linux/drivers/gpu/host1x/drm/drm.c

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/*
* 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 tegra_drm_file {
struct list_head contexts;
};
struct host1x_subdev {
struct host1x_client *client;
struct device_node *np;
struct list_head list;
};
static int host1x_subdev_add(struct tegra_drm *tegra, struct device_node *np)
{
struct host1x_subdev *subdev;
subdev = kzalloc(sizeof(*subdev), GFP_KERNEL);
if (!subdev)
return -ENOMEM;
INIT_LIST_HEAD(&subdev->list);
subdev->np = of_node_get(np);
list_add_tail(&subdev->list, &tegra->subdevs);
return 0;
}
static int host1x_subdev_register(struct tegra_drm *tegra,
struct host1x_subdev *subdev,
struct host1x_client *client)
{
mutex_lock(&tegra->subdevs_lock);
list_del_init(&subdev->list);
list_add_tail(&subdev->list, &tegra->active);
subdev->client = client;
mutex_unlock(&tegra->subdevs_lock);
return 0;
}
static int host1x_subdev_unregister(struct tegra_drm *tegra,
struct host1x_subdev *subdev)
{
mutex_lock(&tegra->subdevs_lock);
list_del_init(&subdev->list);
mutex_unlock(&tegra->subdevs_lock);
of_node_put(subdev->np);
kfree(subdev);
return 0;
}
static int tegra_parse_dt(struct tegra_drm *tegra)
{
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(tegra->dev->of_node, np) {
if (of_device_is_compatible(np, compat[i]) &&
of_device_is_available(np)) {
err = host1x_subdev_add(tegra, np);
if (err < 0)
return err;
}
}
}
return 0;
}
int tegra_drm_alloc(struct platform_device *pdev)
{
struct tegra_drm *tegra;
int err;
tegra = devm_kzalloc(&pdev->dev, sizeof(*tegra), GFP_KERNEL);
if (!tegra)
return -ENOMEM;
mutex_init(&tegra->subdevs_lock);
INIT_LIST_HEAD(&tegra->subdevs);
INIT_LIST_HEAD(&tegra->active);
mutex_init(&tegra->clients_lock);
INIT_LIST_HEAD(&tegra->clients);
tegra->dev = &pdev->dev;
err = tegra_parse_dt(tegra);
if (err < 0) {
dev_err(&pdev->dev, "failed to parse DT: %d\n", err);
return err;
}
host1x_set_drm_data(&pdev->dev, tegra);
return 0;
}
int tegra_drm_init(struct tegra_drm *tegra, struct drm_device *drm)
{
struct host1x_client *client;
mutex_lock(&tegra->clients_lock);
list_for_each_entry(client, &tegra->clients, list) {
if (client->ops && client->ops->drm_init) {
int err = client->ops->drm_init(client, drm);
if (err < 0) {
dev_err(tegra->dev,
"DRM setup failed for %s: %d\n",
dev_name(client->dev), err);
mutex_unlock(&tegra->clients_lock);
return err;
}
}
}
mutex_unlock(&tegra->clients_lock);
return 0;
}
int tegra_drm_exit(struct tegra_drm *tegra)
{
struct platform_device *pdev = to_platform_device(tegra->dev);
struct host1x_client *client;
if (!tegra->drm)
return 0;
mutex_lock(&tegra->clients_lock);
list_for_each_entry_reverse(client, &tegra->clients, list) {
if (client->ops && client->ops->drm_exit) {
int err = client->ops->drm_exit(client);
if (err < 0) {
dev_err(tegra->dev,
"DRM cleanup failed for %s: %d\n",
dev_name(client->dev), err);
mutex_unlock(&tegra->clients_lock);
return err;
}
}
}
mutex_unlock(&tegra->clients_lock);
drm_platform_exit(&tegra_drm_driver, pdev);
tegra->drm = NULL;
return 0;
}
int host1x_register_client(struct tegra_drm *tegra,
struct host1x_client *client)
{
struct host1x_subdev *subdev, *tmp;
int err;
mutex_lock(&tegra->clients_lock);
list_add_tail(&client->list, &tegra->clients);
mutex_unlock(&tegra->clients_lock);
list_for_each_entry_safe(subdev, tmp, &tegra->subdevs, list)
if (subdev->np == client->dev->of_node)
host1x_subdev_register(tegra, subdev, client);
if (list_empty(&tegra->subdevs)) {
struct platform_device *pdev = to_platform_device(tegra->dev);
err = drm_platform_init(&tegra_drm_driver, pdev);
if (err < 0) {
dev_err(tegra->dev, "drm_platform_init(): %d\n", err);
return err;
}
}
return 0;
}
int host1x_unregister_client(struct tegra_drm *tegra,
struct host1x_client *client)
{
struct host1x_subdev *subdev, *tmp;
int err;
list_for_each_entry_safe(subdev, tmp, &tegra->active, list) {
if (subdev->client == client) {
err = tegra_drm_exit(tegra);
if (err < 0) {
dev_err(tegra->dev, "tegra_drm_exit(): %d\n",
err);
return err;
}
host1x_subdev_unregister(tegra, subdev);
break;
}
}
mutex_lock(&tegra->clients_lock);
list_del_init(&client->list);
mutex_unlock(&tegra->clients_lock);
return 0;
}
static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
{
struct tegra_drm *tegra;
int err;
tegra = host1x_get_drm_data(drm->dev);
drm->dev_private = tegra;
tegra->drm = drm;
drm_mode_config_init(drm);
err = tegra_drm_init(tegra, 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 = true;
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 tegra_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 tegra_drm *tegra = drm->dev_private;
tegra_fbdev_restore_mode(tegra->fbdev);
}
#ifdef CONFIG_DRM_TEGRA_STAGING
static bool tegra_drm_file_owns_context(struct tegra_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 = drm_vma_node_offset_addr(&bo->gem.vma_node);
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 tegra_drm_file *fpriv = file->driver_priv;
struct tegra_drm *tegra = drm->dev_private;
struct drm_tegra_open_channel *args = data;
struct host1x_drm_context *context;
struct host1x_client *client;
int err = -ENODEV;
context = kzalloc(sizeof(*context), GFP_KERNEL);
if (!context)
return -ENOMEM;
list_for_each_entry(client, &tegra->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 tegra_drm_file *fpriv = file->driver_priv;
struct host1x_drm_context *context =
(struct host1x_drm_context *)(uintptr_t)args->context;
if (!tegra_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 tegra_drm_file *fpriv = file->driver_priv;
struct drm_tegra_get_syncpt *args = data;
struct host1x_drm_context *context =
(struct host1x_drm_context *)(uintptr_t)args->context;
struct host1x_syncpt *syncpt;
if (!tegra_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 tegra_drm_file *fpriv = file->driver_priv;
struct drm_tegra_submit *args = data;
struct host1x_drm_context *context =
(struct host1x_drm_context *)(uintptr_t)args->context;
if (!tegra_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 tegra_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,
};