1 files changed, 545 insertions, 0 deletions

diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c
new file mode 100644
index 000000000000..c2db409bbd63
--- /dev/null
+++ b/drivers/gpu/drm/tegra/drm.c
@@ -0,0 +1,545 @@
+/*
+ * 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/host1x.h>
+
+#include "drm.h"
+#include "gem.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;
+};
+
+static int tegra_drm_load(struct drm_device *drm, unsigned long flags)
+{
+        struct host1x_device *device = to_host1x_device(drm->dev);
+        struct tegra_drm *tegra;
+        int err;
+
+        tegra = kzalloc(sizeof(*tegra), GFP_KERNEL);
+        if (!tegra)
+                return -ENOMEM;
+
+        dev_set_drvdata(drm->dev, tegra);
+        mutex_init(&tegra->clients_lock);
+        INIT_LIST_HEAD(&tegra->clients);
+        drm->dev_private = tegra;
+        tegra->drm = drm;
+
+        drm_mode_config_init(drm);
+
+        err = host1x_device_init(device);
+        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)
+{
+        struct host1x_device *device = to_host1x_device(drm->dev);
+        int err;
+
+        drm_kms_helper_poll_fini(drm);
+        tegra_drm_fb_exit(drm);
+
+        err = host1x_device_exit(device);
+        if (err < 0)
+                return err;
+
+        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 tegra_drm_context_free(struct tegra_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 struct tegra_drm_context *tegra_drm_get_context(__u64 context)
+{
+        return (struct tegra_drm_context *)(uintptr_t)context;
+}
+
+static bool tegra_drm_file_owns_context(struct tegra_drm_file *file,
+                                        struct tegra_drm_context *context)
+{
+        struct tegra_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 host1x *host = dev_get_drvdata(drm->dev->parent);
+        struct drm_tegra_syncpt_read *args = data;
+        struct host1x_syncpt *sp;
+
+        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 host1x *host1x = dev_get_drvdata(drm->dev->parent);
+        struct drm_tegra_syncpt_incr *args = data;
+        struct host1x_syncpt *sp;
+
+        sp = host1x_syncpt_get(host1x, 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 host1x *host1x = dev_get_drvdata(drm->dev->parent);
+        struct drm_tegra_syncpt_wait *args = data;
+        struct host1x_syncpt *sp;
+
+        sp = host1x_syncpt_get(host1x, 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 tegra_drm_context *context;
+        struct tegra_drm_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->base.class == args->client) {
+                        err = client->ops->open_channel(client, context);
+                        if (err)
+                                break;
+
+                        list_add(&context->list, &fpriv->contexts);
+                        args->context = (uintptr_t)context;
+                        context->client = client;
+                        return 0;
+                }
+
+        kfree(context);
+        return err;
+}
+
+static int tegra_close_channel(struct drm_device *drm, void *data,
+                               struct drm_file *file)
+{
+        struct tegra_drm_file *fpriv = file->driver_priv;
+        struct drm_tegra_close_channel *args = data;
+        struct tegra_drm_context *context;
+
+        context = tegra_drm_get_context(args->context);
+
+        if (!tegra_drm_file_owns_context(fpriv, context))
+                return -EINVAL;
+
+        list_del(&context->list);
+        tegra_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 tegra_drm_context *context;
+        struct host1x_syncpt *syncpt;
+
+        context = tegra_drm_get_context(args->context);
+
+        if (!tegra_drm_file_owns_context(fpriv, context))
+                return -ENODEV;
+
+        if (args->index >= context->client->base.num_syncpts)
+                return -EINVAL;
+
+        syncpt = context->client->base.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 tegra_drm_context *context;
+
+        context = tegra_drm_get_context(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 tegra_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)
+                tegra_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,
+};
+
+int tegra_drm_register_client(struct tegra_drm *tegra,
+                              struct tegra_drm_client *client)
+{
+        mutex_lock(&tegra->clients_lock);
+        list_add_tail(&client->list, &tegra->clients);
+        mutex_unlock(&tegra->clients_lock);
+
+        return 0;
+}
+
+int tegra_drm_unregister_client(struct tegra_drm *tegra,
+                                struct tegra_drm_client *client)
+{
+        mutex_lock(&tegra->clients_lock);
+        list_del_init(&client->list);
+        mutex_unlock(&tegra->clients_lock);
+
+        return 0;
+}
+
+static int host1x_drm_probe(struct host1x_device *device)
+{
+        return drm_host1x_init(&tegra_drm_driver, device);
+}
+
+static int host1x_drm_remove(struct host1x_device *device)
+{
+        drm_host1x_exit(&tegra_drm_driver, device);
+
+        return 0;
+}
+
+static const struct of_device_id host1x_drm_subdevs[] = {
+        { .compatible = "nvidia,tegra20-dc", },
+        { .compatible = "nvidia,tegra20-hdmi", },
+        { .compatible = "nvidia,tegra20-gr2d", },
+        { .compatible = "nvidia,tegra30-dc", },
+        { .compatible = "nvidia,tegra30-hdmi", },
+        { .compatible = "nvidia,tegra30-gr2d", },
+        { /* sentinel */ }
+};
+
+static struct host1x_driver host1x_drm_driver = {
+        .name = "drm",
+        .probe = host1x_drm_probe,
+        .remove = host1x_drm_remove,
+        .subdevs = host1x_drm_subdevs,
+};
+
+static int __init host1x_drm_init(void)
+{
+        int err;
+
+        err = host1x_driver_register(&host1x_drm_driver);
+        if (err < 0)
+                return err;
+
+        err = platform_driver_register(&tegra_dc_driver);
+        if (err < 0)
+                goto unregister_host1x;
+
+        err = platform_driver_register(&tegra_hdmi_driver);
+        if (err < 0)
+                goto unregister_dc;
+
+        err = platform_driver_register(&tegra_gr2d_driver);
+        if (err < 0)
+                goto unregister_hdmi;
+
+        return 0;
+
+unregister_hdmi:
+        platform_driver_unregister(&tegra_hdmi_driver);
+unregister_dc:
+        platform_driver_unregister(&tegra_dc_driver);
+unregister_host1x:
+        host1x_driver_unregister(&host1x_drm_driver);
+        return err;
+}
+module_init(host1x_drm_init);
+
+static void __exit host1x_drm_exit(void)
+{
+        platform_driver_unregister(&tegra_gr2d_driver);
+        platform_driver_unregister(&tegra_hdmi_driver);
+        platform_driver_unregister(&tegra_dc_driver);
+        host1x_driver_unregister(&host1x_drm_driver);
+}
+module_exit(host1x_drm_exit);
+
+MODULE_AUTHOR("Thierry Reding <thierry.reding@avionic-design.de>");
+MODULE_DESCRIPTION("NVIDIA Tegra DRM driver");
+MODULE_LICENSE("GPL v2");