}
	302
d8f4a9ed TR	303	static void tegra_drm_lastclose(struct drm_device *drm)
d8f4a9ed TR	304	{
c89c0ea6	305	struct host1x_drm *host1x = drm->dev_private;
d8f4a9ed	306
de2ba664	307	tegra_fbdev_restore_mode(host1x->fbdev);
d8f4a9ed TR	308	}
d8f4a9ed TR	309
d43f81cb TB	310	#ifdef CONFIG_DRM_TEGRA_STAGING
	311	static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
	312	struct host1x_drm_context *context)
	313	{
	314	struct host1x_drm_context *ctx;
	315
	316	list_for_each_entry(ctx, &file->contexts, list)
	317	if (ctx == context)
	318	return true;
	319
	320	return false;
	321	}
	322
	323	static int tegra_gem_create(struct drm_device drm, void data,
	324	struct drm_file *file)
	325	{
	326	struct drm_tegra_gem_create *args = data;
	327	struct tegra_bo *bo;
	328
	329	bo = tegra_bo_create_with_handle(file, drm, args->size,
	330	&args->handle);
	331	if (IS_ERR(bo))
	332	return PTR_ERR(bo);
	333
	334	return 0;
	335	}
	336
	337	static int tegra_gem_mmap(struct drm_device drm, void data,
	338	struct drm_file *file)
	339	{
	340	struct drm_tegra_gem_mmap *args = data;
	341	struct drm_gem_object *gem;
	342	struct tegra_bo *bo;
	343
	344	gem = drm_gem_object_lookup(drm, file, args->handle);
	345	if (!gem)
	346	return -EINVAL;
	347
	348	bo = to_tegra_bo(gem);
	349
	350	args->offset = tegra_bo_get_mmap_offset(bo);
	351
	352	drm_gem_object_unreference(gem);
	353
	354	return 0;
	355	}
	356
	357	static int tegra_syncpt_read(struct drm_device drm, void data,
	358	struct drm_file *file)
	359	{
	360	struct drm_tegra_syncpt_read *args = data;
	361	struct host1x *host = dev_get_drvdata(drm->dev);
	362	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
	363
	364	if (!sp)
	365	return -EINVAL;
	366
	367	args->value = host1x_syncpt_read_min(sp);
	368	return 0;
	369	}
	370
	371	static int tegra_syncpt_incr(struct drm_device drm, void data,
	372	struct drm_file *file)
	373	{
374	struct drm_tegra_syncpt_incr *args = data;
375	struct host1x *host = dev_get_drvdata(drm->dev);
376	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
377
378	if (!sp)
379	return -EINVAL;
380
381	host1x_syncpt_incr(sp);
382	return 0;
383	}
384
385	static int tegra_syncpt_wait(struct drm_device drm, void data,
386	struct drm_file *file)
387	{
388	struct drm_tegra_syncpt_wait *args = data;
389	struct host1x *host = dev_get_drvdata(drm->dev);
390	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
391
392	if (!sp)
393	return -EINVAL;
394
395	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
396	&args->value);
397	}
398
399	static int tegra_open_channel(struct drm_device drm, void data,
400	struct drm_file *file)
401	{
402	struct drm_tegra_open_channel *args = data;
403	struct host1x_client *client;
404	struct host1x_drm_context *context;
405	struct host1x_drm_file *fpriv = file->driver_priv;
406	struct host1x_drm *host1x = drm->dev_private;
407	int err = -ENODEV;
408
409	context = kzalloc(sizeof(*context), GFP_KERNEL);
410	if (!context)
411	return -ENOMEM;
412
413	list_for_each_entry(client, &host1x->clients, list)
414	if (client->class == args->client) {
415	err = client->ops->open_channel(client, context);
416	if (err)
417	break;
418
419	context->client = client;
420	list_add(&context->list, &fpriv->contexts);
421	args->context = (uintptr_t)context;
422	return 0;
423	}
424
425	kfree(context);
426	return err;
427	}
428
429	static int tegra_close_channel(struct drm_device drm, void data,
430	struct drm_file *file)
431	{
432	struct drm_tegra_close_channel *args = data;
433	struct host1x_drm_file *fpriv = file->driver_priv;
434	struct host1x_drm_context *context =
435	(struct host1x_drm_context *)(uintptr_t)args->context;
436
437	if (!host1x_drm_file_owns_context(fpriv, context))
438	return -EINVAL;
439
440	list_del(&context->list);
441	host1x_drm_context_free(context);
442
443	return 0;
444	}
445
446	static int tegra_get_syncpt(struct drm_device drm, void data,
447	struct drm_file *file)
448	{
449	struct drm_tegra_get_syncpt *args = data;
450	struct host1x_drm_file *fpriv = file->driver_priv;
451	struct host1x_drm_context *context =
452	(struct host1x_drm_context *)(uintptr_t)args->context;
453	struct host1x_syncpt *syncpt;
454
455	if (!host1x_drm_file_owns_context(fpriv, context))
456	return -ENODEV;
457
458	if (args->index >= context->client->num_syncpts)
459	return -EINVAL;
460
461	syncpt = context->client->syncpts[args->index];
462	args->id = host1x_syncpt_id(syncpt);
463
464	return 0;
465	}
466
467	static int tegra_submit(struct drm_device drm, void data,
468	struct drm_file *file)
469	{
470	struct drm_tegra_submit *args = data;
471	struct host1x_drm_file *fpriv = file->driver_priv;
472	struct host1x_drm_context *context =
473	(struct host1x_drm_context *)(uintptr_t)args->context;
474
475	if (!host1x_drm_file_owns_context(fpriv, context))
476	return -ENODEV;
477
478	return context->client->ops->submit(context, args, drm, file);
479	}
480	#endif
481
d8f4a9ed	482	static struct drm_ioctl_desc tegra_drm_ioctls[] = {
d43f81cb TB	483	#ifdef CONFIG_DRM_TEGRA_STAGING
	484	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED \| DRM_AUTH),
	485	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
	486	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
	487	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
	488	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
	489	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
	490	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
	491	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
	492	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
	493	#endif
d8f4a9ed TR	494	};
	495
	496	static const struct file_operations tegra_drm_fops = {
	497	.owner = THIS_MODULE,
	498	.open = drm_open,
	499	.release = drm_release,
	500	.unlocked_ioctl = drm_ioctl,
de2ba664	501	.mmap = tegra_drm_mmap,
d8f4a9ed TR	502	.poll = drm_poll,
	503	.fasync = drm_fasync,
	504	.read = drm_read,
	505	#ifdef CONFIG_COMPAT
	506	.compat_ioctl = drm_compat_ioctl,
	507	#endif
	508	.llseek = noop_llseek,
	509	};
	510
6e5ff998 TR	511	static struct drm_crtc tegra_crtc_from_pipe(struct drm_device drm, int pipe)
	512	{
	513	struct drm_crtc *crtc;
	514
	515	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
	516	struct tegra_dc *dc = to_tegra_dc(crtc);
	517
	518	if (dc->pipe == pipe)
	519	return crtc;
	520	}
	521
	522	return NULL;
	523	}
	524
	525	static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
	526	{
	527	/* TODO: implement real hardware counter using syncpoints */
	528	return drm_vblank_count(dev, crtc);
	529	}
	530
	531	static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
	532	{
	533	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	534	struct tegra_dc *dc = to_tegra_dc(crtc);
	535
	536	if (!crtc)
	537	return -ENODEV;
	538
	539	tegra_dc_enable_vblank(dc);
	540
	541	return 0;
	542	}
	543
	544	static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
	545	{
	546	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	547	struct tegra_dc *dc = to_tegra_dc(crtc);
	548
	549	if (crtc)
	550	tegra_dc_disable_vblank(dc);
	551	}
	552
3c03c46a TR	553	static void tegra_drm_preclose(struct drm_device drm, struct drm_file file)
3c03c46a TR	554	{
d43f81cb TB	555	struct host1x_drm_file *fpriv = file->driver_priv;
d43f81cb TB	556	struct host1x_drm_context context, tmp;
3c03c46a TR	557	struct drm_crtc *crtc;
	558
	559	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
	560	tegra_dc_cancel_page_flip(crtc, file);
d43f81cb TB	561
	562	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
	563	host1x_drm_context_free(context);
	564
	565	kfree(fpriv);
3c03c46a TR	566	}
3c03c46a TR	567
e450fcc6 TR	568	#ifdef CONFIG_DEBUG_FS
	569	static int tegra_debugfs_framebuffers(struct seq_file s, void data)
	570	{
	571	struct drm_info_node node = (struct drm_info_node )s->private;
	572	struct drm_device *drm = node->minor->dev;
	573	struct drm_framebuffer *fb;
	574
	575	mutex_lock(&drm->mode_config.fb_lock);
	576
	577	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
	578	seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
	579	fb->base.id, fb->width, fb->height, fb->depth,
	580	fb->bits_per_pixel,
	581	atomic_read(&fb->refcount.refcount));
	582	}
	583
	584	mutex_unlock(&drm->mode_config.fb_lock);
	585
	586	return 0;
	587	}
	588
	589	static struct drm_info_list tegra_debugfs_list[] = {
	590	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
	591	};
	592
	593	static int tegra_debugfs_init(struct drm_minor *minor)
	594	{
	595	return drm_debugfs_create_files(tegra_debugfs_list,
	596	ARRAY_SIZE(tegra_debugfs_list),
	597	minor->debugfs_root, minor);
	598	}
	599
	600	static void tegra_debugfs_cleanup(struct drm_minor *minor)
	601	{
	602	drm_debugfs_remove_files(tegra_debugfs_list,
	603	ARRAY_SIZE(tegra_debugfs_list), minor);
	604	}
	605	#endif
	606
d8f4a9ed TR	607	struct drm_driver tegra_drm_driver = {
	608	.driver_features = DRIVER_BUS_PLATFORM \| DRIVER_MODESET \| DRIVER_GEM,
	609	.load = tegra_drm_load,
	610	.unload = tegra_drm_unload,
	611	.open = tegra_drm_open,
3c03c46a	612	.preclose = tegra_drm_preclose,
d8f4a9ed TR	613	.lastclose = tegra_drm_lastclose,
d8f4a9ed TR	614
6e5ff998 TR	615	.get_vblank_counter = tegra_drm_get_vblank_counter,
	616	.enable_vblank = tegra_drm_enable_vblank,
	617	.disable_vblank = tegra_drm_disable_vblank,
	618
e450fcc6 TR	619	#if defined(CONFIG_DEBUG_FS)
	620	.debugfs_init = tegra_debugfs_init,
	621	.debugfs_cleanup = tegra_debugfs_cleanup,
	622	#endif
	623
de2ba664 AM	624	.gem_free_object = tegra_bo_free_object,
	625	.gem_vm_ops = &tegra_bo_vm_ops,
	626	.dumb_create = tegra_bo_dumb_create,
	627	.dumb_map_offset = tegra_bo_dumb_map_offset,
	628	.dumb_destroy = tegra_bo_dumb_destroy,
d8f4a9ed TR	629
	630	.ioctls = tegra_drm_ioctls,
	631	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
	632	.fops = &tegra_drm_fops,
	633
	634	.name = DRIVER_NAME,
	635	.desc = DRIVER_DESC,
	636	.date = DRIVER_DATE,
	637	.major = DRIVER_MAJOR,
	638	.minor = DRIVER_MINOR,
	639	.patchlevel = DRIVER_PATCHLEVEL,
	640	};