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/*
* Based on work from:
* Andrew Andrianov <andrew@ncrmnt.org>
* Google
* The Linux Foundation
*
* 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/init.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/of_platform.h>
#include <linux/of_address.h>
#include <linux/clk.h>
#include <linux/dma-mapping.h>
#include <linux/cma.h>
#include <linux/dma-contiguous.h>
#include <linux/io.h>
#include <linux/of_reserved_mem.h>
#include "ion.h"
#include "ion_priv.h"
#include "ion_of.h"
static int ion_parse_dt_heap_common(struct device_node *heap_node,
struct ion_platform_heap *heap,
struct ion_of_heap *compatible)
{
int i;
for (i = 0; compatible[i].name; i++) {
if (of_device_is_compatible(heap_node, compatible[i].compat))
break;
}
if (!compatible[i].name)
return -ENODEV;
heap->id = compatible[i].heap_id;
heap->type = compatible[i].type;
heap->name = compatible[i].name;
heap->align = compatible[i].align;
/* Some kind of callback function pointer? */
pr_info("%s: id %d type %d name %s align %lx\n", __func__,
heap->id, heap->type, heap->name, heap->align);
return 0;
}
static int ion_setup_heap_common(struct platform_device *parent,
struct device_node *heap_node,
struct ion_platform_heap *heap)
{
int ret = 0;
switch (heap->type) {
case ION_HEAP_TYPE_CARVEOUT:
case ION_HEAP_TYPE_CHUNK:
if (heap->base && heap->size)
return 0;
ret = of_reserved_mem_device_init(heap->priv);
break;
default:
break;
}
return ret;
}
struct ion_platform_data *ion_parse_dt(struct platform_device *pdev,
struct ion_of_heap *compatible)
{
int num_heaps, ret;
const struct device_node *dt_node = pdev->dev.of_node;
struct device_node *node;
struct ion_platform_heap *heaps;
struct ion_platform_data *data;
int i = 0;
num_heaps = of_get_available_child_count(dt_node);
if (!num_heaps)
return ERR_PTR(-EINVAL);
heaps = devm_kzalloc(&pdev->dev,
sizeof(struct ion_platform_heap) * num_heaps,
GFP_KERNEL);
if (!heaps)
return ERR_PTR(-ENOMEM);
data = devm_kzalloc(&pdev->dev, sizeof(struct ion_platform_data),
GFP_KERNEL);
if (!data)
return ERR_PTR(-ENOMEM);
for_each_available_child_of_node(dt_node, node) {
struct platform_device *heap_pdev;
ret = ion_parse_dt_heap_common(node, &heaps[i], compatible);
if (ret)
return ERR_PTR(ret);
heap_pdev = of_platform_device_create(node, heaps[i].name,
&pdev->dev);
if (!pdev)
return ERR_PTR(-ENOMEM);
heap_pdev->dev.platform_data = &heaps[i];
heaps[i].priv = &heap_pdev->dev;
ret = ion_setup_heap_common(pdev, node, &heaps[i]);
if (ret)
goto out_err;
i++;
}
data->heaps = heaps;
data->nr = num_heaps;
return data;
out_err:
for ( ; i >= 0; i--)
if (heaps[i].priv)
of_device_unregister(to_platform_device(heaps[i].priv));
return ERR_PTR(ret);
}
void ion_destroy_platform_data(struct ion_platform_data *data)
{
int i;
for (i = 0; i < data->nr; i++)
if (data->heaps[i].priv)
of_device_unregister(to_platform_device(
data->heaps[i].priv));
}
#ifdef CONFIG_OF_RESERVED_MEM
#include <linux/of.h>
#include <linux/of_fdt.h>
#include <linux/of_reserved_mem.h>
static int rmem_ion_device_init(struct reserved_mem *rmem, struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct ion_platform_heap *heap = pdev->dev.platform_data;
heap->base = rmem->base;
heap->base = rmem->size;
pr_debug("%s: heap %s base %pa size %pa dev %p\n", __func__,
heap->name, &rmem->base, &rmem->size, dev);
return 0;
}
static void rmem_ion_device_release(struct reserved_mem *rmem,
struct device *dev)
{
return;
}
static const struct reserved_mem_ops rmem_dma_ops = {
.device_init = rmem_ion_device_init,
.device_release = rmem_ion_device_release,
};
static int __init rmem_ion_setup(struct reserved_mem *rmem)
{
phys_addr_t size = rmem->size;
size = size / 1024;
pr_info("Ion memory setup at %pa size %pa MiB\n",
&rmem->base, &size);
rmem->ops = &rmem_dma_ops;
return 0;
}
RESERVEDMEM_OF_DECLARE(ion, "ion-region", rmem_ion_setup);
#endif
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