[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);
				mutex_unlock(&host1x->clients_lock);
				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);
				mutex_unlock(&host1x->clients_lock);
				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;

	/*
	 * We don't use the drm_irq_install() helpers provided by the DRM
	 * core, so we need to set this manually in order to allow the
	 * DRM_IOCTL_WAIT_VBLANK to operate correctly.
	 */
	drm->irq_enabled = 1;

	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;

	return host1x_syncpt_incr(sp);
}

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 const 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,
	.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_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 = drm_gem_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);
b6f2056f	151	mutex_unlock(&host1x->clients_lock);
692e6d7b TB	152	return err;
	153	}
	154	}
	155	}
	156
	157	mutex_unlock(&host1x->clients_lock);
	158
	159	return 0;
	160	}
	161
	162	int host1x_drm_exit(struct host1x_drm *host1x)
	163	{
	164	struct platform_device *pdev = to_platform_device(host1x->dev);
	165	struct host1x_client *client;
	166
	167	if (!host1x->drm)
	168	return 0;
	169
	170	mutex_lock(&host1x->clients_lock);
	171
	172	list_for_each_entry_reverse(client, &host1x->clients, list) {
	173	if (client->ops && client->ops->drm_exit) {
	174	int err = client->ops->drm_exit(client);
	175	if (err < 0) {
	176	dev_err(host1x->dev,
	177	"DRM cleanup failed for %s: %d\n",
	178	dev_name(client->dev), err);
b6f2056f	179	mutex_unlock(&host1x->clients_lock);
692e6d7b TB	180	return err;
	181	}
	182	}
	183	}
	184
	185	mutex_unlock(&host1x->clients_lock);
	186
	187	drm_platform_exit(&tegra_drm_driver, pdev);
	188	host1x->drm = NULL;
	189
	190	return 0;
	191	}
	192
	193	int host1x_register_client(struct host1x_drm *host1x,
	194	struct host1x_client *client)
	195	{
	196	struct host1x_drm_client drm, tmp;
	197	int err;
	198
	199	mutex_lock(&host1x->clients_lock);
	200	list_add_tail(&client->list, &host1x->clients);
	201	mutex_unlock(&host1x->clients_lock);
	202
	203	list_for_each_entry_safe(drm, tmp, &host1x->drm_clients, list)
	204	if (drm->np == client->dev->of_node)
	205	host1x_activate_drm_client(host1x, drm, client);
	206
	207	if (list_empty(&host1x->drm_clients)) {
	208	struct platform_device *pdev = to_platform_device(host1x->dev);
	209
	210	err = drm_platform_init(&tegra_drm_driver, pdev);
	211	if (err < 0) {
	212	dev_err(host1x->dev, "drm_platform_init(): %d\n", err);
	213	return err;
	214	}
	215	}
	216
	217	return 0;
	218	}
	219
	220	int host1x_unregister_client(struct host1x_drm *host1x,
	221	struct host1x_client *client)
	222	{
	223	struct host1x_drm_client drm, tmp;
	224	int err;
	225
	226	list_for_each_entry_safe(drm, tmp, &host1x->drm_active, list) {
	227	if (drm->client == client) {
	228	err = host1x_drm_exit(host1x);
	229	if (err < 0) {
	230	dev_err(host1x->dev, "host1x_drm_exit(): %d\n",
	231	err);
	232	return err;
	233	}
	234
	235	host1x_remove_drm_client(host1x, drm);
	236	break;
	237	}
	238	}
	239
	240	mutex_lock(&host1x->clients_lock);
	241	list_del_init(&client->list);
	242	mutex_unlock(&host1x->clients_lock);
	243
244	return 0;
245	}
246
d8f4a9ed TR	247	static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
d8f4a9ed TR	248	{
c89c0ea6	249	struct host1x_drm *host1x;
d8f4a9ed TR	250	int err;
d8f4a9ed TR	251
692e6d7b	252	host1x = host1x_get_drm_data(drm->dev);
d8f4a9ed TR	253	drm->dev_private = host1x;
	254	host1x->drm = drm;
	255
	256	drm_mode_config_init(drm);
	257
	258	err = host1x_drm_init(host1x, drm);
	259	if (err < 0)
	260	return err;
	261
603f0cc9 TR	262	/*
	263	* We don't use the drm_irq_install() helpers provided by the DRM
	264	* core, so we need to set this manually in order to allow the
	265	* DRM_IOCTL_WAIT_VBLANK to operate correctly.
	266	*/
	267	drm->irq_enabled = 1;
	268
6e5ff998 TR	269	err = drm_vblank_init(drm, drm->mode_config.num_crtc);
	270	if (err < 0)
	271	return err;
	272
d8f4a9ed TR	273	err = tegra_drm_fb_init(drm);
	274	if (err < 0)
	275	return err;
	276
	277	drm_kms_helper_poll_init(drm);
	278
	279	return 0;
	280	}
	281
	282	static int tegra_drm_unload(struct drm_device *drm)
	283	{
	284	drm_kms_helper_poll_fini(drm);
	285	tegra_drm_fb_exit(drm);
	286
	287	drm_mode_config_cleanup(drm);
	288
	289	return 0;
	290	}
	291
	292	static int tegra_drm_open(struct drm_device drm, struct drm_file filp)
	293	{
d43f81cb TB	294	struct host1x_drm_file *fpriv;
	295
	296	fpriv = kzalloc(sizeof(*fpriv), GFP_KERNEL);
	297	if (!fpriv)
	298	return -ENOMEM;
	299
	300	INIT_LIST_HEAD(&fpriv->contexts);
	301	filp->driver_priv = fpriv;
	302
d8f4a9ed TR	303	return 0;
	304	}
	305
d43f81cb TB	306	static void host1x_drm_context_free(struct host1x_drm_context *context)
	307	{
	308	context->client->ops->close_channel(context);
	309	kfree(context);
	310	}
	311
d8f4a9ed TR	312	static void tegra_drm_lastclose(struct drm_device *drm)
d8f4a9ed TR	313	{
c89c0ea6	314	struct host1x_drm *host1x = drm->dev_private;
d8f4a9ed	315
de2ba664	316	tegra_fbdev_restore_mode(host1x->fbdev);
d8f4a9ed TR	317	}
d8f4a9ed TR	318
d43f81cb TB	319	#ifdef CONFIG_DRM_TEGRA_STAGING
	320	static bool host1x_drm_file_owns_context(struct host1x_drm_file *file,
	321	struct host1x_drm_context *context)
	322	{
	323	struct host1x_drm_context *ctx;
	324
	325	list_for_each_entry(ctx, &file->contexts, list)
	326	if (ctx == context)
	327	return true;
	328
	329	return false;
	330	}
	331
	332	static int tegra_gem_create(struct drm_device drm, void data,
	333	struct drm_file *file)
	334	{
	335	struct drm_tegra_gem_create *args = data;
	336	struct tegra_bo *bo;
	337
	338	bo = tegra_bo_create_with_handle(file, drm, args->size,
	339	&args->handle);
	340	if (IS_ERR(bo))
	341	return PTR_ERR(bo);
	342
	343	return 0;
	344	}
	345
	346	static int tegra_gem_mmap(struct drm_device drm, void data,
	347	struct drm_file *file)
	348	{
	349	struct drm_tegra_gem_mmap *args = data;
	350	struct drm_gem_object *gem;
	351	struct tegra_bo *bo;
	352
	353	gem = drm_gem_object_lookup(drm, file, args->handle);
	354	if (!gem)
	355	return -EINVAL;
	356
	357	bo = to_tegra_bo(gem);
	358
	359	args->offset = tegra_bo_get_mmap_offset(bo);
	360
	361	drm_gem_object_unreference(gem);
	362
	363	return 0;
	364	}
	365
	366	static int tegra_syncpt_read(struct drm_device drm, void data,
	367	struct drm_file *file)
	368	{
	369	struct drm_tegra_syncpt_read *args = data;
	370	struct host1x *host = dev_get_drvdata(drm->dev);
	371	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
	372
	373	if (!sp)
	374	return -EINVAL;
	375
	376	args->value = host1x_syncpt_read_min(sp);
	377	return 0;
	378	}
	379
	380	static int tegra_syncpt_incr(struct drm_device drm, void data,
	381	struct drm_file *file)
	382	{
383	struct drm_tegra_syncpt_incr *args = data;
384	struct host1x *host = dev_get_drvdata(drm->dev);
385	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
386
387	if (!sp)
388	return -EINVAL;
389
ebae30b1	390	return host1x_syncpt_incr(sp);
d43f81cb TB	391	}
	392
	393	static int tegra_syncpt_wait(struct drm_device drm, void data,
	394	struct drm_file *file)
	395	{
	396	struct drm_tegra_syncpt_wait *args = data;
	397	struct host1x *host = dev_get_drvdata(drm->dev);
	398	struct host1x_syncpt *sp = host1x_syncpt_get(host, args->id);
	399
	400	if (!sp)
	401	return -EINVAL;
	402
	403	return host1x_syncpt_wait(sp, args->thresh, args->timeout,
	404	&args->value);
	405	}
	406
	407	static int tegra_open_channel(struct drm_device drm, void data,
	408	struct drm_file *file)
	409	{
	410	struct drm_tegra_open_channel *args = data;
	411	struct host1x_client *client;
	412	struct host1x_drm_context *context;
	413	struct host1x_drm_file *fpriv = file->driver_priv;
	414	struct host1x_drm *host1x = drm->dev_private;
	415	int err = -ENODEV;
	416
	417	context = kzalloc(sizeof(*context), GFP_KERNEL);
	418	if (!context)
	419	return -ENOMEM;
	420
	421	list_for_each_entry(client, &host1x->clients, list)
	422	if (client->class == args->client) {
	423	err = client->ops->open_channel(client, context);
	424	if (err)
	425	break;
	426
	427	context->client = client;
	428	list_add(&context->list, &fpriv->contexts);
	429	args->context = (uintptr_t)context;
	430	return 0;
	431	}
	432
	433	kfree(context);
	434	return err;
	435	}
	436
	437	static int tegra_close_channel(struct drm_device drm, void data,
	438	struct drm_file *file)
	439	{
	440	struct drm_tegra_close_channel *args = data;
	441	struct host1x_drm_file *fpriv = file->driver_priv;
	442	struct host1x_drm_context *context =
	443	(struct host1x_drm_context *)(uintptr_t)args->context;
	444
	445	if (!host1x_drm_file_owns_context(fpriv, context))
	446	return -EINVAL;
	447
	448	list_del(&context->list);
	449	host1x_drm_context_free(context);
	450
	451	return 0;
	452	}
	453
	454	static int tegra_get_syncpt(struct drm_device drm, void data,
455	struct drm_file *file)
456	{
457	struct drm_tegra_get_syncpt *args = data;
458	struct host1x_drm_file *fpriv = file->driver_priv;
459	struct host1x_drm_context *context =
460	(struct host1x_drm_context *)(uintptr_t)args->context;
461	struct host1x_syncpt *syncpt;
462
463	if (!host1x_drm_file_owns_context(fpriv, context))
464	return -ENODEV;
465
466	if (args->index >= context->client->num_syncpts)
467	return -EINVAL;
468
469	syncpt = context->client->syncpts[args->index];
470	args->id = host1x_syncpt_id(syncpt);
471
472	return 0;
473	}
474
475	static int tegra_submit(struct drm_device drm, void data,
476	struct drm_file *file)
477	{
478	struct drm_tegra_submit *args = data;
479	struct host1x_drm_file *fpriv = file->driver_priv;
480	struct host1x_drm_context *context =
481	(struct host1x_drm_context *)(uintptr_t)args->context;
482
483	if (!host1x_drm_file_owns_context(fpriv, context))
484	return -ENODEV;
485
486	return context->client->ops->submit(context, args, drm, file);
487	}
488	#endif
489
baa70943	490	static const struct drm_ioctl_desc tegra_drm_ioctls[] = {
d43f81cb TB	491	#ifdef CONFIG_DRM_TEGRA_STAGING
	492	DRM_IOCTL_DEF_DRV(TEGRA_GEM_CREATE, tegra_gem_create, DRM_UNLOCKED \| DRM_AUTH),
	493	DRM_IOCTL_DEF_DRV(TEGRA_GEM_MMAP, tegra_gem_mmap, DRM_UNLOCKED),
	494	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_READ, tegra_syncpt_read, DRM_UNLOCKED),
	495	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_INCR, tegra_syncpt_incr, DRM_UNLOCKED),
	496	DRM_IOCTL_DEF_DRV(TEGRA_SYNCPT_WAIT, tegra_syncpt_wait, DRM_UNLOCKED),
	497	DRM_IOCTL_DEF_DRV(TEGRA_OPEN_CHANNEL, tegra_open_channel, DRM_UNLOCKED),
	498	DRM_IOCTL_DEF_DRV(TEGRA_CLOSE_CHANNEL, tegra_close_channel, DRM_UNLOCKED),
	499	DRM_IOCTL_DEF_DRV(TEGRA_GET_SYNCPT, tegra_get_syncpt, DRM_UNLOCKED),
	500	DRM_IOCTL_DEF_DRV(TEGRA_SUBMIT, tegra_submit, DRM_UNLOCKED),
	501	#endif
d8f4a9ed TR	502	};
	503
	504	static const struct file_operations tegra_drm_fops = {
	505	.owner = THIS_MODULE,
	506	.open = drm_open,
	507	.release = drm_release,
	508	.unlocked_ioctl = drm_ioctl,
de2ba664	509	.mmap = tegra_drm_mmap,
d8f4a9ed	510	.poll = drm_poll,
d8f4a9ed TR	511	.read = drm_read,
	512	#ifdef CONFIG_COMPAT
	513	.compat_ioctl = drm_compat_ioctl,
	514	#endif
	515	.llseek = noop_llseek,
	516	};
	517
6e5ff998 TR	518	static struct drm_crtc tegra_crtc_from_pipe(struct drm_device drm, int pipe)
	519	{
	520	struct drm_crtc *crtc;
	521
	522	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) {
	523	struct tegra_dc *dc = to_tegra_dc(crtc);
	524
	525	if (dc->pipe == pipe)
	526	return crtc;
	527	}
	528
	529	return NULL;
	530	}
	531
	532	static u32 tegra_drm_get_vblank_counter(struct drm_device *dev, int crtc)
	533	{
	534	/* TODO: implement real hardware counter using syncpoints */
	535	return drm_vblank_count(dev, crtc);
	536	}
	537
	538	static int tegra_drm_enable_vblank(struct drm_device *drm, int pipe)
	539	{
	540	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	541	struct tegra_dc *dc = to_tegra_dc(crtc);
	542
	543	if (!crtc)
	544	return -ENODEV;
	545
	546	tegra_dc_enable_vblank(dc);
	547
	548	return 0;
	549	}
	550
	551	static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe)
	552	{
	553	struct drm_crtc *crtc = tegra_crtc_from_pipe(drm, pipe);
	554	struct tegra_dc *dc = to_tegra_dc(crtc);
	555
	556	if (crtc)
	557	tegra_dc_disable_vblank(dc);
	558	}
	559
3c03c46a TR	560	static void tegra_drm_preclose(struct drm_device drm, struct drm_file file)
3c03c46a TR	561	{
d43f81cb TB	562	struct host1x_drm_file *fpriv = file->driver_priv;
d43f81cb TB	563	struct host1x_drm_context context, tmp;
3c03c46a TR	564	struct drm_crtc *crtc;
	565
	566	list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
	567	tegra_dc_cancel_page_flip(crtc, file);
d43f81cb TB	568
	569	list_for_each_entry_safe(context, tmp, &fpriv->contexts, list)
	570	host1x_drm_context_free(context);
	571
	572	kfree(fpriv);
3c03c46a TR	573	}
3c03c46a TR	574
e450fcc6 TR	575	#ifdef CONFIG_DEBUG_FS
	576	static int tegra_debugfs_framebuffers(struct seq_file s, void data)
	577	{
	578	struct drm_info_node node = (struct drm_info_node )s->private;
	579	struct drm_device *drm = node->minor->dev;
	580	struct drm_framebuffer *fb;
	581
	582	mutex_lock(&drm->mode_config.fb_lock);
	583
	584	list_for_each_entry(fb, &drm->mode_config.fb_list, head) {
	585	seq_printf(s, "%3d: user size: %d x %d, depth %d, %d bpp, refcount %d\n",
	586	fb->base.id, fb->width, fb->height, fb->depth,
	587	fb->bits_per_pixel,
	588	atomic_read(&fb->refcount.refcount));
	589	}
	590
	591	mutex_unlock(&drm->mode_config.fb_lock);
	592
	593	return 0;
	594	}
	595
	596	static struct drm_info_list tegra_debugfs_list[] = {
	597	{ "framebuffers", tegra_debugfs_framebuffers, 0 },
	598	};
	599
	600	static int tegra_debugfs_init(struct drm_minor *minor)
	601	{
	602	return drm_debugfs_create_files(tegra_debugfs_list,
	603	ARRAY_SIZE(tegra_debugfs_list),
	604	minor->debugfs_root, minor);
	605	}
	606
	607	static void tegra_debugfs_cleanup(struct drm_minor *minor)
	608	{
	609	drm_debugfs_remove_files(tegra_debugfs_list,
	610	ARRAY_SIZE(tegra_debugfs_list), minor);
	611	}
	612	#endif
	613
d8f4a9ed	614	struct drm_driver tegra_drm_driver = {
604faa7d	615	.driver_features = DRIVER_MODESET \| DRIVER_GEM,
d8f4a9ed TR	616	.load = tegra_drm_load,
	617	.unload = tegra_drm_unload,
	618	.open = tegra_drm_open,
3c03c46a	619	.preclose = tegra_drm_preclose,
d8f4a9ed TR	620	.lastclose = tegra_drm_lastclose,
d8f4a9ed TR	621
6e5ff998 TR	622	.get_vblank_counter = tegra_drm_get_vblank_counter,
	623	.enable_vblank = tegra_drm_enable_vblank,
	624	.disable_vblank = tegra_drm_disable_vblank,
	625
e450fcc6 TR	626	#if defined(CONFIG_DEBUG_FS)
	627	.debugfs_init = tegra_debugfs_init,
	628	.debugfs_cleanup = tegra_debugfs_cleanup,
	629	#endif
	630
de2ba664 AM	631	.gem_free_object = tegra_bo_free_object,
	632	.gem_vm_ops = &tegra_bo_vm_ops,
	633	.dumb_create = tegra_bo_dumb_create,
	634	.dumb_map_offset = tegra_bo_dumb_map_offset,
43387b37	635	.dumb_destroy = drm_gem_dumb_destroy,
d8f4a9ed TR	636
	637	.ioctls = tegra_drm_ioctls,
	638	.num_ioctls = ARRAY_SIZE(tegra_drm_ioctls),
	639	.fops = &tegra_drm_fops,
	640
	641	.name = DRIVER_NAME,
	642	.desc = DRIVER_DESC,
	643	.date = DRIVER_DATE,
	644	.major = DRIVER_MAJOR,
	645	.minor = DRIVER_MINOR,
	646	.patchlevel = DRIVER_PATCHLEVEL,
	647	};