Release 4.7 drivers/gpu/drm/etnaviv/etnaviv_drv.c

Directory: drivers/gpu/drm/etnaviv
/*
 * Copyright (C) 2015 Etnaviv Project
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <linux/component.h>
#include <linux/of_platform.h>

#include "etnaviv_drv.h"
#include "etnaviv_gpu.h"
#include "etnaviv_gem.h"
#include "etnaviv_mmu.h"
#include "etnaviv_gem.h"

#ifdef CONFIG_DRM_ETNAVIV_REGISTER_LOGGING

static bool reglog;
MODULE_PARM_DESC(reglog, "Enable register read/write logging");
module_param(reglog, bool, 0600);
#else

#define reglog 0
#endif



void __iomem *etnaviv_ioremap(struct platform_device *pdev, const char *name,
		const char *dbgname)
{
	struct resource *res;
	void __iomem *ptr;

	if (name)
		res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name);
	else
		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);

	ptr = devm_ioremap_resource(&pdev->dev, res);
	if (IS_ERR(ptr)) {
		dev_err(&pdev->dev, "failed to ioremap %s: %ld\n", name,
			PTR_ERR(ptr));
		return ptr;
	}

	if (reglog)
		dev_printk(KERN_DEBUG, &pdev->dev, "IO:region %s 0x%p %08zx\n",
			   dbgname, ptr, (size_t)resource_size(res));

	return ptr;
}

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void etnaviv_writel(u32 data, void __iomem *addr)
{
	if (reglog)
		printk(KERN_DEBUG "IO:W %p %08x\n", addr, data);

	writel(data, addr);
}

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u32 etnaviv_readl(const void __iomem *addr)
{
	u32 val = readl(addr);

	if (reglog)
		printk(KERN_DEBUG "IO:R %p %08x\n", addr, val);

	return val;
}

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/*
 * DRM operations:
 */




static void load_gpu(struct drm_device *dev)
{
	struct etnaviv_drm_private *priv = dev->dev_private;
	unsigned int i;

	for (i = 0; i < ETNA_MAX_PIPES; i++) {
		struct etnaviv_gpu *g = priv->gpu[i];

		if (g) {
			int ret;

			ret = etnaviv_gpu_init(g);
			if (ret) {
				dev_err(g->dev, "hw init failed: %d\n", ret);
				priv->gpu[i] = NULL;
			}
		}
	}
}

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static int etnaviv_open(struct drm_device *dev, struct drm_file *file)
{
	struct etnaviv_file_private *ctx;

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

	file->driver_priv = ctx;

	return 0;
}

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static void etnaviv_preclose(struct drm_device *dev, struct drm_file *file)
{
	struct etnaviv_drm_private *priv = dev->dev_private;
	struct etnaviv_file_private *ctx = file->driver_priv;
	unsigned int i;

	for (i = 0; i < ETNA_MAX_PIPES; i++) {
		struct etnaviv_gpu *gpu = priv->gpu[i];

		if (gpu) {
			mutex_lock(&gpu->lock);
			if (gpu->lastctx == ctx)
				gpu->lastctx = NULL;
			mutex_unlock(&gpu->lock);
		}
	}

	kfree(ctx);
}

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/*
 * DRM debugfs:
 */

#ifdef CONFIG_DEBUG_FS


static int etnaviv_gem_show(struct drm_device *dev, struct seq_file *m)
{
	struct etnaviv_drm_private *priv = dev->dev_private;

	etnaviv_gem_describe_objects(priv, m);

	return 0;
}

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static int etnaviv_mm_show(struct drm_device *dev, struct seq_file *m)
{
	int ret;

	read_lock(&dev->vma_offset_manager->vm_lock);
	ret = drm_mm_dump_table(m, &dev->vma_offset_manager->vm_addr_space_mm);
	read_unlock(&dev->vma_offset_manager->vm_lock);

	return ret;
}

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static int etnaviv_mmu_show(struct etnaviv_gpu *gpu, struct seq_file *m)
{
	seq_printf(m, "Active Objects (%s):\n", dev_name(gpu->dev));

	mutex_lock(&gpu->mmu->lock);
	drm_mm_dump_table(m, &gpu->mmu->mm);
	mutex_unlock(&gpu->mmu->lock);

	return 0;
}

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static void etnaviv_buffer_dump(struct etnaviv_gpu *gpu, struct seq_file *m)
{
	struct etnaviv_cmdbuf *buf = gpu->buffer;
	u32 size = buf->size;
	u32 *ptr = buf->vaddr;
	u32 i;

	seq_printf(m, "virt %p - phys 0x%llx - free 0x%08x\n",
			buf->vaddr, (u64)buf->paddr, size - buf->user_size);

	for (i = 0; i < size / 4; i++) {
		if (i && !(i % 4))
			seq_puts(m, "\n");
		if (i % 4 == 0)
			seq_printf(m, "\t0x%p: ", ptr + i);
		seq_printf(m, "%08x ", *(ptr + i));
	}
	seq_puts(m, "\n");
}

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static int etnaviv_ring_show(struct etnaviv_gpu *gpu, struct seq_file *m)
{
	seq_printf(m, "Ring Buffer (%s): ", dev_name(gpu->dev));

	mutex_lock(&gpu->lock);
	etnaviv_buffer_dump(gpu, m);
	mutex_unlock(&gpu->lock);

	return 0;
}

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static int show_unlocked(struct seq_file *m, void *arg)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	int (*show)(struct drm_device *dev, struct seq_file *m) =
			node->info_ent->data;

	return show(dev, m);
}

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static int show_each_gpu(struct seq_file *m, void *arg)
{
	struct drm_info_node *node = (struct drm_info_node *) m->private;
	struct drm_device *dev = node->minor->dev;
	struct etnaviv_drm_private *priv = dev->dev_private;
	struct etnaviv_gpu *gpu;
	int (*show)(struct etnaviv_gpu *gpu, struct seq_file *m) =
			node->info_ent->data;
	unsigned int i;
	int ret = 0;

	for (i = 0; i < ETNA_MAX_PIPES; i++) {
		gpu = priv->gpu[i];
		if (!gpu)
			continue;

		ret = show(gpu, m);
		if (ret < 0)
			break;
	}

	return ret;
}

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static struct drm_info_list etnaviv_debugfs_list[] = {
		{"gpu", show_each_gpu, 0, etnaviv_gpu_debugfs},
		{"gem", show_unlocked, 0, etnaviv_gem_show},
		{ "mm", show_unlocked, 0, etnaviv_mm_show },
		{"mmu", show_each_gpu, 0, etnaviv_mmu_show},
		{"ring", show_each_gpu, 0, etnaviv_ring_show},
};



static int etnaviv_debugfs_init(struct drm_minor *minor)
{
	struct drm_device *dev = minor->dev;
	int ret;

	ret = drm_debugfs_create_files(etnaviv_debugfs_list,
			ARRAY_SIZE(etnaviv_debugfs_list),
			minor->debugfs_root, minor);

	if (ret) {
		dev_err(dev->dev, "could not install etnaviv_debugfs_list\n");
		return ret;
	}

	return ret;
}

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

/*
 * DRM ioctls:
 */



static int etnaviv_ioctl_get_param(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct etnaviv_drm_private *priv = dev->dev_private;
	struct drm_etnaviv_param *args = data;
	struct etnaviv_gpu *gpu;

	if (args->pipe >= ETNA_MAX_PIPES)
		return -EINVAL;

	gpu = priv->gpu[args->pipe];
	if (!gpu)
		return -ENXIO;

	return etnaviv_gpu_get_param(gpu, args->param, &args->value);
}

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static int etnaviv_ioctl_gem_new(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct drm_etnaviv_gem_new *args = data;

	if (args->flags & ~(ETNA_BO_CACHED | ETNA_BO_WC | ETNA_BO_UNCACHED |
			    ETNA_BO_FORCE_MMU))
		return -EINVAL;

	return etnaviv_gem_new_handle(dev, file, args->size,
			args->flags, &args->handle);
}

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#define TS(t) ((struct timespec){ \
        .tv_sec = (t).tv_sec, \
        .tv_nsec = (t).tv_nsec \
})



static int etnaviv_ioctl_gem_cpu_prep(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct drm_etnaviv_gem_cpu_prep *args = data;
	struct drm_gem_object *obj;
	int ret;

	if (args->op & ~(ETNA_PREP_READ | ETNA_PREP_WRITE | ETNA_PREP_NOSYNC))
		return -EINVAL;

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -ENOENT;

	ret = etnaviv_gem_cpu_prep(obj, args->op, &TS(args->timeout));

	drm_gem_object_unreference_unlocked(obj);

	return ret;
}

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static int etnaviv_ioctl_gem_cpu_fini(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct drm_etnaviv_gem_cpu_fini *args = data;
	struct drm_gem_object *obj;
	int ret;

	if (args->flags)
		return -EINVAL;

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -ENOENT;

	ret = etnaviv_gem_cpu_fini(obj);

	drm_gem_object_unreference_unlocked(obj);

	return ret;
}

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static int etnaviv_ioctl_gem_info(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct drm_etnaviv_gem_info *args = data;
	struct drm_gem_object *obj;
	int ret;

	if (args->pad)
		return -EINVAL;

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -ENOENT;

	ret = etnaviv_gem_mmap_offset(obj, &args->offset);
	drm_gem_object_unreference_unlocked(obj);

	return ret;
}

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static int etnaviv_ioctl_wait_fence(struct drm_device *dev, void *data,
		struct drm_file *file)
{
	struct drm_etnaviv_wait_fence *args = data;
	struct etnaviv_drm_private *priv = dev->dev_private;
	struct timespec *timeout = &TS(args->timeout);
	struct etnaviv_gpu *gpu;

	if (args->flags & ~(ETNA_WAIT_NONBLOCK))
		return -EINVAL;

	if (args->pipe >= ETNA_MAX_PIPES)
		return -EINVAL;

	gpu = priv->gpu[args->pipe];
	if (!gpu)
		return -ENXIO;

	if (args->flags & ETNA_WAIT_NONBLOCK)
		timeout = NULL;

	return etnaviv_gpu_wait_fence_interruptible(gpu, args->fence,
						    timeout);
}

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static int etnaviv_ioctl_gem_userptr(struct drm_device *dev, void *data,
	struct drm_file *file)
{
	struct drm_etnaviv_gem_userptr *args = data;
	int access;

	if (args->flags & ~(ETNA_USERPTR_READ|ETNA_USERPTR_WRITE) ||
	    args->flags == 0)
		return -EINVAL;

	if (offset_in_page(args->user_ptr | args->user_size) ||
	    (uintptr_t)args->user_ptr != args->user_ptr ||
	    (u32)args->user_size != args->user_size ||
	    args->user_ptr & ~PAGE_MASK)
		return -EINVAL;

	if (args->flags & ETNA_USERPTR_WRITE)
		access = VERIFY_WRITE;
	else
		access = VERIFY_READ;

	if (!access_ok(access, (void __user *)(unsigned long)args->user_ptr,
		       args->user_size))
		return -EFAULT;

	return etnaviv_gem_new_userptr(dev, file, args->user_ptr,
				       args->user_size, args->flags,
				       &args->handle);
}

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static int etnaviv_ioctl_gem_wait(struct drm_device *dev, void *data,
	struct drm_file *file)
{
	struct etnaviv_drm_private *priv = dev->dev_private;
	struct drm_etnaviv_gem_wait *args = data;
	struct timespec *timeout = &TS(args->timeout);
	struct drm_gem_object *obj;
	struct etnaviv_gpu *gpu;
	int ret;

	if (args->flags & ~(ETNA_WAIT_NONBLOCK))
		return -EINVAL;

	if (args->pipe >= ETNA_MAX_PIPES)
		return -EINVAL;

	gpu = priv->gpu[args->pipe];
	if (!gpu)
		return -ENXIO;

	obj = drm_gem_object_lookup(file, args->handle);
	if (!obj)
		return -ENOENT;

	if (args->flags & ETNA_WAIT_NONBLOCK)
		timeout = NULL;

	ret = etnaviv_gem_wait_bo(gpu, obj, timeout);

	drm_gem_object_unreference_unlocked(obj);

	return ret;
}

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static const struct drm_ioctl_desc etnaviv_ioctls[] = {

#define ETNA_IOCTL(n, func, flags) \
	DRM_IOCTL_DEF_DRV(ETNAVIV_##n, etnaviv_ioctl_##func, flags)
	ETNA_IOCTL(GET_PARAM,    get_param,    DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_NEW,      gem_new,      DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_INFO,     gem_info,     DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_CPU_PREP, gem_cpu_prep, DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_CPU_FINI, gem_cpu_fini, DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_SUBMIT,   gem_submit,   DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(WAIT_FENCE,   wait_fence,   DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_USERPTR,  gem_userptr,  DRM_AUTH|DRM_RENDER_ALLOW),
	ETNA_IOCTL(GEM_WAIT,     gem_wait,     DRM_AUTH|DRM_RENDER_ALLOW),
};


static const struct vm_operations_struct vm_ops = {
	.fault = etnaviv_gem_fault,
	.open = drm_gem_vm_open,
	.close = drm_gem_vm_close,
};


static const struct file_operations fops = {
	.owner              = THIS_MODULE,
	.open               = drm_open,
	.release            = drm_release,
	.unlocked_ioctl     = drm_ioctl,
#ifdef CONFIG_COMPAT
	.compat_ioctl       = drm_compat_ioctl,
#endif
	.poll               = drm_poll,
	.read               = drm_read,
	.llseek             = no_llseek,
	.mmap               = etnaviv_gem_mmap,
};


static struct drm_driver etnaviv_drm_driver = {
	.driver_features    = DRIVER_HAVE_IRQ |
				DRIVER_GEM |
				DRIVER_PRIME |
				DRIVER_RENDER,
	.open               = etnaviv_open,
	.preclose           = etnaviv_preclose,
	.set_busid          = drm_platform_set_busid,
	.gem_free_object_unlocked = etnaviv_gem_free_object,
	.gem_vm_ops         = &vm_ops,
	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	.gem_prime_export   = drm_gem_prime_export,
	.gem_prime_import   = drm_gem_prime_import,
	.gem_prime_pin      = etnaviv_gem_prime_pin,
	.gem_prime_unpin    = etnaviv_gem_prime_unpin,
	.gem_prime_get_sg_table = etnaviv_gem_prime_get_sg_table,
	.gem_prime_import_sg_table = etnaviv_gem_prime_import_sg_table,
	.gem_prime_vmap     = etnaviv_gem_prime_vmap,
	.gem_prime_vunmap   = etnaviv_gem_prime_vunmap,
#ifdef CONFIG_DEBUG_FS
	.debugfs_init       = etnaviv_debugfs_init,
	.debugfs_cleanup    = etnaviv_debugfs_cleanup,
#endif
	.ioctls             = etnaviv_ioctls,
	.num_ioctls         = DRM_ETNAVIV_NUM_IOCTLS,
	.fops               = &fops,
	.name               = "etnaviv",
	.desc               = "etnaviv DRM",
	.date               = "20151214",
	.major              = 1,
	.minor              = 0,
};

/*
 * Platform driver:
 */


static int etnaviv_bind(struct device *dev)
{
	struct etnaviv_drm_private *priv;
	struct drm_device *drm;
	int ret;

	drm = drm_dev_alloc(&etnaviv_drm_driver, dev);
	if (!drm)
		return -ENOMEM;

	drm->platformdev = to_platform_device(dev);

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		dev_err(dev, "failed to allocate private data\n");
		ret = -ENOMEM;
		goto out_unref;
	}
	drm->dev_private = priv;

	priv->wq = alloc_ordered_workqueue("etnaviv", 0);
	if (!priv->wq) {
		ret = -ENOMEM;
		goto out_wq;
	}

	mutex_init(&priv->gem_lock);
	INIT_LIST_HEAD(&priv->gem_list);
	priv->num_gpus = 0;

	dev_set_drvdata(dev, drm);

	ret = component_bind_all(dev, drm);
	if (ret < 0)
		goto out_bind;

	load_gpu(drm);

	ret = drm_dev_register(drm, 0);
	if (ret)
		goto out_register;

	return 0;

out_register:
	component_unbind_all(dev, drm);
out_bind:
	flush_workqueue(priv->wq);
	destroy_workqueue(priv->wq);
out_wq:
	kfree(priv);
out_unref:
	drm_dev_unref(drm);

	return ret;
}

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static void etnaviv_unbind(struct device *dev)
{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct etnaviv_drm_private *priv = drm->dev_private;

	drm_dev_unregister(drm);

	flush_workqueue(priv->wq);
	destroy_workqueue(priv->wq);

	component_unbind_all(dev, drm);

	drm->dev_private = NULL;
	kfree(priv);

	drm_put_dev(drm);
}

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static const struct component_master_ops etnaviv_master_ops = {
	.bind = etnaviv_bind,
	.unbind = etnaviv_unbind,
};



static int compare_of(struct device *dev, void *data)
{
	struct device_node *np = data;

	return dev->of_node == np;
}

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static int compare_str(struct device *dev, void *data)
{
	return !strcmp(dev_name(dev), data);
}

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static int etnaviv_pdev_probe(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct device_node *node = dev->of_node;
	struct component_match *match = NULL;

	dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));

	if (node) {
		struct device_node *core_node;
		int i;

		for (i = 0; ; i++) {
			core_node = of_parse_phandle(node, "cores", i);
			if (!core_node)
				break;

			component_match_add(&pdev->dev, &match, compare_of,
					    core_node);
			of_node_put(core_node);
		}
	} else if (dev->platform_data) {
		char **names = dev->platform_data;
		unsigned i;

		for (i = 0; names[i]; i++)
			component_match_add(dev, &match, compare_str, names[i]);
	}

	return component_master_add_with_match(dev, &etnaviv_master_ops, match);
}

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static int etnaviv_pdev_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &etnaviv_master_ops);

	return 0;
}

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the etnaviv authors the etnaviv authors 25 100.00% 1 100.00%
Total 25 100.00% 1 100.00%


static const struct of_device_id dt_match[] = {
	{ .compatible = "fsl,imx-gpu-subsystem" },
	{ .compatible = "marvell,dove-gpu-subsystem" },
	{}
};
MODULE_DEVICE_TABLE(of, dt_match);


static struct platform_driver etnaviv_platform_driver = {
	.probe      = etnaviv_pdev_probe,
	.remove     = etnaviv_pdev_remove,
	.driver     = {
		.name   = "etnaviv",
		.of_match_table = dt_match,
        },
};



static int __init etnaviv_init(void)
{
	int ret;

	etnaviv_validate_init();

	ret = platform_driver_register(&etnaviv_gpu_driver);
	if (ret != 0)
		return ret;

	ret = platform_driver_register(&etnaviv_platform_driver);
	if (ret != 0)
		platform_driver_unregister(&etnaviv_gpu_driver);

	return ret;
}
Contributors
Person Tokens Prop Commits CommitProp
the etnaviv authors the etnaviv authors 55 100.00% 1 100.00%
Total 55 100.00% 1 100.00%


module_init(etnaviv_init);



static void __exit etnaviv_exit(void)
{
	platform_driver_unregister(&etnaviv_gpu_driver);
	platform_driver_unregister(&etnaviv_platform_driver);
}
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Person Tokens Prop Commits CommitProp
the etnaviv authors the etnaviv authors 21 100.00% 1 100.00%
Total 21 100.00% 1 100.00%


module_exit(etnaviv_exit);

MODULE_AUTHOR("Christian Gmeiner <christian.gmeiner@gmail.com>");
MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
MODULE_AUTHOR("Lucas Stach <l.stach@pengutronix.de>");
MODULE_DESCRIPTION("etnaviv DRM Driver");
MODULE_LICENSE("GPL v2");
MODULE_ALIAS("platform:etnaviv");
Overall Contributors
Person Tokens Prop Commits CommitProp
the etnaviv authors the etnaviv authors 3211 99.97% 1 50.00%
daniel vetter daniel vetter 1 0.03% 1 50.00%
Total 3212 100.00% 2 100.00%
  Directory: drivers/gpu/drm/etnaviv

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
	Person	Tokens	Prop	Commits	CommitProp
the etnaviv authors	the etnaviv authors	131	100.00%	1	100.00%
	Total	131	100.00%	1	100.00%
cregit-Linux how code gets into the kernel

Release 4.7 drivers/gpu/drm/etnaviv/etnaviv_drv.c

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