ion: add snapshot of ion support for MSM

menuconfig ION

	bool "Ion Memory Manager"

	depends on HAVE_MEMBLOCK && HAS_DMA && MMU

	depends on HAVE_MEMBLOCK && HAS_DMA && MMU && ION_MSM

	select GENERIC_ALLOCATOR

	select DMA_SHARED_BUFFER

	---help---

	help

	  Choose this option if need to explicity set cache policy of the

	  pages in the page pool.

config ION_MSM

	tristate "Ion for MSM"

	depends on ARCH_QCOM && CMA

	select MSM_SECURE_BUFFER

	help

	  Choose this option if you wish to use ion on an MSM target.

	  Features include allocating heaps from device tree, buffer

	  cache maintenance, and a custom ioctl/compat_ioctl. Enable

	  utility functions used by ion_system_heap.

config ALLOC_BUFFERS_IN_4K_CHUNKS

	bool "Turns off allocation optimization and allocate only 4K pages"

	depends on ARCH_QCOM && ION

	help

          Choose this option if you want ION to allocate buffers in

          only 4KB chunks.

ifdef CONFIG_COMPAT

obj-$(CONFIG_ION) += compat_ion.o

endif

obj-$(CONFIG_ION_DUMMY) += ion_dummy_driver.o

obj-$(CONFIG_ION_TEGRA) += tegra/

obj-$(CONFIG_ION_HISI) += hisilicon/

obj-$(CONFIG_ION_MSM) += msm/

 * drivers/staging/android/ion/compat_ion.h

 *

 * Copyright (C) 2013 Google, Inc.

 * Copyright (c) 2016, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

long compat_ion_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);

#define compat_ion_user_handle_t compat_int_t

#else

#define compat_ion_ioctl  NULL

 * drivers/staging/android/ion/ion.c

 *

 * Copyright (C) 2011 Google, Inc.

 * Copyright (c) 2011-2016, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

 *

 */

#include <linux/device.h>

#include <linux/err.h>

#include <linux/file.h>

#include <linux/freezer.h>

#include <linux/anon_inodes.h>

#include <linux/kthread.h>

#include <linux/list.h>

#include <linux/list_sort.h>

#include <linux/memblock.h>

#include <linux/miscdevice.h>

#include <linux/export.h>

#include <linux/debugfs.h>

#include <linux/dma-buf.h>

#include <linux/idr.h>

#include <linux/msm_ion.h>

#include <trace/events/kmem.h>

#include "ion.h"

#include "ion_priv.h"

	struct idr idr;

	/* Protects idr */

	struct mutex lock;

	const char *name;

	char *name;

	char *display_name;

	int display_serial;

	struct task_struct *task;

	buffer->dev = dev;

	buffer->size = len;

	buffer->flags = flags;

	INIT_LIST_HEAD(&buffer->vmas);

	table = heap->ops->map_dma(heap, buffer);

	if (WARN_ONCE(!table,

		}

	}

	buffer->dev = dev;

	buffer->size = len;

	INIT_LIST_HEAD(&buffer->vmas);

	mutex_init(&buffer->lock);

	/*

	 * this will set up dma addresses for the sglist -- it is not

		sg_dma_address(sg) = sg_phys(sg);

		sg_dma_len(sg) = sg->length;

	}

	mutex_lock(&dev->buffer_lock);

	ion_buffer_add(dev, buffer);

	mutex_unlock(&dev->buffer_lock);

	if (WARN_ON(buffer->kmap_cnt > 0))

		buffer->heap->ops->unmap_kernel(buffer->heap, buffer);

	buffer->heap->ops->unmap_dma(buffer->heap, buffer);

	buffer->heap->ops->free(buffer);

	vfree(buffer->pages);

	kfree(buffer);

	return ret;

}

static int ion_handle_put(struct ion_handle *handle)

int ion_handle_put(struct ion_handle *handle)

{

	struct ion_client *client = handle->client;

	int ret;

	return handle ? handle : ERR_PTR(-EINVAL);

}

static struct ion_handle *ion_handle_get_by_id(struct ion_client *client,

struct ion_handle *ion_handle_get_by_id(struct ion_client *client,

					int id)

{

	struct ion_handle *handle;

	struct ion_buffer *buffer = NULL;

	struct ion_heap *heap;

	int ret;

	const unsigned int MAX_DBG_STR_LEN = 64;

	char dbg_str[MAX_DBG_STR_LEN];

	unsigned int dbg_str_idx = 0;

	dbg_str[0] = '\0';

	/*

	 * For now, we don't want to fault in pages individually since

	 * clients are already doing manual cache maintenance. In

	 * other words, the implicit caching infrastructure is in

	 * place (in code) but should not be used.

	 */

	flags |= ION_FLAG_CACHED_NEEDS_SYNC;

	pr_debug("%s: len %zu align %zu heap_id_mask %u flags %x\n", __func__,

		 len, align, heap_id_mask, flags);

		/* if the caller didn't specify this heap id */

		if (!((1 << heap->id) & heap_id_mask))

			continue;

		trace_ion_alloc_buffer_start(client->name, heap->name, len,

					     heap_id_mask, flags);

		buffer = ion_buffer_create(heap, dev, len, align, flags);

		trace_ion_alloc_buffer_end(client->name, heap->name, len,

					   heap_id_mask, flags);

		if (!IS_ERR(buffer))

			break;

		trace_ion_alloc_buffer_fallback(client->name, heap->name, len,

						heap_id_mask, flags,

						PTR_ERR(buffer));

		if (dbg_str_idx < MAX_DBG_STR_LEN) {

			unsigned int len_left;

			int ret_value;

			len_left = MAX_DBG_STR_LEN - dbg_str_idx - 1;

			ret_value = snprintf(&dbg_str[dbg_str_idx],

					     len_left, "%s ", heap->name);

			if (ret_value >= len_left) {

				/* overflow */

				dbg_str[MAX_DBG_STR_LEN - 1] = '\0';

				dbg_str_idx = MAX_DBG_STR_LEN;

			} else if (ret_value >= 0) {

				dbg_str_idx += ret_value;

			} else {

				/* error */

				dbg_str[MAX_DBG_STR_LEN - 1] = '\0';

			}

		}

	}

	up_read(&dev->lock);

	if (buffer == NULL)

	if (!buffer) {

		trace_ion_alloc_buffer_fail(client->name, dbg_str, len,

					    heap_id_mask, flags, -ENODEV);

		return ERR_PTR(-ENODEV);

	}

	if (IS_ERR(buffer))

	if (IS_ERR(buffer)) {

		trace_ion_alloc_buffer_fail(client->name, dbg_str, len,

					    heap_id_mask, flags,

					    PTR_ERR(buffer));

		pr_debug("ION is unable to allocate 0x%zx bytes (alignment: 0x%zx) from heap(s) %sfor client %s\n",

			 len, align, dbg_str, client->name);

		return ERR_CAST(buffer);

	}

	handle = ion_handle_create(client, buffer);

	WARN_ON(client != handle->client);

	valid_handle = ion_handle_validate(client, handle);

	if (!valid_handle) {

		WARN(1, "%s: invalid handle passed to free.\n", __func__);

		return;

{

	struct ion_client *client = s->private;

	struct rb_node *n;

	size_t sizes[ION_NUM_HEAP_IDS] = {0};

	const char *names[ION_NUM_HEAP_IDS] = {NULL};

	int i;

	seq_printf(s, "%16.16s: %16.16s : %16.16s : %12.12s\n",

		   "heap_name", "size_in_bytes", "handle refcount",

		   "buffer");

	mutex_lock(&debugfs_mutex);

	if (!is_client_alive(client)) {

	for (n = rb_first(&client->handles); n; n = rb_next(n)) {

		struct ion_handle *handle = rb_entry(n, struct ion_handle,

						     node);

		unsigned int id = handle->buffer->heap->id;

		if (!names[id])

			names[id] = handle->buffer->heap->name;

		sizes[id] += handle->buffer->size;

		seq_printf(s, "%16.16s: %16zx : %16d : %12p",

			   handle->buffer->heap->name,

			   handle->buffer->size,

			   atomic_read(&handle->ref.refcount),

			   handle->buffer);

		seq_puts(s, "\n");

	}

	mutex_unlock(&client->lock);

	mutex_unlock(&debugfs_mutex);

	seq_printf(s, "%16.16s: %16.16s\n", "heap_name", "size_in_bytes");

	for (i = 0; i < ION_NUM_HEAP_IDS; i++) {

		if (!names[i])

			continue;

		seq_printf(s, "%16.16s: %16zu\n", names[i], sizes[i]);

	}

	return 0;

}

	client->handles = RB_ROOT;

	idr_init(&client->idr);

	mutex_init(&client->lock);

	client->task = task;

	client->pid = pid;

	client->name = kstrdup(name, GFP_KERNEL);

		put_task_struct(client->task);

	rb_erase(&client->node, &dev->clients);

	debugfs_remove_recursive(client->debug_root);

	up_write(&dev->lock);

	kfree(client->display_name);

}

EXPORT_SYMBOL(ion_client_destroy);

int ion_handle_get_flags(struct ion_client *client, struct ion_handle *handle,

			 unsigned long *flags)

{

	struct ion_buffer *buffer;

	mutex_lock(&client->lock);

	if (!ion_handle_validate(client, handle)) {

		pr_err("%s: invalid handle passed to %s.\n",

		       __func__, __func__);

		mutex_unlock(&client->lock);

		return -EINVAL;

	}

	buffer = handle->buffer;

	mutex_lock(&buffer->lock);

	*flags = buffer->flags;

	mutex_unlock(&buffer->lock);

	mutex_unlock(&client->lock);

	return 0;

}

EXPORT_SYMBOL(ion_handle_get_flags);

int ion_handle_get_size(struct ion_client *client, struct ion_handle *handle,

			size_t *size)

{

	struct ion_buffer *buffer;

	mutex_lock(&client->lock);

	if (!ion_handle_validate(client, handle)) {

		pr_err("%s: invalid handle passed to %s.\n",

		       __func__, __func__);

		mutex_unlock(&client->lock);

		return -EINVAL;

	}

	buffer = handle->buffer;

	mutex_lock(&buffer->lock);

	*size = buffer->size;

	mutex_unlock(&buffer->lock);

	mutex_unlock(&client->lock);

	return 0;

}

EXPORT_SYMBOL(ion_handle_get_size);

struct sg_table *ion_sg_table(struct ion_client *client,

			      struct ion_handle *handle)

{

}

EXPORT_SYMBOL(ion_sg_table);

struct sg_table *ion_create_chunked_sg_table(phys_addr_t buffer_base,

					     size_t chunk_size,

					     size_t total_size)

{

	struct sg_table *table;

	int i, n_chunks, ret;

	struct scatterlist *sg;

	table = kzalloc(sizeof(*table), GFP_KERNEL);

	if (!table)

		return ERR_PTR(-ENOMEM);

	n_chunks = DIV_ROUND_UP(total_size, chunk_size);

	pr_debug("creating sg_table with %d chunks\n", n_chunks);

	ret = sg_alloc_table(table, n_chunks, GFP_KERNEL);

	if (ret)

		goto err0;

	for_each_sg(table->sgl, sg, table->nents, i) {

		dma_addr_t addr = buffer_base + i * chunk_size;

		sg_dma_address(sg) = addr;

		sg->length = chunk_size;

	}

	return table;

err0:

	kfree(table);

	return ERR_PTR(ret);

}

static void ion_buffer_sync_for_device(struct ion_buffer *buffer,

				       struct device *dev,

				       enum dma_data_direction direction);

		break;

	}

	mutex_unlock(&buffer->lock);

	if (buffer->heap->ops->unmap_user)

		buffer->heap->ops->unmap_user(buffer->heap, buffer);

}

static const struct vm_operations_struct ion_vma_ops = {

							VM_DONTDUMP;

		vma->vm_private_data = buffer;

		vma->vm_ops = &ion_vma_ops;

		vma->vm_flags |= VM_MIXEDMAP;

		ion_vm_open(vma);

		return 0;

	}

	fd = dma_buf_fd(dmabuf, O_CLOEXEC);

	if (fd < 0)

		dma_buf_put(dmabuf);

	return fd;

}

EXPORT_SYMBOL(ion_share_dma_buf_fd);

						data.custom.arg);

		break;

	}

	case ION_IOC_CLEAN_CACHES:

		return client->dev->custom_ioctl(client,

						ION_IOC_CLEAN_CACHES, arg);

	case ION_IOC_INV_CACHES:

		return client->dev->custom_ioctl(client,

						ION_IOC_INV_CACHES, arg);

	case ION_IOC_CLEAN_INV_CACHES:

		return client->dev->custom_ioctl(client,

						ION_IOC_CLEAN_INV_CACHES, arg);

	default:

		return -ENOTTY;

	}

	return size;

}

/**

 * Create a mem_map of the heap.

 * @param s seq_file to log error message to.

 * @param heap The heap to create mem_map for.

 * @param mem_map The mem map to be created.

 */

void ion_debug_mem_map_create(struct seq_file *s, struct ion_heap *heap,

			      struct list_head *mem_map)

{

	struct ion_device *dev = heap->dev;

	struct rb_node *cnode;

	size_t size;

	struct ion_client *client;

	if (!heap->ops->phys)

		return;

	down_read(&dev->lock);

	for (cnode = rb_first(&dev->clients); cnode; cnode = rb_next(cnode)) {

		struct rb_node *hnode;

		client = rb_entry(cnode, struct ion_client, node);

		mutex_lock(&client->lock);

		for (hnode = rb_first(&client->handles);

		     hnode;

		     hnode = rb_next(hnode)) {

			struct ion_handle *handle = rb_entry(

				hnode, struct ion_handle, node);

			if (handle->buffer->heap == heap) {

				struct mem_map_data *data =

					kzalloc(sizeof(*data), GFP_KERNEL);

				if (!data)

					goto inner_error;

				heap->ops->phys(heap, handle->buffer,

						&data->addr, &size);

				data->size = (unsigned long)size;

				data->addr_end = data->addr + data->size - 1;

				data->client_name = kstrdup(client->name,

							GFP_KERNEL);

				if (!data->client_name) {

					kfree(data);

					goto inner_error;

				}

				list_add(&data->node, mem_map);

			}

		}

		mutex_unlock(&client->lock);

	}

	up_read(&dev->lock);

	return;

inner_error:

	seq_puts(s,

		 "ERROR: out of memory. Part of memory map will not be logged\n");

	mutex_unlock(&client->lock);

	up_read(&dev->lock);

}

/**

 * Free the memory allocated by ion_debug_mem_map_create

 * @param mem_map The mem map to free.

 */

static void ion_debug_mem_map_destroy(struct list_head *mem_map)

{

	if (mem_map) {

		struct mem_map_data *data, *tmp;

		list_for_each_entry_safe(data, tmp, mem_map, node) {

			list_del(&data->node);

			kfree(data->client_name);

			kfree(data);

		}

	}

}

static int mem_map_cmp(void *priv, struct list_head *a, struct list_head *b)

{

	struct mem_map_data *d1, *d2;

	d1 = list_entry(a, struct mem_map_data, node);

	d2 = list_entry(b, struct mem_map_data, node);

	if (d1->addr == d2->addr)

		return d1->size - d2->size;

	return d1->addr - d2->addr;

}

/**

 * Print heap debug information.

 * @param s seq_file to log message to.

 * @param heap pointer to heap that we will print debug information for.

 */

static void ion_heap_print_debug(struct seq_file *s, struct ion_heap *heap)

{

	if (heap->ops->print_debug) {

		struct list_head mem_map = LIST_HEAD_INIT(mem_map);

		ion_debug_mem_map_create(s, heap, &mem_map);

		list_sort(NULL, &mem_map, mem_map_cmp);

		heap->ops->print_debug(heap, s, &mem_map);

		ion_debug_mem_map_destroy(&mem_map);

	}

}

static int ion_debug_heap_show(struct seq_file *s, void *unused)

{

	struct ion_heap *heap = s->private;

	if (heap->debug_show)

		heap->debug_show(heap, s, unused);

	ion_heap_print_debug(s, heap);

	return 0;

}

}

EXPORT_SYMBOL(ion_device_add_heap);

int ion_walk_heaps(struct ion_client *client, int heap_id, void *data,

		   int (*f)(struct ion_heap *heap, void *data))

{

	int ret_val = -EINVAL;

	struct ion_heap *heap;

	struct ion_device *dev = client->dev;

	/*

	 * traverse the list of heaps available in this system

	 * and find the heap that is specified.

	 */

	down_write(&dev->lock);

	plist_for_each_entry(heap, &dev->heaps, node) {

		if (ION_HEAP(heap->id) != heap_id)

			continue;

		ret_val = f(heap, data);

		break;

	}

	up_write(&dev->lock);

	return ret_val;

}

EXPORT_SYMBOL(ion_walk_heaps);

struct ion_device *ion_device_create(long (*custom_ioctl)

				     (struct ion_client *client,

				      unsigned int cmd,

			int ret = memblock_reserve(data->heaps[i].base,

					       data->heaps[i].size);

			if (ret)

				pr_err("memblock reserve of %zx@%lx failed\n",

				pr_err("memblock reserve of %zx@%pa failed\n",

				       data->heaps[i].size,

				       data->heaps[i].base);

				       &data->heaps[i].base);

		}

		pr_info("%s: %s reserved base %lx size %zu\n", __func__,

		pr_info("%s: %s reserved base %pa size %zu\n", __func__,

			data->heaps[i].name,

			data->heaps[i].base,

			&data->heaps[i].base,

			data->heaps[i].size);

	}

}

 * drivers/staging/android/ion/ion.h

 *

 * Copyright (C) 2011 Google, Inc.

 * Copyright (c) 2011-2016, The Linux Foundation. All rights reserved.

 *

 * This software is licensed under the terms of the GNU General Public

 * License version 2, as published by the Free Software Foundation, and

#ifndef _LINUX_ION_H

#define _LINUX_ION_H

#include <linux/types.h>

#include <linux/err.h>

#include "../uapi/ion.h"

struct ion_handle;

 * be converted to phys_addr_t.  For the time being many kernel interfaces

 * do not accept phys_addr_t's that would have to

 */

#define ion_phys_addr_t unsigned long

#define ion_phys_addr_t dma_addr_t

/**

 * struct ion_platform_heap - defines a heap in the given platform

 * @name:	used for debug purposes

 * @base:	base address of heap in physical memory if applicable

 * @size:	size of the heap in bytes if applicable

 * @has_outer_cache:    set to 1 if outer cache is used, 0 otherwise.

 * @extra_data:	Extra data specific to each heap type

 * @priv:	heap private data

 * @align:	required alignment in physical memory if applicable

 * @priv:	private info passed from the board file

 *

	const char *name;

	ion_phys_addr_t base;

	size_t size;

	unsigned int has_outer_cache;

	void *extra_data;

	ion_phys_addr_t align;

	void *priv;

};

/**

 * struct ion_platform_data - array of platform heaps passed from board file

 * @has_outer_cache:    set to 1 if outer cache is used, 0 otherwise.

 * @nr:    number of structures in the array

 * @heaps: array of platform_heap structions

 *

 * Provided by the board file in the form of platform data to a platform device.

 */

struct ion_platform_data {

	unsigned int has_outer_cache;

	int nr;

	struct ion_platform_heap *heaps;

};

#ifdef CONFIG_ION

/**