diff options
Diffstat (limited to 'drivers/gpu/host1x/drm/drm.c')
| -rw-r--r-- | drivers/gpu/host1x/drm/drm.c | 640 |
1 files changed, 640 insertions, 0 deletions
diff --git a/drivers/gpu/host1x/drm/drm.c b/drivers/gpu/host1x/drm/drm.c new file mode 100644 index 000000000000..2b561c9118c6 --- /dev/null +++ b/drivers/gpu/host1x/drm/drm.c @@ -0,0 +1,640 @@ +/* + * 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, +}; 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